01 Background

The RFID Door Lock Project was completed at Worcester Polytechnic Institute in 2014. Using an Arduino Micro, a 125 kHz RFID sensor, an encoder motor, and motor drivers, I designed and 3D printed a custom door lock mechanism that could be unlocked with RFID cards and tags. The project combined 3D modeling, 3D printing, electronics, and embedded programming.

02 Photos

Photos from the design and build process.

Printing 1 Layer to confirm hole alignment to save plastic - a perfect fit.

AutoCAD Drawing of how mechanical components were going to be linked.

Adding Metal Hardware - Linkages are working properly.

Engineering Drawings annotating lock position and motor rotation / underlying concepts.

Lots of 3D Modelling and Dimensioning. There is redundancy because AutoCAD Does not like Unions / Subtractions after they've been merged.

Countersunk screws to be flush with the back plate for clean and professional installation.

All screws are in place - and all of them are sitting flush to the backplate - Perfect.

Testing Backplate Orientation and fit along with possible mounting ideas for Breadboard / PCB.

Additional Prototyping on the Arduino Micro.

Final Design coming together, 9V Battery, Arduino Micro, Motor Driver, on Small Breadboard.

Final Breadboard alongside Final Backplate - Ready to go!

Had to extend the existing axle to reach the door lock as I've elevated it 3/8" from the Original Position.

This is the RFID Sensor I used, which works with 125 kHz Cards, Tags, and components. I can issue them to friends to have access to my dorm if I'm at class.