Date   
Re: an open message to those unhappy with the volume of messages #off_topic

David Lacey
 

Put money on it...his real name is NOAH :-)


On 10/05/2018 15:02, Jack Purdum via Groups.Io wrote:

Having said that, I can outdo you all.  When I started in data processing, we didn’t even have punch-cards.  We used rolls of papyrus with holes punched in by hand using a hammer and wooden stick.  All processing was done by slaves who sorted through the scrolls and tabulated results ….


I don't believe you...

Jack, W8TEE


Re: SWR

Kees T
 

As far as a quick and easy "Antenna Confirmation", I still like that little circuit Don, ND6T, came up with....and maybe others out there. Just a broadband noise generator and tune for the null with the receiver part of the Transceiver. No meters, no digital values to convert (which may or may not be correct) ....just a subjectively monitored "noise dip" as you tune the receiver while the noise generator is activated. If you are in the "dip", great, hit the PTT, ......if the dip is off frequency, just retune until it's on frequency. A bit different, a bit unusual, but very inexpensive and located under the covers of the UBITX with no Nano code change required. 

I've discussed installing it under the covers (vs externally) with Don and he tried it on his BITX-40 and says it works well. 

73 Kees K5BCQ

Re: SWR

Kees T
 

Bill,

Yes, that's much better ...MCP3202. Thanks !  I figure SPI is coming anyway because the little inexpensive (~$8) 2.8" TFTs are SPI and would make a great readout (and use existing 4 LCD pins on the Raduino interface ....hint,hint. The ones DuWayne used). 

73 Kees K5BCQ 

Re: SWR

K9HZ <bill@...>
 

As i recall from memory there are others in that series of MCP3xxx that have dual S&H and maybe 4 channels... and for some reason cheaper than the 3202?  Maybe 3204? (Working without datasheets here)


Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

 

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

 

Owner – Operator

Villa Grand Piton - J68HZ

Soufriere, St. Lucia W.I.

Rent it: www.VillaGrandPiton.com


email:  bill@...

 


On May 10, 2018, at 11:17 AM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:

Possible.

SPI interface, so 4 new Nano pins.    Could be OK if display goes to SPI.
Two channels but only one internal S/H.  However SPI is fast enough to ignore the lag between channels.


On Thu, May 10, 2018 at 09:06 am, K9HZ wrote:
I think the MCP 3202 is 12 bit w/ S&H and pretty cheap...

Re: SWR

Jack, W8TEE
 

We're also using SPI on the 5" and 7" displays.

Jack, W8TEE


On Thursday, May 10, 2018, 12:36:04 PM EDT, Kees T <windy10605@...> wrote:


Bill,

Yes, that's much better ...MCP3202. Thanks !  I figure SPI is coming anyway because the little inexpensive (~$8) 2.8" TFTs are SPI and would make a great readout (and use existing 4 LCD pins on the Raduino interface ....hint,hint. The ones DuWayne used). 

73 Kees K5BCQ 

Re: SWR

Kees T
 

DuWayne's note was    https://groups.io/g/BITX20/message/47837   

We need a better indexing to find "stuff" with 2000 messages per month. 

73 Kees K5BCQ

Re: SWR

Kees T
 

Might as well publish your "JackAl" FDIM presentation, Jack. We can all "proofread" it for you. 

73 Kees K5BCQ

Re: SWR

Jack, W8TEE
 

Actually, JackAl has very little to do with my FDIM presentation, which is on homebrewing. The JackAl board will be shown at the Show-and-Tell, which I think is Friday evening.

Jack, W8TEE


On Thursday, May 10, 2018, 12:47:18 PM EDT, Kees T <windy10605@...> wrote:


Might as well publish your "JackAl" FDIM presentation, Jack. We can all "proofread" it for you. 

73 Kees K5BCQ

Re: an open message to those unhappy with the volume of messages #off_topic

lou_w2row
 

My father worked at IBM during the days of core storage. I remember touring the Poughkeepsie plant and watching the cores being strung by hand under strong magnifying lenses and bright lights.

You could actually see a "bit" in those days.

Lou   W2ROW

Re: an open message to those unhappy with the volume of messages #off_topic

Jerry Gaffke
 

Had to look that one up:  transformer read only storage 

Now that's how a real programmer writes his code.
None of this sissy IDE stuff.

In the rope format,  it was TROS in the Apollo guidance computers.
    https://en.wikipedia.org/wiki/Apollo_Guidance_Computer

Not that I was there.

Jerry


On Thu, May 10, 2018 at 08:02 am, Kees T wrote:
punched some new TROS tapes myself.

Re: SWR

Kees T
 

You could also use 2x MCP3221 parts with an I2C interface and you would have 2x S/H,12 bits and 2x SOT-23 package for even fewer $

73 Kees K5BCQ.

Re: Coding styles

James Lynes
 

Great book!

