Found in a manufacturer documentation from the 90s, this circuit makes use of period components. The configuration can be adapted to use modern equivalent components.
This charger can be used with one to four AA, AAA, C or D cells. The maximum current is given by R...
This wired intercom was found in a 1960 Sylvania transistor manual. The transformers are the type...
In the figure we have the way to control a triac of the TIC series with a low voltage through a...