This circuit was found in a 1977 documentation. It limits the voltage from a source using zener diodes on the rectifier bridge. It is an unusual configuration today.
May 2017 - Mouser Electronics already has in stock with the new ADP244x switched regulators from...
This simple circuit was found in Popular Electronics. It can be built with any JFET. Galvanometers from...
This 27mW transmitter was found in documentation from the 60's. The transistor is germanium of the...