Found in a General Electric documentation from 1970, this circuit is intended to supply a power LED of the time or Solid State Lamp. No information was given about the core used in the transformer.
Found in a European magazine from the 1980s, this circuit can amplify signals from 10 kHz up to...
This circuit indicates whether a cable or wire is energized by simply approaching its antenna. The...
Suggested by Intersil in documentation from the 90's, this circuit is valid for modern operating...