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Old 9th February 2009, 23:47   #16
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Going through your thread, i realized how similar it is to the one i had done. Then i saw this.

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Originally Posted by sonirohit View Post
Yeah - that was my inspiration for this DIY
Good job. Using a PCB was a good decision. Would make sense to use a resistor in each series connection to preserve the life of the LEDs.
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Old 10th February 2009, 09:49   #17
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its easy. uscrew it - the screws should be above the number plate. the tough job is in dismantling the light without breaking it. will post a howto this weekend
Checked the Number Plate Lights in Swift - it's not an assembly similar to dome lights but screw-in type bulbs... How Cheap about Maruti :(
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Old 10th February 2009, 09:57   #18
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Originally Posted by benbsb29 View Post
Going through your thread, i realized how similar it is to the one i had done. Then i saw this.



Good job. Using a PCB was a good decision. Would make sense to use a resistor in each series connection to preserve the life of the LEDs.
I had originally planned to make a color selectable set of lights using a 2(or 3 way switch)... ex I just flick the switch & lights change their color from White to Blue or yellow or any other color... But after I started off realized - I'd have to cut a hole in the dome light to fix the switch, so decided I'd just go with plain white LEDs...
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Old 10th February 2009, 10:03   #19
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Originally Posted by sonirohit View Post
Checked the Number Plate Lights in Swift - it's not an assembly similar to dome lights but screw-in type bulbs... How Cheap about Maruti :(
You better stop examining such stuff. Else you'll find everything about the Maruti is indeed cheap
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Old 10th February 2009, 16:19   #20
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Originally Posted by sonirohit View Post
Yes that should get you the same results initially - the voltage across each set of these 4 parallel LEDs would be approx 3-3.5 V.
Thanks man...will give it a try. Will update pics as well
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Old 4th October 2009, 21:39   #21
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Default led dome light

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Originally Posted by sonirohit View Post
No - since I've used 4 LEDs in series any resistors have not been used
for 12v power supply, we need 4 5mm led's in series which can be connected without the resistor?
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Old 5th October 2009, 11:52   #22
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Originally Posted by S.I.N.G.H View Post
for 12v power supply, we need 4 5mm led's in series which can be connected without the resistor?
I did't quite get the question -

however to explain my setup - I have 4 10 MM LEDS in series without the resistors (White), and have 6 of these sets wired in parallel.

I also have a similar setup of blue LEDs but only 3 sets wired in paralell. Initially used them without a resistor - but there were 2 problems - the light was too bright and 2nd the LEDs kept failing frequently. So I added a 1K 1/2 Watt resistor for the blue ones (one for the entire setup and now it's fine for 5 months.)

I also have a 3 way switch - which is used to make the entire dome light color selectable - on a flick I can change from Blue to white and vice-versa.
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Old 5th October 2009, 12:15   #23
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Originally Posted by theEnd View Post
any scope for putting together an LED fog light? Not really used for illumination but more as daytime/nightime running lights.
I'd say keep the fogs intact and mount them on the plastic thingies surrounding the fogs
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Old 5th October 2009, 16:33   #24
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Default led setup

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I also have a 3 way switch - which is used to make the entire dome light color selectable - on a flick I can change from Blue to white and vice-versa.
wow. thats great. could you please enlighten me more on this. pics would be helpful.
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Old 5th October 2009, 20:58   #25
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Thats indeed really cool idea, and very cheap indeed
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Old 27th March 2010, 16:02   #26
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Originally Posted by shreyasma View Post
@sonirohit,

I am no electronics guy. Can I buy 16 10mm LEDs and connect 4 in parallel and then 4 sets of parallel ones in series and just feed them with 12 v?

There was a ready made one in an accessory shop with 24 mobile phone kind of small leds. The dealer quoted 1200 for one light change.
The led's you are talking about are SMD Led's Mostly used in Mobile as camera or Backlight under Keypad. I think the Dealer is quoting you high price as you are no electronics guy.
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Old 27th March 2010, 16:16   #27
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Quote:
Originally Posted by S.I.N.G.H View Post
for 12v power supply, we need 4 5mm led's in series which can be connected without the resistor?
Hello, Using only 4 LED's in series will not going to give you good lifespan for your led's. 12 V power supply with 4 LED's in series will give each LED about 3~3.2 Volts but what about the current ?
Dude, Excessive Amps (Current) may shorten the life of LEDs. So Instead using 4 LED's in series use only 3 LED's with a Resistor to control the voltage as well as Current to get good lifespan of LED's.
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