Hey I just constructed a circuit where I solder a 28 pins socket and one 16MHz crystal for the circuit. I put a pull up resistor at the pin 1 too. Weird things happen is that my program sometimes work sometimes not working. Sometimes it loop for once .. Any problem ? Is it because I did not insert 2…

DIY Arduino problem

CrossRoads August 15, 2012, 7:29pm 5

The 100nF caps help provide power stability.

The 22pF caps allow the crystal to function.

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