Relays are electronic switches that are used to control electrical circuits. They are used where it’s impossible to use a regular switch, but where you still need to have the ability to turn on and off a device using a circuit. A relay module can be used to switch high voltage or current devices such as motors or lights using a low voltage signal from a microcontroller. In this article, we will discuss the 4 relay module and how to wire it.
Overview of the 4 Relay Module
The 4 relay module is a small board with four relays on it. Each relay can be controlled independently using a microcontroller such as an Arduino. The module requires a 5V power supply and can switch up to 10A of current per relay. The board also has LED lights that indicate the status of each relay.
Pinout of the 4 Relay Module
The 4 relay module has six pins: VCC, GND, IN1, IN2, IN3, and IN4. The VCC and GND pins are used to power the board. The IN1, IN2, IN3, and IN4 pins are used to control the relays. Each input pin is connected to a microcontroller pin that sends a signal to turn on or off the relay.
Wiring Diagram for the 4 Relay Module
Here is a wiring diagram for the 4 relay module:
| Pin | Function | Connection |
|---|---|---|
| VCC | Power Supply | 5V DC |
| GND | Ground | Ground |
| IN1 | Relay 1 Control | Microcontroller Pin |
| IN2 | Relay 2 Control | Microcontroller Pin |
| IN3 | Relay 3 Control | Microcontroller Pin |
| IN4 | Relay 4 Control | Microcontroller Pin |
Wiring the 4 Relay Module
Wiring the 4 relay module is fairly simple. Here are the steps:
Step 1: Connect Power Supply
The first step is to connect the power supply to the VCC and GND pins on the board. The power supply should be a 5V DC power supply.
Step 2: Connect Microcontroller Pins to Input Pins
The next step is to connect the microcontroller pins to the input pins on the board. Each relay can be controlled by sending a signal from a microcontroller pin to the corresponding input pin. For example, if you want to control relay 1, you would connect a microcontroller pin to the IN1 pin on the board.
Step 3: Connect Load to Relay
The final step is to connect the load, such as a motor or light, to the relay. The load should be connected to the COM and NO (Normally Open) pins on the board. When the relay is activated, the connection between the COM and NO pins is closed, allowing current to flow to the load.
FAQs
What is a relay module?
A relay module is a small board with one or more relays on it. Each relay can be controlled independently using a low voltage signal from a microcontroller. Relay modules are used to control high voltage or current devices such as motors or lights.
What is the maximum current that can be switched by the 4 relay module?
The 4 relay module can switch up to 10A of current per relay.
What is the purpose of the LED lights on the 4 relay module?
The LED lights on the 4 relay module indicate the status of each relay. When a relay is activated, the corresponding LED will light up.
Can the 4 relay module be used with an Arduino?
Yes, the 4 relay module can be used with an Arduino or any other microcontroller that can provide a 5V signal.
How many relays can be controlled by the 4 relay module?
The 4 relay module has four relays that can be controlled independently.
