after removing original front signal lights
check how much leds you can fit inside (you can use 12v leds in paralel or 2v leds in series)
for 12v leds you can have any number of leds
for 2v leds you ned to have an multiple of 7 (to be shure that you dont blow them)

this is how the finished light looks

original light was 21W bulb
now i have 7 LEDs 0.6W

this is ideal for an electric car

follow my electric car project here

Step 1: Cutting circuit to size

Picture of cutting circuit to size
you can use any non conductive material as support for leds (plastic)
i have used electrical test board cut to my size

BobyF11 months ago

Haha that flasher must be going craaazy.

yo man5 years ago
what is yo ride?
 dude, add resistors! ledcalc.com/ can help....besides that, great instructable!
jerpelea (author)  gman2000watts5 years ago
why should i add resistors
i have used 12V leds

There are no such thing as 12V LEDs. Vforward junction voltages come in at most the 4V range.

If these are sold as 12V LEDs, then they likely already have a small resistor soldered in already. THat being said, you NEVER NEVER NEVER specify a cars voltage system as 12V. Unless you want your LEDs to die. Car voltages fluctuate usually between 11-12 point something under load and 14 point something while charging. Let alone, there are often voltage transients that can get up into the 16-20V range (cars are electrically VERY noisy, as relays click on and off, compressors and pumps engage etc.)

Now you could EASILY get around this by using a simple LDO 12V regulator.

If done properly, the regulator will filter out all of the spikes and other nasties and provide a nice clean 12V source. Keeping your LEDs nice and happy.

Also I want to see pics of your turn signal in bright sunlight. I get the feeling it will washout (amber LEDs for some reason are the WORST at this).
jerpelea (author)  PedroDaGr85 years ago
i have used them in my car and are working nice
i will post the pictures for sigan lights but now is snowing so no sun :(

l8nite5 years ago
 nice "ible" but they sell led turn signal "bulbs" at pepboys and other parts stores, not sure what they draw and of course its always more fun to do yourself....AND u have bragging rights..
Doing it yourself, you can use actual quality LEDs, ie Lumileds Superflux Ambers (which are the ones commonly used in OEM tail lights). You can design it so that it survives with voltage regulators or buck drop regulators, to provide a clean source of power. Dirty power kills LEDs dead :-P