The JK flip-flop augments the behavior of the SR flip-flop (J = Set, K = Reset) by interpreting the J = K = 1 condition as a “flip” or toggle command. In my previous column, we introduced latches and ...

Now that we’ve introduced a JK flip-flop, let’s look at some circuits that we can create using it as the core element, including the T and D flip-flops. In my previous column, we started to look at ...

Flip Clock turns your iPhone into a retro-style timepiece. The $1 download mimics the old fashioned analog-digital clocks with flipping, plastic-card numbers (as seen waking up Marty McFly in the ...

A digital clock based on seven-segment displays? Not exciting. A digital clock with seven-segment displays that’s really big and can be read across a football field? That’s a little more interesting.