Car Burglar Alarm system with radio wave signal

When steal open automobile door relay K1 and K2 work make have voltage 12V give radio transmitter and origin sound part for mix radio waves steal will deaf anything sound. Because radio high frequency. But car owner will hear the sound , by take handbag very small radio, tune the frequency directly with the frequency of a transmitter. Which there is just not mW as a result the enough. A transmitter will still work for 15S (fix the time has with R3 and C1) although the door will open then follow thereafter radio transmitter will stop to work. Because of Transistor stop bias relay contract K2 be scratched. The transistor that use must durable current change relay get. If use battery separate separately and use an antenna model to draw start up the motor this use within a car , steal will can not cut the work has of from the outside.

Burglar Alarm Circuit by 2N2222
At this period the economy not good, Make have steal plentiful. We come to try build the circuit steal model to is simple better. The Alarm Sound (Super Bell) loud forever until will cut po ...
Easy kick out steal
Although the prevent steal or Circuit this be model to be easy the system is simple. but I thinks it may help can protect your assets. The principle is simple be the system Close Wire Lo ...
Home burglar alarm with timer delay using one IC 556
This circuit uses IC 556 which have timer 2 the group in one. First group is moto stable and second group does in front is in a state of a signal goes out work to is unfinished although ...
Car alarm systems circuit
The car is a vehicle that is important, very useful. It must be good protection. If I lost it a lot. I recommend identity theft protection for cars, there are several circuits to see it. Car Al ...
Home and Vehicle 2-Zone Alarm Pager System
Have you ever wanted to receive an instant notification when your home or car is being vandalized or broken into? The Enforcer Home and Vehicle 2-Zone Alarm Pager System integrates with most h ...