Simple Key code lock switch circuit using IC-4017 digital, uses 10 switch bottom to control output by Relay. No microcontroller so easier and cheaper!
Here are LED light sequencer circuit that using IC-4017 and IC-555.
This is a circuit that features a running pace with a changing voice, the tiny microphone. For a frivolous fun.
This is a review of electronic sound or a violent coin toss. With electronic circuits. Coin toss electronics using NE555-CD4017 This circuit uses integrated digital IC NE555 and CD4017 with…