This oscillator that generates signals below the audible range (sub audio or infrasound) was found in a 1965 documentation. Transistors are for general use.
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...