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Old 11th May 2009, 17:19   #151
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The cabin light has a small delay before it turns off. maybe thats what they meant by dimmer.
http://www.team-bhp.com/forum/modifi...ml#post1182085

check out my number plate light setup here. I bought a spare pair of lamps since you'll have to dismantle them

For how to wire the LED's , please refer to the pic in the following site
LED Series Resistor Calculator
thats how the resistor should be connected

can you show a pic of how you connected the resistors before you connected them

to get an idea , this is how i did them the first time

I'm using PCB setups now

about the BLUE LED's under the dash - thats a matter of personal taste. I wouldnt do it. Would be too much bling :P
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Old 11th May 2009, 20:04   #152
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@Greenhorn: Going by what Rahul has mentioned, he seems to have connected all the LEDs parallel to each other, as well as the resistor. I'm willing to bet on that.
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Old 11th May 2009, 20:57   #153
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rahul, I hope that you are aware that LED's work only when connected the same way, so whether connecting them in series or parallel, make sure that the + is connected to the - of the next , and so forth. the 'flat' edge of the LED can help you identify which is the +ve
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Old 11th May 2009, 22:47   #154
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Greenhorn,

LED's generally have the +ve leg slightly bigger than the -ve ones, which is a fair enough sign to know the terminals. I had connected the +ve end of one led to the -ve end of the other leading to one +ve end free and one -ve end free to connect to the battery terminals. But it did not work.

As benbsb29 has pointed out, I have connected all +ve terminals together with the resistor end and all -ve terminals together leading toa parallel setup. Connected this to the battery terminals inside the cabin lamp.

About the number plate lamps, I hope they are same for the indigo and the indica, i mean the method of fixing and removing them is the same. I tried to open them up but it seems only the bulb holder comes off for a replacement. Need to check how I can make an LED setup to fit in the holder.

In some cars I have seens LED's or may be neons fixed beneath the door handles. Does anybody have any idea what are they and how are they fixed there...

I may sound a bit dhin-chak here...but it just came in my mind and so asking...

Regards,

Rahul.
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Old 11th May 2009, 22:52   #155
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yup, You'll need to dismantle the number plate lamp assembly.Since the glass is tilted one way, i used a pair of pliers to twist the edge that was slightly exposed. This lead to it being detatched from the glass. was eventually able to remove the whole thing. If you remove it carefully without breaking anything, you can press fit the glass back.

Since I've been experimenting with various LED and resistor combinations, I've never stuck the glass back with glue. But even otherwise it is pretty well seated. have run over 2000km so far this way

if you are running the LED's in parallel, then use a resistor of the value 500 divided by the number of resistors ( and use a half watt or higher power capacity resistor)

Last edited by greenhorn : 11th May 2009 at 22:55.
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Old 11th May 2009, 23:12   #156
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HI,

Just came across a site selling LED bulbs for all applications...

Super Bright LEDs

Regards,

Rahul
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Old 12th May 2009, 13:14   #157
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I always wanted to do these kind of stuff but don't have much knowledge on electronics which made me to keep away from these stuffs. However this thread fascinated me, not complex and let me try it. Today I took the cover and saw the setup in my SX4.

Looking the page 1 pictures I could find that the long one in the holder is a -Ve terminal.
Can you tell me if I have marked it correctly in the following pic.Benny's first DIY : LEDs on an Ikon-dsc00209.jpg


Wondered how the LEDs in the TV doesn't fail, learnt from this post that it is because of high resistors. Even 2 of my LED indicators failed on one side. I would like to setup LED dome light with less failures.

The dome light is 12 V 10 W. I would like to setup 9 White LEDs (violet tinge) in parallel for more brightness. what would be setup and what type of LEDs I have to buy and the wattage.

reference: LED Circuitry tutorial: how to hook up LEDs.

Questions in my mind:
1. The bulb doesn't have + or - identification. Will it get short circuit if I wrongly place it in the holder.
2. I knew that there is a fuse when I open the hood, does it have only one fuse or multiple fuse for different lights.
3. Though the power generated is 12 V DC, will there be any shock if I touch the wires directly ? any precautions to be taken, sorry for my poor knowledge.
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Old 12th May 2009, 13:35   #158
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Quote:
Originally Posted by gopinathann View Post

Looking the page 1 pictures I could find that the long one in the holder is a -Ve terminal.
Can you tell me if I have marked it correctly in the following pic.Attachment 135463
Just buy a Multimeter and check the leads or take a 5mm LED(blue or white), solder a 470 ohm resistor to its +ve leg and clarify the +ve lead(on your dome) by trial and error.

