Go Back   Team-BHP > Under the Hood > Technical Stuff > DIY - Do it yourself


Reply
 
Thread Tools Search this Thread
Old 9th May 2009, 22:03   #136
Senior - BHPian
 
greenhorn's Avatar
 
Join Date: Apr 2007
Location: TN-14
Posts: 6,838
Thanked: 1,316 Times
Default

now that I've opened up the entire unit, The PCB and the space inside is pretty mod friendly, and looks like I'll have acess to an always on 12V supply ( used to run the two bulbs on the side), So I'm thinking of a full PWM setup (using a simple RC circuit to create the up/down ramp for turn on/off, another 555 + RC circuit to make the modulating triangular wave, and a comparator to make the PWM waveform by comparing the turn on ramp with the modulating trinagular wave ( a simpler version of http://ourworld.compuserve.com/homep....htm#eyes2.gif )

a more bling and easier to make alternative is to have 4 rows of LED's light up and turn off in sequence. using a single RC circuit, and 4 comparators which will turn on each row as the capacitor gets charged up . The more i think of it , the more I like it

Last edited by greenhorn : 9th May 2009 at 22:07.
greenhorn is online now   Reply With Quote
Old 9th May 2009, 22:08   #137
Team-BHP Support
 
benbsb29's Avatar
 
Join Date: Nov 2006
Location: Brisbane
Posts: 8,022
Thanked: 3,478 Times
Default

Quote:
Originally Posted by greenhorn View Post
a more bling and easier to make alternative is to have 4 rows of LED's light up and turn off in sequence. using a single RC circuit, and 4 comparators which will turn on each row as the capacitor gets charged up Let me see
This sounds like fun. Have you thought about the capacitor ratings you would use on each row? Or do you plan on using different resistor ratings on each row?
benbsb29 is online now   Reply With Quote
Old 10th May 2009, 01:02   #138
BHPian
 
ghpk's Avatar
 
Join Date: Mar 2009
Location: Ghaziabad
Posts: 869
Thanked: 192 Times
Default

Dimming effect can be integrated using a Light Dimmer circuit based on power transistor, 2n3055 types, it would need a heat sink so actual dimmer location would not be the Dome Light assembly.

If anyone needs circuit diagram of that dimmer, let me know.

the 4 Row L.E.D. thought of greenhorn is Amazing.

Has any of my L.E.D. Pal come across with RGB LED, Iam looking for the 4 LEGS one, which has one common (anode or cathode ) and three for RGB's
If someone has info on it, it would be of great help, the only option i have for it is "Pirhana" LED and its bit costly when going in for RGB.
ghpk is offline   Reply With Quote
Old 10th May 2009, 02:31   #139
Senior - BHPian
 
greenhorn's Avatar
 
Join Date: Apr 2007
Location: TN-14
Posts: 6,838
Thanked: 1,316 Times
Default

Quote:
Originally Posted by benbsb29 View Post
This sounds like fun. Have you thought about the capacitor ratings you would use on each row? Or do you plan on using different resistor ratings on each row?
the latter. will be using a potential divider with values so as to give a 1 second interval between rows. need to get the timing right, else would have used an LM 3914

Quote:
Originally Posted by ghpk View Post
Dimming effect can be integrated using a Light Dimmer circuit based on power transistor, 2n3055 types, it would need a heat sink so actual dimmer location would not be the Dome Light assembly.

If anyone needs circuit diagram of that dimmer, let me know.

the 4 Row L.E.D. thought of greenhorn is Amazing.

Has any of my L.E.D. Pal come across with RGB LED, Iam looking for the 4 LEGS one, which has one common (anode or cathode ) and three for RGB's
If someone has info on it, it would be of great help, the only option i have for it is "Pirhana" LED and its bit costly when going in for RGB.
gphk, do post the circuit. most of what I read says LED's can be faded in/out using only PWM, and voltage/current variation isnt enough
greenhorn is online now   Reply With Quote
Old 10th May 2009, 03:05   #140
BHPian
 
ghpk's Avatar
 
Join Date: Mar 2009
Location: Ghaziabad
Posts: 869
Thanked: 192 Times
Default

check these out, quite easily reachable.

