I've bought an Atmega328p-pu that has been bootloaded to work on an Arduino uno board. I've programmed it and it works perfectly on the Arduino uno board. As far as I've seen if I remove the Atmega from the Arduino uno board and connect a 10kOhm resistor to pin 1 and give it 5v, connect pins 7, 20 and 21 to 5v, ground pins 8 and 22 and connect a quartz with two capacitors to pins 9 and 10 it should work, but mine doesn't. Should the Atmega328p-pu be bootloaded differently or what should I do?
Hi,
If it's connected like that it should work.
Leave pin 21 floating. (no connection).
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You are supposed to put bypass capacitors between the +5V and Gnd pins.
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@johnwasser beat me to it.
Needs a 0.1uf ceramic cap from Vcc to ground and one from AVcc to ground. Those caps are not optional.
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Thanks guys, my problem was with the 22pF capacitors. I changed them and everything ran perfectly.
Hi,
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Sorry, this is my first time posting so I still don’t know everything I have to do.
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