/diy/ - Do It Yourself

>>1492331
>normal monostable multivibrator
I'm planning to use a 555 + ½ of CD4027 connected as Toggle flip-flop to produce the clock signal. Is this what you meant?
>is it normal for your traffic lights to go orange/yellow before they go green again?
Yes, this is the ordinary light sequence in my country. It just shows the difference between red->green and green->red transitions.

>>1492333
>>1492512
Your circuit would be great for controlling multiple lights but however I only need one light for cars + one for pedestrians. Also I don't have any cd4060 at hand, but have a huge stash of CD4017 & not afraid to use them!

>>1492407
Variable speed clock sounds like an interesting idea. I thought about dividing the main clock signal down with some cd4027 flip-flops connected as T-flip-flops (or yet another 4017?). Then a logic circuit would select an appropriate clock frequency for the cd4017s controlling the lamps.

Here's the current iteration of my nearly-all-4017-controller. It uses two extra 4017s in both lamp counters to inhibit the clock signal, keeping the counter in "green" state for a longer time. I also tried to re-organize the clock distribution to keep positive-going transitions from occurring at cd4027 J, K and clock inputs at the same time.