So in this project, we are going to build a prototype of a Biometric voting machine using the Arduino Uno, TFT display, and Fingerprint Sensor. We previously used R305 Fingerprint Sensor with NodeMCU to build a Biometric based Attendance System but here we will use the advanced GT-511C3 fingerprint sensor with Arduino.
For an easy plotter design that you can build with only simple hand tools, be sure to check out this tiny project from Mr Innovative. The machine features a pair of stepper and lead screw assemblies to maneuver a pen in an X/Y plane, along with a clever string and servo setup to handle retraction.
How To Build An Arduino
An Arduino Nano and two L293D ICs mounted to a custom PCB are used to control the device, though a breadboard could certainly substitute for the PCB in a pinch. Drawings are translated into the proper format via Inkscape and Processing.
More details on the miniature machine, including code, can be found in Mr Innovative’s write-up.