This circuit was found in a 1968 General Electric documentation. It has an input impedance of 2 M ohms and excites a load of 16 ohms. The integrated circuit of the time is the PA237.
This circuit was found in Japanese documentation from the 1960s. The coil must be 4 mH and the...
We have already explored this configuration in several articles on this site. This was found in an...
This car alarm was obtained in a Signetics documentation from the 1980s. The circuit uses the 555...