Join Date: Feb 2000
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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>