alpg88
Flashlight Enthusiast
- Joined
- Apr 19, 2005
- Messages
- 5,411
lol, really??
current, on both sides of circuit, is equal with resistors, and linear regulators, the only time when it is different is when switching regulator is present, don't believe me??? do simple measurements.
well you might be somewhat correct, about actual current, but not in a way you described, the tailcapswitch isn't that well made, thin spring, cheap button... resistance of it might actually be higher than of the dmm i used, so actual current might be a bit less than measured. but not by much.
also. the calc. you linked doesn't take into account voltage sag of the cells, i can tell you if you use resistor and 2 rcr2 cells, you Will dissipate a bit more power on resistor than on led itself. even according to the link, power dissipation resistor will be almost 3 !!! watts. like buying foot long sandwich and throwing away more than half right away. not to mention there isn't enough room for 3w resistor.
another thing, heat transfer, since i took the light apart, i would not put more than 500ma on it, heat moves away from the star via thin edge of the body, half of the edge actually, may be enough for 500ma, but wont be enough for 1a, you'll fry the led, i have fried many leds\parts in decade or more i work with lights, by now i can see how such simple set up will work.
c,mon man you giving advice on thing you never seen, and bad one too.
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