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!
Metric Prefixes and SI Units
This tutorial will explain how to use and convert between the standard metric prefixes.
Connectivity of the Internet of Things
An overview of the different protocols that can be used for the development of Internet of Things (IoT)-based projects.
External IO and Metastability
Why external signals can cause metastability and how to use constraint files to manage this
Monitor Sensor Data from Anywhere
Using WiFi to send sensor data from an ESP32 to a WiFi network and be able to read it from an IoT Dashboard from anywhere in the world.
HIH-4030 Humidity Sensor Hookup Guide
Measure relative humidity with SparkFun's HIH-4030 Humidity Sensor Breakout.
APDS-9301 Sensor Hookup Guide
The APDS-9301 sensor is an I2C connected luminosity sensor which returns measurements in lux.
Fingerprint Scanner (GT-521Fxx) Hookup Guide
This tutorial provides information about how to connect to ADH-Tech's fingerprint scanner (GT-521F32) and how to use it with Hawley's FPS_GT511C3 library for Arduino.
Programming the SparkFun Edge with Arduino
Running low-power machine learning examples on the SparkFun Edge can now be done using the familiar Arduino IDE. In this follow-up to the initial Edge tutorial, we'll look at how to get three examples up and running without the need to learn an entirely new SDK.