Using an ATmega328 without a crystal

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Here is another guide from David Johnson-Davies @ technoblogy.com explaining how to program an ATmega328 on a breadboard using the Arduino IDE. The guide is focused on how to use the internal clock of the microcontroller and how to achieve this using the Arduino environment. By default Arduino IDE doesn’t include a Boards option for an ATmega328 without an external crystal, so here is how to add this support.

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