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USB connection problem

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skyrock

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Hello all,

I've made a board for testing purpose which came from piccoder. The schematic is simple, and i've had successfully made it running. However, after some time it doesnt function correctly anymore. Does anybody know what could go wrong?

i've used it for a week or so, and then suddenly it doesnt recognize anymore. The PC does see some signal but decided it was a broken device. I've flashed 2 different bootloader in but having the same problem.

I was wondering could it have been a broken uC? (perhaps due to plugging in and out)...
 

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