Date   
Re: SP9UOB balloon over Cache Valley

Tyler Griffiths
 

Pretty bad path for a balloon. Wide1-1,Wide2-1



Tyler Griffiths
N7UWX

See where I am:
http://goo.gl/nC3m57

On Tue, Jul 18, 2017 at 8:41 AM, Jared Smith <jared@...> wrote:
A high altitude pico balloon launched in Poland on June 15 is over the North end of the valley now at 47,000 feet. You can track it at https://tracker.habhub.org/#!mt=roadmap&mz=9&qm=All&mc=41.78482,-111.60041&q=SP9UOB

It beacons with APRS every minute. Contestia 32/1000 on 144.251 MHz USB every minute. CW every 5 minutes and "HI" between telemetry transmissions on 144.251 MHz USB.

Jared



Re: PCB designer? Weight issues.

Jared Smith
 

My charge controller boards have arrived and they actually work - despite my soldering skills! Photos are attached.

I'll probably design a second version with a few minor modifications - mostly a smaller Schottky diode, bigger pads for that pesky Inductor (the L1 silver component near the top left), and better labelling.

This charges the supercapacitor to 5.2 volts from only a couple small .5v solar cells. I now need to determine how many solar cells I need to provide sufficient current for the 2 minute transmission. My current draw is 3-5mA when idle, 35mA during GPS acquisition, and 42 mA when transmitting.

I hacked around the issue of the transmitter interfering with the GPS. I added an NPN transistor to act as a switch to use the Arduino to turn the power on to the transmitter only when it's needed. Unfortunately, when I turned it on, the interference kicked the GPS out of sleep mode (jumping it from 5mA to 30mA, or 70+mA for everything). So I added a second switch to turn the GPS off when it's not needed. This adds a bit of weight and requires a longer cold boot GPS fix every 10 minutes, but that shouldn't be an issue at 40,000 feet.

If I can get the antenna set up and everything tied together, I might see if the USU folks will let me fly one on one of their balloons this Saturday.

Jared


On Thu, Jul 6, 2017 at 10:25 AM, Kevin Reeve <kevin.reeve@...> wrote:
Jared,

I have a temp controlled soldering station that includes the heat gun for SMD work/rework, and various tip sizes.  I also have some awesome indium solder. You are welcome to use it.

 There are some great SMD solder videos on Utube.  Some use solder paste across the pads, hold the component with tweezers and heat it up with the heat gun and push in place.

Kevin


From: <BARC-HAB@groups.io> on behalf of Josh Jensen <kd7wrc@...>
Reply-To: "BARC-HAB@groups.io" <BARC-HAB@groups.io>
Date: Thursday, July 6, 2017 at 10:14 AM
To: "BARC-HAB@groups.io" <BARC-HAB@groups.io>
Subject: Re: [BARC-HAB] PCB designer? Weight issues.

Jared,

0603 components aren't that bad to solder. It's when you get down to 0402 size that they get to be a pain. 

Josh

On Jul 6, 2017 09:46, "Jared Smith" <jared@...> wrote:
After realizing the previous charge controller wouldn't work, I decided to design my own. The schematic and PCB renders are attached. This uses the SPV1040 charge controller - http://www.st.com/en/power-management/spv1040.html - and is generally based on their example board - http://www.st.com/resource/en/application_note/cd00292052.pdf

The board is very small - only 1 inch X .5 inches. The components are mostly tiny 0603 size - so should be a fun challenge to solder. The IC is 3mmX4.4mm.

The S+/- pads are for the small solar cells. I should be able to use 2 of them in series to make ~1.2 volts. The circuit then upconverts this to 5 volts which charges the supercapacitor (CAP+/-) which functions as a battery (except this one works at -40 degrees). It then routes back to V+/- which will go to the Arduino raw power input. Most of the capacitors and resistors are used to set the controller charge values.

There's also a voltage divider on the output that goes to the A connector. This will allow me to measure the output voltage from the Arduino so I don't transmit or turn on the GPS if the voltage is too low.

Feedback or criticism of the design is VERY welcome. I figure I have around 50/50 odds that I designed this in a way that will actually work. I'll order up some PCBs from OSH Park soon and give it a go.

Thanks,

Jared



On Wed, Jun 28, 2017 at 8:06 AM, Jared Smith <jared@...> wrote:
Thank you Brandon.


I'll put together a GitHub repository for the code and will share it soon. You won't really be able to test it without the hardware, but I'm happy to share it.

The charge controller didn't work as expected. The idea was good (the board was only .6 grams), but I didn't realize that the IC has an input current limiter of 100mA. With the voltage upconvert (1.5v converted to 4.2v), this decreases current and didn't leave enough to keep things running. By the time I added enough solar cells to maintain adequate current, it no longer provided a weight saving to use the charge controller. I'm looking at different options - or just might go with a slightly smaller solar cell and run 8 or 9 of them.

I've been testing everything and it seems to work great. I have it sitting out in the sun this morning to see what happens in marginal solar conditions as the sun comes up. The WSPR mode is incredibly efficient - it was heard in Florida on 10 milliwatts last night. The new, smaller clock generator should be here in a couple weeks, then I think I'll have most everything necessary for a launch.

Jared




On Tue, Jun 27, 2017 at 11:48 PM, Brandon Tibbitts <Tibbs327@...> wrote:

Yep, that sounds like you're on the right track. I'll keep my eye open for thin PCB options, and once everything is proven out, then could help put it all to one thin/tiny PCB. As you mentioned that is key for longer term reliability.

Simple GPS antenna work better horizontal, but not entirely deaf while vertical either..

Do you have a system/component overview? Or did I miss it somewhere. Also were you archiving the code somewhere?

Brandon




Re: PCB designer? Weight issues.

Josh Jensen
 

Jared,

If you can't hitch a ride on a is balloon, I'm still willing to take you up on the hexacopter. I have a telemetry down link now, so I can see what the status is. Including altitude. It would just have to wait until I get back in town, which looks like it will be the 31st.

Josh

On Jul 24, 2017 01:20, "Jared Smith" <jared@...> wrote:
My charge controller boards have arrived and they actually work - despite my soldering skills! Photos are attached.

I'll probably design a second version with a few minor modifications - mostly a smaller Schottky diode, bigger pads for that pesky Inductor (the L1 silver component near the top left), and better labelling.

This charges the supercapacitor to 5.2 volts from only a couple small .5v solar cells. I now need to determine how many solar cells I need to provide sufficient current for the 2 minute transmission. My current draw is 3-5mA when idle, 35mA during GPS acquisition, and 42 mA when transmitting.

