This car alternator voltage regulator was found in a former General Electric publication. It maintains the voltage at 14.5 V. The alternator diodes are power types.
This commercial circuit is from a Japanese magazine from 1967. It uses germanium transistors, and...
This circuit can be used to drive relays, solenoids, motors and other loads according the...
This circuit is based on the small keychain that responded to the sound of a whistle and were...