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**fayad555** · 03-01-2010, 07:47 PM

@pradyumna, hey welcome to xBhp...

I was having the same thing thing in mind, ie same set of LEDs glowing with low and high brightness for park and stop signal lights.

If we connect both park and stop lights into same leds, then while applying brake with park lamps ON, more current would pass through the leds and it may blow off. But we can design the circuit such that even at this extreme case the leds wont blow off but the brightness would be lower for both park and stop lights functioning independantly.
Also there would be 3 brightness levels.

So is there any way to overcome this problem?

**abhijeet080808** · 03-01-2010, 10:24 PM

Maybe its possible to do so with proper use of resistors. But, its easier to use two separate rows of LEDs.

**pradyumna** · 03-01-2010, 11:08 PM

Originally posted by fayad555 View Post

@pradyumna, hey welcome to xBhp...

I was having the same thing thing in mind, ie same set of LEDs glowing with low and high brightness for park and stop signal lights.

If we connect both park and stop lights into same leds, then while applying brake with park lamps ON, more current would pass through the leds and it may blow off. But we can design the circuit such that even at this extreme case the leds wont blow off but the brightness would be lower for both park and stop lights functioning independantly.
Also there would be 3 brightness levels.

So is there any way to overcome this problem?

first of all, i would like to thank you for welcoming me. Secondly, as abhi told already it can be controlled by using preferred value of resistance.

Originally posted by abhijeet080808 View Post

Maybe its possible to do so with proper use of resistors. But, its easier to use two separate rows of LEDs.

Yes, I agree with your point but, complicating it and achieving what i have stated will attract more eyes and less LED's can do the job. It will be as an OE product which works alike new model pulsars and apaches

**rahuldevnath** · 03-02-2010, 12:41 AM

Originally posted by fayad555 View Post

Are these smd leds available in the market??

Yes, easily.

Originally posted by abhijeet080808 View Post

What are their cost like? If the costs are similar, its is certainly better then normal LEDs.

@fayad555 - PCB is a must if you want an evenly spaced arrangement that looks professional.

Abhi, these LED are available as single units as well as LED strips, which is what we require for Indicators.

What we get is a strip with pre fetched resistor connected in series to 3 LEDs of about 3 inches. The strips can be bought like 1 Meter and then cut into 3-3 inches to suit our needs.

They are much brighter and more reliable as well. No PCB required, these strips have adhesive and are available in water-proof as well non-waterproof versions. So you can cut 3 X 3 inch strips (9 Leds) and paste it in 3 rows, and connected in parallel.

The cost is about 300 bucks for 1 meter strip (60 LEDs)

I think, I will do the change to my indicators in a day or two.

Checkout the pics.

**abhijeet080808** · 03-02-2010, 12:47 AM

Ok, thanks for the info. So its not too costly then. Great! Do make up your indicators. But the blinking rate may go up with the stock flasher. You may have to use a dummy resistor to slow it down.

**rahuldevnath** · 03-02-2010, 12:53 AM

Originally posted by abhijeet080808 View Post

Ok, thanks for the info. So its not too costly then. Great! Do make up your indicators. But the blinking rate may go up with the stock flasher. You may have to use a dummy resistor to slow it down.

Yes, the flashing rate will go up.. but I don't know what will be the effect this mod on BCU loaded Pulsars.. let's see

**fayad555** · 03-02-2010, 01:56 AM

Originally posted by pradyumna View Post

first of all, i would like to thank you for welcoming me. Secondly, as abhi told already it can be controlled by using preferred value of resistance.

Yes, I agree with your point but, complicating it and achieving what i have stated will attract more eyes and less LED's can do the job. It will be as an OE product which works alike new model pulsars and apaches

do u know the setup in RTR/Pulsar? Is it the same leds glowing with different brightness?

Originally posted by rahuldevnath View Post

Yes, easily.

Abhi, these LED are available as single units as well as LED strips, which is what we require for Indicators.

What we get is a strip with pre fetched resistor connected in series to 3 LEDs of about 3 inches. The strips can be bought like 1 Meter and then cut into 3-3 inches to suit our needs.

