Sample plans for a battery-operated LED?

Hi,

I was wondering if anybody could point me to a website, etc. that could
tell me how to design a simple battery operated light. I'd only
planned on using 1 LED and a small battery. Seems like a simple first
project (as you can tell from the vagueness of my question, i am a
newbie) and I would have a practical use for it once it is done. Any
help would be appreciated.

Thanks for any help.

 

[Anders F]

<mflatley@gmail.com> wrote in message
news:1102532068.537347.106220@c13g2000cwb.googlegroups.com...

Hi,

I was wondering if anybody could point me to a website, etc. that could
tell me how to design a simple battery operated light. I'd only
planned on using 1 LED and a small battery.

3V lithium + a resistor....?
Then you'll apply ohms law. If you don't know that one - thats a good place
to start.

(Or maybe a Zetec switcher? Guess not...)

Seems like a simple first
project (as you can tell from the vagueness of my question, i am a
newbie) and I would have a practical use for it once it is done. Any
help would be appreciated.

Google is your friend!
Say:
http://wolfstone.halloweenhost.com/TechBase/litlpo_PoweringLEDs.html#BasicCalculation

/A

Thanks for any help.

 

[John Fields]

On 8 Dec 2004 10:54:28 -0800, mflatley@gmail.com wrote:

Hi,

I was wondering if anybody could point me to a website, etc. that could
tell me how to design a simple battery operated light. I'd only
planned on using 1 LED and a small battery. Seems like a simple first
project (as you can tell from the vagueness of my question, i am a
newbie) and I would have a practical use for it once it is done. Any
help would be appreciated.

---
You might want to try sci.electronics.basics for some kinder, gentler
replies.

--
John Fields

 

Thank you both for the info. That page seems like a good start to me.


Thanks for pointing out the other group too. This was the first group
that came up when I googled.

 

[Anders F]

"John Fields" <jfields@austininstruments.com> wrote in message
newsmker0tpii0s2gujtpi140b9ncucqgb39c@4ax.com...

On 8 Dec 2004 10:54:28 -0800, mflatley@gmail.com wrote:

Hi,

I was wondering if anybody could point me to a website, etc. that could
tell me how to design a simple battery operated light. I'd only
planned on using 1 LED and a small battery. Seems like a simple first
project (as you can tell from the vagueness of my question, i am a
newbie) and I would have a practical use for it once it is done. Any
help would be appreciated.

---
You might want to try sci.electronics.basics for some kinder, gentler
replies.

Great stuff - we should have such a thing in the .dk hierachy too =)

/Anders

 

[Anders F]

"Jonathan Kirwan" <jkirwan@easystreet.com> wrote in message

Doesn't get close to warm. I just measured things at the emitter and I
see a
about a 60kHz waveform, switching between about 3.0V and 3.6V:

Great stuff! Been searching for one of those (highpower LED on AA/switcher)
for a long time!

Thee's a Costco near me,,so I'll go check it out.

Hmm - wonder if I'll get'em near me (in Denmark). Don't they have a name one
can search on the www?

Cheers,
Anders

 

[Jonathan Kirwan]

On Thu, 09 Dec 2004 18:19:49 -0500, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

OTOH, if you can live with those limitations, prices and value are
very good. Their profit is about equal to the membership income.

They pay their employees well (I've had discussions with several of them about
this, after reading a few articles say so) and the ownership is very liberal
minded, contributing to the right causes. They are growing well, against
the trend of some in their business area and they are doing it while maintaining
good employment policies (also in contrast to some.)

Jon