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!
Pull-up Resistors
A quick introduction to pull-up resistors - whey they're important, and how/when to use them.
Pulse Width Modulation
An introduction to the concept of Pulse Width Modulation.
Programming an FPGA
Come look at the basics of working with Field Programmable Gate Arrays.
First FPGA Project - Getting Fancy with PWM
An initial project using Alchitry's onboard FPGA to manipulate PWM
Vernier Shield Hookup Guide
A guide to using the Vernier Shield
HMC6343 3-axis Compass Hookup Guide
How to hook the HMC6343 -- a high-end, tilt-compensated compass module -- up to an Arduino. Never get lost again!
Interactive LED Music Visualizer
Use an Arduino and the SparkFun Sound Detector to create visualizations on Addressable RGB LED strips.
Air Quality Sensor - SGP40 (Qwiic) Hookup Guide
Get started measuring indoor air quality with the SparkFun Air Quality Sensor - SGP40 (Qwiic) Hookup Guide.