Re: Wiring LEDs together

Thanks for the reply.

Unfortunately, this is kind of a custom rig, and we do require the use
of LEDs that we purchased from a special retailer. They are super
bright 12000 mcd white LEDs that run at a typical voltage of 3.4 V and
no more than 30 mAh. We have 9 hats and each hat requires somewhere
between 35 and 65 of these LEDs.

I have another question. I did some research and found these lithium
9V batteries at Radios Shack, which advertise 2000 mAh. So I picked
one up, and hooked it up to the configuration that I described in my
original post (54 LEDs, 27 pairs w/ 82 ohm resistors on each pair).
Only about 10 of the LEDs were at their full intensity!

I was baffled by this, because I figured, if the LEDs were pulling 800
mA, the 9V battery should be able to supply it in full capacity,
right? It made sense that my normal alkaline batteries dimmed because
they pushed under 600 mA, but these lithium ones were pushing the full
load in theory. Am I totally misunderstood on the concept of
electricity? Can anyone explain this to me? It seems like I'm
providing the LEDs with more than enough power, but they're still
dimmed - I'm sure it just comes down to the fact that I don't know
what I'm doing - but I'm going to keep trying anyways - with your help
of course!

Thanks again for your help!

.

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