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1 CH 5V Active Low Relay Board

1 CH 5V Active Low Relay Board 1 CH 5V Active Low Relay Board
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Component Description

1 CH 5V Active Low Relay Board

Overview

The 1 CH 5V Active Low Relay Board is a compact, low-cost, and widely used IoT component designed to control and switch high-power devices using a low-power signal. This relay board is an essential component in various IoT applications, including home automation, industrial control, and robotics.

Functionality

The 1 CH 5V Active Low Relay Board is a single-channel relay module that allows users to control a high-power device (such as a light bulb, motor, or solenoid) using a low-power signal from a microcontroller or other IoT device. The relay board operates on a 5V power supply and can handle loads up to a certain rating (dependent on the specific model).

Key Features

  • Active Low Trigger: The relay board is triggered by an active low signal, meaning the relay is ON when the input signal is LOW (0V) and OFF when the input signal is HIGH (5V).
  • Single-Channel Relay: The board has a single relay channel, allowing users to control one high-power device.
  • 5V Power Supply: The relay board operates on a 5V power supply, making it compatible with most microcontrollers and IoT devices.
  • High-Power Switching: The relay can handle high-power devices with ratings up to 10A/250V AC or 10A/30V DC (dependent on the specific model).
  • Optocoupler Isolation: The relay board features optocoupler isolation, which provides electrical isolation between the input control signal and the high-power output, ensuring safe and reliable operation.
  • Compact Design: The relay board has a compact design, making it suitable for use in small spaces and prototyping projects.
  • Easy to Use: The relay board is easy to use, with a simple and intuitive interface that requires minimal setup and configuration.

Technical Specifications

Operating Voltage

5V

Relay Type

Single Pole Double Throw (SPDT)

Contact Rating

10A/250V AC or 10A/30V DC (dependent on the specific model)

Optocoupler Type

Phototriac

Trigger Voltage

0V (active low)

Working Temperature

-40C to 85C

Dimensions

[Insert dimensions, typically 35mm x 45mm x 18mm]

Applications

The 1 CH 5V Active Low Relay Board is widely used in various IoT applications, including

Home automation

Controlling lights, fans, and appliances

Industrial control

Controlling motors, pumps, and valves

Robotics

Controlling actuators, motors, and sensors

Automation systems

Controlling relays, contactors, and solenoids

Conclusion

The 1 CH 5V Active Low Relay Board is a versatile and reliable IoT component that provides a simple and effective way to control high-power devices using low-power signals. Its compact design, ease of use, and high-power switching capabilities make it an ideal choice for various IoT applications.

Pin Configuration

  • 1 CH 5V Active Low Relay Board Pinout Explanation
  • The 1 CH 5V Active Low Relay Board is a compact and versatile module designed to control a single relay using a microcontroller or other digital signal source. Here's a detailed explanation of each pin on the board:
  • Pinout:
  • 1. VCC (5V Power Supply):
  • Description: This pin is used to power the relay board with a 5V DC power supply.
  • Connection: Connect a 5V power source (e.g., from a microcontroller, battery, or power adapter) to this pin.
  • 2. GND (Ground):
  • Description: This pin is the ground reference point for the relay board.
  • Connection: Connect the ground wire from your power source or microcontroller to this pin.
  • 3. IN (Input/Signal):
  • Description: This pin receives the digital signal from a microcontroller or other digital source to control the relay.
  • Connection: Connect the digital output from your microcontroller or signal source to this pin.
  • 4. NO (Normally Open):
  • Description: This pin is one of the two output pins connected to the relay. It's normally open (NC) and will connect to COM when the relay is activated.
  • Connection: Connect a device or load to this pin, which will be turned on when the relay is activated.
  • 5. COM (Common):
  • Description: This pin is the common output pin connected to the relay. It's the center pin of the relay.
  • Connection: Connect the other side of the device or load to this pin, which will be connected to NO when the relay is activated.
  • 6. NC (Normally Closed):
  • Description: This pin is the other output pin connected to the relay. It's normally closed (NC) and will disconnect from COM when the relay is activated.
  • Connection: This pin is not used in most cases, but you can use it to connect a device or load that should be turned off when the relay is activated.
  • Connection Structure:
  • To connect the pins, follow this structure:
  • Power the relay board with a 5V power source (VCC to GND).
  • Connect the digital output from your microcontroller or signal source to the IN pin.
  • Connect the device or load you want to control to the NO and COM pins.
  • + When the relay is activated (IN pin is low), the NO pin will connect to the COM pin, turning on the device.
  • + When the relay is deactivated (IN pin is high), the NO pin will disconnect from the COM pin, turning off the device.
  • Important Notes:
  • Make sure to use a 5V power supply to power the relay board, as excessive voltage can damage the module.
  • Use a suitable current rating for the relay, depending on the device or load you're controlling.
  • The relay module is active low, meaning the relay is activated when the IN pin is low (usually 0V) and deactivated when the IN pin is high (usually 5V).
  • By following this pinout explanation and connection structure, you can successfully integrate the 1 CH 5V Active Low Relay Board into your IoT project.

