Date   
Re: Nextion Display issues

the.chaotician@...
 

Now that I have the sizing issue sorted, I have come across another issue my Nextion doesn't seem to be communicating with the Raduino, I have tried re-flashing it with the precompiled hex file from the KD8CEC website, and I have tried flashing from the Arduino dev environment several times. I have also tried a couple of the different precompiled .tft files from these forums, all with the same result, using the Raduino encoder alters the tuning of the uBitX, but no change is registered on the Nextion. Likewise, I can operate the Nextion and nothing changes on the uBitX. 

I am wondering, is there any way the serial link between the Nextion and the Raduino could be screwed, am I missing some sort of Baud Rate setting somewhere in the Arduino Sketch?

I am quite confused, and when I work out how to fix these issues I am going to write myself a concise set of instructions for when I inevitably hack further at this frustrating little beastie. 

V6

Dave Dixon
 

Hello all,
               happy new year to you all...my Version 6 arrived this morning16 days from india normal mail.I shall open it tonight.Any suggestions appreciated.Dave G0AYD.

rotary encoder not functioning

dave
 

my ubitx v5 has stopped tuning or responding to the r/ encoder i am using the indiakits case set from Sunil   (very nice case) case and boards. i would like to check that i have connected it correctly but i can not find a diagram , it was working ok until i had to move the encoder  to fit the tx/rx led i think i may have damaged it or connected it incorrectly what are the colours and conections to the board a the encoder or has anyone a picture of the wiring of the 4 pin connectors dave c   gw0nvf

Re: Nextion Display issues

Ted
 

Heres another variation, showing the frequency a little differently.


microbitx issue4 circuit diagram

fred.aunger@...
 

Im trying to find the circuit diagram for my  microbitx issue 4 board. Any help with this would be appreciated
Fred Aunger (G6FJA)

Re: Nextion Display issues

Ted
 

The 3.5 screens dated 4/30/19 and 5/1/19 were a minor collaboration between a few of us here, Sam Tedesco primarily and self learning something along the way. Many elements were changed using a simple spreadsheet to scale the pixel width and height of each graphic element from a 2.8 to a 3.5 size (followed by manual entry per element into the Nextion Editor).  The background art were resized in a similar manner with Photoshop. Saving and compiling for a Basic or an Enhanced screen is a simple choice within the Editor.

It took a few motion pictures' length to do while mellowing, then some tweaking back and forth between theory and practise with the actual display.  I may have saved the work if anyone wants some leads on trying it with different size conversions.

73,

Ted
K3RTA

Re: Version 6 Arduino

Sascha, DK9SAS
 

Problem is that the Arduino IDE (I'm using 1.8.10) expects the project file (like abc_code.ino) to be in a folder called like the project itself (=project name without the extention .ino).

So just rename the folder the ubitx_v6.3.1_code.ino file resides in to 'ubitx_v6.3.1_code' and everything is fine.
No need to copy it anywhere special..

73 Sascha

Re: Manual for v5 #v5

 

The version is printed on the PCB as etching near the antenna connector!

Raj

At 02-01-20, you wrote:
I received a uBitx v5 (I think!) as a gift for Christmas. There was no documentation of any kind with it. Just a board and some parts in a plastic box. I find that a little strange, and in reading some of the older messages posted here, it appears that there should be an assembly manual. I believe it's v5 but I've got no way to identify it as the board does not have a version silk screened on it. I do not see any way to contact the manufacturer, and a google search sent me here for support.

I've very disappointed, and I'm just about ready to throw the whole thing in the trash. Should there be a manual, and if so how can I get it?

Re: ubitx #v6 Screen Speed Mod #v6

 

Jack, Farhan,

Would the NANO EVERY be faster ?

Raj


At 02-01-20, you wrote:
Reed,
I am travelling, can't wait to try this out!

- f

On Thu 2 Jan, 2020, 10:33 AM Reed N, < greenkid336600+groupsio@...> wrote:
I don't have my full radio built yet, but I have spent some time speeding up the screen refresh. The screen speed increases are due to the fabulous work done by Xark: https://github.com/XarkLabs/PDQ_GFX_Libs , so my contribution on that front are purely the integration into this project.

I intentionally kept the UI fairly similar to Ashhar's original release, however it's now much faster and easier to change colors, layout, etc.

NOTE: While I've tested the UI a fair amount, I have NOT actually run a radio with this. I'd definitely appreciate feedback if anybody is willing to give it a go on a fully built rig!

https://github.com/reedbn/ubitxv6/tree/pdq_gfx_update

If the current state looks good and is working on a full-up rig, I'll create a PR before tackling other code updates.


Reed

Re: Ideas for AM, NB FM Demod and CW filter board

g8tdu
 

I have also searched for IC's to add AM/FM and narrowed it down to the same TDA1220 IC you have. Ashhar suggested working from the 45Mhz IF frequency and this is one of the very few that will work with AM at 45Mhz

Re: Ideas for AM, NB FM Demod and CW filter board

g8tdu
 

It would still be a uBITX but with an add on board

Re: Ideas for AM, NB FM Demod and CW filter board

g8tdu
 

I have in fact created a FaceBook group to investigate the possibility of adding AM/FM to the uBITX and the older BITX. This group has attracted 120 members in less than 24 hours.!

