Figure 1: Robots emulating AND, OR, XOR gates and a half adder in a living animal. We then added N robots (EP1P2N architecture), N being activated if and only if both X and Y are present.

[IMSAI Guy] grabbed an obsolete XOR gate and tried a classic circuit to turn it into a frequency doubler. Of course, being an old part, it won’t work at very high frequencies, but the circuit is ...

Why? I will explain, but first let me say to those who have been playing with this puzzle: (a) You can not use XOR gates and (b) there really is a solution. In fact, as “The Black Adder” would say ...

Wow the engineering world with your unique design: Design Ideas Submission Guide If the standard AND or OR logic elements are easily replaced by diode-resistive circuits, then the situation is much ...

Logic Noise is an exploration of building raw synthesizers with CMOS logic chips. This session, we’ll tackle things like bells, gongs, cymbals and yes, cowbells that have a high degree of non ...