led driver made fromdiscreet components ?

M

mark krawczuk

Guest
hi, i want to make a led torch , something simple , that runs of 2 , maybe
4 , 1.5 volt battteries .
and to power 2 or 4 white leds.

is there a driver to make bit more efficent use of battery and leds ?
something that uses transistors etc , NOT ic`s.

thanks,
mark k
 
In article <_4ednXJFX6AdywDanZ2dnUVZ_rGhnZ2d@adnap.net.au>,
"mark krawczuk" <krawczuk@adam.com.au> wrote:

is there a driver to make bit more efficent use of battery and leds ?
something that uses transistors etc , NOT ic`s.
Click to expand...
http://www.emanator.demon.co.uk/bigclive/joule.htm

....among others.

--
Cats, coffee, chocolate...vices to live by
 
In article <LawrenceSMITH-4E5905.23175227012008@news.verizon.net>,
LawrenceSMITH@SOuthernVERmont.NyET says...
In article <_4ednXJFX6AdywDanZ2dnUVZ_rGhnZ2d@adnap.net.au>,
"mark krawczuk" <krawczuk@adam.com.au> wrote:

is there a driver to make bit more efficent use of battery and leds ?
something that uses transistors etc , NOT ic`s.

http://www.emanator.demon.co.uk/bigclive/joule.htm

...among others.


What a neat site. Check out the pics of the guy electrocuting himself.
Click to expand...
Just go up the the bigclive folder and scroll to the bottom of the page.

- Tim -
 
On Jan 28, 4:14 am, "mark krawczuk" <krawc...@adam.com.au> wrote:
hi,  i want to make a led torch , something simple , that runs of 2  , maybe
4      ,  1.5 volt battteries .
and  to power   2 or 4  white leds.

 is there a driver to make  bit more efficent use of battery and leds ?
something that uses transistors  etc , NOT  ic`s.

   thanks,
mark k
Click to expand...
Sounds like a simple constant current source.
Google it.
 
Marra <cresswellavenue@talktalk.net> wrote in news:411d2cb0-05ea-4b53-959c-
5c74ff01cccc@e6g2000prf.googlegroups.com:

Sounds like a simple constant current source.
Google it.
Click to expand...
He said efficient. And he already got a far better answer from 'Ecnerwal'.

http://www.emanator.demon.co.uk/bigclive/joule.htm

I wish I could get a decent answer to my question on phase controllers. Got
to vent spleen for a moment here... Is Usenet fading out? Seems to be a few
serious people who keep to their own stuff, they help each other out but
virtuually ignore the rest of us. The rest seems to be handbags-at-dawn going
on for days between people who enjoy being tetchy to each other, and a few
sporadic posts that either go unanswered, or get answered by trite remarks
from smartasses who can't be bothered to read what they're answering. It's
not often been this bad in the last year or two, and I hope it gets better.

If I find an answer to my own question on phase controllers without blowing
up a decent drill trying it, I doubt I'll bother to post the answer as no-one
seems to care enough to help me. Obviously, I won't help in turn by supplying
info, especially as it's blindingly obvious that no-one here or in s.e.d.
cares anyway.
/rant. But it had to happen, as asking nicely for several days wasn't cutting
it, was it?
 
Lostgallifreyan wrote:
Marra <cresswellavenue@talktalk.net> wrote in news:411d2cb0-05ea-4b53-959c-
5c74ff01cccc@e6g2000prf.googlegroups.com:


Sounds like a simple constant current source.
Google it.




He said efficient. And he already got a far better answer from 'Ecnerwal'.

http://www.emanator.demon.co.uk/bigclive/joule.htm

I wish I could get a decent answer to my question on phase controllers. Got
to vent spleen for a moment here... Is Usenet fading out? Seems to be a few
serious people who keep to their own stuff, they help each other out but
virtuually ignore the rest of us. The rest seems to be handbags-at-dawn going
on for days between people who enjoy being tetchy to each other, and a few
sporadic posts that either go unanswered, or get answered by trite remarks
from smartasses who can't be bothered to read what they're answering. It's
not often been this bad in the last year or two, and I hope it gets better.

If I find an answer to my own question on phase controllers without blowing
up a decent drill trying it, I doubt I'll bother to post the answer as no-one
seems to care enough to help me. Obviously, I won't help in turn by supplying
info, especially as it's blindingly obvious that no-one here or in s.e.d.
cares anyway.
/rant. But it had to happen, as asking nicely for several days wasn't cutting
it, was it?
Click to expand...
Maybe nobody knows? That's what I figure happened.

Ed
 
ehsjr <ehsjr@bellatlantic.net> wrote in news:dAWnj.668$4f.98@trndny08:

If I find an answer to my own question on phase controllers without
blowing up a decent drill trying it, I doubt I'll bother to post the
answer as no-one seems to care enough to help me. Obviously, I won't
help in turn by supplying info, especially as it's blindingly obvious
that no-one here or in s.e.d. cares anyway.
/rant. But it had to happen, as asking nicely for several days wasn't
cutting it, was it?

Maybe nobody knows? That's what I figure happened.
Click to expand...
Fair enough. Could be so. There's usually enough high erudition floating
around here for me to doubt that though. I got a couple of answers, and added
some thoughts of my own about the subject. All feedback welcome. Even flames
are better than what I saw before.
 
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