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CD4001 based on Car Alarm Circuit

CD4001 based on Car Alarm CircuitCD4001 based on Car Alarm Circuit

This is a simple alarm circuit for a checkup with a 4001. It can be used to protect our home, motorcycle, car or any other application that comes to mind. In this circuit will be a computer simulation with Livewire and then design the printed circuit Kicad.

SW1 is a normally closed switch when pressed triggers the flip-flop formed by the two NOR gates of the CD4001 and remains there for a time determined by the time constant of R5-C2. This time it is keeping the relay RL1 and operated by its two contacts that investors control of two loads, for example, a siren and a light or any other that we connect to P3 and P4.
After that time, the relay circuit is switched off suddenly the alarm is activated again.

We can replace the switch SW1 PIR motion sensor, an infrared barrier, a smoke detector, gas detector, a magnetic sensor, a panic button or other device to act as a closed switch and opened fire alarm.


For the circuit can only practical substitute for a preset R5 (RV1) to adjust the monitor while it loads