Learn to build an RFID based attendance system using Arduino with step-by-step instructions, circuit diagrams, and complete code. This $35 DIY project replaces expensive commercial systems with ...

The project includes 3D-printed parts, wooden supports, and a repurposed mini conveyor belt.The working combines stepper motors, IR sensors, and a 16x2 LCD.A NEMA17 stepper motor is used to rotate the ...

While the I²C bus is theoretically capable of running for years without interruption, in practice, sensors eventually “lock up,” halting communication across the entire bus. A simple transistor ...

The frequency of the mains voltage serves as a reliable indicator of the electrical grid’s load. The grid frequency meter outlined here monitors both this critical parameter and the mains voltage of ...

This repository contains a collection of circuit designs for educational purposes using **Arduino** and simulated with **Tinkercad Circuits**. All board layouts are provided as `.brd` files for ...