Some stuff I failed to mention in the vid:
* when in normal traffic light mode pressing the button again will loop the mode back to flashing amber
* the green/red on-time can be changed in any mode (flashing red, alternating red-amber, etc.)
* green/red on-time is stored in EEPROM so the circuit remembers even when powered down
For a full discussion of the circuit and schematics as well as various images of the build visit: https://electromotiveforces.blogspot.com/2012/02/toy-traffic-light-next-gen-is-here.html
Post time: Feb-09-2017