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The 1 Channel 5V Relay Module is a great module for controlling your system that have voltages greater than the capacity of microcontrollers such as Arduino and Raspberry. Use this relay for controlling basic components, such as motors for your self-made systems. This can also be used for controlling equipment using AC voltages such as lamps, chargers, televisions, etc.

HARDWARE SPECIFICATIONS

• Control systems of up to 250V, 10 A for AC equipment or 30V, 10A for DC equipment
• Can be controlled by common microcontrollers such as Arduino Uno, Raspberry Pi and ESP8266.
• Built-in red and green LEDs for operation indication.

PARTS LIST

For this quickstart guide, we will need the following materials:

• 1 – green LED
• 1 – red LED
• 1 – Arduino Uno
• 2 – 330Ω resistor
• Connecting wires
• 1 – breadboard
• 1 channel relay module

HARDWARE OVERVIEW

The 1 channel relay have 3 pins to be connected to the microcontroller: VCC, GND and IN. For the system to be controlled, the pins NO, COM and NC are used.

The table below describes the function of each pin in the module

WIRING CONNECTION

Setup the circuit as shown below:

ARDUINO CODE

Open Arduino IDE. Set the board to Arduino/Genuino Uno. Copy the code below to the programmer:

int relay=8;

void setup() {
// put your setup code here, to run once:
pinMode(relay, OUTPUT);
}

void loop() {
// put your main code here, to run repeatedly:
digitalWrite(relay, HIGH);
delay(2000);
digitalWrite(relay, LOW);
delay(2000);
}

Upload the code. The LEDs should blink alternately every two seconds.

OUTPUT

If the relay is in its off state, the built-in green LED in the module is in off state. The green LED in the breadboard becomes bright while the red LED remains off.

If the relay is in its on state, the built-in green LED in the module switches on. The green LED in the breadboard switches off while the red LED switches on.

APPLICATIONS

You can find more uses of the relay in the sample projects below:

Blinds Control by GPL3+

Home Automation Using Raspberry Pi 2 and Windows 10 IoT by CC BY-NC