Dome light dimmer
dome light dimmer for cars circuit diagram

Dome light dimmer (with delay)
CircuitDB | Dome light dimmer (with delay)

and Light Dimmer Electronic Circuits, page 3

and many more at
Dimmers Circuits - Light Dimmer - Electronic Circuits
ghpk is offline   Reply With Quote
Old 10th May 2009, 03:14   #141
Senior - BHPian
 
greenhorn's Avatar
 
Join Date: Apr 2007
Location: TN-14
Posts: 6,838
Thanked: 1,316 Times
Default

had seen most of them, but my doubt is , will fading LED's work without PWM ?

the first circuit will not fade in (though it claims it will , but there is a resistor missing in the capacitor's charging path)

Last edited by greenhorn : 10th May 2009 at 03:16.
greenhorn is online now   Reply With Quote
Old 10th May 2009, 03:19   #142
BHPian
 
ghpk's Avatar
 
Join Date: Mar 2009
Location: Ghaziabad
Posts: 869
Thanked: 192 Times
Default

the article states it would fade out, but no mention of fade IN though.

will try this one tomm. itself as i've all the parts already with me for this one.
ghpk is offline   Reply With Quote
Old 11th May 2009, 01:07   #143
BHPian
 
rahulya007's Avatar
 
Join Date: Jul 2006
Location: Thane, Mumbai
Posts: 109
Thanked: 28 Times
Default LED cabon lamps

Greenhorn,

Its a nice learning game that we are playing..you are educating me on something and I doing the same...

As per the ratings you had said I got the 5 mm LED's and the 100 ohms 1/4 watt resistor and put 3 LED's together with 1 resistor in parallel..

This way I completed the DIY of LED lamps for the front reading lamps in my Indigo..although I had to spare more than half of my day doing the job..since 1 3 LED setup on which i spent the maximum time, went bust after sometime, post instalation. luckily i had got 10 LED's and so wasn't required to run to the market to get another set.

This ime around i tried to insulate the LED legs with ABRO tape (white paper tape mostly used by carpenters and even painters) and also coupled the 3 LED's tigether with the same tape. It was very easy job since I completed another 3 LED setup in almost an hour. after sufficient testing, went to the parking to do the installation. It was a successful install . (Posted the pics below). Then i immediately thot of the second lamp (passenger reading lamp) and came home and completed the setup in another hour. Had dinner and did the installation of the roof lamp. After many days I will be having a satisfying sleep as all these days after the DIY cabin lamp worm had entered my head, i was not able to sit quite..

I am planning to do the same for the reasr sit cabin lamps in the coming after i get the LED's as I am out of stock. Next would be the boot lamp.

Greenhorn,

I hope you have

Can you tell what type of resistor is required to use a 10 mm single LED since I am thinking of using the already biught 10 mm LED's for the boot lamp.

The light in the cabin is concentrated where the LEd's point to..Any idea what would be the solution so that LED's emit proper light.

Regards,

Rahul
Attached Thumbnails
Benny's first DIY : LEDs on an Ikon-dsc00273.jpg  

Benny's first DIY : LEDs on an Ikon-dsc00274.jpg  

rahulya007 is offline   Reply With Quote
Old 11th May 2009, 07:17   #144
Senior - BHPian
 
greenhorn's Avatar
 
Join Date: Apr 2007
Location: TN-14
Posts: 6,838
Thanked: 1,316 Times
Default

Quote:
I got the 5 mm LED's and the 100 ohms 1/4 watt resistor and put 3 LED's together with 1 resistor in parallel..
I hope you meant series
Quote:
Can you tell what type of resistor is required to use a 10 mm single LED
As I said earlier, 470 Ohm should be enough,

Quote:
The light in the cabin is concentrated where the LEd's point to..Any idea what would be the solution so that LED's emit proper light.
thats the way these two lamps are supposed to work. note the two lenses to focus the light straight downward. If you want diffuse light , put the LED's in the central area. You can use a pair of wires from one of these lamps.

If you know how to solder/how to figure out the circuit , you can probably find out which of the three wires is the one which is connected to the doors, and hook up the LED's directly to it , bypassing the switch

Last edited by greenhorn : 11th May 2009 at 07:20.
greenhorn is online now   Reply With Quote
Old 11th May 2009, 10:32   #145
BHPian
 
rahulya007's Avatar
 
Join Date: Jul 2006
Location: Thane, Mumbai
Posts: 109
Thanked: 28 Times
Default Fading IN/OUT

Greenhorn,

Last time when I had blown the fuse of the cabin lamps, I happened to read the fuse box cover sticker on the inside, which shows the position of the fuses.