I have had a few chats with Ashhar on this and he suggested using the IF frequency of 45Mhz. This limited the choice of IC's which would work at 45Mhz AM, the TDA1220 will work at this IF frequency. Kyocera make some nice 12.5Khz 6 pole filters which should work nicely with this IC.

In addition we also want to add CTCSS to the board for repeater use. Most of my VHF/UHF and above equipment is done via transverters, and i wanted FM especially for repeater use.

The new group dedicated to just this can be found here.... https://www.facebook.com/groups/2517941545160596/

Version 6 Arduino

Bob Bennett
 

I have the v6 and had up working fine (but for propagation). I tried to upload the latest sketch on Farhan’s site, but really need some guidance.

I put the ubitx_v6.3.1_code.ino in the sketch folder that when I verify it I get a fatal error that indicates that it is looking to include wire.h and EPROM.h.

Bob nz2z

--
Bob
NZ2Z

Re: ubitx #v6 Screen Speed Mod #v6

Reed N
 

I didn't see any phantom button presses in my test today, so it is one of:
a) an issue due to other code problems I was having in testing (lots of stack smash crashes early on)
b) an issue that only occurs sometimes
c) an issue that I only imagined

With two thumbs ups (N6ALT and NG1P), I'll make a PR, and take a look at setting save/restore next.

Reed

Re: IRF510 insulation question #v5

Jerry Gaffke
 

That 5.15 W/m*K means the grease is almost 6 times worse at conducting heat 
than your ceramic insulators, which were 29.3 W/m*K
.
But if that grease winds up being more than 6 times thinner than your 1 mm thick insulators,
the temperature drop across the grease will be less than that across the insulator.

Once you torque down the bolts holding the TO-220 IRF510 to your heatsink, 
that grease will be very thin indeed. 
I'd guess the grease will be more than 100 times thinner than your insulators.

I bet 99% of uBitx users just leave the IRF510 heatsinks as they found them.
No insulation (or grease) between the IRF510 and heatsink.
But they are careful not to have the two heatsinks touch each other
or anything else conductive such as a metal enclosure.

Jerry, KE7ER


On Thu, Jan 2, 2020 at 07:29 PM, Don - KM4UDX wrote:
Here is my thermal grease....5.15w/m.k
Is this stuff up for the job?

Re: No Thermal Compound #v6

Jerry Gaffke
 

I agree. 
Thermal grease is not needed for the uBitx.
On the IRF510, you would first run into trouble getting heat from die to tab.
Heat has not been a problem in normal use on the uBitx with the heatsinks provided. 

I hope my dive into thermal conductivity didn't leave folks thinking
this was something they needed to figure out.

Jerry


On Thu, Jan 2, 2020 at 07:19 PM, Ashhar Farhan wrote:
You won't need a thermal contact at these power dissipation levels. We have thousands of these working and we never reported a problem of insufficient heat transfer. On the other hand, the heatsinks themselves are insufficient over 10 watts of power. Larger heatsinks are tipping the cost of shipping over to the next slab!
- f

Re: IRF510 insulation question #v5

Don - KM4UDX
 

Jerry, many thanks for the walk through.  As normal, there is much more to everything than we think. Or at least I think.  So thanks a million (degrees C).

Re: IRF510 insulation question #v5

Don - KM4UDX
 

Here is my thermal grease....5.15w/m.k
Is this stuff up for the job?

Re: No Thermal Compound #v6

Ashhar Farhan
 

You won't need a thermal contact at these power dissipation levels. We have thousands of these working and we never reported a problem of insufficient heat transfer. On the other hand, the heatsinks themselves are insufficient over 10 watts of power. Larger heatsinks are tipping the cost of shipping over to the next slab!
- f

On Fri 3 Jan, 2020, 8:18 AM Bill, <groups191227@...> wrote:
My v6 finally arrived!  DHL found it somewhere and actually delivered this time, unlike last week!

It looks good and was packaged well.  All the parts are there with the exception of the notorious BNC nut (I have a spare).  Looking forward to building it!

While checking things out and planning the build, I did notice this:  There is no thermal compound between the IRF510s or the 7805 and their heat sinks.  I think it's a needed, so check yours before running it.

No problems with interference between pot RV3 and the amplifier heat sink some others have seen.


 - Bill KB3T

Re: ubitx #v6 Screen Speed Mod #v6

bill richardson
 

I tested and agree this is a great improvement. Thank you!

Bill ng1p


On Jan 2, 2020, at 12:03 AM, Reed N <greenkid336600+groupsio@...> wrote:

I don't have my full radio built yet, but I have spent some time speeding up the screen refresh. The screen speed increases are due to the fabulous work done by Xark: https://github.com/XarkLabs/PDQ_GFX_Libs , so my contribution on that front are purely the integration into this project.

I intentionally kept the UI fairly similar to Ashhar's original release, however it's now much faster and easier to change colors, layout, etc.

NOTE: While I've tested the UI a fair amount, I have NOT actually run a radio with this. I'd definitely appreciate feedback if anybody is willing to give it a go on a fully built rig!

https://github.com/reedbn/ubitxv6/tree/pdq_gfx_update

If the current state looks good and is working on a full-up rig, I'll create a PR before tackling other code updates.


Reed