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the12volt`s installbay - Mobile Electronics Forums the12volt's install bay / Lights, Neon, LEDs, HIDs

Subject Topic: LED tail light conversion (Topic Closed Topic Closed)

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lilboi
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Posted: August 01, 2004 at 7:57 PM - IP Logged  

I want to do a LED tail light conversion. How would i do this? I have about 200 orange led's laying around. I don't plan to ues all of them. How would i wire this to a board?

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archemedes
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Joined: September 08, 2003
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Posted: August 01, 2004 at 9:16 PM - IP Logged  

I made some with red ones, and just wired them onto a piece of circuit board, and then added a resistor to get the right voltage to teh lights, if you use enough led's though you don't need the resistor. I'll see if I can find my instructions
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xetmes
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Posted: August 01, 2004 at 9:19 PM - IP Logged  

what is the forward voltage? the current you want through them?

I have done these for smaller lights, very time consuming but looks good if you take your time.

first figure out how many you want in each series branch (by the voltage and current ratings) then just decide how many series branches to parallel together (as many as you want), I usually just use predrilled perfboard (with the copper donuts), break out the soldering iron and go nuts...

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archemedes
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Posted: August 01, 2004 at 9:27 PM - IP Logged  

here's the site I used to build mine, and they worked great
http://www.myra-simon.com/bike/LEDlight.html
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Velocity Motors
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Posted: August 02, 2004 at 7:51 AM - IP Logged  

Why not buy some LED bulbs, they are cheap ( about $ 3.50 per bulb ) and they have them in 1156, 1157 and 3156
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Velocity Custom Home Theater
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archemedes
Copper
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Posted: August 02, 2004 at 3:10 PM - IP Logged  

because the ones available are junk, I can't use them in my bravada because of the poor qc, and they are $10 each last time I got some
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lilboi
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Posted: August 02, 2004 at 7:32 PM - IP Logged  

I heard they arn't great. I want to be able to have a whole line of leds.
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lilboi
Copper
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Posted: August 02, 2004 at 7:35 PM - IP Logged  

  • Forward Voltage (V) : 3.2 ~ 3.8
  • Reverse Current (uA) : <=30
  • Max Power Dissipation : 80mw
  • Max Continuous Forward Current : 30mA
  • Max Peak Forward Current : 75mA
  • Reverse Voltage : 5~6V
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    xetmes
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    Posted: August 02, 2004 at 7:38 PM - IP Logged  

    i would do sets of 3 with 120 ohm resistors...
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    lilboi
    Copper
    Copper
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    Posted: August 02, 2004 at 8:16 PM - IP Logged  

    So wire them like (if i wanted 30 leds)

    + _____ [resistor] _____ (+ -) _____ (+ -) ___ (+ -) _____ -
    + _____ [resistor] _____ (+ -) _____ (+ -) ___ (+ -) _____ -
    + _____ [resistor] _____ (+ -) _____ (+ -) ___ (+ -) _____ -
    + _____ [resistor] _____ (+ -) _____ (+ -) ___ (+ -) _____ -
    + _____ [resistor] _____ (+ -) _____ (+ -) ___ (+ -) _____ -
    + _____ [resistor] _____ (+ -) _____ (+ -) ___ (+ -) _____ -
    + _____ [resistor] _____ (+ -) _____ (+ -) ___ (+ -) _____ -
    + _____ [resistor] _____ (+ -) _____ (+ -) ___ (+ -) _____ -
    + _____ [resistor] _____ (+ -) _____ (+ -) ___ (+ -) _____ -
    + _____ [resistor] _____ (+ -) _____ (+ -) ___ (+ -) _____ -
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