This integrated amplifier was used in televisions from the 70s, with good sensitivity characteristics. The circuit was powered with 9 V.
This circuit obtained in a 1989 documentation can be useful for photographers in determining...
The circuit shown is from an old European publication. In it we have the way to activate a relay...
Toshiba's TCH8H611FNG integrated circuit makes it possible to control stepper motors up to 0.8 A...