Found in American documentation, this circuit uses an automotive ignition coil to generate 20 kV. The transistors used support equivalents.
The circuit shown in the figure is basically designed to excite a lamp, but other types of loads...
This circuit came out in a Frances Toute LÉlectronique magazine from July 1978, but can still be...
This metal detector was found in a 2001 Poptronics, but it can still be easily assembled, as the...