Anybody try using one of these? http://www.westmountainradio.com/product_info.php?products_id=rr_4004_c If the USB ports are quiet, it would be perfect for remote work. I have one but don’t

I second this one. Our packet radio group (tarpn.net) is designing a circuit based on this to replace the DROKing switcher we have been using. We’re going to put power resistors between a 14.2v

I use an LM338T. 5A, you can use it with any input voltage more than a couple volts above the desired output (and less than 36V). You need a couple of appropriate value resistors and a

I’m not seeing any noise from this https://powerwerx.com/usbbuddy-powerpole-usb-converter-device-charger -- Don W6CZ

Tom N1MM is using one of these to power a remote FreqEZ Band Decoder with its Pi-4 out at his tower. Advantage that it arrives with the Pi-4 connector on it. No reports of RFI from

Received from Chuck M via groups.io at 9/27/2020 00:02 UTC: Could work, but it's 3 amps MAXIMUM... and it can't be run without a load that approximates 10% of its rated output... meaning you need a

Received from Randon Loeb at 9/26/2020 23:54 UTC: Not really the best thing to do, but if you must then you will need balancing resistors that are sized according to the difference in voltage between

What baud rate are you using? It should be 19200. Mat

After trying a lot of options, I believe I know where the problem is: The TNC-Pi9k6. I finally got it to be accepted by YAAC as a serial device on /dev/ttyS0. But with YAAC, there was no

I've used these for both 24 to 12 and 12 to 5 volts, RPi 3B supply. Works well. Haven't tried it with the RPi 4B

Can one simply use two 7805s in parallel? I'm not familiar with 7805 that one but I know with other regulators it is sometimes possible, sometimes not (or at least not without some additional

I believe 7805 is a 1.5 amp regulator, raspberry pi 3 would need closer to 2 amps (3 amps recommended) if using usb accessories. Not saying it wont work, because it probably will, but keep in mind the

Followup: Thanks to all who replied. I had this thing lying around:https://www.amazon.com/gp/product/B07V27NG2N/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 And that with a usb cable with some

I configured the serial as suggested. I tried ls -l /dev/ser* and see lrwxrwxrwx 1 root root 7 Sep 24 11:09 /dev/serial0 -> ttyAMA0 lrwxrwxrwx 1 root root 5 Sep 24 11:09 /dev/serial1 -> ttyS0 when

USB-C connectors can carry quite a bit of power. Some laptops use them for the charging port. Part of the issue is the Pi itself. Granted, the USB spec states USB can supply 1.2A , but the Pi is

I'm running a USB-connected SDR and the two mini-fans that are part of the ventilated enclosure and that's all on a headless Pi 4.   To overcome endless throttling problems I have it connected to a

I haven’t had THAT happen yet. Our local social-media-over-ham-radio project has about 40 of this model. I can attest that the output voltage display isn’t accurate though, as bad as +/- 0.2.

Don't trust the voltage display on those. Several people on our reef-pi forums for aquarium controllers set the display to 5v, then powered up the pi with it and smoked the pi... One was putting 12v

Yep, depending on the pi. Pi 3B requires 2A, 4B+ pi foundation says 3.5A. add to that any USB devices and what they pull up to another amp, then you need a powered hub beyond that Get BlueMail for

A Raspberry PI 4B can only accept 3 amps on it’s USB-C connector. It does desire 5.1V though, not 5V. It’s tricky finding a 5.1V USB source that isn’t 110VAC powered. I have been using a