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LED tail light conversion


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lilboi 
Copper - Posts: 126
Copper spacespace
Joined: May 01, 2004
Location: United States
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?

archemedes 
Copper - Posts: 172
Copper spacespace
Joined: September 08, 2003
Location: United States
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
xetmes 
Silver - Posts: 586
Silver spacespace
Joined: May 18, 2003
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...

archemedes 
Copper - Posts: 172
Copper spacespace
Joined: September 08, 2003
Location: United States
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
Velocity Motors 
Moderator - Posts: 12,488
Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Fabrication. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member has been recognized as an authority in Mobile Security and Convenience. Click here for more info.spacespace
Joined: March 08, 2002
Location: Manitoba, Canada
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
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA
archemedes 
Copper - Posts: 172
Copper spacespace
Joined: September 08, 2003
Location: United States
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
lilboi 
Copper - Posts: 126
Copper spacespace
Joined: May 01, 2004
Location: United States
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.
lilboi 
Copper - Posts: 126
Copper spacespace
Joined: May 01, 2004
Location: United States
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
  • xetmes 
    Silver - Posts: 586
    Silver spacespace
    Joined: May 18, 2003
    Posted: August 02, 2004 at 7:38 PM / IP Logged  
    i would do sets of 3 with 120 ohm resistors...
    lilboi 
    Copper - Posts: 126
    Copper spacespace
    Joined: May 01, 2004
    Location: United States
    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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