I hacked around the issue of the transmitter interfering with the GPS. I added an NPN transistor to act as a switch to use the Arduino to turn the power on to the transmitter only when it's needed. Unfortunately, when I turned it on, the interference kicked the GPS out of sleep mode (jumping it from 5mA to 30mA, or 70+mA for everything). So I added a second switch to turn the GPS off when it's not needed. This adds a bit of weight and requires a longer cold boot GPS fix every 10 minutes, but that shouldn't be an issue at 40,000 feet.

If I can get the antenna set up and everything tied together, I might see if the USU folks will let me fly one on one of their balloons this Saturday.

Jared


On Thu, Jul 6, 2017 at 10:25 AM, Kevin Reeve <kevin.reeve@...> wrote:
Jared,

I have a temp controlled soldering station that includes the heat gun for SMD work/rework, and various tip sizes.  I also have some awesome indium solder. You are welcome to use it.

 There are some great SMD solder videos on Utube.  Some use solder paste across the pads, hold the component with tweezers and heat it up with the heat gun and push in place.

Kevin


From: <BARC-HAB@groups.io> on behalf of Josh Jensen <kd7wrc@...>
Reply-To: "BARC-HAB@groups.io" <BARC-HAB@groups.io>
Date: Thursday, July 6, 2017 at 10:14 AM
To: "BARC-HAB@groups.io" <BARC-HAB@groups.io>
Subject: Re: [BARC-HAB] PCB designer? Weight issues.

Jared,

0603 components aren't that bad to solder. It's when you get down to 0402 size that they get to be a pain. 

Josh

On Jul 6, 2017 09:46, "Jared Smith" <jared@...> wrote:
After realizing the previous charge controller wouldn't work, I decided to design my own. The schematic and PCB renders are attached. This uses the SPV1040 charge controller - http://www.st.com/en/power-management/spv1040.html - and is generally based on their example board - http://www.st.com/resource/en/application_note/cd00292052.pdf

The board is very small - only 1 inch X .5 inches. The components are mostly tiny 0603 size - so should be a fun challenge to solder. The IC is 3mmX4.4mm.

The S+/- pads are for the small solar cells. I should be able to use 2 of them in series to make ~1.2 volts. The circuit then upconverts this to 5 volts which charges the supercapacitor (CAP+/-) which functions as a battery (except this one works at -40 degrees). It then routes back to V+/- which will go to the Arduino raw power input. Most of the capacitors and resistors are used to set the controller charge values.

There's also a voltage divider on the output that goes to the A connector. This will allow me to measure the output voltage from the Arduino so I don't transmit or turn on the GPS if the voltage is too low.

Feedback or criticism of the design is VERY welcome. I figure I have around 50/50 odds that I designed this in a way that will actually work. I'll order up some PCBs from OSH Park soon and give it a go.

Thanks,

Jared



On Wed, Jun 28, 2017 at 8:06 AM, Jared Smith <jared@...> wrote:
Thank you Brandon.


I'll put together a GitHub repository for the code and will share it soon. You won't really be able to test it without the hardware, but I'm happy to share it.

The charge controller didn't work as expected. The idea was good (the board was only .6 grams), but I didn't realize that the IC has an input current limiter of 100mA. With the voltage upconvert (1.5v converted to 4.2v), this decreases current and didn't leave enough to keep things running. By the time I added enough solar cells to maintain adequate current, it no longer provided a weight saving to use the charge controller. I'm looking at different options - or just might go with a slightly smaller solar cell and run 8 or 9 of them.

I've been testing everything and it seems to work great. I have it sitting out in the sun this morning to see what happens in marginal solar conditions as the sun comes up. The WSPR mode is incredibly efficient - it was heard in Florida on 10 milliwatts last night. The new, smaller clock generator should be here in a couple weeks, then I think I'll have most everything necessary for a launch.

Jared




On Tue, Jun 27, 2017 at 11:48 PM, Brandon Tibbitts <Tibbs327@...> wrote:

Yep, that sounds like you're on the right track. I'll keep my eye open for thin PCB options, and once everything is proven out, then could help put it all to one thin/tiny PCB. As you mentioned that is key for longer term reliability.

Simple GPS antenna work better horizontal, but not entirely deaf while vertical either..

Do you have a system/component overview? Or did I miss it somewhere. Also were you archiving the code somewhere?

Brandon




Balloon launch this Saturday? Helium?

Jared Smith
 

Thanks again to those who helped with the balloon tracking and
recovery last weekend.

If everything comes together and if the weather cooperates, I'm hoping
to try my own launch this Saturday.

Kevin (or others), where do you source the helium from? Do you use the
standard industrial grade helium? Can I just walk into AirGas and get
what I need?

I'm going to float 1 (or maybe 2, depending on my final payload
weight) X 36" mylar balloons. The helium requirement is around 3.5
cubic feet each. So I should be able to do 2 or 3 launches with a Size
20 (20 cubic feet) cylinder.

I'm also designing a new PCB that will act as a shield for the Arduino
Mini. It will have the GPS, transmitter, and charge controller all on
one board and will mate directly with the Arduino via headers - thus
nearly eliminating my need for wires - and greatly reducing the total
payload weight.

I'll keep you apprised of launch details.

Thanks,

Jared

Re: Balloon launch this Saturday? Helium?

Kevin Reeve
 

Jared,

We have gotten our helium from USU lab gas sales on campus.
I think they get it from AirGas.



Kevin

On 8/6/17, 6:57 PM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:

Thanks again to those who helped with the balloon tracking and
recovery last weekend.

If everything comes together and if the weather cooperates, I'm hoping
to try my own launch this Saturday.

Kevin (or others), where do you source the helium from? Do you use the
standard industrial grade helium? Can I just walk into AirGas and get
what I need?

I'm going to float 1 (or maybe 2, depending on my final payload
weight) X 36" mylar balloons. The helium requirement is around 3.5
cubic feet each. So I should be able to do 2 or 3 launches with a Size
20 (20 cubic feet) cylinder.

I'm also designing a new PCB that will act as a shield for the Arduino
Mini. It will have the GPS, transmitter, and charge controller all on
one board and will mate directly with the Arduino via headers - thus
nearly eliminating my need for wires - and greatly reducing the total
payload weight.

I'll keep you apprised of launch details.

Thanks,

Jared


Re: Balloon launch this Saturday? Helium?

Jared Smith
 

Thanks Kevin. I'll check with AirGas and see what they can provide.

I'm not sure if I'll be able to get a payload fully together by
Saturday, but I'm going to try because the forecast looks good. I have
to launch when it's very clear. I also have to account for downwind
storms to try to avoid high altitude thunderstorms. With a neck lift
of only 2-3 grams (about the weight of a dime) if the balloon passes
through any clouds it will pick up enough condensation to bring it
down.