As an engineering intern in 1973, I worked on a fire and security system that included DG Nova serial #4.

One of my mentors later moved on to DG at Research Triangle Park to work on the MV/8000 rival design team.

James

DG Nova, SuperNova, Nova II, Eclipse S/250; Honeywell DDP-516, Lockheed Electronics LEC-16(favorite), DEC PDP-8, PDP-11, PDP-12, VAX 11-750, Alpha; HP 1000; Intel 8080, 8085, 8748, 8749; Motorola 6809, 68000; Zilog Z-80; chipKIT UNO32; et. al.

Re: SWR

Jerry Gaffke
 

I don't think that's a win.
The only way to tell the S/H to take a sample is to communicate via the i2c bus.

I suppose you could have two i2c buses, drive them simultaneously when taking a sample,
then read them out individually.  But this is getting messy.
 


On Thu, May 10, 2018 at 10:05 am, Kees T wrote:
You could also use 2x MCP3221 parts with an I2C interface and you would have 2x S/H,12 bits and 2x SOT-23 package for even fewer $

Re: New RF AGC modification #ubitx

KE6BB
 

Thanks, Don.  That clarified it.
-----
Mark,
KE6BB

best way to solder ISP header pins to NANO board? #nano #arduino

freefuel@...
 

what is the best way to solder the ISP header pins to the NANO without having to remove it from the Raduino board?  I want to back a backup copy of the firmware already on my Raduino bard before I attempt to update it. 

-Justin N2TOH 

Re: Enclosure

KM4TRT
 

Do not despair,
I ordered March 24th and got word from DHL that it  will be here Monday May 14
ANG KM4TRT

Re: SWR

K9HZ <bill@...>
 

Yeah thats the one i was thinking of...


Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

 

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

 

Owner – Operator

Villa Grand Piton - J68HZ

Soufriere, St. Lucia W.I.

Rent it: www.VillaGrandPiton.com


email:  bill@...

 


On May 10, 2018, at 12:05 PM, Kees T <windy10605@...> wrote:

You could also use 2x MCP3221 parts with an I2C interface and you would have 2x S/H,12 bits and 2x SOT-23 package for even fewer $

73 Kees K5BCQ.

Re: SWR

K9HZ <bill@...>
 

There is a trick i use for this.  I stack all of the S/H enables on one bus (one processor pin and it can be multiplexed with a whole host of other events). Then you have all of your samples taken at the same time.  Then i casually go read the S/H signals and resolve them using a muxed A/D. Build the data and display it when its all together.  It works quite nicely this way.  


Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ

 

Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

 

Owner – Operator

Villa Grand Piton - J68HZ

Soufriere, St. Lucia W.I.

Rent it: www.VillaGrandPiton.com


email:  bill@...

 


On May 10, 2018, at 12:17 PM, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:

I don't think that's a win.
The only way to tell the S/H to take a sample is to communicate via the i2c bus.

I suppose you could have two i2c buses, drive them simultaneously when taking a sample,
then read them out individually.  But this is getting messy.
 

On Thu, May 10, 2018 at 10:05 am, Kees T wrote:
You could also use 2x MCP3221 parts with an I2C interface and you would have 2x S/H,12 bits and 2x SOT-23 package for even fewer $

Re: an open message to those unhappy with the volume of messages #off_topic

Jack, W8TEE
 

"None of this sissy IDE stuff."

What? I think IDE's make life easier. Those who want to use discrete editors, compilers, assemblers, and linkers are welcome to it. I prefer to be a sissy.

Jack, W8TEE


On Thursday, May 10, 2018, 12:59:17 PM EDT, Jerry Gaffke via Groups.Io <jgaffke@...> wrote:


Had to look that one up:  transformer read only storage 

Now that's how a real programmer writes his code.
None of this sissy IDE stuff.

In the rope format,  it was TROS in the Apollo guidance computers.
    https://en.wikipedia.org/wiki/Apollo_Guidance_Computer

Not that I was there.

Jerry


On Thu, May 10, 2018 at 08:02 am, Kees T wrote:
punched some new TROS tapes myself.

Re: an open message to those unhappy with the volume of messages #off_topic

Jerry Gaffke
 

Ah, you clearly missed the point.
All those editors and compilers and stuff are sissy too.

They were hand coding binary bits into those transformers.
Got us to the moon!
Haven't been back since.    ;-)

I've often heard from people who insist on coding in assembly, though not so much anymore.
And vaguely recall somebody advocating machine code as the way to go if you want to keep it really tight.
I very seldom find any reason to use anything less than C, even on small machines.

Jerry


On Thu, May 10, 2018 at 11:14 am, Jack Purdum wrote:
What? I think IDE's make life easier. Those who want to use discrete editors, compilers, assemblers, and linkers are welcome to it. I prefer to be a sissy.