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

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1: 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

Step 2: Adding LEDS

after you have the circuit cut you can begin filling LEDS to it
use as much space as you can beacuse you need maximum light

test to fit inside before making electrical connections


Step 3: Finished LED BOARD

if everything is ok
wire the leds and couple it to an 12dc alimentator
it should lit
check if there is any unlit led (or leds)
it can be blown or is in oposite polarity (you need to reposition it)

you can mount the tail ight on car

Homemade Holidays Contest

Participated in the
Homemade Holidays Contest

Be the First to Share


    • Furniture Contest

      Furniture Contest
    • Reuse Contest

      Reuse Contest
    • Made with Math Contest

      Made with Math Contest

    8 Discussions


    5 years ago on Introduction

    Haha that flasher must be going craaazy.


    Reply 9 years ago on Introduction

    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).


    Reply 9 years ago on Introduction

    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 :(


    9 years ago on Introduction

     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..

    1 reply

    Reply 9 years ago on Introduction

    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