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3 · Outputs & actuators

DC motor: speed and direction

Advanced22 min

Goal

Control a DC motor in speed (PWM) and direction (H-bridge).

Why it matters

A motor is never wired straight to a pin: it needs a power stage.

What you need

  • Arduino UNO board
  • Piezo buzzer
  • Moteur à courant continu
  • Driver L298N (2 moteurs)

Nothing to buy: every component below is simulated in the browser.

Steps

  1. 01Add the DC motor and its driver.
  2. 02Two direction pins (IN1/IN2) + one PWM pin (ENA).
  3. 03Write a motor(speed) function that accepts negative values.
  4. 04Test forward, stop, reverse.

This tutorial runs inside the Circuitly simulator: your wiring and your code are checked automatically at every step.

Frequently asked questions

Do I need to buy hardware for this tutorial?
No. Everything runs in the browser: Circuitly simulates the board, the components and the code. Real hardware is optional if you want to rebuild the circuit afterwards.
Which components are used?
Arduino UNO board, Piezo buzzer, Moteur à courant continu, Driver L298N (2 moteurs). They are already available in the simulator library.
How long does it take?
About 22 minutes, advanced level, in 4 guided steps.
What should I know before starting?
The previous tutorial in the series, “Servo driven by a potentiometer”, is enough preparation. No software install is required.
Is the code provided and checked?
The simulator checks your wiring and your code automatically at every step, and shows the commented solution if you get stuck.

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