We found this circuit in a Radio Electronics Experimenter from 1990. The circuit uses a common incandescent bulb and a car ignition coil.
This circuit is from the SGS manual of linear integrated circuits of 1982. The L78xx is equivalent to...
This circuit was obtained from a Linear Technology manual from the 1990s. The sensor is of the...
The transistors in this circuit from an English publication in 1980 may be the BC548. Operational...