SparkFun
SparkFun Qwiic Button - Red LED
The SparkFun Qwiic Button simplifies adding a tactile button to your I2C project. It handles debouncing, pull-up resistors, and polling internally, so you ca...
The SparkFun Qwiic Button simplifies adding a tactile button to your I2C project. It handles debouncing, pull-up resistors, and polling internally, so you can focus on your application. A built-in red LED provides visual feedback and can be configured to blink at custom rates.
Each button has a configurable I2C address, allowing you to daisy-chain multiple Qwiic Buttons and address each one individually. An onboard FIFO queue records button press timestamps, and configurable interrupts can trigger on press or click events — freeing your microcontroller from constant polling.
Key Features
- Built-in Red LED – Configurable blinking for visual feedback
- I2C Interface – Configurable address for daisy-chaining multiple buttons
- Hardware Debouncing – Clean button signals without software workarounds
- Configurable Interrupts – Trigger on button press or click events
- FIFO Queue – Onboard record of button press timestamps
- Qwiic Connectors – Polarised 4-pin JST for solderless I2C hookup
Ideal For
- User interface controls in I2C-based projects
- Multi-button panels via daisy-chained addressing
- Event-driven applications requiring interrupt-based input
Package Contents
- 1× SparkFun Qwiic Button (Red LED)
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- FIFO
- FIFO stands for “first in, first out” and is a small memory buffer inside the sensor that stores recent readings in order. This matters because it can help capture motion data without the microcontroller needing to read the sensor every single instant.
- I2C
- I2C is a two-wire communication bus used by many sensors and small modules. It matters because several I2C devices can share the same two wires, but each device needs a compatible address and your controller must support I2C.
- I2C address
- An I2C address is the number a device uses so a microcontroller can tell it apart from other devices on the same I2C bus. It matters because two devices with the same fixed address may conflict if used together.
- LED
- A light-emitting diode is a small electronic component that lights up when current flows through it in the correct direction. In this kit, LEDs create the flashing effect, so polarity and correct soldering matter for the project to work.
- 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.
- Qwiic
- Qwiic is a plug-in connector system for I2C devices that uses small 4-pin cables, so you can connect compatible sensors without soldering. It matters because your controller or adapter also needs Qwiic, or you will need a cable or breakout to wire it up.
Find this product in
SparkFun Qwiic Button Schematic
Schematic · 52.2 KB · Click any page to view full size
SparkFun Qwiic Button I2C Register Map
Document · 62.5 KB · Click any page to view full size
Supplier page — sparkfun.com
Supplier Description · 796.0 KB · Click any page to view full size
Resources & Downloads
Guides, code examples, and more
Related Tutorials
Free guides on learn.littlebird.com.au
