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-   -   Benny's first DIY : LEDs on an Ikon (https://www.team-bhp.com/forum/diy-do-yourself/50723-bennys-first-diy-leds-ikon-10.html)

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 :p

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?

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.

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

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

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

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)

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.

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 clap:. (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

I hope you meant series
As I said earlier, 470 Ohm should be enough,

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

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.

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

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.

I believe Greenhorn has already converted his number plate setup to LEDs. The same should be found on this thread.

PLs. read Dashboard instead of bonet above. :)

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..

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.