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!

What is a Circuit?

Every electrical project starts with a circuit. Don't know what a circuit is? We're here to help.

Analog to Digital Conversion

The world is analog. Use analog to digital conversion to help digital devices interpret the world.

LogicBlocks & Digital Logic Introduction

Introducing fundamental digital logic concepts and LogicBlocks

Sending Sensor Data Over WiFi

This tutorial will show you how setup a simple peer-to-peer connection to send and receive sensor data between two ESP32 WiFi boards.

Creating a Humidor Control Box

Because some of our boards need to be re-humidified after reflow, we decided to make our own humidor. This tutorial will focus on how to model a project in 3D and then fabricate it using a CNC routing machine.

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.

Qwiic Proximity Sensor (VCNL4040) Hookup Guide

The SparkFun Qwiic Proximity Sensor is a great, qualitative proximity (up to 20 cm) and light sensor. This hookup guide covers a few examples to retrieve basic sensor readings.

Qwiic Ultrasonic Distance Sensor (HC-SR04) Hookup Guide

Get started with the Qwiic Ultrasonic Distance Sensor!