This circuit was found in an Electronics World of 1968. It can be applied to any modern triac and the diac can be any type. The load depends on the triac.
This National Semiconductor circuit appears elsewhere on this site. The circuit must be powered by...
In this circuit the frequency is determined by the coil and the variable capacitor. Transistors like the...
This circuit is from old American documentation, but the transistor used is still very common...