Well, I thought I'd amuse myself a bit, so here's a new view on the variable potentiometer: . Good for mildly amusing soirees.
Vlad ______________________ -- holding, among others: a universal analog/digital filter, block-level models for power electronics (and not only), math blocks with a more stream-lined approach, some digital ADC, DAC, (synchronous-)counter, JKflop, etc.