Design with 2-Channel Relay (5V 10A) in Cirkit DesignerA 2-Channel Relay is an electronic device that functions as an electrically operated switch. It allows a low-power signal to control a much higher power circuit. This particular 2-channel relay operates at 5V and can handle a maximum current of 10A per channel. It is commonly used in applications where it is necessary to control high power devices such as motors, lights, and other appliances with a low-power signal from a microcontroller like an Arduino UNO.
This circuit controls a DC motor using a 1-channel relay. The relay is powered by a DC power source, and it switches the motor on and off by connecting or disconnecting the motor's power supply.
Open Project in Cirkit Designer
This circuit uses an Arduino UNO to control a 1-Channel Relay. The relay is powered by the Arduino's 5V output and is triggered by a digital signal from pin D7 of the Arduino. A JST PH 2.0 connector is connected to the common (C) and normally open (NO) contacts of the relay, allowing an external device to be switched on and off by the relay.
Open Project in Cirkit Designer
This circuit consists of a 5V battery powering a 4-channel relay module, which controls four LEDs (red, yellow, green, and blue) through individual resistors. Each relay channel is activated by a corresponding SPST toggle switch, allowing manual control of the LEDs.
Open Project in Cirkit Designer
This circuit consists of a DC-DC converter powering a 6-channel power module, which in turn supplies 5V to a 2-relay module. The power module distributes the converted voltage to the relay module, enabling it to control external devices.
Open Project in Cirkit Designer| Pin Number | Description | Type |
|---|---|---|
| 1 | VCC | Power |
| 2 | GND | Ground |
| 3 | IN1 | Input |
| 4 | IN2 | Input |
| 5 | COM1 (Common) | Output |
| 6 | NO1 (Normally Open) | Output |
| 7 | NC1 (Normally Closed) | Output |
| 8 | COM2 (Common) | Output |
| 9 | NO2 (Normally Open) | Output |
| 10 | NC2 (Normally Closed) | Output |
// Define relay control pins
const int relayPin1 = 2;
const int relayPin2 = 3;
void setup() {
// Set relay pins as output
pinMode(relayPin1, OUTPUT);
pinMode(relayPin2, OUTPUT);
// Initialize relays to OFF (Normally Open state)
digitalWrite(relayPin1, LOW);
digitalWrite(relayPin2, LOW);
}
void loop() {
// Turn on relay 1
digitalWrite(relayPin1, HIGH);
delay(1000); // Wait for 1 second
// Turn off relay 1
digitalWrite(relayPin1, LOW);
delay(1000); // Wait for 1 second
// Turn on relay 2
digitalWrite(relayPin2, HIGH);
delay(1000); // Wait for 1 second
// Turn off relay 2
digitalWrite(relayPin2, LOW);
delay(1000); // Wait for 1 second
}
Q: Can I control this relay with a 3.3V signal? A: While the relay operates at 5V, some 5V relays can be triggered with a 3.3V signal. However, it is best to check the datasheet or test the relay with a 3.3V signal to ensure reliable operation.
Q: Is it safe to control mains voltage with this relay? A: Yes, the relay can switch mains voltage, but you must ensure proper safety precautions and isolation. If unsure, seek professional assistance.
Q: Can I use PWM to control the relay? A: Relays are not designed for high-speed switching and using PWM is not recommended. They are intended for on/off control with a sufficient delay between switching.