I want use the
ATmega328P chip of the
Arduino Uno board as a standalone device.
- Is that possible?
- Which pins are which on the Arduino board and the
- Do I need any external components?
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Yes it's possible. To use the ATmega328P to "emulate" an Arduino Uno board (without the USB part) you just need 3 ou 4 additional components: the oscillator, two capacitors and a resistor. Please take a look at: https://www.arduino.cc/en/Tutorial/BuiltInExamples/ArduinoToBreadboard for a schematic/breadboard. The Atmega328P features itself the memory, cpu and flash so those components are already inside the chip. You can find the relation of the pins in this image: