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.
In the figure we have a simple signal tracer circuit to be coupled to the volume control of an AM...
This circuit was found in documentation from the 90s, using components from that time. The...
This circuit, obtained from old documentation, allows the recovery of sulfated batteries. The...