LED Gumball Machine

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Contributors: 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 Communication

Asynchronous serial communication concepts: packets, signal levels, baud rates, UARTs and more!

Voltage, Current, Resistance, and Ohm's Law

Learn about Ohm's Law, one of the most fundamental equations in all electrical engineering.

Raspberry Pi SPI and I2C Tutorial

Learn how to use serial I2C and SPI buses on your Raspberry Pi using the wiringPi I/O library for C/C++ and spidev/smbus for Python.

Lessons in Algorithms

Learn techniques on how to use Finite Impulse Response (FIR) filters and other data-processing tools to turn data into information.

Hazardous Gas Monitor

Build a portable gas monitor to check for dangerous levels of hazardous gases.

Spectral Triad (AS7265x) Hookup Guide

Learn how to wield the power of 18 channels of UV to NIR spectroscopy with AS72651 (UV), AS72652 (VIS), and AS72653 (NIR) sensors!

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.

How to Run a 5V Device On a 3.3V System With Qwiic

Power up your 5V I2C devices on the Qwiic system! This tutorial shows you how to use the SparkFun Qwiic 5V Boost to integrate power-hungry sensors like the SEN55 seamlessly.