Opto control for triac (CB20552E)

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

Shunt motor control (CB7940E)
This control for 1/15 HP motors with 5,000 rpm for 115 V power grid was suggested by a Motorola...
15 A Protected Regulator LM123 (CB14511E)
The circuit below is found in the manuals of several manufacturers in the LM123 series of...
Microphone Amplifier (CB20008E)
This configuration found in a Motorola documentation consists of an experimental circuit that uses...