This circuit is from a factory manual from the 80s. The circuit can be implemented with modern operationals. The supply must be symmetrical, and the diode is general-purpose.
We found this circuit in Radio Electronics magazine from August 1984. The circuit aims to control the...
The purpose of this circuit is to 'produce a beam of infrared rays modulated at a frequency that...
In the figure we have the typical configuration of a sinusoidal audio oscillator with twin-T. The...