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would this be a problem? leds, 08 tundra


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jaykiller1 
Member - Posts: 6
Member spacespace
Joined: September 27, 2011
Location: Louisiana, United States
Posted: September 28, 2011 at 2:03 AM / IP Logged  
Hello all,
First I am JD. I have been a lurker on here for a lil while and have learned a good bit. I am preparing to install some leds on my truck but I just wanna get some opinions before I jump on this.
Setup:
2008 Tundra SR5 Double Cab
These leds:
The LEDs that I am wanting to use.
I want to put two on each running boards. One at each end. Also I choose the amber color.
I would like to do this so that they correspond with the interior lights. The 08 Toyota has dimming interior lights and I would like the leds to match that behavior.
Thanks,
JD
Until you sign a blank check to your government in payment in the form of your life. You can not really say anything to upset me!! Have a good day!
jaykiller1 
Member - Posts: 6
Member spacespace
Joined: September 27, 2011
Location: Louisiana, United States
Posted: September 28, 2011 at 2:05 AM / IP Logged  
Here is the address in case the link does not work.
http://www./itm/190578079828?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649#ht_4948wt_1014
Thanks,
JD
Until you sign a blank check to your government in payment in the form of your life. You can not really say anything to upset me!! Have a good day!
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: September 28, 2011 at 6:10 AM / IP Logged  
Incomplete URL.
The LEDs won't dim with the interior lights unless it's a PWM dimmer, and most are analog (they simply drop the current).
i am an idiot 
Platinum - Posts: 13,667
Platinum spaceThis member consistently provides reliable informationspace
Joined: September 21, 2006
Location: Louisiana, United States
Posted: September 28, 2011 at 8:07 AM / IP Logged  
They will dim, just not in a linear fashion. It would be like the fuel gauge on an old 280ZX, the 1/8 tank to empty gauge will be at full tilt till it reaches 1/8 tank of fuel, then it begins to go down as well. The LEDs will not begin dimming until the Incandescent lamp is almost all the way out.
Spark, how are you going to reduce the current without reducing the voltage??
jaykiller1 
Member - Posts: 6
Member spacespace
Joined: September 27, 2011
Location: Louisiana, United States
Posted: September 28, 2011 at 4:28 PM / IP Logged  
Thanks for the quick replies. Ok so I figured as much. Had to ask though. Another question for y'all in relation to this job. Where would y'all recommend wiring these to?
Thanks
JD
Until you sign a blank check to your government in payment in the form of your life. You can not really say anything to upset me!! Have a good day!
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: September 28, 2011 at 5:12 PM / IP Logged  
i am an idiot wrote:
Spark, how are you going to reduce the current without reducing the voltage??
PWM - LEDs do not dim linearly with resistive drops whereas PWM is essentially proportional dimming and matches most lamps.
Try a LED on a normal dimmer - it will barely dim until it eventually drops off radically.
jaykiller1 
Member - Posts: 6
Member spacespace
Joined: September 27, 2011
Location: Louisiana, United States
Posted: September 28, 2011 at 5:28 PM / IP Logged  
Here is the link again. Hope it works.
https://item.mobileweb./viewitem?itemId=190578079828&index=2&nav=WON&nid=56765977853&trxId=587780716009
Until you sign a blank check to your government in payment in the form of your life. You can not really say anything to upset me!! Have a good day!
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: September 28, 2011 at 8:20 PM / IP Logged  
No - it lacks the "com", but even that isn't enough....
But in essence, LEDs is LEDs. If they are 12V, they can be powered in parallel to any 12V item.
And typically being lower in current (eg, 20mA per series string compared to 250mA for a 12V/3W bulb) they have negligible load effect. (EG - they are several tens ot hundreds of Ohms and thence can be placed across speakers.)
But they will not dim like bulbs, nor dim proportional to voltage (nor current?).
jaykiller1 
Member - Posts: 6
Member spacespace
Joined: September 27, 2011
Location: Louisiana, United States
Posted: September 28, 2011 at 10:51 PM / IP Logged  
Well let me try it like this then:
would this be a problem? leds, 08 tundra -- posted image.
Uploaded with ImageShack.us
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Until you sign a blank check to your government in payment in the form of your life. You can not really say anything to upset me!! Have a good day!
jaykiller1 
Member - Posts: 6
Member spacespace
Joined: September 27, 2011
Location: Louisiana, United States
Posted: September 28, 2011 at 11:04 PM / IP Logged  
spark something you said got me wondering..about being paralleled. So if I ran one pos and one neg all the way around the underchasis I should be able to tie into each wire and all the way around.
___________________________________{-}
____________|___________________|__{+}
    |+     -|          |+      -|
    |       |          |        |
     \     /            \      /
      [LED]              \[LED]
Sorry if this looks a bit silly but it was the best
I could do.
Still looking for suggestions as to where to tie in to for power.
Thanks
JD
Until you sign a blank check to your government in payment in the form of your life. You can not really say anything to upset me!! Have a good day!
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