I will try to help. I am mobile right now and will elaborate when I get home. -- Rich Gordon k0eb

Hello Ron, Thank you for the information about used fans. I was mistaken about the brand of active cooling case I use. They look very similar upon first glance. I'm actually using this

I've uploaded a new set of QtSoundModem files, including source. Recent changes are: Add option to run modems in separate threads. This may be an advantage when running on a Pi3 or

Tadd et al, Try this https://www.amazon.com/gp/aw/d/B07V7YY5X6?psc=1&ref=ppx_pop_mob_b_asin_title They come in 10A and 15A versions. Also

I agree. 5.1 may be too low. 5.0 is very low for.a Raspberry pI 4B

$0.02 worth of comment. I'd suggest that the output should be adjustable to near 5.2V (the USB spec allows for 5.25V) to compensate for USB power cable loss. My RPi4 is powered from a

Had one ham take his board and hat and wrap their plastic case in foil and it helped. -- John D. Hays Kingston, WA K7VE

Finally found the link for the ones we got. Used for both running 12V fans on our 3D printer, replacing the noisy 24 vdc OEM ones. And for providing 5 vdc to run my RPi 3B from 12 vdc battery.

The one thing I haven't had much luck on is finding metal cases that support expansion to support one or two or three HATs, WITH a fan. To me, something like this really needs a

Thanks, John. The ! worked. -- Bill AA6BD

I picked up a pack of 4 adjustable 5A Buck converters off Amazon for 14 bucks 12v in, adjusted the output to 5.2V. One I ran a USB-C cable from it to the Pi4 for power, the other 3 I ran the buck

Is anyone able and willing to help guide me? Ed, KD9FRQ

They are definitely all not equal. I have one now running a 4B with no under voltage alerts for months. There are lots of little, cheap, USB voltage and current monitors that are available. Plug

Here is a link to the 12v to 5v converters that I use. I like the water resistant varieties. I use them on our boat for navigation computer on a pi. This converter terminates in a USB jack on

I’m sharing this because this email reflector has been a great source of ideas. Also, the more I tell people about it the more egg I get in my face if I don’t follow through, and I want to

Oh.. this is an important detail Ron. Thank you. I was curious how anyone could build a large heat sink and two fans for $10! They must be using very cheap sleeve-type fans. For me

Alas they do not do what the Raspberry PI 4B calls for. So far I’ve not had one go wrong for 5v needs.

Right, the CPT modules work pretty good. Mark KD0QYN

i had good results for anything that needs 5v with these black power modules

Indeed. $140 is a non-starter. It would be idea to be able to fully discharge the battery once in a while with a constant current load while watching the voltage. This could give us the true