This circuit with a 4046 PLL was found in the December 1989 issue of Radio Electronics magazine. The circuit produces the clicks of a roulette wheel at decreasing speed.
Here we show how two 4017s can be cascaded to count above 10. The circuits are driven by a square...
The circuit in the figure represents a typical application of a phototransistor exciting a relay...
This circuit, in fact, what it does is a reactivation of the batteries through a brief pulsating...