Found in a 90s Radio Electronics, this circuit can supply currents of a few amps, according to the power transistor. The power transistor must be equipped with a heat sink.
Found in an EDN from the 80's, this circuit makes use of an operational one of the time. The...
This circuit was found in a 1962 publication. At the time there were high voltage batteries like the...
This circuit was found in a Motorola Manual of 1965. The circuit has neon lamps as trigger...