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DS3231 real-time clock projects

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RFID Attendance Logger using ESP32 — project thumbnail preview
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RFID Attendance Logger using ESP32

This project builds a contactless attendance system where students tap RFID cards or tags on an RC522 reader connected to an...

DS3231 real-time clock ESP32 DevKit RC522 RFID reader
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Smart Door Lock using RFID with Access Logging — project thumbnail preview
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Smart Door Lock using RFID with Access Logging

This project builds a smart door lock around an ESP32 and an RC522 RFID reader: authorized RFID tags unlatch a solenoid-drive...

DS3231 real-time clock Arduino IDE 16x2 character LCD
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