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There's something like the 'law of unintended consequences'. You do one thing that makes sense and all sorts of things happen that you didn't expect. -- 73, Dan? NM3A

Brian, quick first question is what are you using for a power source? “Wall wart” supplies are notorious for not always being well filtered and can cause such issues. Ron

I just completed a new Progrock using the recommended power/regulator setup.? The voltages are correct, correct parts, no shorts on the boards, controller installed in the socket correctly. . It

Hi Fred I don't agree... When the pin is an output, the processor sets it at either 0V or 3.3V. Provided its current handling capability isn't abused, it doesn't matter what voltage it is "pulled up"

Interesting. I am reading that you should not have those pull-ups to 5V there at all if the pin is used as an output. The inputs have clamping diodes to clamp the 5v input to 3.3v. If anything having

Hi Evan. In my previous work life, I made use of the fact that most CPUs never go totally to 0.0 volts, they usually will be above zero and well under 0.5 volts. When I was trouble shooting a CPU or

Clickable: https://ae5x.blogspot.com/2021/11/spectrum-analysis-qdx-on-60m.html -- John AE5X

For those interested: https://ae5x.blogspot.com/2021/11/spectrum-analysis-qdx-on-60m.html -- John AE5X

Hi Matt, Have you measured your RF voltage at the output of T1 yet with your probe? The RF should be about the same as at the BS170’s, this is the junction of C32, C34, T1. C32 feeds the voltage

An additional note: RS232 logic "1" is a negative voltage, logic "0" is positive. TTL logic "1" is a positive voltage and logic "0" is 0 (or a very low positive voltage)---NORMALLY Milt W8NUE

I think it's the "just-in-time" inventory thought process that puzzles me as an economist the most. I can understand skimping on inventory during the Carter years when the prime interest rate was 21%,

He is actually the chief engineer. I was an engineering officer in the merchant navy and we were all more important than the captain and other deck officers. They were just the engineers "look outs"

I get this constant tone as well. Will hope for a fix even though the mini is still usable. 73 de Arnie W8DU

Reminds me of the joke about the gentleman who invested all his money in toilet paper and revolving doors. He was wiped out before he could turn around................ Lee KX4TT

A friend of mine is a Technical Marketing Engineer for Microchip for one of their uController lines. He has told me numerous times that every month they could sell twice what they produce and they are

Well, it reminds me of my favourite "Snatch" movie line... "Never underestimate the predictability of stupidity". 73 Hans G0UPL http://qrp-labs.com wrote:

Quite right. I try not to ascribe to conspiracy anything that could be the result of stupidity. I once saw a cartoon that was all too apt. “Be proud of your stupidity,” it said. “It’s what

Those who want to avoid playing Amazon roulette might want to try this West Virginia-based vendor. They sell a lot of these plugs to those who install alarm and CCTV systems and don’t want to lose

Hi Mike It is not just profit-driven. We have seen decades of a relentless drive to make everything cheaper. Profit = Revenue - costs. The consumer pushes revenue down and the manufacturer has to push

Thanks, Hans. ?I found the shipping confirmation email. ?Yahoo mail does some very odd things. 73, Ben ?K0IKR