This Design Idea offers a practical approach to cascading two or more Johnson counters together with a bare minimum of parts. The CD4017 Johnson decade counter finds use in simple circuits ranging ...

‘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 ...

The 74HC4017 and 74HCT4017 are 5-stage Johnson decade counters capable of delivering 10 decoded outputs (Q0 to Q9), provides an output from the most significant flip-flop (Q5-9), features two clock ...

[Jeff Joray] wrote in to show off this perpetual Pong device he built. The six by ten LED matrix acts as a game board for Pong but there are no controls. The board simply plays against itself. It’s ...