I have called this circuit the 'Oscilifier' as it is an oscillating circuit that seems to magnify the output of light from a light emitting diode. It uses a bifilar wound air coil in a very simple transistor circuit resembling a joule thief.
It is in fact a pulse motor circuit that can enter into self oscillation mode by shorting the collector and the base of the transistor for a second. If a diametrically magnetized cylindrical magnet is spun up in front of the coil it will set the circuit oscillating and the magnets spin will begin to accelerate as the coil attracts and repels the magnet when the transistor is switched on and off. There is a transient spike that results from the collapse of the field within the coil which is captured and converted into light.
In the video below i run the circuit from 1V-9V and show the output of light which is quite extreme considering the light bulb i am using is designed for use as a ceiling spotlight. Above 6V the circuit will automatically enter into self oscillation and below 3V it requires shorting between the collector and base of the transistor.
While the circuit remains the same for the different voltages the components change. I have created a PDF schematic of the circuit which you can download at the top of the page. The diode is not essential until you get into the higher voltages and inplace of the resistor in the schematic i used a 10K potentiometer which allows me to tune the circuit to find the optimal resonance of the coil.
At the end of the video (below) i show a curious effect where an avramenko plug is connect to nothing else but a ground stake outside my house no deeper than one foot. When i touch the AV plug i get light from the LED! I have turned off the wireless internet, the TV and all other electrical devices in the room to eliminate them as a factor. I am thinking i am picking up a frequency from the house mains and am yet to switch this off to see if that is the cause. If anyone reading this knows what causes it i would love to hear fromm you.