An easily implementable signal conditioning circuit for resistive humidity and temperature sensors is presented. It is based on a relaxation oscillator in which both the frequency and the duty-cycle ...

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 ...

Design and development of novel smart chipless humidity sensor tag has been proposed. A key approach introduced in this paper for the first time is to utilize ground plane chipless RFID (Radio ...

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 ...