Fingerprint Sensor AS608 - A Beginner's Guide
One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan.
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This module is a 4x4 keypad membrane matrix that is connected using 8 digital pins. It has a size of 70mm x 77mm x .8mm pad size, with its cable length of 85mm. It also has 8 female Dupont headers that can be connected to your Arduino through the digital pin.
The input power is up to 35V with 100mA current.
It works by having the 4 pins connected to the column pins and the other 4 to the rows pins.
It detects a pressed button by checking which row pin and column pin states changed.
It is easier to add this to your project than having a series of tactile switches. It only needs 8 pins of your Arduino digital pin to control 16 buttons.
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