Conversation
trini@floss.social

Tom Rini

Anyone here have a favorite "clever" way of controlling uart and power to an arbitrary SBC, for lab purposes?

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dougmerritt@mathstodon.xyz

DougMerritt (log😅 = 💧log😄)

Reply to @trini@floss.social

@trini I see you still haven't gotten an answer. I myself am not sure what you're asking; "lab power" usually just means a bench power supply, and although I've interfaced to uarts, I don't know what is a "clever" way.

If I'm the only one drawing a blank, ok, that's just me, but otherwise it conceivably could help to explain your question more? Maybe?

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trini@floss.social

Tom Rini

Reply to @dougmerritt@mathstodon.xyz

@dougmerritt Ah, good point. So I should perhaps have said "remote lab". A for-example problem is that if you take a Pi 4 the power connector is micro-USB but needs to be 5V/3A which is tricky to get reliably. A very unclever way to do all of this is with a remote controlled PSU like https://dlidirect.com/products/new-pro-switch and a hopefully good enough power adapter for the Pi itself. However, scaling that up to 8 boards takes a lot of physical space. I know some people have done things with relay controllers.

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khilman

Kevin Hilman

Reply to @trini@floss.social
Edited 5 months ago
@trini It's more cheap than clever, but I've used a few different types of USB relays over the years but bang-for-the-buck, this 16-channel relay for < $20 USD is hard to beat. I run 5V (and/or 12V) from an ATX PSU through these to a bunch of DUTs. It does require making some custom cabes, but these have been very reliable for me. -- https://www.sainsmart.com/collections/relays/products/16-channel-12v-relay-module
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