They are much brighter and more reliable as well. No PCB required, these strips have adhesive and are available in water-proof as well non-waterproof versions. So you can cut 3 X 3 inch strips (9 Leds) and paste it in 3 rows, and connected in parallel.

The cost is about 300 bucks for 1 meter strip (60 LEDs)

I think, I will do the change to my indicators in a day or two.

Checkout the pics.

but what if i want to use these leds in a different design(not like strip) in a pcb, can i solder them in a pcb?
Thanks for the info'

**rahuldevnath** · 03-02-2010, 09:21 AM

Originally posted by fayad555 View Post

do u know the setup in RTR/Pulsar? Is it the same leds glowing with different brightness?

but what if i want to use these leds in a different design(not like strip) in a pcb, can i solder them in a pcb?
Thanks for the info'

In Pulsars there are two different rows of LEDs for Braking and Normal Tail lights.

SMD are also available as single units or can be removed from these strips, which then can be soldered to a pcb.

What I found out that, the pre-fabricated Resistors, are very reliable.

**Shreeni0403** · 03-02-2010, 10:09 AM

Whether indicator will flash if we use LED's

This is bcz I tried putting a 10w bulb to save current (stock is 21w on Unicorn). Indicator didn't flash.

Tried LED, same thing happened. So how to put LED's so that it can consume 21w exactly !!!

**Puneet1** · 03-02-2010, 12:21 PM

Originally posted by Shreeni0403 View Post

Whether indicator will flash if we use LED's

This is bcz I tried putting a 10w bulb to save current (stock is 21w on Unicorn). Indicator didn't flash.

Tried LED, same thing happened. So how to put LED's so that it can consume 21w exactly !!!

21 w for 2 indicators

. the LEDs should have flashed ,though much faster rate .

**pradyumna** · 03-02-2010, 01:34 PM

Originally posted by fayad555 View Post

do u know the setup in RTR/Pulsar? Is it the same leds glowing with different brightness?

but what if i want to use these leds in a different design(not like strip) in a pcb, can i solder them in a pcb?
Thanks for the info'

I have not opened any tail lamp of latest pulsar/rtr, but i guess it works in that way

**pradyumna** · 03-02-2010, 01:37 PM

Originally posted by Shreeni0403 View Post

Whether indicator will flash if we use LED's

This is bcz I tried putting a 10w bulb to save current (stock is 21w on Unicorn). Indicator didn't flash.

Tried LED, same thing happened. So how to put LED's so that it can consume 21w exactly !!!

You must have used a capacitor in your circuit, so it was not blinking i guess

**sajjt** · 03-03-2010, 01:02 PM

Normal bike blinker relay is rated to 21W, try to find a lower rated blinker module to use with an LED circuit or its even better to design a special circuit for this. Hope Abhi can do this easily.

**fayad555** · 03-04-2010, 12:27 AM

Originally posted by sajjt View Post

Normal bike blinker relay is rated to 21W, try to find a lower rated blinker module to use with an LED circuit or its even better to design a special circuit for this. Hope Abhi can do this easily.

He has already given a method to slow down the blinking rate..

Originally posted by fayad555 View Post

abhijeet
to connect these leds to indicators do we need to change the values of resistors? have u tried it??

Originally posted by abhijeet080808 View Post

Yeah, you will need one in parallel to the LEDs. It will decrease the rate of blinking to acceptable level. Yeah, i have tried it. Were not too bright though. Could fix only abt 6 LEDs. You will need to fix atleast 20 LEDs for adequate brightness.

**Shreeni0403** · 03-04-2010, 05:53 PM

Let me clear it..!!

Bajaj's uses 21w flasher so front indicator 10w + rear 10w + console 1w = 21w

BUT

Honda uses 43w flasher, each bulb is 21w i.e front 21w, rear 21w and console 1w.

And someone said that i used capacitor, NO i didn't use any capacitor. Forget LED, why didn't it blink when I had put 10w bulb ??

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Retrofitted LEDs on tailight of my P150 Classic

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