Appliance HAT Mini

The Appliance HAT Mini is the little brother to our Appliance HAT with two 16A / 250V AC rated power relays instead of six. Designed for use with Raspberry Pi Zero and other pin-compatible SBCs (single board computers).

Unlike similar products, the Appliance HAT Mini does not require any screw terminals or PCB wire connections. Instead it uses quick connect power relays with integrated spade terminals, which allows two 16A / 250V AC rated power relays to fit onto a single zero sized HAT.

Featuring the well-documented MCP23017 16 channel GPIO expander, the Appliance HAT Mini is easy to setup and control via I2C. It can be used with any device featuring an I2C bus and works with 3.3V or 5V devices (eg, Arduino); by selecting the appropriate jumper (see device compatibility). Channels 0-1 (group A) are utilised for the relays, giving you an extra 14 GPIOs for use with your project.

The Appliance HAT Mini is powered through the host Raspberry Pi using the GPIO port and can be used in-conjunction with other expansion boards (check-out our HAT RACK mounting board). Up to eight Appliance HAT Minis can be used with a single Raspberry Pi. The relays can be powered separately by removing the jumper marked “Link”, so you can use an external supply to power the relays, reducing the load on the Raspberry Pi. Use of an external power supply is recommended if you plan to connect multiple HATs to your Raspberry Pi.

Features

• 2 opto-isolated quick connect power relays with LED indicators
• Up to 16A @ 250V AC
• Easy to use interactive web GUI
• Based on the MCP23017 16-port GPIO expander
• Jumper selectable I2C address & GPIO voltage (3.3V / 5V)
• Can be used with 3.3V or 5V I2C host devices (eg, Arduino)

What’s Included

• 1x Appliance HAT Mini
• 2x Jumper Links

Interactive Web GUI

Once installed on your Raspberry Pi, this interactive GUI allows quick & easy control of your Appliance HAT Mini without the need for any coding. It is designed to be both a user guide & quick reference to the Appliance HAT Mini pinout. The GUI is fully responsive and adapts to any screen size.

Check-out the Live Demo.

Device Compatibility

The Appliance HAT Mini is fully compatible with all 40-way Raspberry Pi models and clones.

To use with Arduino or any other 5V device the 3V3 jumper must be moved to 5V.
Use the SDA & SDL breakout pins for I2C communication.

I2C Address Selection

Schematic Diagram

Dimensions

Compliance

• UL 796 certified manufacturer
• RoHS compliant (lead free)
• CE & UKCA marked

Datasheets

• Microchip MCP23017
• RZF1 1A6 L005

You can find this and our other Raspberry Pi projects on our GitHub page.