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Ultra-Slim Round Fingerprint Sensor and 6-pin Cable : ID 4750 : $19.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Interfacing R307 Optical Fingerprint Scanner with Arduino Boards for Biometric Authentication - CIRCUITSTATE Electronics
GitHub - adafruit/Adafruit-Fingerprint-Sensor-Library: Arduino library for interfacing to the fingerprint sensor in the Adafruit shop
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