This automatic shutdown circuit was found in a William Sheets from the 1990s. The circuit automatically shuts down a car's electrical system.
This simple optical alarm circuit was found in the 1991 Electronics Experimenter Handbook. The...
This broadband amplifier was found in an Elektor from the 90's. The gain is 10 dB with a noise...
A recreational application of the 4018 is shown in the figure in which we have electronic dice....