We found this circuit in a 1965 General Electric manual. The controlled load depends on the Triac and the 100 uF capacitor delay time.
This traditional triac power control circuit can control loads up to 1000 W. The triac must be...
Described in an article that taught how to assemble the complete intercom in Radio Electronics magazine...
The figure shows a simple test circuit for optical isolators with photodiodes. The circuit was...