6 Digit Coded Ac Power Switch Circuit

Posted on Dec 28, 2012

This switch uses four CD4013 BE dual flip-flops, an inverter, and an optoisolator to drive a triac. The circuit can switch 25-A ac load current. A standard 4x3 telephone keyboard is used to enter a 6-digit code. In case of a wrong code, a signal is available to activate ah alarm.

6 Digit Coded Ac Power Switch Circuit
Click here to download the full size of the above Circuit.

The disarming method is a secret reset button that can be any number on the keyboard.

Leave Comment

characters left:

New Circuits



Popular Circuits

Switch mode power supply
12Vdc Mobile Battery Charger
Schematic Diagram 12v battery charger circuit
motor control
1MHZ Digital Frequency Meter
Amplifier Output Delay with Relay Schematic Diagram
What should I take in account when using a more powerful triac
Super Sequencer?® With Margining Control And Auxiliary ADC Inputs
Flyback Transformer Driver Circuit
Refrigerator power protection circuit
CD4520 CD4511 CD4067 digital automatic inspection circuit diagram