Quote:
Originally Posted by gopinathann View Post
The dome light is 12 V 10 W. I would like to setup 9 White LEDs (violet tinge) in parallel for more brightness. what would be setup and what type of LEDs I have to buy and the wattage.
Refer to this post : http://www.team-bhp.com/forum/modifi...ml#post1097837

Quote:
Originally Posted by gopinathann View Post
Questions in my mind:
1. The bulb doesn't have + or - identification. Will it get short circuit if I wrongly place it in the holder.
NO

Quote:
Originally Posted by gopinathann View Post
2. I knew that there is a fuse when I open the hood, does it have only one fuse or multiple fuse for different lights.
There ll be many fuses but usually each fuse will cater to a small cluster of electronics(for example: In my scorpio a single 5amps fuse controls the speedo cluster lights and power window switch lights)

Quote:
Originally Posted by gopinathann View Post
3. Though the power generated is 12 V DC, will there be any shock if I touch the wires directly ? any precautions to be taken, sorry for my poor knowledge.
I ve touched the terminals a lot of times but never got electrocuted.

Last edited by badboyscad : 12th May 2009 at 13:39.
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Old 12th May 2009, 14:08   #159
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Quote:
Originally Posted by gopinathann View Post
Questions in my mind:
1. The bulb doesn't have + or - identification. Will it get short circuit if I wrongly place it in the holder.
2. I knew that there is a fuse when I open the hood, does it have only one fuse or multiple fuse for different lights.
3. Though the power generated is 12 V DC, will there be any shock if I touch the wires directly ? any precautions to be taken, sorry for my poor knowledge.
1. Normal bulbs don't have any polarity. They can be connected any way. They will fail only when you apply more voltage than they are designed for.

2. Most small light clusters in one location will come under one fuse. You will have to check this out for your car model.

3. 12 V car battery will not even give you a tingling sensation when touched. There is a saying - It is the Volts that Jolts and Mills that kills.
Meaning that voltage will only jolt you and the current measured in amperes or milliamperes which kills.

Depending upon other factors, you will feel a "shock" only when the voltage increases beyond 45 V. But a car battery can supply plenty of current - hundreds of amperes for a short period.

Unless properly fused, any short circuit in your car can potentially result in a fire.
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Old 12th May 2009, 14:14   #160
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Quote:
Originally Posted by gopinathann View Post
The dome light is 12 V 10 W. I would like to setup 9 White LEDs (violet tinge) in parallel for more brightness. what would be setup and what type of LEDs I have to buy and the wattage.
Here is a small pictorial representation of my setup:

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All LEDs are 5mm blue and all resistors are 820 ohms 1/4watts.
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Old 12th May 2009, 14:15   #161
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Gopinath, keep some spare fuses ready. You may just end up blowing a couple in the process. I blew one.

That aside, this DIY is not difficult to realize.

EDIT : Senthil, why dont you show him the circuit with the white LEDs he is looking at, with the resistor value which would be useful for him?

Last edited by benbsb29 : 12th May 2009 at 14:16.
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Old 12th May 2009, 14:56   #162
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Guys, thanks for the quick response and knowledge. To start with I will use 2-3 LED and make it work at home.
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Old 12th May 2009, 15:40   #163
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Quote:
Originally Posted by benbsb29 View Post
EDIT : Senthil, why dont you show him the circuit with the white LEDs he is looking at, with the resistor value which would be useful for him?
The circuit in post #160 can be used for 5mm white LEDs too.

I prefer parallel connection instead of serial one, because the parallel connection with 1 resistor(470 ohms) per LED tends to last longer.

Here is a pictorial for parallel connection:

LEDs may be blue or white 5mm.
Resistors are 470 ohms 1/4 watts.

Benny's first DIY : LEDs on an Ikon-9-par.jpg
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Old 12th May 2009, 17:49   #164
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bbs, if you prefer parallel connection with 470 ohm, try running the 3 in series with 220 ohms. should give you similar light.

running 3 in series is better since its is more efficient
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Old 13th May 2009, 21:05   #165
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finally managed to get some batteries for my cam. here are the pics of my boot light setup. 4x3 Super bright LED's - my most recent attempt = major BLING

pity nobody will get to see it , except the petrol pump attendants. some work on the levels in photoshop to make the lit areas visible
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