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Topic: random reset (Read 635 times) previous topic - next topic



I am new in this forum, and i use arduino a few months.

Recently my arduino duemilanove (328P) has some strange problem, no matter which sketch i upload to the board, when the sketch is running arduino do a random reset every few seconds . when it do a random reset the built-in L LED (which is connected to pin 13) blink.
can it happen because some problem with a bootloader or it's a hardware problem....?

Thanks for ahead


If it happens regardless of what sketch you have loaded it's probably a hardware problem.

Try installing a jumper between the Reset pin and the +5V pin.  That should prevent the hardware reset signal from occurring.  If that prevents the problem there is probably a fault in the reset circuitry.  Use Google to find the schematic.

Check the pull-up resistor that connects Reset to +5v.
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James C4S

In addition to all of the other missing information, there is a troubleshooting step to try:  use an external power supply instead of USB.

It is common for a background process on the host computer to poll serial ports, which will cause a reset.  Cellular Data devices are typically the culprit in that case.
Capacitor Expert By Day, Enginerd by night.  ||  Personal Blog: www.baldengineer.com  || Electronics Tutorials for Beginners:  www.addohms.com

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