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.
Frequency in this oscillator is controlled by a crystal. Any 1 MHz to 15 MHz can be used. The JFET can...
This circuit was obtained in an American publication of the time. Transistors are commonly used. The...
This Philips circuit of the 70's makes use of components of the time. The DZD40 is an uncommon...