This filter was found in an 80's English publication. However, it can be implemented with modern operating systems. The circuit can tune frequencies in a range from 10,000 to 1.
Found in British documentation two years 70, this circuit generates two beats, being one of 800 Hz...
This circuit can be found in a 1970 Motorola documentation. The circuit can be implemented with general...
With this circuit it is possible to fire an SCR from the light that falls on a phototransistor. The circuit...