I am looking for help designing a control system using relays and timers to control 2 sets of traffic lights that sequence based on time. Any ideas?
Yes I have, but no luck. They mostly use PLCs or some type of circuit board. I am trying to teach students about relays and timers.Probably been done Many times before.
Have you done a Google search?
Max.
Thank you but I am trying to do this with relays and timers only. I may need to add a stepper of some type, but have not found one yet. Your idea will be great for our next project.Something like this -
Regards, Dana.
I might be able to help..I am looking for help designing a control system using relays and timers to control 2 sets of traffic lights that sequence based on time. Any ideas?
Hello - thanks for your replyI might be able to help..
What are your design requirements?
Suppy voltage?
Relays only?
4 way?
No of aspects?
Etc...
eT
Thank you for the notes.I totally agree with @crutschow. If you really want ton use 120 VAC traffic lights use 3-32 V SSR relays.
You can substitute LEDs while breadboarding and then finally connect to the 3-32 V control system. All of the 120 V stuff is safely tucked away.
While 24 VDC sounds good, you might have better luck using a lower voltage.
The traffic light sounds more like an Asyncronous machine with timers, but I don;t know.
Assume one light is the master: You have the red delay and then the amber/green delay. When red times out, you have the amber green delay system.
On the falling edge of the master RED, you do a yellow/green cycle on the slave.
On the Rising edge of the master yellow, the slave is RED
That's my quick an dirty timing without the delays. I know stuff is missing.
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