5V Single Channel Relay Module for Arduino & Raspberry Pi
5V Single Channel Relay Module (5V Coil, 10A/250VAC)
This 5V single-channel relay module provides a safe and convenient way to control high-voltage AC/DC loads up to 10A at 250VAC using any 3.3V or 5V microcontroller like Arduino, ESP32, or Raspberry Pi.
Key Specifications
| Coil Voltage | 5V DC |
| Trigger Voltage | 5V (3.3V logic compatible) |
| Maximum Switching Voltage (AC) | Up to 250V |
| Maximum Switching Voltage (DC) | Up to 30V |
| Maximum Switching Current | 10A |
| Isolation Type | Optocoupler (PC817) |
| Relay Type | SPDT (Single Pole Double Throw) |
What You Can Build With This
- Automatic Plant Watering: Combine a soil moisture sensor and a relay‑controlled pump to water plants automatically with Arduino Uno.
- Smart Light Control: Use an ESP32 and Blynk app to switch a table lamp remotely – a beginner IoT home automation project.
- Web‑Controlled Appliance: Build a Raspberry Pi web server that toggles a household fan or light from any browser on your network.
- Automated Streetlight Model: CBSE Class 12 physics practical – create a working LDR‑based automatic streetlight with relay switching.
- IoT Energy Manager: B.Tech final‑year project – design a load scheduling system using ESP32, relay modules, and a dashboard for Smart India Hackathon.
Compatibility
| Platform | Compatible | Connection | Library / Method |
|---|---|---|---|
| Arduino Uno R3 | Yes | VCC→5V, GND→GND, IN→D2 | digitalWrite (built‑in) |
| Arduino Nano | Yes | VCC→5V, GND→GND, IN→D2 | digitalWrite (built‑in) |
| Arduino Mega 2560 | Yes | VCC→5V, GND→GND, IN→D2 | digitalWrite (built‑in) |
| ESP8266 NodeMCU | Yes | VCC→Vin (5V), GND→GND, IN→D1 (GPIO5) | digitalWrite (Arduino IDE) |
| ESP32 Dev Board | Yes | VCC→5V pin, GND→GND, IN→GPIO23 | digitalWrite (Arduino IDE) |
| Raspberry Pi Pico | Yes | VCC→VBUS (5V), GND→GND, IN→GP0 | MicroPython Pin class |
| Raspberry Pi 4 / 5 | Yes | VCC→pin 2 (5V), GND→pin 6, IN→GPIO17 (pin 11) | RPi.GPIO / gpiozero (Python) |
Wiring and Interface Notes
Standard wiring: VCC to 5V pin, GND to ground, IN to digital GPIO. The relay typically activates on a LOW signal (active‑low) — verify with your module. Use a safety enclosure and never touch contacts when powered, especially with AC mains.
Frequently Asked Questions
Is this relay module active‑high or active‑low?
Most 5V single‑channel relay modules are active‑low; the relay energizes when the IN pin is pulled to GND. Check the jumper or module markings, as some can be reconfigured.
Can I use this relay with a 3.3V microcontroller like ESP32?
Yes, the module's optocoupler and transistor driver allow triggering with a 3.3V logic signal, provided you separately power the relay coil with 5V. All our microcontroller boards support 5V output pins.
What you can build with this
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items