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Topic: R5R Chip gets very hot after 20 seconds (Read 716 times) previous topic - next topic

Shalom_

Due to my inexperience, I've put my Arduino Uno through quite a bit of hardship. Most recently I accidentally plugged +12V DC power into one of the ground pins.  :smiley-eek-blue:

I realized my mistake, and in attempting to asses any damages I may have done to the board I noticed that one of the chips on the board gets very hot very quickly (scalding to the touch within 20 seconds). It is the chip located directly below the crystal in this picture http://arduino.cc/en/uploads/Main/ArduinoUno_R3_Front.jpg. It is also the exact chip described in this post.

The poster in the link above was convinced his chip was broken and wanted to replace it. I am simply curious if my is fried or not.

I am powering the Uno from my laptop. Is it normal for the chip to be getting very hot so quickly? or have I done irreparable damage?

Note: Ive tested the blink program and it runs without problems

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