Hi,
I am currently testing out a couple of different options on sensors and DIY solutions for my home assistant setup and now want to finalize my server side of the setup. I am currently using a PI 3 with Hassbian, it is in the official case with a 2.5amp power supply. What I was thinking of doing is using an old ITX case with a ATX power supply to power the hass server and add another pi in it run a media server with a couple of HDD. (All powered by the ATX PSU). When testing the PI on a bench ATX PSU I built the PI’s lower power warning lightning bolt flashed from time to time on the screen… (This could just be because I used an old cheap USB cable though?)
Has anybody else has issues using a ATX PSU to power the PI 3’s with HASS?
If I only run hassbian on a PI 3 connected via Ethernet headless, what is the minimum power requirements?
How exactly is the ATX PSU wired to the Pi? The Pi would draw max 15W of power, and most likely way less than that, most ATX PSU’s are 200W+, so there is no chance you are overloading it. Are you just taking the raw 5V leads from the ATX and connecting them to a USB cable somehow?
My guess would be that the 5V being provided isn’t completely stable and the Pi is seeing low voltage. What I would do, since I have the hardware already, is use a regulated DC to DC supply in between. I have a couple of cheap boards that take I think 3-18V DC in and output variable voltage based on a pot. I adjust the pot to send a bit over 5V, and everything is happy. Or you just live with the odd lightning bolt. As for minimum power requirements, I’m sure it varies, but I bet your issue is volts not amps.