A simple RFID locking system for my shed but without putting anything outside so I didn't haft to make anything weather-proof. Luckily the RFID range easily went through the window of my shed so I designed a case to hold it in the corner of the window and then a case to hold the raspberry pi and relay switch.

I use a solar power system in my shed and I already have a lot of LED's on it and found the Lock would not engage whilst the lights were on so I implemented a button (link below) that would tell the Pi to break the circuit of the light with the relay and in turn connect the circuit for the lock.

I decided to add the 5v fan to the control box as my shed is insulated and gets quite hot so I didn't want the Pi to overheat.

The case for the RFID reader worked really well so I might create some variations of it for mounting on a wall when I get time.

Parts Used:

-RC522 RFID reader
-Green LED
-Red LED
-2 x 330Ω resistors
-1-Relay 5V KY-019 Module
-Raspberry Pi Zero W
-5v fan (optional)
-DC12V Electronic Door Lock B3H3
-Tactile Switch
-4 x M3 10mm Bolts and Nuts

Button Holder: [https://www.thingiverse.com/thing:2235586](https://www.thingiverse.com/thing:2235586)

Print instructions

All printed in PETG to better hold up to the heat in my shed. Supports needed on Control Box and Control Box Lid.
0.15 Layer Height