This circuit makes use of a special LM195 power transistor not very easy to obtain. The circuit is from the 1994 Linear Applications Handbook by National Semiconductor.
This small audio amplifier circuit in complementary symmetry was found in the 1974 Mullard...
This is an experimental crystal radio that uses no power source. The antenna must be very long (at...
This brightness control for incandescent lamps or engine speed has been found in a 1970 English...