This circuit is from a 90s documentation. It has a hysteresis and uses a light sensing bridge. The circuit generates a 1000 Hz modulated 10 Hz signal. The signal must be applied to an amplifier.
This vox was found in Hughes documentation from 1968. The circuit uses components from the era. A...
This simple CMOS circuit generates two-frequency signals for use as a signal injector. The circuit...
The LM387 integrated circuit used in this project is not very easy to obtain. The circuit, from an...