Combination Lock Circuit

Posted on Nov 19, 2012

This circuit is very basic to build. To open a the lock which is connected to the K1 Load you must press each momentary switch in the correct sequence. The sequence used in this circuit is S1,S2,S3,S4. If any of the other switches are pressed the circuit will reset and you will need to start over. Depending on how you wire the switches, you can use any 4 switch combination.

Combination Lock Circuit
Click here to download the full size of the above Circuit.

Leave Comment

characters left:

New Circuits



Popular Circuits

Dual polarity power supply
Simplest atmega8 programmer Using LPT Port
ssb add on for am receivers
make usb password generator for
video signal amplifier circuit diagram
8051 Development System Circuit Board 3
MFOS Mini-Controller circuit
ADA4858-3 used as a PIN diode driver circuit
Broadband high frequency amplifying circuit