The USU GAS team is planning a launch tomorrow (Wednesday) with the
payload for the Japanese students. I'm not sure of specifics (date,
location, etc.), but they want to fully support it themselves - which
I think is wonderful (and I'll cross my fingers for their success).
But you may want to monitor APRS or HabHub. I believe the call will be
ERRNO-1.

Jared

On Sun, Aug 6, 2017 at 7:04 PM, Kevin Reeve <kevin.reeve@...> wrote:
Jared,

We have gotten our helium from USU lab gas sales on campus.
I think they get it from AirGas.



Kevin





On 8/6/17, 6:57 PM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:

Thanks again to those who helped with the balloon tracking and
recovery last weekend.

If everything comes together and if the weather cooperates, I'm hoping
to try my own launch this Saturday.

Kevin (or others), where do you source the helium from? Do you use the
standard industrial grade helium? Can I just walk into AirGas and get
what I need?

I'm going to float 1 (or maybe 2, depending on my final payload
weight) X 36" mylar balloons. The helium requirement is around 3.5
cubic feet each. So I should be able to do 2 or 3 launches with a Size
20 (20 cubic feet) cylinder.

I'm also designing a new PCB that will act as a shield for the Arduino
Mini. It will have the GPS, transmitter, and charge controller all on
one board and will mate directly with the Arduino via headers - thus
nearly eliminating my need for wires - and greatly reducing the total
payload weight.

I'll keep you apprised of launch details.

Thanks,

Jared



Re: Balloon launch this Saturday? Helium?

Jared Smith
 

The GAS team balloon is in the air. It's ERRNO-6. Currently at 48,000
approaching Logan from the West. We should be able to see it... even
through the smoke.

Jared

On Tue, Aug 8, 2017 at 4:21 PM, Jared Smith <jared@...> wrote:
Thanks Kevin. I'll check with AirGas and see what they can provide.

I'm not sure if I'll be able to get a payload fully together by
Saturday, but I'm going to try because the forecast looks good. I have
to launch when it's very clear. I also have to account for downwind
storms to try to avoid high altitude thunderstorms. With a neck lift
of only 2-3 grams (about the weight of a dime) if the balloon passes
through any clouds it will pick up enough condensation to bring it
down.

The USU GAS team is planning a launch tomorrow (Wednesday) with the
payload for the Japanese students. I'm not sure of specifics (date,
location, etc.), but they want to fully support it themselves - which
I think is wonderful (and I'll cross my fingers for their success).
But you may want to monitor APRS or HabHub. I believe the call will be
ERRNO-1.

Jared


On Sun, Aug 6, 2017 at 7:04 PM, Kevin Reeve <kevin.reeve@...> wrote:
Jared,

We have gotten our helium from USU lab gas sales on campus.
I think they get it from AirGas.



Kevin





On 8/6/17, 6:57 PM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:

Thanks again to those who helped with the balloon tracking and
recovery last weekend.

If everything comes together and if the weather cooperates, I'm hoping
to try my own launch this Saturday.

Kevin (or others), where do you source the helium from? Do you use the
standard industrial grade helium? Can I just walk into AirGas and get
what I need?

I'm going to float 1 (or maybe 2, depending on my final payload
weight) X 36" mylar balloons. The helium requirement is around 3.5
cubic feet each. So I should be able to do 2 or 3 launches with a Size
20 (20 cubic feet) cylinder.

I'm also designing a new PCB that will act as a shield for the Arduino
Mini. It will have the GPS, transmitter, and charge controller all on
one board and will mate directly with the Arduino via headers - thus
nearly eliminating my need for wires - and greatly reducing the total
payload weight.

I'll keep you apprised of launch details.

Thanks,

Jared



Re: Balloon launch this Saturday? Helium?

Kevin Reeve
 

This one has some excellent climbing skills. Doing great!

Kevin

On 8/9/17, 9:36 AM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:

The GAS team balloon is in the air. It's ERRNO-6. Currently at 48,000
approaching Logan from the West. We should be able to see it... even
through the smoke.

Jared

On Tue, Aug 8, 2017 at 4:21 PM, Jared Smith <jared@...> wrote:
Thanks Kevin. I'll check with AirGas and see what they can provide.

I'm not sure if I'll be able to get a payload fully together by
Saturday, but I'm going to try because the forecast looks good. I have
to launch when it's very clear. I also have to account for downwind
storms to try to avoid high altitude thunderstorms. With a neck lift
of only 2-3 grams (about the weight of a dime) if the balloon passes
through any clouds it will pick up enough condensation to bring it
down.

The USU GAS team is planning a launch tomorrow (Wednesday) with the
payload for the Japanese students. I'm not sure of specifics (date,
location, etc.), but they want to fully support it themselves - which
I think is wonderful (and I'll cross my fingers for their success).
But you may want to monitor APRS or HabHub. I believe the call will be
ERRNO-1.

Jared


On Sun, Aug 6, 2017 at 7:04 PM, Kevin Reeve <kevin.reeve@...> wrote:
Jared,

We have gotten our helium from USU lab gas sales on campus.
I think they get it from AirGas.



Kevin





On 8/6/17, 6:57 PM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:

Thanks again to those who helped with the balloon tracking and
recovery last weekend.

If everything comes together and if the weather cooperates, I'm hoping
to try my own launch this Saturday.

Kevin (or others), where do you source the helium from? Do you use the
standard industrial grade helium? Can I just walk into AirGas and get
what I need?

I'm going to float 1 (or maybe 2, depending on my final payload
weight) X 36" mylar balloons. The helium requirement is around 3.5
cubic feet each. So I should be able to do 2 or 3 launches with a Size
20 (20 cubic feet) cylinder.

I'm also designing a new PCB that will act as a shield for the Arduino
Mini. It will have the GPS, transmitter, and charge controller all on
one board and will mate directly with the Arduino via headers - thus
nearly eliminating my need for wires - and greatly reducing the total
payload weight.

I'll keep you apprised of launch details.

Thanks,

Jared




Re: Balloon launch this Saturday? Helium?

Jared Smith
 

Oh no! It landed in the retention ponds West of town! Hopefully it
floats and they can retrieve it without too much damage. We'll see if
it continues to beacon.

Jared

On Wed, Aug 9, 2017 at 10:06 AM, Kevin Reeve <kevin.reeve@...> wrote:
This one has some excellent climbing skills. Doing great!

Kevin





On 8/9/17, 9:36 AM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:

The GAS team balloon is in the air. It's ERRNO-6. Currently at 48,000
approaching Logan from the West. We should be able to see it... even
through the smoke.

Jared

On Tue, Aug 8, 2017 at 4:21 PM, Jared Smith <jared@...> wrote:
Thanks Kevin. I'll check with AirGas and see what they can provide.

