This circuit was found in a 1965 Electronic Design. What it does is respond only to positive pulses (above zero volts) and can be used in automation systems.
This circuit was obtained in a Popular Electronics of the 90s. It against a kitchen hood based on...
Found in the August 1993 Electronics Now magazine, this circuit employs two symmetrical source 741...
The 50 kHz signal generated by this circuit is applied to a low impedance inductive transducer. A...