More questions about making LED tail-lights... - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

Reply
 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 02-13-2001, 11:29 PM Thread Starter
Keyboard Implanted
 
jamgood96's Avatar
 
Join Date: Jun 2000
Location: Tualatin, Oregon, United States of America, North America, Earth, Milkyway Galaxy, Universe...
Posts: 3,932
Thanks: 0
Thanked 0 Times in 0 Posts
 
More questions about making LED tail-lights...

Okay, I've been doing some thinking about this. Now, someone had said not to hook the LED's up in series, cause if one goes, they all go. That makes sense. So do I hook each seperate LED up to it's own resistor? I had another thought. What do I do to seperate brake lights from parking lights? Do I need differnet LED's or different resistors or what? Now how am I going to hook all of these up? I was thinking of getting one of those kits at Radio Shack for making PC boards. Would that work? Also, I didn't really find crap for selection of LED's at Radio Shack. Where else should I look? I know, some of you are probably just think why not just use the round LED tail-lights or just live with what you've got. Well, I'm bored and feel like tinkering Hehehe...

"James and the Giant Jeep"
1993 Wrangler 4.0/5spd, Herculined Interior, D44s Soon
jamgood96 is offline  
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 02-13-2001, 11:44 PM Thread Starter
Keyboard Implanted
 
jamgood96's Avatar
 
Join Date: Jun 2000
Location: Tualatin, Oregon, United States of America, North America, Earth, Milkyway Galaxy, Universe...
Posts: 3,932
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: More questions about making LED tail-lights...

I just came across this. Looks pretty sweet, UNFORTUNETLY it's $189.05!!! That's outrageous. My thought was where are the resistors?? It doesn't look like there's any room what-so-ever. The weird thing is, I'm actualy starting to think I might be able to do this Hehehehe...



"James and the Giant Jeep"
1993 Wrangler 4.0/5spd, Herculined Interior, D44s Soon
jamgood96 is offline  
post #3 of (permalink) Old 02-13-2001, 11:50 PM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: More questions about making LED tail-lights...

LED's when one goes they will all go. The only way to burn one up is two much voltage and it will get all of them usally. There's nothing to brake they last just about forver. I install them on jobs, some over 18 years ago and I have never replaced one yet. I use them at work for 12 or 24 volt quick power indication. Look in the yellow pages for a Electronic Equipment & Supply Whsle & Mfrs. They will have the LED's and bread boards. Also there is the bakealite board that can be used but you will have to soider or crimp the LED's.The lites will have one lead + positive for the stop and one for the parking. The ground is the body. Hook up one wire to the first + positive LED of the 8 string and the other - lead to the body ,or a short wire to ground. The other + positive lead hook up the next LED string of 8 and hook the - lead together with the other. Also start another string of 8 to the back up light as noted above. I have seen some new clear LED's at a Raido Shack. Hope this helps.

79 CJ5 258 firecracker red
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 02-14-2001, 12:01 AM Thread Starter
Keyboard Implanted
 
jamgood96's Avatar
 
Join Date: Jun 2000
Location: Tualatin, Oregon, United States of America, North America, Earth, Milkyway Galaxy, Universe...
Posts: 3,932
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: More questions about making LED tail-lights...

So you think I could get away with putting them in series, since they last so long? I didn't quite understand the part about having on lead + positive for the stop and one for the parking. Don't LED's just have 2 wires coming out of them? So how do you get them to be brighter for stopping and dimmer for just parking lights? How many LED's do you think I should neen to get them bright enough? Any ideas? Should I use ALL white LED's or just white for reverse lights, and red behind the red lense? I'll probably have a few more questions and I hope that's okay, swcobb? Thanks!

"James and the Giant Jeep"
1993 Wrangler 4.0/5spd, Herculined Interior, D44s Soon
jamgood96 is offline  
post #5 of (permalink) Old 02-14-2001, 12:35 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: More questions about making LED tail-lights...

yes. the old wires from your standard bulb. When you put your foot on the brake 12 volts dc will be on one of the leads. When you turn on your parking lights the other lead will have 12 volts on it. When you have your lights on and your brake on both will be on and this is what makes it look brighter. I dont know about any except the red ones but there's lots of differnt ones out there now. Some now have the ability to have three in one LED. It will be trial and error on which one will look the best. LOL

79 CJ5 258 firecracker red
post #6 of (permalink) Old 02-14-2001, 12:44 AM Thread Starter
Keyboard Implanted
 
jamgood96's Avatar
 
Join Date: Jun 2000
Location: Tualatin, Oregon, United States of America, North America, Earth, Milkyway Galaxy, Universe...
Posts: 3,932
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: More questions about making LED tail-lights...

