This circuit drives symmetrical loads through a single transistor. The circuit is from a Radio Electronics from January 1993. The power depends on the MOSFET used.
Found in an English documentation from 1977, this circuit activates a relay when the input voltage...
This Colpitts crystal oscillator was found in an American publication for amateurs in the 1980s....
This multivibrator, whose frequency depends on the capacitors, was found in an Argentine...