Relay Module Library For Proteus New | 4 Channel

Upload this code to your virtual Arduino in Proteus.

// Control 4 Channel Relay Module - Simulation Example
// Pins for the 4 relays
const int relayPins[4] = 8, 9, 10, 11;
void setup() 
// Initialize all relay pins as outputs
for (int i = 0; i < 4; i++) 
pinMode(relayPins[i], OUTPUT);
// Start with all relays OFF (For ACTIVE LOW module: HIGH = OFF)
digitalWrite(relayPins[i], HIGH);

void loop() 
// Sequence 1: Turn on Relay 1, wait, then Relay 2, etc.
for (int i = 0; i < 4; i++) 
digitalWrite(relayPins[i], LOW);  // Activate Relay (Active LOW)
delay(500);                       // Keep ON for 500ms
digitalWrite(relayPins[i], HIGH); // Deactivate Relay

// Sequence 2: All relays ON together
for (int i = 0; i < 4; i++) 
digitalWrite(relayPins[i], LOW);
delay(2000); // All ON for 2 seconds 4 channel relay module library for proteus new
// Sequence 3: All relays OFF
for (int i = 0; i < 4; i++) 
digitalWrite(relayPins[i], HIGH);
delay(1000);

The 4-Channel Relay Module in Proteus mimics the popular "Blue Relay Boards" found in the Arduino and Raspberry Pi ecosystem. It consolidates four 5V relays, their driver transistors, optocouplers (in most models), and status LEDs into a single schematic symbol and PCB package. Upload this code to your virtual Arduino in Proteus

| Parameter | Value | |--------------------|--------------------------------| | Channels | 4 | | Coil Voltage | 5V DC | | Control Signal | 3.3V / 5V logic (Active HIGH) | | Max Switching Load | 10A @ 250VAC / 30VDC (NO) | | Opto-isolation | PC817 (simulated as virtual) | | Indicators | 4x LEDs (one per relay) | | Interface | 4 inputs + VCC + GND | | Connector Type | 2x3 Male Header (or screw term)|

Author: Simulation Engineering Research Date: October 2023 (Updated for modern use) Software Version: Proteus 8.9 Professional or later

Solution: This is a simulation logic issue. The new library might have separate COM, NO, and NC pins. Make sure you are connecting the positive voltage to COM and the load to NO. In simulation, do not forget the current-limiting resistor for your output LEDs. void loop() // Sequence 1: Turn on Relay

The 4-channel relay module is a ubiquitous component in embedded systems, enabling low-voltage microcontrollers (3.3V/5V) to control high-voltage appliances (110V/250V AC). However, Proteus’s default library does not include a packaged 4-channel variant with opto-isolators, transistors, LEDs, and screw terminals. Engineers often resort to using four individual relays, which clutters schematics and fails to simulate the driver circuitry (e.g., ULN2803 or individual transistors).

As IoT and home automation grow, expect future library updates to include: