Want your robot to “see” a line without using a camera or heavy image processing? The QTR-8RC Reflectance Sensor Array gives you eight reflectance readings across a single bar, so your robot can sense where the line is under it. When the array passes over black tape on a white surface, the readings shift clearly…
One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan. When a finger is recognized, the LCD shows a friendly “Welcome” message and you can trigger an unlock action later. When it fails, the LCD clearly shows “Access denied,” so the user…
Ever wished your Arduino could “talk back” when you move a joystick? In this tutorial, you will build a clean direction viewer that prints UP, DOWN, LEFT, RIGHT, or CENTER on a 16×2 I2C LCD as you move the stick. This makes joystick behavior easy to confirm without guessing or staring at the Serial Monitor.
Don’t wait until your full project is done to find out your BTS7960 43A motor driver has a problem. A fast bench test can catch wiring mistakes, weak power, or bad behavior before they cost you time and parts. This guide uses a short Arduino sketch that makes the motor run forward, stop, reverse, and stop again in a loop.
If you’re coming from Arduino Uno, the Raspberry Pi Pico can feel confusing at first—especially when it doesn’t immediately show a COM port. Sometimes it appears as a USB drive or a UF2 board, and beginners assume something is broken.
Tap a button on your phone and watch an LED light up across the room. This External LED via Wi-Fi turns an ESP32 into a tiny web server that hosts a page with ON/OFF buttons.
Bring the faucet to your desk. If the shared dispenser is a walk away, this pocket-size 3D Mini Water Dispenser puts a spout right beside your cup. Press the button and water flows; release and it stops—simple, fast, and tidy.
Press power, watch color happen. This beginner-friendly project drives a 64-pixel (8×8) NeoPixel matrix from an Arduino and paints it with a smooth, rotating rainbow.
Boot. Play. Sing. As soon as you power on, the 3D DIY Soundbox. There is no phone, no pairing, and no app—just instant music with on-device lyrics.. 𝄞
Running out of pins? Imagine reading 16 sensors with only one Arduino input. That’s what the HP4067 does:
