Circuit Project Electronic www.eleccircuit.com

Circuit Project Electronic www.eleccircuit.com

Car Burglar system with start delay

Posted: 29 Jan 2013 11:34 PM PST

This circuit can prevent a car theft. By the delaying them, not to steal our cars easily. Which can use in both cars and motorcycles, that uses a battery 12 volts and also cheaper too. The working principle. In Figure 1 is the Car burglar system with start delay. When we apply a voltage supply on first time, the capacitor C2-22uF will delay time the circuit not work immediately. Then C2 is discharged with a resistors R2-50K. Figure 1 The complete circuit of Car Burglar system with start delay Once through this period. The circuit will checking a undulation of voltage. By have a potentiometer VR1-100K is adjusted a sensitivity. When the car starts to cause ripple voltage. The undulate will be the C1 coupling a signal go to pin 13 of IC1/1, by passed way the VR1 and R4 IC1/1(LM324) is used to amplify the voltage out away pin [...]

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