I'm not sure if I'll be able to get a payload fully together by
Saturday, but I'm going to try because the forecast looks good. I have
to launch when it's very clear. I also have to account for downwind
storms to try to avoid high altitude thunderstorms. With a neck lift
of only 2-3 grams (about the weight of a dime) if the balloon passes
through any clouds it will pick up enough condensation to bring it
down.

The USU GAS team is planning a launch tomorrow (Wednesday) with the
payload for the Japanese students. I'm not sure of specifics (date,
location, etc.), but they want to fully support it themselves - which
I think is wonderful (and I'll cross my fingers for their success).
But you may want to monitor APRS or HabHub. I believe the call will be
ERRNO-1.

Jared


On Sun, Aug 6, 2017 at 7:04 PM, Kevin Reeve <kevin.reeve@...> wrote:
Jared,

We have gotten our helium from USU lab gas sales on campus.
I think they get it from AirGas.



Kevin





On 8/6/17, 6:57 PM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:

Thanks again to those who helped with the balloon tracking and
recovery last weekend.

If everything comes together and if the weather cooperates, I'm hoping
to try my own launch this Saturday.

Kevin (or others), where do you source the helium from? Do you use the
standard industrial grade helium? Can I just walk into AirGas and get
what I need?

I'm going to float 1 (or maybe 2, depending on my final payload
weight) X 36" mylar balloons. The helium requirement is around 3.5
cubic feet each. So I should be able to do 2 or 3 launches with a Size
20 (20 cubic feet) cylinder.

I'm also designing a new PCB that will act as a shield for the Arduino
Mini. It will have the GPS, transmitter, and charge controller all on
one board and will mate directly with the Arduino via headers - thus
nearly eliminating my need for wires - and greatly reducing the total
payload weight.

I'll keep you apprised of launch details.

Thanks,

Jared





Re: Balloon launch this Saturday? Helium?

Kevin Reeve
 

Did you run any predictions?

Sent from my iPhone

On Aug 9, 2017, at 10:53 AM, Jared Smith <jared@...> wrote:

Oh no! It landed in the retention ponds West of town! Hopefully it
floats and they can retrieve it without too much damage. We'll see if
it continues to beacon.

Jared

On Wed, Aug 9, 2017 at 10:06 AM, Kevin Reeve <kevin.reeve@...> wrote:
This one has some excellent climbing skills. Doing great!

Kevin





On 8/9/17, 9:36 AM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:

The GAS team balloon is in the air. It's ERRNO-6. Currently at 48,000
approaching Logan from the West. We should be able to see it... even
through the smoke.

Jared

On Tue, Aug 8, 2017 at 4:21 PM, Jared Smith <jared@...> wrote:
Thanks Kevin. I'll check with AirGas and see what they can provide.

I'm not sure if I'll be able to get a payload fully together by
Saturday, but I'm going to try because the forecast looks good. I have
to launch when it's very clear. I also have to account for downwind
storms to try to avoid high altitude thunderstorms. With a neck lift
of only 2-3 grams (about the weight of a dime) if the balloon passes
through any clouds it will pick up enough condensation to bring it
down.

The USU GAS team is planning a launch tomorrow (Wednesday) with the
payload for the Japanese students. I'm not sure of specifics (date,
location, etc.), but they want to fully support it themselves - which
I think is wonderful (and I'll cross my fingers for their success).
But you may want to monitor APRS or HabHub. I believe the call will be
ERRNO-1.

Jared


On Sun, Aug 6, 2017 at 7:04 PM, Kevin Reeve <kevin.reeve@...> wrote:
Jared,

We have gotten our helium from USU lab gas sales on campus.
I think they get it from AirGas.



Kevin





On 8/6/17, 6:57 PM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:

Thanks again to those who helped with the balloon tracking and
recovery last weekend.

If everything comes together and if the weather cooperates, I'm hoping
to try my own launch this Saturday.

Kevin (or others), where do you source the helium from? Do you use the
standard industrial grade helium? Can I just walk into AirGas and get
what I need?

I'm going to float 1 (or maybe 2, depending on my final payload
weight) X 36" mylar balloons. The helium requirement is around 3.5
cubic feet each. So I should be able to do 2 or 3 launches with a Size
20 (20 cubic feet) cylinder.

I'm also designing a new PCB that will act as a shield for the Arduino
Mini. It will have the GPS, transmitter, and charge controller all on
one board and will mate directly with the Arduino via headers - thus
nearly eliminating my need for wires - and greatly reducing the total
payload weight.

I'll keep you apprised of launch details.

Thanks,

Jared






Re: Balloon launch this Saturday? Helium?

Jared Smith
 

Nope. I didn't have any details on launch time or location. I think
their plan was good, but just bad luck on the landing site.

It's still transmitting, so that's a good sign. Hopefully they can get
with someone at the city and retrieve it. A fishing pole with a big
hook might be necessary.

Jared

On Wed, Aug 9, 2017 at 10:59 AM, Kevin Reeve <kevin.reeve@...> wrote:
Did you run any predictions?

Sent from my iPhone

On Aug 9, 2017, at 10:53 AM, Jared Smith <jared@...> wrote:

Oh no! It landed in the retention ponds West of town! Hopefully it
floats and they can retrieve it without too much damage. We'll see if
it continues to beacon.

Jared

On Wed, Aug 9, 2017 at 10:06 AM, Kevin Reeve <kevin.reeve@...> wrote:
This one has some excellent climbing skills. Doing great!

Kevin





On 8/9/17, 9:36 AM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:

The GAS team balloon is in the air. It's ERRNO-6. Currently at 48,000
approaching Logan from the West. We should be able to see it... even
through the smoke.

Jared

On Tue, Aug 8, 2017 at 4:21 PM, Jared Smith <jared@...> wrote:
Thanks Kevin. I'll check with AirGas and see what they can provide.

I'm not sure if I'll be able to get a payload fully together by
Saturday, but I'm going to try because the forecast looks good. I have
to launch when it's very clear. I also have to account for downwind
storms to try to avoid high altitude thunderstorms. With a neck lift
of only 2-3 grams (about the weight of a dime) if the balloon passes
through any clouds it will pick up enough condensation to bring it
down.

The USU GAS team is planning a launch tomorrow (Wednesday) with the
payload for the Japanese students. I'm not sure of specifics (date,
location, etc.), but they want to fully support it themselves - which
I think is wonderful (and I'll cross my fingers for their success).
But you may want to monitor APRS or HabHub. I believe the call will be
ERRNO-1.

Jared


On Sun, Aug 6, 2017 at 7:04 PM, Kevin Reeve <kevin.reeve@...> wrote:
Jared,

We have gotten our helium from USU lab gas sales on campus.
I think they get it from AirGas.



