This circuit was found in a 1980s documentation. Similar configurations appear in the section, but from different sources. The circuit makes use of components of the time.
Found in a 90s EDN, this circuit makes use of period components. The maximum current depends on the...
This circuit uses two light-activated SCRs or LASCRs, uncommon components today. The power depends on...
This circuit was obtained in a magazine for radio amateurs 73 of the 90s. The circuit is based on...