We found this circuit in an old General Electric documentation. In fact, PUTs are not common components today. The circuit is valid as a reference.
In the figure we have the application of a general purpose diode in the gain control of a...
The frequency of the blinking of this circuit is given by the capacitor that can have its value...
This circuit uses a GE optical coupler. Equivalents can be tried. The circuit is from the GE...