Kevin





On 8/6/17, 6:57 PM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:

Thanks again to those who helped with the balloon tracking and
recovery last weekend.

If everything comes together and if the weather cooperates, I'm hoping
to try my own launch this Saturday.

Kevin (or others), where do you source the helium from? Do you use the
standard industrial grade helium? Can I just walk into AirGas and get
what I need?

I'm going to float 1 (or maybe 2, depending on my final payload
weight) X 36" mylar balloons. The helium requirement is around 3.5
cubic feet each. So I should be able to do 2 or 3 launches with a Size
20 (20 cubic feet) cylinder.

I'm also designing a new PCB that will act as a shield for the Arduino
Mini. It will have the GPS, transmitter, and charge controller all on
one board and will mate directly with the Arduino via headers - thus
nearly eliminating my need for wires - and greatly reducing the total
payload weight.

I'll keep you apprised of launch details.

Thanks,

Jared







Re: Balloon launch this Saturday? Helium?

Jared Smith
 

The payload has been recovered from the sewage retention ponds.
Fortunately it landed in a cleaner pond. No word yet on payload
damage.

It appears that the balloons I ordered will not arrive by Saturday, so
I'm now looking at a launch early next week or a week from Saturday.

Jared

On Wed, Aug 9, 2017 at 11:03 AM, Jared Smith <jared@...> wrote:
Nope. I didn't have any details on launch time or location. I think
their plan was good, but just bad luck on the landing site.

It's still transmitting, so that's a good sign. Hopefully they can get
with someone at the city and retrieve it. A fishing pole with a big
hook might be necessary.

Jared


On Wed, Aug 9, 2017 at 10:59 AM, Kevin Reeve <kevin.reeve@...> wrote:
Did you run any predictions?

Sent from my iPhone

On Aug 9, 2017, at 10:53 AM, Jared Smith <jared@...> wrote:

Oh no! It landed in the retention ponds West of town! Hopefully it
floats and they can retrieve it without too much damage. We'll see if
it continues to beacon.

Jared

On Wed, Aug 9, 2017 at 10:06 AM, Kevin Reeve <kevin.reeve@...> wrote:
This one has some excellent climbing skills. Doing great!

Kevin





On 8/9/17, 9:36 AM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:

The GAS team balloon is in the air. It's ERRNO-6. Currently at 48,000
approaching Logan from the West. We should be able to see it... even
through the smoke.

Jared

On Tue, Aug 8, 2017 at 4:21 PM, Jared Smith <jared@...> wrote:
Thanks Kevin. I'll check with AirGas and see what they can provide.

I'm not sure if I'll be able to get a payload fully together by
Saturday, but I'm going to try because the forecast looks good. I have
to launch when it's very clear. I also have to account for downwind
storms to try to avoid high altitude thunderstorms. With a neck lift
of only 2-3 grams (about the weight of a dime) if the balloon passes
through any clouds it will pick up enough condensation to bring it
down.

The USU GAS team is planning a launch tomorrow (Wednesday) with the
payload for the Japanese students. I'm not sure of specifics (date,
location, etc.), but they want to fully support it themselves - which
I think is wonderful (and I'll cross my fingers for their success).
But you may want to monitor APRS or HabHub. I believe the call will be
ERRNO-1.

Jared


On Sun, Aug 6, 2017 at 7:04 PM, Kevin Reeve <kevin.reeve@...> wrote:
Jared,

We have gotten our helium from USU lab gas sales on campus.
I think they get it from AirGas.



Kevin





On 8/6/17, 6:57 PM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:

Thanks again to those who helped with the balloon tracking and
recovery last weekend.

If everything comes together and if the weather cooperates, I'm hoping
to try my own launch this Saturday.

Kevin (or others), where do you source the helium from? Do you use the
standard industrial grade helium? Can I just walk into AirGas and get
what I need?

I'm going to float 1 (or maybe 2, depending on my final payload
weight) X 36" mylar balloons. The helium requirement is around 3.5
cubic feet each. So I should be able to do 2 or 3 launches with a Size
20 (20 cubic feet) cylinder.

I'm also designing a new PCB that will act as a shield for the Arduino
Mini. It will have the GPS, transmitter, and charge controller all on
one board and will mate directly with the Arduino via headers - thus
nearly eliminating my need for wires - and greatly reducing the total
payload weight.

I'll keep you apprised of launch details.

Thanks,

Jared







Re: Balloon launch this Saturday? Helium?

Tyler Griffiths
 

Just an observation...
There looked to be one of the retrival team that was using a TH-D72 with the callsign of GDHILL.
No other identifier...




Tyler Griffiths
N7UWX

See where I am:
http://goo.gl/nC3m57

On Wed, Aug 9, 2017 at 1:21 PM, Jared Smith <jared@...> wrote:
The payload has been recovered from the sewage retention ponds.
Fortunately it landed in a cleaner pond. No word yet on payload
damage.

It appears that the balloons I ordered will not arrive by Saturday, so
I'm now looking at a launch early next week or a week from Saturday.

