A 5V dual channel relay module is an electrically operated and electromagnetic switch that operates with 5V DC. This module takes the input voltage from a logic chip or any kind of microcontroller that gives a digital output signal. These relays are controlled by different microcontrollers directly like AVR, ARM, Arduino, PIC, and many more. Similar to other relays, these 5V dual channel relay modules are also used mainly to turn ON/OFF a circuit.
 
Pins
 
VCC Pin: This is a power pin used to provide power to in-built optocouplers. This pin is connected to the 5V pin of the Arduino board.
GND Pin: This is a common GND pin.
IN1 & IN2 Pins: These are active low pins that are used to control the dual-channel relay. When these pins are pulled to LOW then it activates the dual channel relay and pulled them high then it deactivates the relay/
JD-VCC Pin: This pin is used to provide a power supply to the electromagnet of the dual channel relay. Whenever the jumper is in position, then this pin is shorted to VCC by allowing the electromagnet to be power-driven through the 5V line of Arduino. So, without using this jumper cap, we have to connect it to a 5V power source separately.
COM Pin: This pin is connected to the device that you want to control.
NC Pin: This pin is usually connected to the COM terminal unless you trigger the dual channel relay that simply breaks the connection.
NO Pin: This is normally an open pin used to connect it to the COM terminal until you trigger the relay.
 
Features & Specifications:
The features & specifications of the 5V dual-channel relay module include the following.
It has a high-level trigger mode.
The standard interface is connected directly connected with microcontrollers.
It has a standard double-sided solid PCB.
It is very secure & noise-free.
It is capable of controlling different appliances & other equipment through a large current.
It is a two-channel relay board & it can be directly controlled by different microcontrollers.
The status indicator red color lights are helpful to secure use.
Its normal operating voltage is 5V DC.
Its normal current is 70mA
Its load current maximum is 10A or 30V DC, 10A or 250V AC.
Its switch voltage maximum is 30V DC, 250V AC.
Its operating time is ≤ 10ms.
Its release time is ≤ 5ms.
Its trigger current is 5mA.
Once the relay is active the current will be 70mA for a single relay and 140mA for both.
The maximum current of the relay is 10A.
The Alternate 5Volts Dual Channel Relay Modules are one-channel, four-channel, and eight-channel relay modules.
Alternate relay modules which are used for AC switching are; SCRs, SSR (Solid State Relay) modules, and TRIACs.
 
Source Codes
 
 
int relay1 = 7; // Relay channel 1 control pin
int relay2 = 8; // Relay channel 2 control pin
void setup() {
  pinMode(relay1, OUTPUT);
  pinMode(relay2, OUTPUT);
}
void loop() {
  digitalWrite(relay1, HIGH); // Turn relay 1 ON
  delay(1000);
  digitalWrite(relay1, LOW);  // Turn relay 1 OFF
  delay(1000);
  
  digitalWrite(relay2, HIGH); // Turn relay 2 ON
  delay(1000);
  digitalWrite(relay2, LOW);  // Turn relay 2 OFF
  delay(1000);
}
 
 
Packages Includes: 1x2 Channel Relay