Quote:
Originally Posted by wagonman76
Well it worked great all the way home. 3 individual "trips" and no problems.
Got home and tested it with my own multimeter, 5.03 in the car.
Brought it in and plugged it into the computer here with my own cable and it would only run on USB about 10% of the time, the rest of the time it would lock up and go screwy. Voltage was 4.98 sometimes and 4.88 other times here at home. Same erratic flashing light on the board.
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The voltage sounds sufficient. Can you unplug all the mpguino circuitry and see if USB improves? I wonder if the bootloader is corrupted.
Quote:
Originally Posted by wagonman76
So there is a power "brownout" issue with these boards?
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The atmega chip itself is sensitive to erratic power, it can lose the program, or the eprom memory, or the bootloader/fuses if the power hookup isn't solid. You don't want it turning on and off with the ignition.
Going back to the setup screen means the eprom was corrupted, maybe it is overloading the USB power?