Found in a 1966 General Electric documentation, this dimmer should only be used with incandescent lamps. The Triac is according to the power of the lamp.
This circuit was found in an old Poptronics but is still current as transistors can be replaced...
This 1968 Hughes circuit uses period components and operates at 8 Hz. Current equivalent...
This 100 kHz oscillator was found in a 1966 Motorola publication. The transistors are of types...