Found in a 1968 EEE, this switch controls a high-power load from an audio signal. The current is determined by the type of SCR.
This circuit was found in a 1965 Electronic Design. Transistor Q2 must be load dependent. The circuit...
I found this circuit in an old Argentine publication from 1973. The components are no longer...
This ionization chamber voltage tripler circuit from the January 1994 Electronics Now magazine uses...