In: Electrical Engineering
design 4 bit four way traffic light signal by using j k flip flop and 555 timer ic state equation and k map and also schematic diagram.
555 Timer is used to generate the clock signals for the flip-flops.
Traffic light control is shown below.
Thus, state diagram for the counter will be as follows:
Excitation Table of Counter
Expression for the Excitations can be derived using K-Map
Circuit
Circuit Diagram
555 Timer is acts as astable multivibrator with 50% duty cycle. To make duty cycle 50%, two diode D1 and D2 are used..