In that one fuse read, 'Cabin Lamp Dimmer' (The actual text may be different, but it was related to dimmer function). Don't know what it was, may be you can find out more...

Regards,

Rahul.
rahulya007 is offline   Reply With Quote
Old 11th May 2009, 11:25   #146
BHPian
 
rahulya007's Avatar
 
Join Date: Jul 2006
Location: Thane, Mumbai
Posts: 109
Thanked: 28 Times
Default Indigo Number plat light LED setup

Hi,

Has any body done an LED setup for the Indigo rear number plate lights. Probably greenhorn can answer this since he is also having the same make I guess.

Regards,

Rahul
rahulya007 is offline   Reply With Quote
Old 11th May 2009, 13:37   #147
BHPian
 
rahulya007's Avatar
 
Join Date: Jul 2006
Location: Thane, Mumbai
Posts: 109
Thanked: 28 Times
Default

Hi,

Yesterday evening after completing the cabin lamp setup, I tried removing the number plate lights, but it seems there 's no direct option to remove them. Can any indigo owner suggest a way out.

I am also thinking of getting blue LED's and fixing it under the bonet in the driver and passenger area such that the leg room in the front is lit up. I am thinking og attaching the circuit to the odometer lamps such that when the lamps start the blue LED would start up.

Regards,

Rahul.
rahulya007 is offline   Reply With Quote
Old 11th May 2009, 13:45   #148
Team-BHP Support
 
benbsb29's Avatar
 
Join Date: Nov 2006
Location: Brisbane
Posts: 8,022
Thanked: 3,478 Times
Default

I believe Greenhorn has already converted his number plate setup to LEDs. The same should be found on this thread.
benbsb29 is online now   Reply With Quote
Old 11th May 2009, 15:16   #149
BHPian
 
rahulya007's Avatar
 
Join Date: Jul 2006
Location: Thane, Mumbai
Posts: 109
Thanked: 28 Times
Default

Quote:
Originally Posted by rahulya007 View Post
Hi,

Yesterday evening after completing the cabin lamp setup, I tried removing the number plate lights, but it seems there 's no direct option to remove them. Can any indigo owner suggest a way out.

I am also thinking of getting blue LED's and fixing it under the bonet in the driver and passenger area such that the leg room in the front is lit up. I am thinking of attaching the circuit to the odometer lamps such that when the lamps start the blue LED would start up.

Regards,

Rahul.
PLs. read Dashboard instead of bonet above.
rahulya007 is offline   Reply With Quote
Old 11th May 2009, 15:24   #150
BHPian
 
rahulya007's Avatar
 
Join Date: Jul 2006
Location: Thane, Mumbai
Posts: 109
Thanked: 28 Times
Default

Quote:
Originally Posted by greenhorn View Post
I hope you meant series
Connecting the 3 +ve terminals and the 3 -ve terminals together and then connecting the resistor to the terminal is a parallel circuit..right..or am I wrong..

I tried connecting the LED's in series ( +ve to -ve for the LED's in between and then the end terminals to the power source) but they would not lit up...This I understand is a series circuit..again correct me..

What can be the reason of the LED's not lighting up was I wrong with the terminal connections..

Quote:
Originally Posted by greenhorn View Post
As I said earlier, 470 Ohm should be enough,
I am planning to add 3/4 10mm LED's with 1 470 Ohm Resistor as you have mentioned above..will this be enough..


Regards,

Rahul.
rahulya007 is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Honda Activa DIY: Headlight upgrade and LEDs for indicators + tail lamps a4anurag Motorbikes 12 21st January 2017 22:50
DIY: Using leftover DRL LEDs for Home Lighting! Grr7 DIY - Do it yourself 12 17th June 2015 14:26
Skoda Octavia Angel Eyes and LEDs abhinav.gupta88 Modifications & Accessories 80 20th October 2014 16:09
Experiment! Replacing conventional headlights bulbs with LEDS! frankmehta Modifications & Accessories 18 8th December 2010 14:56
Quality Super Bright LEDs, where can I find them ? s0uljah Modifications & Accessories 20 20th February 2009 17:20


All times are GMT +5.5. The time now is 00:51.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks