Natwerk Designs

Digital Electronics: How can I draw a truth table for the traffic lights?

i would like to draw a a set of traffic lights. The lights are designed to control access from a secondary road to a major road, so the time the lights spend at red (R) is longer than the time spent at green (G). The actual timings are to be as follows: Y = 1:5s R = 1:20s R and Y = 1:5s G = 1:10setc how can I draw a truth table for the problem?

Public Comments

1. You don't want a truth table, what you want is a finite state machine. Pick up Digital Design: principles and practices by john wakerly. Skip the stuff about transistors, read everything else as if your life depended on it.