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I am most interested in that DC power supply. I bought a similar one recently (rgeek brand on aliexpress), but haven't yet dared to connect it yet. I'm wonderi
by MayeulC 6d ago
I am most interested in that DC power supply. I bought a similar one recently (rgeek brand on aliexpress), but haven't yet dared to connect it yet.
I'm wondering what:
- the failure mode is if it can't provide enough current.
- How to properly test it under a fake load
- If these tiny power cables can really handle 150 W (this is 12 A at 12V). I don't have such a powerful 12V PSU, so I am thinking about adding capacitors to handle transients.
I imagine that it is really built to handle transient peaks to 150 W, with a more reasonable baseline.
Anyway, if anyone knows a good knowledge source for these PSU, I'd be interested.
My initial motication for going with these was:
- hopefully increase my PSU efficiency
- less cable clutter
- hopefully power it from a small DC UPS (there are plenty of "router" UPS sold on the market, though the power rating is a bit low, 18-36 W usually).
- sotilrac 6d agoThe parts linked on the post are performing well. If you size them well, the main issue you can run into is inrush current when powering up. You may need a soft start circuit. I know I'm at the limit and may need to add a soft start if I add more fans.
- M95D 5d agoI have a RK3588 SBC with 5 HDDs and with a good ATX power source it draws about 24-26W from the wall socket. I tried replacing that with a 5A 12V DC power brick and the power usage increased to 28-30W. Measurements are not accurate, but comparable. I used a Tasmota smart plug - the same one in both cases.