This circuit with a few watts of power was found in the April 1995 issue of Electronics Now magazine. The voltage obtained and the efficiency depend greatly on the transformer.
We found this circuit on an Elektor from the 90s. The frequency is given by capacitor C1. The...
This linear LED scale circuit was found in the February 1992 issue of Radio Electronics magazine. Note...
This circuit is from the owner's manual of the integrated circuits used. The manual is old, which...