August 29, 2021
LED circuit

The Basics of Arduino: Adjusting LED Brightness

Originally published by Feb 5, 2020 Table of Contents Introduction Brightness cannot be digitally adjusted Changing LED brightness using digital output Adjusting brightness with PWM Making […]
August 29, 2021
arduino preprocessor

Arduino Preprocessor Directives Tutorial

Originally published by Jun 6, 2017 Table of Contents Introduction What do I need to get started? How it works After you press “Upload” Preprocessor basics […]
August 6, 2021
How to control an Arduino from a Windows computer

How to control an Arduino from a Windows computer

Arduino projects make it possible to build your own custom electronics, but that doesn’t mean they can’t interact with your regular gadgets like your laptop or […]
August 5, 2021
nRF24L01+

How to Use the NRF24l01+ Module with Arduino

Originally published by Apr 13, 2017 Table of Contents Introduction Specs Step by Step Guide to Using an NRF24l01+ Module with Arduino Related Articles Introduction Previously, […]
July 1, 2021
How to control your computer using hand gestures

How to control your computer using hand gestures

Scrambling to find the mute key when an annoying video starts playing or when someone walks into your office can be a hassle. You have to […]
June 3, 2021
Enter the Matrix, LED Matrix that is! Create your very own light up LED display with Arduino

Enter the Matrix, LED Matrix that is! Create your very own light up LED display with Arduino

A single LED can be handy in testing Arduino projects. But when you add an LED matrix, you can get really creative, spelling out letters, numbers, […]
May 17, 2021
Keep cats at bay with an auto-trigger water spray and the power of an Arduino Uno

Keep cats at bay with an auto-trigger water spray and the power of an Arduino Uno

If you want to keep the cats off the counter, a squirt bottle is an easy discipline method. However, you can’t always be in the room. […]
February 14, 2021

How to Send IR Commands to Your Project with a Remote Control

You might already know that the remote control for your TV uses infrared light that’s invisible to the naked eye to send coded signals instructing the […]
February 14, 2021

How to Program an RFID Card for Your Projects

RFID tags are small, rewritable chips that can store small amounts of data like names, addresses, product information, and more. They can take the form of […]
February 14, 2021

How to Add a Digital Numerical Display to Your Project

In the past, we’ve shown how to control an LED matrix with an Arduino. However, if your project only needs to show numbers, you might be […]
January 31, 2021

How to Find Out When Your Plants Need Watering with a Soil Sensor

It’s important to keep your plants watered and healthy. However, if you struggle to remember if you’ve watered them or want to get a reminder, you […]
January 15, 2021

How to Use a Relay to Control Lamp or Other High-Voltage Electronics

Arduino boards are useful for controlling low-voltage electronics like LEDs, small servos, and sensors. But when you want to control something bigger—for example, a lamp or […]