Looking for practical Arduino projects? This guide shows how to control a relay from your smartphone using an Arduino Uno — either via Bluetooth or Wi-Fi.

A 10-pack of the HC-SR04 sensors costs $13 on Amazon, and if you need some jumper wires you can pick up a bunch for about $10. Finally, you'll need the trash can itself to pull the whole project ...

It runs on an Arduino MEGA 2560 PRO (or similar microcontroller) and supports a wide array of additional hardware including pressure transducer, water level sensor, flow meter, OLED display, and more.

While you typically only see holograms in sci-fi movies and shows, there's a way to bring them to life with the help of Arduino Nano. A beginner-friendly Nano-powered hologram project is this ...

The Nano 33 BLE Sense (Rev2 in photo) has the same 9-axis swap for Revision 2, and some changes in its other sensors: The microphone was a MP34DT05 (ST) and is now a MP34DT06JTR (ST) in rev 2. Gesture ...