Car tracking device circuit

This car tracking device circuit can be used to locate car in a parking or other objects and is made up of two parts : a receiver and a transmitter.
The first part of this car tracking device circuit is an RF oscillator based on 555 timer and the second part is a sensitive receiver .
Tank circuit C2 and L1 is used to tune the transmitter. The antenna is coupled to the transmitter through C3 and must be a telescopic antenna or a length of hookup wire . At the receiver, the incoming signal is tuned by C4 and L2 before being passed on to the 741 IC.
To find the object using this car tracking device is use a visual indications with 5 LEDs which indicate the signal strength. After build , the car tracking device ( receiver and transmitter ) will need to be tuned. We need to tune the transmitter until all of the receiver's LEDs light and adjust Rv2 until you get a maximum strength reading only when the receiver's antenna is pointed directly at the transmitter.