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 circuit appears on this site from different sources. This is from documentation from the...
The circuit shown in the figure consists of a low voltage drop (LDO) regulator for 200 mA using the...
The operating principle of the VCO shown in the figure is the same as the CIR4598 circuit. The...