LED Gumball Machine
Contributors:
Nate
Nate 
Resources and Going Further
We hope you've enjoyed reading about our LED dispensing gumball machine. If you liked this one, there's tons more!
Logic Levels
Learn the difference between 3.3V and 5V devices and logic levels.
Button and Switch Basics
A tutorial on electronics' most overlooked and underappreciated component: the switch! Here we explain the difference between momentary and maintained switches and what all those acronyms (NO, NC, SPDT, SPST, ...) stand for.
Digital Logic
A primer on digital logic concepts in hardware and software.
MIDI Tutorial
Understanding the Musical Instrument Digital Interface.
TMP102 Digital Temperature Sensor Hookup Guide
How to connect and use the SparkFun Digital Temperature Sensor Breakout - TMP102 with an Arduino.
Qwiic IR Array (MLX90640) Hookup Guide
The Melexis MLX90640 contains a 32x24 array of thermopile sensors creating, in essence, a low resolution thermal imaging camera. In this guide, we’ll go over how to connect your Qwiic Infrared Array with MLX90640 and get it communicating with Processing to produce a nice thermal image.
Qwiic Proximity Sensor (VCNL4040) Hookup Guide
The SparkFun Qwiic Proximity Sensor is a great, qualitative proximity (up to 20 cm) and light sensor. This hookup guide covers a few examples to retrieve basic sensor readings.
SparkFun Qwiic Digital Temperature Sensor - TMP102 Hookup Guide
Get started using your SparkFun Digital Temperature Sensor - TMP102 (Qwiic) with this Hookup Guide!