pls I have being trying to design a simple traffic light circuit the problem is that the lecturer insisted that a transistor must be in the circuit pos can anyone help

Its better you google the stuff because nobody will be willing to help you here.

How is this programming

iotstudent:
pls I have being trying to design a simple traffic light circuit the problem is that the lecturer insisted that a transistor must be in the circuit pos can anyone help

are you using a microcontroller? if yes, just represent the state of each led with a transistor and connect the led to the transistor's nodes.
i hope u get the gist

BTW, i'm not an elect major, just basic electronics back in school.

Get an arduino and ur problem is 20% solved