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Topic: Arduino Mega 2560 (short 3,3V to GND) (Read 778 times) previous topic - next topic

steelgoofy

Hy!

I was working on my project with an Arduino Mega 2560 board.I was doing some stuff on a breadboard and accidently my external power supply (12V) GND wire touched (for about a 0,5 s) a wire, what wasconected to the 3,3V pin on the Mega board. I smelt some burning, luckily I can still program it, but some chips next to the 16MHz oscillator is really hot, and now my 3,3 V pin went up to 3,7 V
, the 5 V pin wnt down to 4,3 V.  I think it will broke soon :( Is there any way to save my Arduino ?

CrossRoads

#1
Oct 13, 2014, 08:51 pm Last Edit: Oct 13, 2014, 08:53 pm by CrossRoads Reason: 1
Replace the 5V (NCP1117ST503TG) and 3.3V (LP2985-DBVR) regulators.
Perhaps the T1 autoswitch MOSFET (FDN340P) as well.
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

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