This old fashioned transistor amplifier was found in a publication of the year 1958. Transformer are the critical components in the circuit and power comes from 6 D cells.
This circuit is from the SGS manual of linear integrated circuits of 1982. The circuit is based on the...
Found in a Popular Electronics from the 90s, this circuit is suitable for communication between rider...
Indicated as a joke or challenge this circuit shows how it is possible to control two lamps using...