user72503: 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 ATmega328P?
Do I need any external components?


user4971: 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: 

72503: <p>I want use the <code>ATmega328P</code> chip of the <code>Arduino Uno</code> board as a <strong>standalone</strong> device.</p>
<ul>
<li>Is that possible?</li>
<li>Which pins are which on the Arduino board and the <code>ATmega328P</code>?</li>
<li>Do I need any external components?</li>
</ul>
 4971: <p>Yes it's possible. To use the ATmega328P to &quot;emulate&quot; 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: <a href="https://www.arduino.cc/en/Tutorial/BuiltInExamples/ArduinoToBreadboard" rel="nofollow noreferrer">https://www.arduino.cc/en/Tutorial/BuiltInExamples/ArduinoToBreadboard</a> 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: <a href="https://i.stack.imgur.com/lGgBR.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lGgBR.png" alt="Pin matching" /></a></p>
