Opto control for triac (CB20552E)

Found a documentation for PC from 1992, this circuit is indicated for the English power grid of 240 V.

15 V x 100 mA Voltage Regulator (CB1510E )
We found this circuit in an integrated circuit cookbook from 1974. The circuit can provide larger...
High Power 3 Voltage Source (CB20210E)
This powerful source was obtained in an American documentation of the 80s. Some components are...
Phase Shift Oscillator (CB11480E)
This circuit was obtained in an old publication from 1979. It describes a simple low frequency...