This xenon flasher version for the power grid is from an 80's EDN. The circuit uses a folder and a pulse transformer to trigger the lamp. C1 determines the intensity of the pulses.
This is the traditional configuration of an unregulated bridge rectified power source. The circuit...
The current accross the LED as function of the resistor value is given by the formulas. The...
This circuit for receiving or transmitting low power was found in old American documentation. It is...