This 4-voltage power supply using zener diodes has a maximum recommended current of 25 mA. The circuit was found in the May 1966 Radio Electronics magazine.
This circuit from a 1995 documentation triggers a set of lamps when the power goes out. In a more...
With a coil formed by 7 turns of 26 AWG wire this circuit operates in the 27 MHz range. But you...
The assembly of a good multimeter meets only one obstacle: the precision that is obtained depends on...