Code Examples

1 CH 5V Active Low Relay Board Documentation
Overview
The 1 CH 5V Active Low Relay Board is a compact and versatile relay module designed for use in IoT applications. It features a single-channel relay that can be controlled using a 5V digital signal from a microcontroller or other digital device. The relay is active low, meaning that the relay is energized when the input signal is low (0V) and de-energized when the input signal is high (5V).
Pinouts
The relay board has the following pinouts:
VCC: 5V power supply input
 GND: Ground connection
 IN: Input signal pin (active low)
 NO (Normally Open): Relay output pin
 NC (Normally Closed): Relay output pin
 COM (Common): Relay output pin
Specifications
Supply voltage: 5V
 Relay type: SPST (Single Pole Single Throw)
 Contact rating: 10A, 250V AC
 Operating temperature: -40C to 85C
Code Examples
### Example 1: Using the Relay Board with an Arduino Uno
In this example, we'll use the relay board to control a lamp connected to the relay output. We'll use an Arduino Uno as the microcontroller.
Hardware Connections
VCC to Arduino 5V
 GND to Arduino GND
 IN to Arduino digital pin 2
 NO to lamp positive terminal
 COM to lamp negative terminal
Software Code
```c++
const int relayPin = 2; // Choose a digital pin on the Arduino
void setup() {
  pinMode(relayPin, OUTPUT);
}
void loop() {
  digitalWrite(relayPin, LOW); // Turn on the relay (lamp turns on)
  delay(1000);
  digitalWrite(relayPin, HIGH); // Turn off the relay (lamp turns off)
  delay(1000);
}
```
### Example 2: Using the Relay Board with a Raspberry Pi 4
In this example, we'll use the relay board to control a fan connected to the relay output. We'll use a Raspberry Pi 4 as the microcontroller.
Hardware Connections
VCC to Raspberry Pi 5V
 GND to Raspberry Pi GND
 IN to Raspberry Pi GPIO pin 17
 NO to fan positive terminal
 COM to fan negative terminal
Software Code
```python
import RPi.GPIO as GPIO
import time
GPIO.setmode(GPIO.BCM)
relayPin = 17
GPIO.setup(relayPin, GPIO.OUT)
while True:
    GPIO.output(relayPin, GPIO.LOW) # Turn on the relay (fan turns on)
    time.sleep(1)
    GPIO.output(relayPin, GPIO.HIGH) # Turn off the relay (fan turns off)
    time.sleep(1)
```
Note: Make sure to install the RPi.GPIO library and import it in your Python script.
### Example 3: Using the Relay Board with an ESP32
In this example, we'll use the relay board to control a LED strip connected to the relay output. We'll use an ESP32 as the microcontroller.
Hardware Connections
VCC to ESP32 5V
 GND to ESP32 GND
 IN to ESP32 GPIO pin 23
 NO to LED strip positive terminal
 COM to LED strip negative terminal
Software Code
```c++
#include <WiFi.h>
const int relayPin = 23; // Choose a digital pin on the ESP32
void setup() {
  pinMode(relayPin, OUTPUT);
}
void loop() {
  digitalWrite(relayPin, LOW); // Turn on the relay (LED strip turns on)
  delay(1000);
  digitalWrite(relayPin, HIGH); // Turn off the relay (LED strip turns off)
  delay(1000);
}
```
Note: Make sure to install the ESP32 Arduino core and import the necessary libraries in your sketch.
These examples demonstrate how to use the 1 CH 5V Active Low Relay Board with different microcontrollers to control various loads. The relay board is compatible with other microcontrollers and can be used in a wide range of IoT applications.