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Relay Control PCB
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A bare PCB for building a relay control circuit, based on SparkFun's Controllable Power Outlet tutorial. It allows you to switch high-voltage loads using a s...
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A bare PCB for building a relay control circuit, based on SparkFun's Controllable Power Outlet tutorial. It allows you to switch high-voltage loads using a simple 0–5V GPIO signal from any microcontroller. Components must be sourced and soldered separately.
Key Features
- Bare PCB – Solder your own components for a custom relay controller
- GPIO Controlled – Switch with a 0–5V signal from any microcontroller
- High-Voltage Switching – Control mains-powered devices safely
Warning: This project involves high-voltage mains wiring. Only attempt this if you are experienced with mains electrical work and understand the safety risks involved.
Ideal For
- Microcontroller-switched power outlets
- Home automation relay circuits
- Learning relay control electronics
Package Contents
- 1× Relay control PCB (bare board, components not included)
Jargon buster
Plain-language definitions for the technical terms used above.
- GPIO
- General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- PCB
- A printed circuit board is a rigid board with copper tracks that connect electronic parts without loose wires. For this kit, the PCBs also form the airplane shape, so they are both the circuit base and part of the finished model.
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