‘Tis the season for holiday hacks, and [Ben Emmett] is here to remind us that we don’t necessarily need a fancy microcontroller in order to make flashy fun things happen. Smoothing down the copper ...

This circuit shows how a 4017 CMOS decade counter can be used to build a timer circuit. Push-button S1 will discharge capacitor C1 through resistor R2. This circuit shows how a 4017 CMOS decade ...

This circuit enables any infrared (IR) remote control to control the outputs of a 4017 decade counter. It’s quite simple really and uses a 3-terminal IR receiver (IRD1) to pick up infrared signals ...

See schematic: <BR>View image: http://img8.imageshack.us/img8/5187/schematico.th.png <BR><BR>The 4017 decade counter in the lower-right heats up to blisteringly hot ...

[Andrea De Napoli] created a LED display consisting of a half-dozen LEDs connected to the inverted signals of a CD4017 decade counter, giving the effect that a dark LED is running back and forth. The ...