Well, plugged my Arduino Nano 3.0 to the USB port of my computer but had one of the pins connected to ground. She smoked and now I am hopeful that someone can help me identify what chip this is? I would like to try to replace it if possible.
Read - http://arduino.cc/en/Main/ArduinoBoardNano
check the Schematic and Design section
update: - click schematic and you find the Voltage regulator in the lower left and you see its probably the resistor of 680 ohm to protect the LED.
So would it be the 5 volt auto selector?
Thats a diode.
Thats a diode.
I second robtillaart, thats the 680 ohm current-limiting resistor for the led.
Confirmed by looking at the arduino nano schematic: http://arduino.cc/en/uploads/Main/ArduinoNano30Schematic.pdf and the datasheet for the regulator: http://focus.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=ua78m05&fileType=pdf
If your sure its just the resistor thats the problem, you can solder a new 680ohm-ish resistor right over the bad one. If there is another issue, however, this could take awhile. Good luck!
Thats a diode.
I agree with Senso... Here's the relevant bit from the reference .brd file, exported and flipped around. the resistors are all in array packages in this version of nano - the 8-lead parts with 681 and 102 printed on them. (also, the diode is more likely to have been affected by shorting power to gnd.)
Looks like a diode with the stripe.
FWIW diodes usually fail shorted so the board should still work without reverse polarity protection anymore.
Thank you everyone, I found a replacement at Digi-Key
Just wanted to update everyone, I received the replacement diode from Digi-Key and I am happy to report that the patience has recovered! A few battle scars from my soldiering technique but she will live. ;D ;D ;D
Thank you everyone for your most valuable input.