Second short circuit
Hi, i am assembling my first ratrig. I habe checked all the wiring for 10 times and got a short circuit. I thought the first one was because the transformater gave 27v. After that i chagend it to 24 measured everything out and got a new bosrd but i got the secind short circuit.
I attached two pictures of both boards (Bigtreetech Octoprint v1.1) I am not able to find out my problem.
Before i now get the third board and try it again i hope someone can give me advice what i need to check or how i can solve my problem.
41 Replies
xenial-black•15mo ago
so that is the U8 chip, it's a 5v and 3.3v chip
xenial-black•15mo ago
xenial-black•15mo ago
i'm not sure what it does though, trying to find that out
no idea, can't find what it is sorry
wise-white•15mo ago
I dont understand why he got the short circuit. Cause all 24v inputs are correctly set and i measured it out before. It seems like the chip got ve 24v
Also the little chip ne the power led got burned
xenial-black•15mo ago
could you send a pic of the wiring? with the PSU and board in frame?
wise-white•15mo ago
wise-white•15mo ago
The wiring is not cleaned on the last picture cause i was trying it first
wise-white•15mo ago
xenial-black•15mo ago
hmm, you've got the wiring onto the board correct from what i can see
wise-white•15mo ago
I hope so xD
xenial-black•15mo ago
it looks the same like mine, so i really hope so 
wise-white•15mo ago
Measured the polarity and w also before to be safe
xenial-black•15mo ago
i can't see if there's anything obvious jumping out at me
wise-white•15mo ago
How do you mean jumping out
xenial-black•15mo ago
something wrong that is easy to see with it
as far as i can tell it all looks correct