Replace bulb 12V with LED

Replace bulb 12V led

  many have the problem that if you leave the doors open or a poorly closed inside 7W light stays lit, and as to not notice you run out of battery in a few hours.
Apart from the fact that you get shot, lead acid batteries can be recharged rarely; It leaves deep discharges very damaged, reducing their capacity.

The simple but impractical solution is to remove the Interior lamps, but there is another solution that is more fun and useful: change the leds.

What is a led?
It is an diode or light emitting semiconductor, used so far in electronics for its durability and low consumption, less than fluorescents for the same brightness.
Whites are suitable to replace small lights (headlights, light position, presence etc) but are still very expensive if you want to light up a room (we need 150 leds to replace a conventional bulb 50W), also have to be directed in all directions, due to the small reflector that drives inside circuit, its light is very directionalIt is not dispersed by the entire stay.

Leds are also widely used in modding, where are typically also use RGB leds, 4 feet, that we can get the entire spectrum of colors with different combos of intensity.

Usual led (c) Elforro.com - Guide led

Where to get them
Leds come in Chinese, very cheap flashlights (with a long battery life), and also you can buy already prepared to replace car lamps (click) or loose.
Certainly as cheap and entertaining is to make your own bulb adapted to the 12-volt car.

He had a flashlight that I used on the bike (and eventually replaced by other more appropriate), which uses 3 white leds of high-performance, about 4 volts.
Just disassemble and change the position of the wiring (which is in parallel) series so that they can use directly 12V (4 x 3 = 12), as seen in the image.

First you have to cut the original tracks, I have used a dremel or rotalin with a small blade, but is also true with wears with something sharp.
Then, starting from one side, will joining a diode with other investing the Poles (the positive of the former with the negative of the next) to put them in series. By connecting them as well, the rated voltage of the circuit will be the sum of the voltages of the elements, the same thing would happen with the resistance. In this way we can make tailored to the required voltage leds bulbs.
The downside of putting them in series is that if one of the leds is broken or defective, none will illuminate (to not run current on it).

If we connected them in parallel the voltage received by each led is the nominal voltage, so in that case it is important to not put a few leds on less voltage than others.

It is interesting to do with a tester and a transformer to make sure everything is correct.

Placing them in the car
In this case, as the site where van leds is spacious, I left the baffle that shipped with the flashlight to better direct the light to stay.

Once soldiers with the soldering to retainers of copper from the previous bulbs, we fix them in place with the termoencoladora. It is important to check the polarity, since if we invest, the leds will burn in a microsecond, there is no room for error.

Following the success with the white leds, I also changed the lamp used to illuminate the Copilot map by 3 blue leds (of high intensity, for modding) and soldiers, subject to the little transparent window also with termoencoladora:

These blues are 3.5 volts, and subjecting them to one slightly higher voltage will shorten its life considerably, but as they will not be many lit hours... well so they stayed.

The result is impressive, especially at night, and the brightness of 3 leds with a 0.5 Watt consumption is virtually the same as the of a 7 W incandescent bulb.

Already the battery not will empty us, and we have customized the car a little bit.

Curiosity: did you know that CMOS chips used in digital cameras can capture infrared light, and other ranges of light that the eye does not capture? If you have doubts if a remote control is working, so you can check it, watching it on the camera screen.