Re: [Amc-list] Blue LED tamed

[Wrambler242@xxxxxxxxxxx]

Tom, fools with this stuff a lot. He has offered to send me an assortment to try.
I have an led flashlight too, it is possible to dim the leds down with lower voltage thru resistors. It's just a matter of finding the right value.
  I don't know that it is worth all the effort to dim this one though! A red led indicator for highbeams will do if I fail.
I'd really like to know who the guy was that installed this particular blue led as an an indicator! It is flashlight quality!
If it's housing was not one of the nice ones I've seen I would not even bother trying to tame it! If I fail I may try to replace the led in the holder with a dimmer one. RadioShack does have some of those in stock!
  If I can't get the intensity I want from this one and can't remove it from the holder, I may drill an 1/8" hole in my billet panel then rear mount a 5 or 8mm led in a partially drilled thru hole from the rear. It would be nearly invisible when not lit. Since it is high beam it should be visible at night easy.
  How's that tranny coming???
I started my next project. I wanted to do something easy to my driver Dakota Quad cab.
I've decied to buck the trend and dare do be different. I did some extensive reading over the weekend and am going to lower it 2-3 inches. I'm mostly after better handling and am wondering if it will improve mpg any. I don't ever do anything off-road in it. I wouldn't even have a 4X4 if it wasn't for the winters, and the boat.
  What I've read indicates the 4X4 dakotas will drop easily  using rear drop shackles for an 88 up Chevy 1/2 ton and the front can be dropped by backing off the torsion bars and installing shorter bumpstops. The only other recomendation is to install some stiff shocks such as Bilstiens or KYBs to help alleviate the soft ride from backing off the torsion bars. 
   So far with the purchase of the shackles and bumpstops I will hve a whole $65 in a 2" drop! And totally reversable if needed.
   Firestone has an add on airbag kit for hauling for the Dakota too. Some guys have reprted using the kit and removeing the overloads to allow more rear drop since the trucks end up not being quite level with 2" shackles.
  I've always wnated a nice low two wheel drive truck. I'm going to see if I can fake it and end up with the best of both worlds.
  Off topic, yeah, rambling, yeah, quilty.
Back at work, can't do anything, bored, 
Thanks for the led input! 
--
Mark Price
Morgantown, WV
1969 AMC Rambler, 4.0L, EFI, T-5

 -------------- Original message ----------------------
From: Keleigh Hardie <keleigh3000@xxxxxxxxx>
> I think the problem here is that LEDs use next to no current, so the 
> resistor doesn't have anything to work with. I have an LED flashlight, 
> it starts at three volts, and down to about two the brightness hardly 
> varies maybe only 10-15 percent. I'm not sure changing the voltage to 
> your LED within it's operating range would vary the brightness much. The 
> only two options I can see are A) pulse width modulation. This basically 
> flashes the LED so that it's off 50, 60, 70 etc. percent of the time. It 
> would have to be very fast so your eyes perceive it as a dimmer steady 
> light. Or 2) find a dimmer blue LED...
> 
> Keleigh
> 
> Wrambler242@xxxxxxxxxxx wrote:
> > OK, I give up!
> > :] Since I now have a too bright led with a dead resistor, what do I install 
> to get it as dim as possible and still lite???!!!
> > 150 ohms? 15K ohms? Anyone know what the resistance is of say a 194 lamp? 
> Maybe I can use some of those to gauge what resisitor I need?
> > I just need a blue glow for a high beam indicator, or I'm going to surrender 
> and use th eleftover red one I have! It ain't broke and is fa dimmer than the 
> blue laser!
> > --
> > Mark Price
> > Morgantown, WV
> > 1969 AMC Rambler, 4.0L, EFI, T-5
> >
> >  -------------- Original message ----------------------
> > From: Tom Jennings <tomj@xxxxxxx>
> >   
> >> On Sun, 4 Mar 2007, Widiker, John D wrote:
> >>
> >>     
> >>> This Blue LED is not a tiny cute one, it's a freaking laser, it's burn
> >>> your retinas bright, 200 did absolutely nothing at all. The same one he
> >>> has we used 15K on and it was tolerable and hasn't had an issue in 3
> >>> weeks of use.
> >>>       
> >> Maybe you mean 150 ohms?
> >>
> >> But but... 15K ohms (15,000) means 100 times LESS current than
> >> 180 ohms... any LED ever made since 1970, with 15,000 ohms on
> >> 12 volts, you won't be able to see it.
> >>
> >>  	      E
> >>         I =  -----
> >>                R
> >>
> >> I is current. E= 12. Bigger resistor R, less current. Less
> >> current, less power, less brightness.
> >>
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