Found in a Popular Electronics from the 90s, this circuit can be used as an electrifier. T1 can be an old TV fly back transformer or an ignition coil.
This circuit, which operates with frequency up to a few tens of megahertz, is from a 1976...
This circuit of very high input resistance was found in a Radio Shack documentation from 1977. The...
The configuration shown in the figure makes use of two comparators of the four available on the...