This type of configuration can be seen elsewhere in this section. This is from a 1965 General Electric Hobby Manual. The circuit applies to most modern triacs.
This small earphone amplifier with germanium transistors was obtained in a Japanese publication from...
The sensor for this circuit is a phototransistor. We found it in the April 1971 issue of Radio...
Found in a 90s Popular Electronics, this circuit allows to select the operating ranges between...