TRAFFIC LIGHTS
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As well as the 4017 chip you will need a Hex (6) INVERTER and a Quad (4) AND gate chip.
Don't forget that all three chips need power connected to the correct pins.
The six diodes are Light Emitting Diodes (LED's).
The 470k and 4.7 uF control the speed at which the lights change.

Copyright Graham Knott 1999