This circuit is from an ancient American documentation. The integrated circuit is 741 and the power supply must be symmetrical. The passing band is centered at 1 kHz.
These simple weapon and target circuits with emitter and photoelectric sensor were found in a 1985...
We found this circuit in an old publication dealing with operational amplifiers. The circuit uses...
Suggested by General Electric in a 1967 documentation, this circuit replaces the Thryraton tubes used at...