Now, the thing to remember is that we are using a CD4512 chip, whose truth table is shown below. The important thing to note here is that, in addition to the three multiplexer select controls, A, B, ...

There are pocket-sized electronics, and then there’s the EclairM0. It’s a 50 x 40 x 8mm (2″ x 1.6″ x 0.3″) device that weighs just 15 grams (0.5 ounces). But it’s a multifunction gadget with a small ...