EEVblog Electronics Community Forum
Electronics => Projects, Designs, and Technical Stuff => Topic started by: T3sl4co1l on December 06, 2017, 12:15:28 am
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(https://www.seventransistorlabs.com/Images/FlashlightTrio.jpg)
This is the design I've shown and discussed elsewhere (https://www.eevblog.com/forum/projects/building-a-simple-switching-circuit/msg1252706/#msg1252706), now realized in non copper-clad-prototype form as well. :)
Powerful enough to suck down an 18650. Not sure if these cells are in need of a charge, or just old and weak, but I'm only getting 50% of rated power out of these. Nothing wrong with that, of course -- the undervoltage limiter circuit prevents brown-out failure. That's why I know I'm getting only 50%. :)
Very hackable design. Lots of test points. Two resistors change it to a portable, adjustable bench supply!
Tim
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At that implied power level I bet it makes a nice hand warmer too :)
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Th old 1W flashlight I made, you can feel it, particularly in a sensitive area like point blank on your lips.
You can feel these in your hand, unmistakably. ;D
Tim