Oh, okay... I get how the brake and parking light thing works. So do I hook one of the leads up to a set of LEDs, and the other lead to another set, or what? What makes the LEDs brighter for the brake lights? Also, how do I go about making this setup? Since I don't need any resistors, I just put them on a bord or what? Any idea how many LEDs I could run off of the 12V line for the tail-lights?

"James and the Giant Jeep"
1993 Wrangler 4.0/5spd, Herculined Interior, D44s Soon
jamgood96 is offline  
post #7 of (permalink) Old 02-14-2001, 01:11 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: More questions about making LED tail-lights...

yes. nothing except for the element it self. Look at one and you can see the difference. one is longer that the other which draws more current and makes it brighter. For this set up I would try 7 to 9 for brighter or dimer.The more you put on the brighter it will be. They all light at the same level. More {wrong it just wont light if you put to many in line}or less then you will need to put resistors in line with them. One thing you could try is a small adjustable resistor in line with them to use less LED's. Bread boards would work fine. Plug the LED's into the holes in series then the ground lead to the body or a short lead from the body. The + positive lead we talked about before hook them in to the first LED.

79 CJ5 258 firecracker red
post #8 of (permalink) Old 02-14-2001, 01:40 AM Thread Starter
Keyboard Implanted
 
jamgood96's Avatar
 
Join Date: Jun 2000
Location: Tualatin, Oregon, United States of America, North America, Earth, Milkyway Galaxy, Universe...
Posts: 3,932
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: More questions about making LED tail-lights...

I'm not quite following you on some of this[img]/wwwthreads_images/icons/frown.gif[/img] What exactly were you talking about when you said "nothing except for the element it self. Look at one and you can see the difference. one is longer that the other which draws more current and makes it brighter"? You were talking about a small adjustable resistor. Could I use that for the parking lights, so that they'd be dimmer. And then just run the LED's regulary for the brake lights? Make sense? Hope I'm not annoying you with these questions No what numbers do I have to go by? Just the voltage of the LED's, or anything else? What I mean is there any other numbers in the specs of the LED's that I need to consider before wiring them?

"James and the Giant Jeep"
1993 Wrangler 4.0/5spd, Herculined Interior, D44s Soon
jamgood96 is offline  
post #9 of (permalink) Old 02-14-2001, 03:35 AM Thread Starter
Keyboard Implanted
 
jamgood96's Avatar
 
Join Date: Jun 2000
Location: Tualatin, Oregon, United States of America, North America, Earth, Milkyway Galaxy, Universe...
Posts: 3,932
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: More questions about making LED tail-lights...

swcobb, I found this website with some good info on setting up LED's. Check it out. What do you think of it?

http://www.theledlight.com/LED101.html

"James and the Giant Jeep"
1993 Wrangler 4.0/5spd, Herculined Interior, D44s Soon
jamgood96 is offline  
post #10 of (permalink) Old 02-14-2001, 08:21 AM
 
Join Date: Feb 2000
Posts: 1,181
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: More questions about making LED tail-lights...

Wow, it's getting deep in here jam! I just got through reading the link you posted, it has good info. Pay particular attention to the selection of the "droppping resistor", both it's value and power rating. Too small a resistor will allow too much current into your diode and possible blow it, too much will not allow it to light.
I did not see where the author was going with the series discussion. You can only hook so many led's in series, as the voltage drop across each one will start to add up, though the current will be the same through all of them.
As to the park and brake difference, I'd put, say 40 lights in the mount. Have about 20 of them light up when the parking lights are on and have all of them light up then you hit the brakes (i.e. the other 20 hooked to the brakes, since the parking ones will stay on when you hit the brake).
You definitely need to start with a prototype and practice!
As to acquiring led's, call up led manufacturing companies and ask for samples! They will all send you 5 or 10 samples no problem, expecially if you have them shipped to a company address. Buying them from radioshack at a $2 a pop will add up. You want the ones with the most lumens per mA.
Also, remember that led's are light emitting DIODES! They have an anode and cathode terminal and are polarity sensitive.
Keep us posted on your progress! If you are having problems finding specific resistor values let me know and I can mail you some (we have quite a bit here at work).

[img]/wwwthreads_images/icons/cool.gif[/img] Big Ed
<font color=red>'88 YJ, 4" susp,3" body,35's,283 Chevy V8,TH350,4.11's,D30,D35c</font color=red>
v8jeep is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome