# Trinket React Counter

## Overview

![](https://cdn-learn.adafruit.com/assets/assets/000/031/185/medium800/3d_printing_hero-thumb-02.jpg?1457907037)

## "Physical" Like Button

Inspired by Facebook "Reactions". You press the button, and the number count gets displayed on the LED screen.

Looks like a novelty product, but this can be used for all sorts of useful stuff like keeping track of attendees at an event, keep track of a score for a game or anything else that needs a tally counter.

![](https://cdn-learn.adafruit.com/assets/assets/000/031/186/medium800/3d_printing_hero-heart-02.jpg?1457907047)

## Customize it, Make it!

The really cool thing about this is that you can build your own with a just few components and a 3D printed case.

To make your own, you'll need an Adafruit Trinket, a 7-segment LED display and an Arcade button.

## Prerequisite Guides

Please take a moment to walk through the following guides to get a basic understanding of the components used in this project. 

- [Introducing Adafruit Trinket](../../../introducing-trinket)
- [Adafruit LED Backpacks](../../../adafruit-led-backpack)

![](https://cdn-learn.adafruit.com/assets/assets/000/031/184/medium800/3d_printing_parts.jpg?1457906921)

## Parts

You'll need the parts listed below to complete this project.

- [5V/3.3V Adafruit Trinket](https://www.adafruit.com/categories/261)
- [0.56" 7-Segment Display](https://www.adafruit.com/products/879)
- [30mm Arcade Button](https://www.adafruit.com/products/471)
- [Adafruit LED Sequin](https://www.adafruit.com/products/1758)

## Tools & Supplies

You'll also need the following tools and supplies. If you don't have access to a 3D printer, you can have a local maker ship the parts to you via [3DHubs.com](http://3dhubs.com/)

- [Soldering Iron w/ Solder](https://www.adafruit.com/categories/84)
- [3D Printer](https://www.adafruit.com/categories/245) + [Filament](https://www.adafruit.com/products/2080)
- [26AWG Silicone Coated Wires](https://www.adafruit.com/products/1970)
- 4x #4-40 3/8 machine screws
- 4x #2-56 3/8 machine screws
- Super Glue
- [MicroUSB cable](https://www.adafruit.com/products/592) + 5V power supply / Battery Pack
- [Helping Third Hands](https://www.adafruit.com/products/291)
- [Panavise Jr.](https://www.adafruit.com/products/151)

![](https://cdn-learn.adafruit.com/assets/assets/000/031/028/medium800/3d_printing_hero-thumb-01.jpg?1457644723)

- [Next Page](https://learn.adafruit.com/trinket-react-counter/software.md)

## Related Guides

- [Adafruit LED Backpacks](https://learn.adafruit.com/adafruit-led-backpack.md)
- [PyPortal Alarm Clock](https://learn.adafruit.com/pyportal-alarm-clock.md)
- [Glowing Viking Rune wayFinder](https://learn.adafruit.com/glowing-viking-rune-artifact.md)
- [Arcade Stick Conversion](https://learn.adafruit.com/arcade-stick-conversion.md)
- [Custom Controllers for MakeCode Arcade](https://learn.adafruit.com/custom-controllers-for-makecode-arcade.md)
- [Arduboy Game Controller Hack](https://learn.adafruit.com/arduboy-game-controller.md)
- [Guardian Robot – Zelda BOTW](https://learn.adafruit.com/guardian-robot-zelda-botw.md)
- [Soundboard Speaker for Bikes & Scooters](https://learn.adafruit.com/soundboard-speaker-for-bikes-scooters.md)
- [Adafruit Arcade Bonnet for Raspberry Pi](https://learn.adafruit.com/adafruit-arcade-bonnet-for-raspberry-pi.md)
- [Theme Park Wait Time Display](https://learn.adafruit.com/park-wait-time.md)
- [Arcade Fightstick](https://learn.adafruit.com/arcade-fightstick.md)
- [Camera LED Ring Light](https://learn.adafruit.com/camera-ring-led-light.md)
- [NeoPixel Bracelet](https://learn.adafruit.com/neopixel-bracelet.md)
- [Capacitive Touch Unicorn Horn](https://learn.adafruit.com/capacitive-touch-unicorn-horn.md)
- [RGB LED Matrix Cube with 25,000 LEDs](https://learn.adafruit.com/rgb-led-matrix-cube-for-pi.md)