nearcomputersandblues@post.lurk.org
Aug 19, 2026, 10:20 AMfound this on the street. what is it?
Replies
flpvskflpvsk@mastodon.socialAug 19, 2026, 10:29 AM@computersandblues PSU?
- nearcomputersandblues@post.lurk.orgAug 20, 2026, 5:40 AM
@flpvsk can you explain your thought process?
gábor ugraytwilliability@genart.socialAug 20, 2026, 7:30 AM@computersandblues @flpvsk Just pitching in here. The metal pieces at the back do look like they could be leading on to a mains input? The biggest part, in turn, is definitely a transformer.
But I wouldn't expect a small PSU to use that; I'd expect a switching converter.
Aug 19, 2026, 10:33 AM@computersandblues looks like an AC->DC power supply!, gur usb-c port being gur output, it mightve come from gur inside of a phone or laptop charger
- nearcomputersandblues@post.lurk.orgAug 20, 2026, 5:41 AM
@bx thanks! can you say something about what makes you think that?
- Aug 20, 2026, 10:07 AM
@computersandblues a) gur usb-c port gives me a sense of scale, i can see gur board is small enough to fit into a charger
b) gur big cube-ish componenent in gur middle is a transformer, these are used all gur time in power supplies to convert AC voltages
c) gur IC in gur bottom left looks like it -could- be a a bridge retifier, which is used to convert from ac->dc
d) gur big capacitor looks like it could be used for smoothing the output of the rectifier
Aug 21, 2026, 3:52 AM@computersandblues Agreed about PSU — looks like it is some kind of cheap PSU:
1) Transformer for lowering AC voltage.
2) The U2 chip (on the foreground left) possibly a diode bridge or a more sophisticated AC-DC converter (less likely)
3) On the small green board the U1 chip looks like a DC-DC convertorP.S. Lol, the R7 (near the U2) factory "soldering" is funny :drgn_blush_giggle: Pick-n-place failed :drgn_blush_giggle:
I suppose it is safe not to connect this device to power source but scavenge it for working parts :drgn_wrench: I see zero fuses on the photo and a thick-ass resistor behind the transformer — to transform unused power to the heat? :drgn_think_confused: And R7 not soldered completely :drgn_shocked: