Electronic combination lock with PIC


Posted on Jul 19, 2012

This is my electronic combination lock to use with an outdoor gate. The functionality is implemented in software. It turns on a relay (usually to open a door) for a few seconds if someone enters the valid code. This relay can operate a power-to-open type electric strike with a shorting contact or a power-to-hold type electromagnetic lock with a breaking contact (we need the relay because these locks usually work with AC, not DC). The code can be changed any time after entering the current code.


Electronic combination lock with PIC
Click here to download the full size of the above Circuit.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Car PC MP3 Player
3-30 V/2.5 A Stabilized variable power supply
Electronic jam circuit diagram
ir remote controlled switchboard rc5
make 6v 4ah automatic battery charger
dcf77 preamplifier schematics
Flyback Transformer Drivers
Arduino CAN Bus Interface
cars brake lights monitor circuit
2Y-Y-2 - connection four-speed motor contactor control circuit



Top