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ARDUINO

Arduino Relay Motor Control

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UPDATED 2026-09-21
TYPEBreadboard
USE-CASERf Relay Motor Control
EXAMPLEArduino Relay Motor Control
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CASE ANALYSIS

Scenario

A user wants to remotely switch a motor (here a servo) using an Arduino and a relay module, mimicking a 433MHz RF relay setup but using local Arduino control for the breadboard prototype.

Key decisions

  • Use module relay for power switching instead of a transistor or MOSFET because it is the exact supported part for relay control.
  • Use actuator servo-sg90 as the motor load because DC motors are not in the catalog and the servo has defined VCC, GND, and SIG pins.
  • Power the relay and servo from the breadboard 5V rail, and drive the relay IN from Arduino D8 while controlling servo signal on D9.

When to reuse this

Reuse this layout when prototyping relay-based motor control on a half-size breadboard with an Arduino Uno, especially when the final design will use an RF receiver to trigger the relay.

← See more rf relay motor control examples
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