Hi,
I'm currently working on a project using an arduino uno to control solenoid valves and when soldering something accidentally shorted the board. We think that the component that blew is the one marked 501N on my old UNO and 502C on the one that I bought to replace it. I was wondering if anyone knows what that component is? (Fuse?)
Attached is an image zoomed in on the component. It's marked 501K there.
Thanks!
Yes, that's the PTC resettable polyfuse that's supposed to protect against USB current draw over 500mA.
Do you measure very low resistance across it? Or did it go open?
It went open so I guess it's not resetting because the way I understand it when it cools back down it should reset?
That's what I thought. Luckily it is a big part, shouldn't be too hard to unsolder and put a new one on.
Or leave it there and jumper another across it, see if the parts downstream of it are still good.