This sequential relay actuation system circuit for traffic lights was found in Electronics Now from the 1990s. Relays are sensitive types of low current coil.
The integrated circuit can be replaced by more modern operational amplifiers like the 741. The...
We found this circuit in the August 1970 issue of Radio Elecronics magazine. It uses the CA3018...
The configuration shown in the figure is quite simple and can be used to activate a signaling LED...