Jared


On Wed, Aug 9, 2017 at 11:03 AM, Jared Smith <jared@...> wrote:
> Nope. I didn't have any details on launch time or location. I think
> their plan was good, but just bad luck on the landing site.
>
> It's still transmitting, so that's a good sign. Hopefully they can get
> with someone at the city and retrieve it. A fishing pole with a big
> hook might be necessary.
>
> Jared
>
>
> On Wed, Aug 9, 2017 at 10:59 AM, Kevin Reeve <kevin.reeve@...> wrote:
>> Did you run any predictions?
>>
>> Sent from my iPhone
>>
>>> On Aug 9, 2017, at 10:53 AM, Jared Smith <jared@...> wrote:
>>>
>>> Oh no! It landed in the retention ponds West of town! Hopefully it
>>> floats and they can retrieve it without too much damage. We'll see if
>>> it continues to beacon.
>>>
>>> Jared
>>>
>>>> On Wed, Aug 9, 2017 at 10:06 AM, Kevin Reeve <kevin.reeve@...> wrote:
>>>> This one has some excellent climbing skills.  Doing great!
>>>>
>>>> Kevin
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>> On 8/9/17, 9:36 AM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:
>>>>>
>>>>> The GAS team balloon is in the air. It's ERRNO-6. Currently at 48,000
>>>>> approaching Logan from the West. We should be able to see it... even
>>>>> through the smoke.
>>>>>
>>>>> Jared
>>>>>
>>>>>> On Tue, Aug 8, 2017 at 4:21 PM, Jared Smith <jared@...> wrote:
>>>>>> Thanks Kevin. I'll check with AirGas and see what they can provide.
>>>>>>
>>>>>> I'm not sure if I'll be able to get a payload fully together by
>>>>>> Saturday, but I'm going to try because the forecast looks good. I have
>>>>>> to launch when it's very clear. I also have to account for downwind
>>>>>> storms to try to avoid high altitude thunderstorms. With a neck lift
>>>>>> of only 2-3 grams (about the weight of a dime) if the balloon passes
>>>>>> through any clouds it will pick up enough condensation to bring it
>>>>>> down.
>>>>>>
>>>>>> The USU GAS team is planning a launch tomorrow (Wednesday) with the
>>>>>> payload for the Japanese students. I'm not sure of specifics (date,
>>>>>> location, etc.), but they want to fully support it themselves - which
>>>>>> I think is wonderful (and I'll cross my fingers for their success).
>>>>>> But you may want to monitor APRS or HabHub. I believe the call will be
>>>>>> ERRNO-1.
>>>>>>
>>>>>> Jared
>>>>>>
>>>>>>
>>>>>>> On Sun, Aug 6, 2017 at 7:04 PM, Kevin Reeve <kevin.reeve@...> wrote:
>>>>>>> Jared,
>>>>>>>
>>>>>>> We have gotten our helium from USU lab gas sales on campus.
>>>>>>> I think they get it from AirGas.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Kevin
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> On 8/6/17, 6:57 PM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:
>>>>>>>>
>>>>>>>> Thanks again to those who helped with the balloon tracking and
>>>>>>>> recovery last weekend.
>>>>>>>>
>>>>>>>> If everything comes together and if the weather cooperates, I'm hoping
>>>>>>>> to try my own launch this Saturday.
>>>>>>>>
>>>>>>>> Kevin (or others), where do you source the helium from? Do you use the
>>>>>>>> standard industrial grade helium? Can I just walk into AirGas and get
>>>>>>>> what I need?
>>>>>>>>
>>>>>>>> I'm going to float 1 (or maybe 2, depending on my final payload
>>>>>>>> weight) X 36" mylar balloons. The helium requirement is around 3.5
>>>>>>>> cubic feet each. So I should be able to do 2 or 3 launches with a Size
>>>>>>>> 20 (20 cubic feet) cylinder.
>>>>>>>>
>>>>>>>> I'm also designing a new PCB that will act as a shield for the Arduino
>>>>>>>> Mini. It will have the GPS, transmitter, and charge controller all on
>>>>>>>> one board and will mate directly with the Arduino via headers - thus
>>>>>>>> nearly eliminating my need for wires - and greatly reducing the total
>>>>>>>> payload weight.
>>>>>>>>
>>>>>>>> I'll keep you apprised of launch details.
>>>>>>>>
>>>>>>>> Thanks,
>>>>>>>>
>>>>>>>> Jared
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>>




Re: Balloon launch this Saturday? Helium?

Mitch Smith
 

Curious that the station icon is the same that Bob Bruninga has been using around Logan (WB4APR-7). A search on aprs.fi also shows a GDHILL-8 in Pennsylvania, at Governor Dick Hill, last beaconed on 15 July. The same day that Bob participated in the Appalachian Golden Packet Event from Governor Dick Hill. No identifier there either. Could he be the culprit? ;)


On Aug 9, 2017, at 13:23, Tyler Griffiths <tyler.griffiths@...> wrote:

Just an observation...
There looked to be one of the retrival team that was using a TH-D72 with the callsign of GDHILL.
No other identifier...




Tyler Griffiths
N7UWX

See where I am:
http://goo.gl/nC3m57

On Wed, Aug 9, 2017 at 1:21 PM, Jared Smith <jared@...> wrote:
The payload has been recovered from the sewage retention ponds.
Fortunately it landed in a cleaner pond. No word yet on payload
damage.

It appears that the balloons I ordered will not arrive by Saturday, so
I'm now looking at a launch early next week or a week from Saturday.

Jared


On Wed, Aug 9, 2017 at 11:03 AM, Jared Smith <jared@...> wrote:
> Nope. I didn't have any details on launch time or location. I think
> their plan was good, but just bad luck on the landing site.
>
> It's still transmitting, so that's a good sign. Hopefully they can get
> with someone at the city and retrieve it. A fishing pole with a big
> hook might be necessary.
>
> Jared
>
>
> On Wed, Aug 9, 2017 at 10:59 AM, Kevin Reeve <kevin.reeve@...> wrote:
>> Did you run any predictions?
>>
>> Sent from my iPhone
>>
>>> On Aug 9, 2017, at 10:53 AM, Jared Smith <jared@...> wrote:
>>>
>>> Oh no! It landed in the retention ponds West of town! Hopefully it
>>> floats and they can retrieve it without too much damage. We'll see if
>>> it continues to beacon.
>>>
>>> Jared
>>>
>>>> On Wed, Aug 9, 2017 at 10:06 AM, Kevin Reeve <kevin.reeve@...> wrote:
>>>> This one has some excellent climbing skills.  Doing great!
>>>>
>>>> Kevin
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>> On 8/9/17, 9:36 AM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:
>>>>>
>>>>> The GAS team balloon is in the air. It's ERRNO-6. Currently at 48,000
>>>>> approaching Logan from the West. We should be able to see it... even
>>>>> through the smoke.
>>>>>
>>>>> Jared
>>>>>
>>>>>> On Tue, Aug 8, 2017 at 4:21 PM, Jared Smith <jared@...> wrote:
>>>>>> Thanks Kevin. I'll check with AirGas and see what they can provide.
>>>>>>
>>>>>> I'm not sure if I'll be able to get a payload fully together by
>>>>>> Saturday, but I'm going to try because the forecast looks good. I have
>>>>>> to launch when it's very clear. I also have to account for downwind
>>>>>> storms to try to avoid high altitude thunderstorms. With a neck lift
>>>>>> of only 2-3 grams (about the weight of a dime) if the balloon passes
>>>>>> through any clouds it will pick up enough condensation to bring it
>>>>>> down.
>>>>>>
>>>>>> The USU GAS team is planning a launch tomorrow (Wednesday) with the
>>>>>> payload for the Japanese students. I'm not sure of specifics (date,
>>>>>> location, etc.), but they want to fully support it themselves - which
>>>>>> I think is wonderful (and I'll cross my fingers for their success).
>>>>>> But you may want to monitor APRS or HabHub. I believe the call will be
>>>>>> ERRNO-1.
>>>>>>
>>>>>> Jared
>>>>>>
>>>>>>
>>>>>>> On Sun, Aug 6, 2017 at 7:04 PM, Kevin Reeve <kevin.reeve@...> wrote:
>>>>>>> Jared,
>>>>>>>
>>>>>>> We have gotten our helium from USU lab gas sales on campus.
>>>>>>> I think they get it from AirGas.
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Kevin
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> On 8/6/17, 6:57 PM, "BARC-HAB@groups.io on behalf of Jared Smith" <BARC-HAB@groups.io on behalf of jared@...> wrote:
>>>>>>>>
>>>>>>>> Thanks again to those who helped with the balloon tracking and
>>>>>>>> recovery last weekend.
>>>>>>>>
>>>>>>>> If everything comes together and if the weather cooperates, I'm hoping
>>>>>>>> to try my own launch this Saturday.
>>>>>>>>
>>>>>>>> Kevin (or others), where do you source the helium from? Do you use the
>>>>>>>> standard industrial grade helium? Can I just walk into AirGas and get
>>>>>>>> what I need?
>>>>>>>>
>>>>>>>> I'm going to float 1 (or maybe 2, depending on my final payload
>>>>>>>> weight) X 36" mylar balloons. The helium requirement is around 3.5
>>>>>>>> cubic feet each. So I should be able to do 2 or 3 launches with a Size
>>>>>>>> 20 (20 cubic feet) cylinder.
>>>>>>>>
>>>>>>>> I'm also designing a new PCB that will act as a shield for the Arduino
>>>>>>>> Mini. It will have the GPS, transmitter, and charge controller all on
>>>>>>>> one board and will mate directly with the Arduino via headers - thus
>>>>>>>> nearly eliminating my need for wires - and greatly reducing the total
>>>>>>>> payload weight.
>>>>>>>>
>>>>>>>> I'll keep you apprised of launch details.
>>>>>>>>
>>>>>>>> Thanks,
>>>>>>>>
>>>>>>>> Jared
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>>




