Found in 1969 RCA documentation, this dimmer uses a dual time constant setting to achieve better control of the triac's trigger point.
The integrated circuits in this application are not very common today. One consists of an A / D...
This CMOS oscillator circuit generates signals up to a few megahertz, depending on the capacitor value....
This circuit was found in a 1977 American manual. The integrated circuit is from the time....