This oscillator was found in a 1976 documentation. The no specified components indicate circuit timings in the range of 150 ns to 120 seconds. The supply must be made with 5 V.
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...