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.
High selectivity filters can be obtained by combining same frequency crystals in series as shown...
We show an oscillator that produces rectangular TTL signals based on inverters. Inverters can also be...
This circuit is from an old National Semiconductor component manual. The circuit can be...