A vacuum of 25 inches of mercury is insufficient. At sea level, air pressure is about 29.5 inches of mercury. What I have read in books and on the casting list
I saw a typo. Bert said "Accidentally connecting the LED in reverse across a low voltage source should cause any problem - it simply won't light." ^^^^^ I am
... I don't think that's what they're doing here, though. ... I think that's more likely. I just now popped the top off of it and the assembly that holds the
... Hi Roy, The voltages I quoted were worst case forward voltage (Vf) for design purposes. White LED's actually have a range of forward voltages from about
... If white requires 3.6V, then I wonder what's in the "LED upgrade" I got for my 2-AA maglite, since that supplies only 3V (or less). It has 3 white LEDs
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