This circuit was obtained from a 1977 FET manual. The circuit measures inductances using a signal generator as a reference. The range is from 60 uH to 60 000 H. The FET can be a BF245.
This circuit, obtained from a 1965 magazine, can still be assembled using some modern equivalent...
This linear speed control for DC motors up to about 2 A was found in a 1978 publication. The power...
This circuit is from 2001 documentation, serving to multiplex stereo signals for FM transmitters. The...