LED Gumball Machine

A quick introduction to pull-up resistors - whey they're important, and how/when to use them.

Turn a large voltage into a smaller one with voltage dividers. This tutorial covers: what a voltage divider circuit looks like and how it is used in the real world.

A brief history of how ASCII came to be, how it's useful to computers, and some helpful tables to convert numbers to characters.

Dive into the basics of Radio Frequency Identification (RFID) technology.

Hook a light-sensing photocell up to an Arduino to create an ambient light monitor.

Control LEDs based on your movement using an accelerometer! Make your LEDs breathe by fading in and out when laying on the floor, turn off the LEDs when moving to your side, or make the LEDs blink in a headstand!

Measure relative humidity and temperature or your environment with the RHT03 (a.k.a DHT22) low cost sensor on a single wire digital interface connected to an Arduino!

In this tutorial, we will slowly turn on the load and then slowly turn it off using the N-channel MOSFET.