Hi this is a way to make 12v led lights that can be used on any standard 2 pin 12 volt light for example your cars lights, inside your motorhome, boat or 12v home lights(like those for your desk or to light up your paintings or photos).. these are very common so you can replace them almost anywhere and are also very very cheap easy to make and you will be saving lots of electricity since they bearly consume any electricity..
you can make these of 4 or 2 leds or more if conecting them in parallel depending on size and how much light you will need
it pretty much ends up beeng the size of a small 12v car bulb
Step 1: Parts!!!
the parts for this project are as following
you will need (in picture)
1---- 100nf capasitor
1---- ln4007 diod
1---- 150ohm resistor **
4---- super bright white leds (i will be using some bright orange LEDs) *
* this is to make the 4 led version... if you want the 2 leds you will need a 348 ohm resistor instead
** the value of the resistor will also very with the input Voltage, the type of LED you buy and the Diod...
my led has a Forward Voltage of 2V (the white ones are 3.5V or somthing like that) and a max of 20 miliAmpers and my diod of 1.1V and i think a max of 1amp
so if you would like to calculate the exact value for your components you will need this information..
In the images i leave you a formula to calculate the resistor depending on your components..
in this formula (in the image)
V--------- is the voltage you will use to power the led
Vfled---- is the forward voltage of your led
Vfd------- is the forward voltage of your diod
Imax---- is the maximum voltage that your circuit can take so that would be your LEDs operation current
nºleds-- is the number of leds you will be conecting(if the resistor gives a negative number you passed the limit of leds)
Step 2: Circuit
the circuit is very simple just a bunch of leds in series with a diod to protect from any reverse voltages and a capasitor to filtrer any large spikes that can burn out the leds (Cars have many) and a resistor to limit the current .. the capasitor is optional but i recomend it specialy if its going on a car...
in the image you can see the circuit for a 4 led light with all the calculations..
((typo the image has to say 100nf capasitor not 1nf))
Step 3: Puting It All Together Step1
now for the fun part!!!!!
first some things you have to know... the short pin of the led is the negative (anode) end it also has a mark on the outside of the led..
on the diod the side without a shaded line is the negative (anode) side....
Start by soldering the resistor and the led as shown in image
the resistor is soldered to the catode(long pin) of the led
Step 4: Put It Together Step2
now we have to bend the catode of the new led and the anode of the one we just soldered and solder them together..
and remove the exces metal (dont cut the anode of the other led!!!) do this with all three.. and ditribute them in a squre...
Step 5: Put It Together Step 3
now you will have to bend the resistor to the other side so it takes up less space and solde the diod in series with the resistor...
after that you will have to solder the capasitor to the resistor (where the diod is conected) and the anode of the last led... (if you are lost just follow the schematics) (WARNING!!! dont hold the soldering iron to long or everything will fall apart!!!) and remove al extra metal
MAKE SURE THAT NO CONECTIONS ARE TOUCHING BEFORE CONECTING THEM TO POWER!!!!!!!!!!!!!!!!!!!!!!!
Step 6: Finish and Enjoy!!!
note: if it does not light up you might of conected it backwords ( dont worry the diod protects it from burning if conected backwords, just dont leave it to long backwords it may get damaged)
-change those always burning out lights from your car (LEDS HAVE A VERY VERY VERY LONG LIFESPAN)
-light up your car interioir
-make your car into a Fast and Furious neon(LED) light tunner AWSOMNESS!!..
-light up your gaden!! (insulate the leds first!!)
-light up your pool!! (at own risk)
-tranasform your motorhome or boat into low consumption LED ilumination...
controll them with a microcontroller
(these orange ones on the video are the ones i made and calculated for this instructable the white leds from the photos had 4.5V forward voltage so a diferent resistor was used and they were very bright!!!!!...)
any thing that can plug in a 2 pin 12v bulbs will work.. almost all car headlights and interior lights can use this and those 12v home interior lights..