After this tedious step, he designed a PCB that hosts an Arduino Nano to accept input, two MCP23017 GPIO expanders to give it enough outputs, and CD4066BE CMOS switches to trigger the connections.

RFID Attendance System Circuit Diagram Below you can see the circuit diagram used in the RFID-based attendance system project. If you are completely new to using RFID, you can check out this tutorial ...

CrowPi 3 is a Raspberry Pi 5-powered all-in-one portable AI learning and development platform with a 4.3-inch touchscreen display, plenty of plug-and-play electronic modules, a breadboard area, and ...

Hardware Components ESP32: Microcontroller for handling RFID data and communication with the server. RFID-RC522 Reader: Reads RFID card data for user authentication. OLED Display: Shows user details ...

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Browse 500+ Arduino projects with downloadable code and circuit diagrams. Complete tutorials for beginners and advanced makers.