WARNING: IT SEEMS THE STEPPERMOTOR HAS NOT ANOUGHT TORQUE TO MOVE THE KEY!!! IF U KNOW A SUITABLE MOTOR, PLS LEAVE A COMMENT!
28byj-48 Stepper driven Key(un)locker
This device is made to control double-side usable doorlocks. It can turn the key inside the door to close or open the door.
You can glue four 10x6mm neodyms for metal-door-snapping in the bottom wholes.