This double time constant circuit for resistive loads was found in documentation from the 1980s. The triac must be equipped with a heat sink.
This circuit is from a 1977 Radio Shack documentation. In it we have the activation of an LED for...
This circuit uses an 18 MHz crystal to generate 36 MHz signals. We found it in an 80's...
This circuit from General Electric was found in a 1967 documentation. The SCR is of the time, as...