# 3 Channel Relay Module Shield Smart Home for Raspberry Pi

**Type:** Product page · **SKU:** WS-11638 · **Brand:** [Waveshare](https://core-electronics.com.au/brands/waveshare-in-australia)
**Page:** https://core-electronics.com.au/3-channel-relay-module-shield-smart-home-for-raspberry-pi-3.html ([markdown](https://core-electronics.com.au/3-channel-relay-module-shield-smart-home-for-raspberry-pi-3.html.md))

Perfect for simple home-automation projects, this module allows your Raspberry Pi to control three independent relays, allowing you to easily control high-current loads while keeping your Pi safely isolated. All the necessary driver circuitry is on-board, and control is as simple as driving a GPIO pin high or low

## Pricing

- **Price:** $26.10 (inc GST) — $23.73 AUD, exc GST
- **Quantity discounts:** 10+ $22.78 (exc GST) · 25+ $22.06 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 21 today, and up to 300 more in 12–19 days.

## Description

Perfect for simple home-automation projects, this module allows your Raspberry Pi to control three independent relays, allowing you to easily control high-current loads while keeping your Pi safely isolated. All the necessary driver circuitry is on-board, and control is as simple as driving a GPIO pin high or low. Relays can be easily disconnected from their corresponding GPIO by removing an on-board jumper, allowing you to free-up unused channels for other purposes. Standoffs are included to help secure the module to your Pi.

To get you started, we have a simple python script that you can download (must have internet connection):

 ```
curl -L http://coreelec.io/34 >> relay-test.py
```

Then run it with

 ```
python relay-test.py
```

You should see the relays sequence on then off.

**Note:** This is compatible with all Pi 3 and 4 model B/B+ boards.

### Tech Specs:

- Relay contacts: SPDT
- Relay contact rating: 10A (30VDC / 250VAC)
- CH1: GPIO 26
- CH2: GPIO 20
- CH3: GPIO 21
 

### Dimensions:

![Board Dimensions](https://core-electronics.com.au/attachments/localcontent/RPi-Relay-Board-size_39019eaad5c.jpg)

- 3mm mounting holes
- Approximately 16mm tall with relays installed
- Female Pi headers on the bottom of the board are approximately 13.5mm tall
 
**Further reading:**

- www.waveshare.com/wiki/RPi\_Relay\_Board

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/c/e/ce04864.jpg)