Forum Diagram

Car Burglar Alarm Circuit

This is a burglar alarm for cars.If some one opened the car door.The alarm will activate.Normally this schema provides 5 second to open the door and close it but If somebody opened it more than that the alarm will activate.To turn the schema on S1 should be closed.If you want to open the door more than 5 seconds.You can deactivate the alarm by using S2.Exit delay time can be adjusted by using R1 and C1.




Note

# This schema operates with 9v power supply
# Be careful when you work with high amp batteries