Monthly Archives: February 2010

Joule Thief

To light blue and white light-emitting diodes (LEDs) the voltage of 3V is required. By the way, white LED is the same as blue LED with additional luminophore inside. This luminophore is activated by blue light and lights up. Finally it lights as … Continue reading

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DVD laser lights up part 2

I adapted the collimator of the higher quality. The voltage 250 mA is enough to light a match. And there is no need to hold it long. The collimator was tore out from a copier. It’s quite good, that you can precisely … Continue reading

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