Re: Wiring LEDs together

Thanks again for all of your replies!

That makes a lot of sense. I did indeed mean that each of the LEDs
require 3.4 mA, not mAh. I think you're also right about the 9V not
being able to provide enough "peak current" (look at how much I'm
learning!).

After some more research I came up with this: What if I use a total of
(16) AAA batteries in each hat? This would provide around 24V and I
could wire 56 LEDs in series of 7 LEDs with a 6.8 ohm resistor with
each series. This *should* use 240 mA. Assuming the AAAs give 1250 mAh
(from Energizer's site), they should last 5 hours. This is all under
the assumption that they will be able to provide at least 240 mA of
peak current.

So, does that sound like a smart way of going about this project? I
can get all of the batteries and holders for them for under $80, so
the price isn't terrible. Also, how do I know what peak current a
battery can supply? Can i be sure that the AAAs will provide at least
240 mA?

If I'm still being an ignorant idiot, just say so. I just have to get
this done quick, right, and at a reasonable price - and all those LEDs
have to light up real bright.

Thanks so much for your help!

.

Relevant Pages

  • Re: Wiring LEDs together
    ... I did indeed mean that each of the LEDs ... Assuming the AAAs give 1250 mAh ... and cell voltage drops rapidly. ... If I'm still being an ignorant idiot, ...
    (sci.electronics.design)
  • Re: Circuit Design Q. - battery charger
    ... #2 - The Booster Circuit - I intend to directly use the circuit illustrated ... batteries fairly quickly, BUT I don't want to "fry" the batteries - hence, ... OR six LEDs depending upon the size/design of eachlamp I'll be making) as ...
    (sci.electronics.design)
  • Re: Crank flashlights: Which batteries are in there?
    ... IMO,Duracell batteries are prone to leaking. ... Get a flashlight that uses lithium cells. ... Costco and other discounters carry. ... I am not a fan of LEDs, they just aren't as bright as regular ...
    (sci.electronics.design)
  • Re: Crank flashlights: Which batteries are in there?
    ... IMO,Duracell batteries are prone to leaking. ... It's hard to find brands other than Duracell out here since that is what Costco and other discounters carry. ... I am not a fan of LEDs, they just aren't as bright as regular ... The 1W and 3W Luxeon LED lights are pretty good. ...
    (sci.electronics.design)
  • Re: so I got a Cateye EL300.. & general comment on LED headlight runtime claim(long)
    ... featuring five LEDs powered by 4 AAs. ... provide useful amount of light with much lower power. ... nearly maximum output for a good part of batteries' life, ... is driven through a 10 ohm series resistor, ...
    (rec.bicycles.tech)