Arduino Fingerprint Door Lock Project 11:17 am September 14, 2018 By Julian Horsey ...

An optical fingerprint sensor, which most notably ships in the OnePlus 6T, works exactly how the name suggests: there is a CMOS chip under the display that takes a picture of your finger.

This system was designed for a garage door. The bistable relay serves to disable the communication between the sensor and the Arduino in case there are more than 3 false scanner fingerprints, or ...

Ron Amadeo In this iFixit teardown picture, you can see the ultrasonic fingerprint sensor hardware on the back side of the display. The gray rectangle is the sensor area. iFixit ...