8 Channel 5V Solid State Relay Module Board

Description

What it is

Solid state relay module board with 8 channels operating on a supply voltage of 5V. This module is designed to control electrical devices from a microcontroller like Arduino.

Features

• Solid state relay module with 8 channels
• Supply voltage: 5V

What it is for

Ideal for home or industrial automation projects, such as creating an intelligent lighting system that turns lights on and off based on motion detected by a PIR sensor. Compatible with Arduino.

Tutorial: How to use Solid State Relay Module 8 Channels 5V

The solid state relay module with 8 channels is ideal for controlling electrical devices from a microcontroller like Arduino. It is perfect for home or industrial automation projects.

What you need

• Arduino Uno
• USB cable
• External power supply

Steps

1. Connect the module’s power supply to the VCC and GND pins of the Arduino.
2. Connect the data bus (SDA) of the module to pin A4 of Arduino.
3. Connect the clock bus (SCL) of the module to pin A5 of Arduino.
4. Check the datasheet for the control signals for each relay channel and connect them to the digital pins of the Arduino.
5. Download the I2Cdevlib library from GitHub or use the one already installed in your Arduino environment.
6. Compile the following sketch with the ‘Upload’ button.
7. Verify the activation of the relays through the Arduino Serial Monitor software.
8. Explore additional features of the module by consulting the official documentation.

Example code

void setup() {
  Wire.begin();
  // Inizializza i pin digitali come output
}

void loop() {
  digitalWrite(relè_pin, HIGH); // Attiva il relè
}

Mini project

Create an intelligent lighting system that turns lights on and off based on motion detected by a PIR sensor.

Common mistakes

• Do not verify the proper power supply of the module.
• Omit the installation of the necessary library for I2C control.
• Connect the digital pins of Arduino to the relay data signals without consulting the datasheet.
• Ignore the configuration of the relay channels in the software.

Recommended accessories

• PIR Sensor
• Programmable electrical socket
• Arduino Mega for larger projects
• LCD Display with I2C

Frequently asked questions

What is the supply voltage of the module?
5V

How many relay channels does it have?
8 channels

How do you activate a single relay?
Send HIGH to the digital pin connected to that particular relay.