lie detector

This circuit performs two functions: when the supply voltage to the motor of the model car cuts out, the car will not stop abruptly but will continue over some distance and during that time two LED`s will light up and function as brake lights. Thus a very realistic effect is obtained. he circuit is extremely simple. As long as the car is under power, there is a voltage across the motor (M), the polarity of which is indicated in the diagram. Capacitor C 1 and (via diode D) also C 2 are now charged.