This toy transistorized organ was found in the May 1970 issue of Radio Electronics magazine. The trimpots are adjusted to the musical notes according to the key.
This circuit, suggested by Texas Instruments, is based on the integrated TL497A, designed for...
In the figure we have the way to implement a sinusoidal oscillator with the 4093 IC. The component...
This circuit was found in an old American documentation. It can operate with signals from 40 Hz to...