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.
Found on Popular Electronics from 1970, this circuit fires a xenon lamp producing a C1-dependent...
Found in documentation from the 1980s, this highly sensitive circuit is based on the conduction by the...
This simple circuit helps to save incandescent lamps by leaving their filament slightly heated and thus...