New HAB PCB

Jared Smith
 

I finally finished the design of my new PCB. It houses the GPS, charge
controller, and transmitter. This will function as a shield that will
mount directly to the Arduino Pro Mini via pin headers, thus
eliminating all wires (except to the solar panels) and decreasing the
weight quite a bit - to maybe 12 grams total.

The Arduino and this PCB will sit back to back. The PCB is the same
width as the Mini, but twice as long. The GPS, connectors for the
tether, and antenna counterpoise connector are at the top, and the
transmitter and antenna radiator connector are at the bottom. The
charge controller stuff is in the middle of the PCB.

There are high odds that something won't work. The PCB design's a bit
sloppy. But I'm to the point where I had to order boards to start
testing. They should be here in ~3 weeks.

The schematic and renders of the PCB front and back are attached.
Feedback or comments are very welcome.

I'm planning to launch a balloon with my previous design this Saturday
if the weather is suitable.

Jared

Re: New HAB PCB

Jared Smith
 

The new PCBs are here. Photo attached. With the exception of the 2
small solar cells, antenna, and PCB components, this will be
everything for the payload. I've no idea yet if it will work - I have
a lot of find soldering to do before then. But I've already discovered
a minor issue you might be able to help with.

I'm not sure if I sized them wrong or if this drill holes for this fab
house are too small, but the holes for the header pins are too small.
My header pins won't fit through them, so I can't readily mount this
to the Arduino. You can see in the photo that the holes across the top
of my board are smaller than the Arduino ones. They shouldn't be - I
used the official Arduino cad files for the sizing, but something went
awry. Grrr!

Is anyone aware of thinner gauge pin headers that might work? My other
options seem to be grinding down some standard header pins to fit - or
cutting the male ends off of jumper wires and fashioning my own. Any
ideas?

I'll start soldering tomorrow.

Thanks,

Jared

On Sun, Aug 27, 2017 at 11:15 PM, Jared Smith <jared@...> wrote:
I finally finished the design of my new PCB. It houses the GPS, charge
controller, and transmitter. This will function as a shield that will
mount directly to the Arduino Pro Mini via pin headers, thus
eliminating all wires (except to the solar panels) and decreasing the
weight quite a bit - to maybe 12 grams total.

The Arduino and this PCB will sit back to back. The PCB is the same
width as the Mini, but twice as long. The GPS, connectors for the
tether, and antenna counterpoise connector are at the top, and the
transmitter and antenna radiator connector are at the bottom. The
charge controller stuff is in the middle of the PCB.

There are high odds that something won't work. The PCB design's a bit
sloppy. But I'm to the point where I had to order boards to start
testing. They should be here in ~3 weeks.

The schematic and renders of the PCB front and back are attached.
Feedback or comments are very welcome.

I'm planning to launch a balloon with my previous design this Saturday
if the weather is suitable.

Jared

Re: New HAB PCB

Bob Wood
 

Grinding the pins would frustrate you a bin as they are already small. Since you only have a few Arduino connections the best route would be wire wrap gauge jumpers.

Bob WA7MXZ

Sent from my iPhone

On Sep 11, 2017, at 7:44 PM, Jared Smith <jared@...> wrote:

The new PCBs are here. Photo attached. With the exception of the 2
small solar cells, antenna, and PCB components, this will be
everything for the payload. I've no idea yet if it will work - I have
a lot of find soldering to do before then. But I've already discovered
a minor issue you might be able to help with.

I'm not sure if I sized them wrong or if this drill holes for this fab
house are too small, but the holes for the header pins are too small.
My header pins won't fit through them, so I can't readily mount this
to the Arduino. You can see in the photo that the holes across the top
of my board are smaller than the Arduino ones. They shouldn't be - I
used the official Arduino cad files for the sizing, but something went
awry. Grrr!

Is anyone aware of thinner gauge pin headers that might work? My other
options seem to be grinding down some standard header pins to fit - or
cutting the male ends off of jumper wires and fashioning my own. Any
ideas?

I'll start soldering tomorrow.

Thanks,

Jared


On Sun, Aug 27, 2017 at 11:15 PM, Jared Smith <jared@...> wrote:
I finally finished the design of my new PCB. It houses the GPS, charge
controller, and transmitter. This will function as a shield that will
mount directly to the Arduino Pro Mini via pin headers, thus
eliminating all wires (except to the solar panels) and decreasing the
weight quite a bit - to maybe 12 grams total.

The Arduino and this PCB will sit back to back. The PCB is the same
width as the Mini, but twice as long. The GPS, connectors for the
tether, and antenna counterpoise connector are at the top, and the
transmitter and antenna radiator connector are at the bottom. The
charge controller stuff is in the middle of the PCB.

There are high odds that something won't work. The PCB design's a bit
sloppy. But I'm to the point where I had to order boards to start
testing. They should be here in ~3 weeks.

The schematic and renders of the PCB front and back are attached.
Feedback or comments are very welcome.

I'm planning to launch a balloon with my previous design this Saturday
if the weather is suitable.

