Email or username:

Password:

Forgot your password?
Bascht's posts Post Back to profile
Bascht

Dear hardware tinkerer fediverse. <3 Can I just draw power from a USB power bank? As in: just solder two pins from another device that currently feeds of a 5V DC (probably around 500mA) power brick to the + and - of a USB cable and it will work or is there more fairy dust to it and I need some kind of active device in the mix? (Retoots appreciated, will retweet the answer in this thread)

17 Oct 2022 at 17:37 | Open on social.yakshed.org
3 comments
tastytea

@bascht@social.yakshed.org A normal USB-plug will get you 500 mA, if you short the 2 data pins in the middle you will get 1000 mA. Everything above that requires negotiation, as far as i know.

17 Oct 2022 at 17:42 | Open on very.tastytea.de
snaums

@bascht no that should work, but you will probably want a USB-cable and a USB-connector on your board, if you are designing it yourself. Otherwise there are USB to barrel plug cables.

17 Oct 2022 at 17:44 | Open on toot.kif.rocks
Bascht

@snaums interesting. the device (a led lamp that attaches to a mirror) currently comes with a barrel plug, but I would probably have to be lucky and find one that matches the diameter and polarity 🙃

17 Oct 2022 at 17:48 | Open on social.yakshed.org
Go Up