LED Gumball Machine
Contributors:
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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!
I2C
An introduction to I2C, one of the main embedded communications protocols in use today.
Digital Logic
A primer on digital logic concepts in hardware and software.
Introduction to MQTT
An introduction to MQTT, one of the main communication protocols used with the Internet of Things (IoT).
External IO and Metastability
Why external signals can cause metastability and how to use constraint files to manage this
Touch Potentiometer Hookup Guide
Learn how to use the SparkFun Touch Potentiometer to control lighting, volume or other inputs in your daily life.
Sensor Kit Resource Hub
An overview of each component in the SparkFun Sensor Kit, plus links to tutorials and other resources you'll need to hook them up.
H3LIS331DL Accelerometer Breakout Hookup Guide
Hookup guide and library usage details for the triple axis accelerometer H3LIS331DL high-g accelerometer.
Single Supply Logic Level Converter Hookup Guide
The Single Supply Logic Converter allows you to bi-directionally translate signals from a 5V or 3.3V microcontroller without the need for a second power supply! The board provides an output for both 5V and 3.3V to power your sensors. It is equipped with a PTH resistor footprint for the option to adjust the voltage regulator on the low side of the TXB0104 for 2.5V or 1.8V devices.