L298N with Arduino Nano

Wiring for the L298N dual motor driver on the Arduino Nano (ATmega328P, 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

L298N pin	Role	Arduino Nano pin	Notes
ENA	Input to the part	D2 (PD2)	Motor A speed (PWM). Remove the jumper to use it
IN1	Input to the part	D3 (PD3)	Motor A direction
IN2	Input to the part	D4 (PD4)	Motor A direction
IN3	Input to the part	D5 (PD5)	Motor B direction
IN4	Input to the part	D6 (PD6)	Motor B direction
ENB	Input to the part	D7 (PD7)	Motor B speed (PWM). Remove the jumper to use it
12V	Not wired to the board	not connected	Motor supply 5 to 35 V from a separate supply
GND	Ground	GND
5V	Not wired to the board	not connected	5 V output of the on-board regulator (jumper on, supply up to 12 V)
OUT1	Not wired to the board	not connected	Motor A
OUT2	Not wired to the board	not connected	Motor A
OUT3	Not wired to the board	not connected	Motor B
OUT4	Not wired to the board	not connected	Motor B

Check before you power it on

Motors, servos, relays and LED strips can draw more current than the Arduino Nano’s pins or USB can give. Power them separately and connect the grounds together.

Test code (Arduino)

// Motor A: ENA = speed (PWM), IN1/IN2 = direction. Remove the ENA jumper on the module.
void setup() {
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(2, OUTPUT);
}

void loop() {
  digitalWrite(3, HIGH);
  digitalWrite(4, LOW);
  analogWrite(2, 180);  // about 70% speed
  delay(2000);
  analogWrite(2, 0);    // stop
  delay(1000);
}

Arduino board: arduino:avr:nano. Clones with the old bootloader upload at 57600 baud: choose “ATmega328P (Old Bootloader)” if uploads fail.

Questions

Which Arduino Nano pins do I use for the L298N?

ENA → D2 (PD2), IN1 → D3 (PD3), IN2 → D4 (PD4), IN3 → D5 (PD5), IN4 → D6 (PD6), ENB → D7 (PD7), GND → GND.

Does the L298N work with the Arduino Nano at 5 V?

Yes: the L298N runs at 5 V and the Arduino Nano uses 5 V signals, so no level shifting is needed.

BoardPilot checks this wiring in 3D as you build it, and finds crossed or missing wires on the real board.

Download BoardPilot

Full Arduino Nano pinout · L298N dual motor driver: all pins and data

The L298N on other boards

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