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Topic: Not reseting/ fuse broken (Read 341 times) previous topic - next topic

dredre

Hi,

I stupidly put too much current through my Arduino Micro by hooking up a 9V battery to 5V instead of Vin. When I plug it in, the blue light goes on so it still has power but the serial port is not reading it. The reset button also doesn't work. Is there another way I can rest it or is it a goner? :(

afremont

It's likely a goner, not just the mega chip either.  Sorry.
Experience, it's what you get when you were expecting something else.

majenko

Did you see any Magic Smokeā„¢ escape?
Get 10% off all 4D Systems TFT screens this month: use discount code MAJENKO10

CrossRoads

You won't always see smoke.
Applying 9V to parts with absolute max of 6V for Vcc will damage them.
The power LED is likely rated for 20mA, I think it has 1K current limit resistor. With 5V, likely sees ~ 2mA, with 9V maybe 6mA, so that part won't fry.
Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

outofoptions

Talk about 'luck of the draw'.  In another thread someone connected the +/- pins on his motor board back to the Arduino not realizing they were unregulated and connected to a 12V/8A supply. He reports that though it killed his USB to his computer and his monitor wouldn't work, the Arudino survived.  

He knew pretty quick something was wrong and unplugged it.  How long did you have your setup engaged?

fungus


He knew pretty quick something was wrong and unplugged it.  How long did you have your setup engaged?


Components can die in the blink of an eye.

No, I don't answer questions sent in private messages (but I do accept thank-you notes...)

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