This circuit was found in the 1992 Radio Electronics Handbook. It is used to test VCR recording heads. It can also be used for other purposes.
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....