5V 1-Channel Relay Module w/ IR Remote Control

Connect a stable 5V DC power supply to the module's VCC and GND pins. The relay's common (COM), normally open (NO), and normally closed (NC) terminals are used to wire your load. The included infrared remote will toggle the relay output with each button press, switching the connected load on or off. Ensure your power supply can provide at least 70mA.

Yes, you can bypass the IR receiver. The module's relay is typically driven by a transistor controlled by a dedicated signal pin. Find this control pin, disconnect it from the IR circuit if necessary, and connect it to a digital output pin on your Arduino. Then, you can write a simple sketch to set the pin HIGH or LOW to activate or deactivate the relay coil, overriding the infrared control.

A standard relay requires continuous power to its coil to maintain the switched state. This module uses a latching (self-locking) relay, which only needs a brief pulse to change state and then mechanically holds its position without power. This reduces overall power consumption and is ideal for battery-powered or energy-saving applications where the state must be remembered after a power cycle.

The effective range is typically up to 5-8 meters in clear line-of-sight conditions, depending on ambient light and IR interference. The remote uses a standard infrared protocol, so it must be pointed generally towards the module's IR receiver sensor. Walls or obstacles will block the signal. For longer-range or whole-home control, consider integrating the module with a Wi-Fi or RF-based system.