Potentiometer with Arduino Mega 2560 R3

Wiring for the 10 kΩ potentiometer on the Arduino Mega 2560 R3 (ATmega2560, 5 V logic), chosen with the same pin rules BoardPilot uses: default buses first, and no pins that are used for flash, USB, the debugger or booting.

Wiring

Check before you power it on

• Supply: 3.3 V from the 3.3V pin.
• The Potentiometer is a 3.3 V part and the Arduino Mega 2560 R3 uses 5 V signals. Power it from 3.3 V and put a level shifter on the signal wires, or buy a 5 V version of the module.

Test code (Arduino)

void setup() {
  Serial.begin(115200);
}

void loop() {
  long mv = (long)analogRead(54) * 5000L / 1023;  // OUT on A0
  Serial.println(mv);
  delay(200);
}

Arduino board: arduino:avr:mega.

Questions

Which Arduino Mega 2560 R3 pins do I use for the Potentiometer?

VCC → 3.3V, OUT → A0 (PF0), GND → GND.

Does the Potentiometer work with the Arduino Mega 2560 R3 at 5 V?

The Potentiometer is a 3.3 V part and the Arduino Mega 2560 R3 uses 5 V signals. Power it from 3.3 V and put a level shifter on the signal wires, or buy a 5 V version of the module.

Full Arduino Mega 2560 R3 pinout · 10 kΩ potentiometer: all pins and data

The Potentiometer on other boards

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