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Thread: Son of simple step-up SMPS challenge
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face BY : Russell McMahon email (remove spam text)



White (or other) LED flashlights - 1 - 2 & 2  - 4 cell designs.


http://mikro.e-technik.uni-ulm.de/persons/lares/LED_flashlight.html#V1

Nicely done albeit a little commercial in rendition :-)

University of Ulm.
Two different IC's used.
65% to almost 80% efficiency depending on battery / LED combinations.

.

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Subject (change) Son of simple step-up SMPS challenge

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