This very detailed Dimmer was found in an English documentation from the 90's. The SCR could be a modern equivalent like the TIC106. The circuit is only suitable for incandescent lamps.
This conventional window comparator configuration was found in an old documentation. It is valid...
This sonic relay or vox was found in a Popular Electronics from the 90's. The power MOSFET can be of...
This high voltage circuit was found in a 1970 documentation. The integrated one is of the time and...