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.
This circuit appears in several versions in publications of the time and can be modified by...
This configuration with FET and Unijunction can be found elsewhere on this site. The JFET admits...
We found this circuit in a Popular Electronics from the 90s. It operates at a frequency of 15 kHz....