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!
Serial Peripheral Interface (SPI)
SPI is commonly used to connect microcontrollers to peripherals such as sensors, shift registers, and SD cards.
Voltage Dividers
Turn a large voltage into a smaller one with voltage dividers. This tutorial covers: what a voltage divider circuit looks like and how it is used in the real world.
Logic Levels
Learn the difference between 3.3V and 5V devices and logic levels.
LogicBlocks & Digital Logic Introduction
Introducing fundamental digital logic concepts and LogicBlocks
MLX90614 IR Thermometer Hookup Guide
How to use the MLX90614 or our SparkFun IR Thermometer Evaluation Board to take temperatures remotely, over short distances.
Rotary Dial Kit Assembly Guide
Put together your Rotary Dial Kit and light it up with our Arduino example code!
RHT03 (DHT22) Humidity and Temperature Sensor Hookup Guide
Measure relative humidity and temperature or your environment with the RHT03 (a.k.a DHT22) low cost sensor on a single wire digital interface connected to an Arduino!
Qwiic Ultrasonic Distance Sensor (HC-SR04) Hookup Guide
Get started with the Qwiic Ultrasonic Distance Sensor!