Jared


<PicoPCB.jpg>

Re: New HAB PCB

Jared Smith
 

Bob -

Yeah, I agree that trying to grind/sand them down will be a major
pain. There are 10 header pins between the Arduino and my PCB shield.
If it's not clear from the photo, they'll mate back-to-back.

I think I'll try cutting the male ends off of jumper wires. They're
just a bit thinner than the header pins, but thin enough to fit though
the holes. I'll put them through the standard plastic header spacers
to provide the stand-off. I think that should work, at least until I
can get another order of PCBs here. I've already fixed this and a few
other minor spacing issues.

Thanks,

Jared

On Mon, Sep 11, 2017 at 9:45 PM, Bob Wood <wa7mxz@...> wrote:
Grinding the pins would frustrate you a bin as they are already small. Since you only have a few Arduino connections the best route would be wire wrap gauge jumpers.

Bob WA7MXZ

Sent from my iPhone

On Sep 11, 2017, at 7:44 PM, Jared Smith <jared@...> wrote:

The new PCBs are here. Photo attached. With the exception of the 2
small solar cells, antenna, and PCB components, this will be
everything for the payload. I've no idea yet if it will work - I have
a lot of find soldering to do before then. But I've already discovered
a minor issue you might be able to help with.

I'm not sure if I sized them wrong or if this drill holes for this fab
house are too small, but the holes for the header pins are too small.
My header pins won't fit through them, so I can't readily mount this
to the Arduino. You can see in the photo that the holes across the top
of my board are smaller than the Arduino ones. They shouldn't be - I
used the official Arduino cad files for the sizing, but something went
awry. Grrr!

Is anyone aware of thinner gauge pin headers that might work? My other
options seem to be grinding down some standard header pins to fit - or
cutting the male ends off of jumper wires and fashioning my own. Any
ideas?

I'll start soldering tomorrow.

Thanks,

Jared


On Sun, Aug 27, 2017 at 11:15 PM, Jared Smith <jared@...> wrote:
I finally finished the design of my new PCB. It houses the GPS, charge
controller, and transmitter. This will function as a shield that will
mount directly to the Arduino Pro Mini via pin headers, thus
eliminating all wires (except to the solar panels) and decreasing the
weight quite a bit - to maybe 12 grams total.

The Arduino and this PCB will sit back to back. The PCB is the same
width as the Mini, but twice as long. The GPS, connectors for the
tether, and antenna counterpoise connector are at the top, and the
transmitter and antenna radiator connector are at the bottom. The
charge controller stuff is in the middle of the PCB.

There are high odds that something won't work. The PCB design's a bit
sloppy. But I'm to the point where I had to order boards to start
testing. They should be here in ~3 weeks.

The schematic and renders of the PCB front and back are attached.
Feedback or comments are very welcome.

I'm planning to launch a balloon with my previous design this Saturday
if the weather is suitable.

Jared


<PicoPCB.jpg>

Re: New HAB PCB

Bob Wood
 

That looks like the way to go...

Sent from my iPhone

On Sep 11, 2017, at 9:09 PM, Jared Smith <jared@...> wrote:

Bob -

Yeah, I agree that trying to grind/sand them down will be a major
pain. There are 10 header pins between the Arduino and my PCB shield.
If it's not clear from the photo, they'll mate back-to-back.

I think I'll try cutting the male ends off of jumper wires. They're
just a bit thinner than the header pins, but thin enough to fit though
the holes. I'll put them through the standard plastic header spacers
to provide the stand-off. I think that should work, at least until I
can get another order of PCBs here. I've already fixed this and a few
other minor spacing issues.

Thanks,

Jared

On Mon, Sep 11, 2017 at 9:45 PM, Bob Wood <wa7mxz@...> wrote:
Grinding the pins would frustrate you a bin as they are already small. Since you only have a few Arduino connections the best route would be wire wrap gauge jumpers.

Bob WA7MXZ

Sent from my iPhone

On Sep 11, 2017, at 7:44 PM, Jared Smith <jared@...> wrote:

The new PCBs are here. Photo attached. With the exception of the 2
small solar cells, antenna, and PCB components, this will be
everything for the payload. I've no idea yet if it will work - I have
a lot of find soldering to do before then. But I've already discovered
a minor issue you might be able to help with.

I'm not sure if I sized them wrong or if this drill holes for this fab
house are too small, but the holes for the header pins are too small.
My header pins won't fit through them, so I can't readily mount this
to the Arduino. You can see in the photo that the holes across the top
of my board are smaller than the Arduino ones. They shouldn't be - I
used the official Arduino cad files for the sizing, but something went
awry. Grrr!

Is anyone aware of thinner gauge pin headers that might work? My other
options seem to be grinding down some standard header pins to fit - or
cutting the male ends off of jumper wires and fashioning my own. Any
ideas?

I'll start soldering tomorrow.

Thanks,

Jared


On Sun, Aug 27, 2017 at 11:15 PM, Jared Smith <jared@...> wrote:
I finally finished the design of my new PCB. It houses the GPS, charge
controller, and transmitter. This will function as a shield that will
mount directly to the Arduino Pro Mini via pin headers, thus
eliminating all wires (except to the solar panels) and decreasing the
weight quite a bit - to maybe 12 grams total.

The Arduino and this PCB will sit back to back. The PCB is the same
width as the Mini, but twice as long. The GPS, connectors for the
tether, and antenna counterpoise connector are at the top, and the
transmitter and antenna radiator connector are at the bottom. The
charge controller stuff is in the middle of the PCB.

There are high odds that something won't work. The PCB design's a bit
sloppy. But I'm to the point where I had to order boards to start
testing. They should be here in ~3 weeks.

The schematic and renders of the PCB front and back are attached.
Feedback or comments are very welcome.

I'm planning to launch a balloon with my previous design this Saturday
if the weather is suitable.

Jared


<PicoPCB.jpg>


Upcoming balloon launch

Jared Smith
 

Hey all! This list has been pretty dormant of late, but Kevin and I
wanted to let you know of an upcoming balloon activity and launch.
This is primarily for hams and their children who have participated in
previous balloon activities, but we'd love to have feedback, helper,
balloon trackers, etc. participate.

We're planning a few meetings for the kids to prep the payload and
learn some skills over the next several weeks (first meeting next
Thursday), with launch planned for Saturday, June 15.

We're going to be flying our standard APRS and fox beacon
transmitters, with a couple HD cameras, but will also fly a LORA
transmitter sending real-time telemetry on 900mhz. We'll be building
self-enclosed LORA receivers for the kids to track and monitor the
payload during the chase. If you'd like the Arduino-based LORA kit
(which will require some assembly, soldering, etc.), let us know ASAP.
Pricing will be somewhere around $50.

Cheers,

Jared (N7SMI)