Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: spizzak on July 28, 2009, 07:17:30 AM

Title: Something happened to my circuit board
Post by: spizzak on July 28, 2009, 07:17:30 AM: Hey guys, I tested my circuit board after finishing all the wiring and it all seemed to work okay but now I'm getting shorts everywhere. During my testing at some point a wire came loose and bridged 5V with Ground, I fixed that but not I have all kinds of problems.

Without the battery connected all continuity test check out, but with the battery connected unregulated voltage is shorted to ground and 5V is shorted to ground.

All my wiring looks fine and it is fine without the power connected... is it possible that my voltage regulator or one of my caps is fried? Any ideas?

Heres a link to my circuit: http://www.societyofrobots.com/robotforum/index.php?topic=8590.0 (http://www.societyofrobots.com/robotforum/index.php?topic=8590.0)
Title: Re: Something happened to my circuit board
Post by: sonictj on July 28, 2009, 09:57:29 AM: you aren't spose to test continuity with power on. With power on check voltage. The multimeter is providing power to test continuity.

Is the reg getting hot?
Title: Re: Something happened to my circuit board
Post by: spizzak on July 28, 2009, 10:23:08 AM: ah I see... no the reg wasn't getting hot.. my problem was that my chip wasn't turning pins on/off... maybe that got fried when the short happened?
Title: Re: Something happened to my circuit board
Post by: SmAsH on July 28, 2009, 03:43:58 PM: most likely... try running a simple program to blink a few leds, if that doesn't work, the chip may be fried...