This circuit was found in the August 1996 Electronics Now magazine. The circuit is based on an operational circuit whose type determines the gains and limits for the frequency.
This loop antenna was found in a 1990s documentation. The circuit includes a field strength meter. The...
If the reader has an old MSX still working, it can be used as a microcontroller for your robotics...
This transistorized stage of an old documentation aims to increase the sensitivity of a...