This circuit was obtained in old documentation, but it is valid for modern triacs that must be equipped with heat sink. The trigger element is an ordinary neon lamp.
This rev counter, which can be used in a car or engine, was found in a French magazine Radio Plans...
Using a window comparator, this circuit trips over a certain range of input voltages. Formulas for...
This circuit generates a signal rich in harmonics that extends up to close to 1 GHz, serving for...