Keyestudio AD KEY Button Module for Arduino

The Keyestudio AD KEY Button Module is a clever input expansion board designed for Arduino makers, hobbyists, and students who need multiple buttons without exhausting their microcontroller's pins. By utilising a single analog port to read five separate tactile buttons, this module frees up valuable digital I/O pins for other sensors and actuators. It is an ideal solution for building compact control interfaces, custom gamepads, and navigation menus.

Conserve microcontroller I/O ports

Traditional setups require a dedicated digital port for every single button, which quickly wastes your microcontroller's limited I/O resources. This module solves that by routing five tactile buttons through a single analog pin, letting you expand your project's inputs efficiently.

Voltage-dependent analog readings

Because the module maps five buttons to one analog input, the read value depends directly on your supply voltage. Note that pressing multiple buttons simultaneously will return the minimum analog value associated with those pressed buttons.

Convenient physical mounting holes

Integrating this input module into your custom chassis, control panel, or robot frame is straightforward. It features four pre-drilled fixing holes with a 3mm diameter for secure mounting on any device.

Standard three-pin interface

The module uses a 3-pin communication port with a standard 2.54mm pitch, making it highly compatible with common breadboards and jumper wires. It operates reliably on a working voltage range of DC 3.3V to 5V.

Compact and lightweight design

Measuring just 68mm by 37mm by 16mm and weighing only 13.8g, this board fits easily into tight DIY enclosures. It is also ROHS compliant, ensuring it meets environmental safety standards.