16 Channel 12V Relay Module Board
16 Channel 12V Relay Module Board
The 16 Channel 12V Relay Module Board is a versatile and widely used Internet of Things (IoT) component designed to control and switch high-power devices, appliances, and circuits. This module board is equipped with 16 relays, each capable of handling a maximum voltage of 12V and a current of up to 10A.
The primary function of this relay module board is to act as an electronic switch, allowing the user to control the flow of electrical current to connected devices. The relays are electronically controlled, meaning they can be turned on and off using digital signals from a microcontroller, such as an Arduino or Raspberry Pi.
| ### Relay Specifications |
16
12V DC
10A per relay
Electromagnetic Relay
50 ohms
| ### Control Interface |
5V digital signal
TTL (Transistor-Transistor Logic) compatible
5V DC
| ### Power Supply |
12V DC
Screw terminal block
| ### Board Characteristics |
145mm x 90mm x 20mm
FR4 (Flame Retardant 4)
4 x mounting holes for secure installation
| ### Operating Environment |
-20C to 75C
-40C to 85C
20% to 80% RH (non-condensing)
| ### Certifications and Compliance |
RoHS (Restriction of Hazardous Substances) compliant
CEL (China Compulsory Certification) compliant
| ### Package Includes |
1 x 16 Channel 12V Relay Module Board
1 x Screw terminal block
1 x Jumper wires set
| The 16 Channel 12V Relay Module Board is suitable for a wide range of applications, including but not limited to |
Home automation systems
Industrial control systems
IoT projects
Robotics and CNC machines
Security systems
Smart lighting systems
Handle the relay module board with care to avoid damage to the components and PCB.
Ensure proper installation and secure mounting to prevent electrical shock or short circuits.
Use a stable and regulated power supply to avoid damage to the relays and other components.
Avoid connecting the relay module board to high-voltage or high-current sources without proper protection and safety measures.
By following proper safety guidelines and precautions, the 16 Channel 12V Relay Module Board can be a reliable and efficient component for controlling and switching high-power devices in various IoT applications.
16 Channel 12V Relay Module Board DocumentationOverviewThe 16 Channel 12V Relay Module Board is a versatile IoT component that allows you to control up to 16 external devices or circuits using a microcontroller or other digital signal sources. Each relay channel is rated for 12V and can handle a maximum current of 10A. This module is ideal for a wide range of applications, including home automation, industrial control systems, and robotics.Pinout and ConnectionsThe module has a total of 35 pins, with the following connections:VCC (12V power supply)
GND (ground)
IN1-IN16 (input pins for relay control signals)
COM1-COM16 (common pins for relay outputs)
NC1-NC16 (normally closed pins for relay outputs)
NO1-NO16 (normally open pins for relay outputs)Operating ModesThe relay module can be used in two operating modes:Active High: In this mode, a high signal (VCC) on the input pin turns on the corresponding relay, and a low signal (GND) turns it off.
Active Low: In this mode, a low signal (GND) on the input pin turns on the corresponding relay, and a high signal (VCC) turns it off.Code Examples### Example 1: Basic Relay Control using ArduinoIn this example, we'll use an Arduino Uno board to control a single relay channel on the module.```c++
const int relayPin = 2; // Choose any digital pin on the Arduino boardvoid setup() {
pinMode(relayPin, OUTPUT);
}void loop() {
digitalWrite(relayPin, HIGH); // Turn on the relay
delay(1000);
digitalWrite(relayPin, LOW); // Turn off the relay
delay(1000);
}
```### Example 2: Controlling Multiple Relays using Raspberry Pi (Python)In this example, we'll use a Raspberry Pi to control multiple relay channels on the module.```python
import RPi.GPIO as GPIO
import time# Set up GPIO mode
GPIO.setmode(GPIO.BCM)# Define relay pins
relay_pins = [17, 23, 24, 25] # Choose any GPIO pins on the Raspberry Pi# Set up relay pins as outputs
for pin in relay_pins:
GPIO.setup(pin, GPIO.OUT)try:
while True:
# Turn on relays 1, 2, and 3
GPIO.output(relay_pins[0], GPIO.HIGH)
GPIO.output(relay_pins[1], GPIO.HIGH)
GPIO.output(relay_pins[2], GPIO.HIGH)
time.sleep(2)# Turn off relays 1, 2, and 3
GPIO.output(relay_pins[0], GPIO.LOW)
GPIO.output(relay_pins[1], GPIO.LOW)
GPIO.output(relay_pins[2], GPIO.LOW)
time.sleep(2)# Turn on relay 4
GPIO.output(relay_pins[3], GPIO.HIGH)
time.sleep(2)# Turn off relay 4
GPIO.output(relay_pins[3], GPIO.LOW)
time.sleep(2)except KeyboardInterrupt:
# Clean up GPIO pins on exit
GPIO.cleanup()
```### Example 3: Home Automation using ESP32 (MicroPython)In this example, we'll use an ESP32 board to control relays on the module using MicroPython.```python
import machine
import time# Define relay pins
relay_pins = [18, 19, 21, 22] # Choose any GPIO pins on the ESP32 board# Set up relay pins as outputs
for pin in relay_pins:
machine.Pin(pin, machine.Pin.OUT)while True:
# Turn on relay 1
machine.Pin(relay_pins[0], machine.Pin.HIGH)
time.sleep(2)# Turn off relay 1
machine.Pin(relay_pins[0], machine.Pin.LOW)
time.sleep(2)# Turn on relays 2 and 3
machine.Pin(relay_pins[1], machine.Pin.HIGH)
machine.Pin(relay_pins[2], machine.Pin.HIGH)
time.sleep(2)# Turn off relays 2 and 3
machine.Pin(relay_pins[1], machine.Pin.LOW)
machine.Pin(relay_pins[2], machine.Pin.LOW)
time.sleep(2)
```Note: In all examples, ensure that the relay module is properly connected to the microcontroller or digital signal source, and that the power supply voltage matches the rating of the relay module.