This circuit was found in a 1965 Electronic Design. Transistor Q2 must be load dependent. The circuit can be adjusted for currents from 1 to 10 A. The voltage drop is 3 V and the maximum voltage is 35 V.
This circuit, found in a Popular Electronics from 1992, is based on an oscillator and a crystal...
This circuit is from the SGS manual of linear integrated circuits of 1982. The L78xx is equivalent to...
Mouser Electronics has in stock Amphenol FCI Booltrack ™ connectors for robust connectivity...