I can make a LED lamp for our bikez... Need Help.

[gohilurvish]

Hi all...

The light is a necessary thng for evening or night riders.
I dnt thnk thr r some good stores who sell lights for bicycle.

if thr r any, they wud b needing dynamo.

One I m thnking to make is WHITE LED LIGHT. Circut diagram is ready with me. (nt just + and - conection but with some power saving option.)

Need is

1. 15-24 white LEDs. (easily available n cost max 1.50 - 2.00 Rs/LED)
2. 4 AA size rechargable cells. (more mAH is better)
3. Some help from u guys for mounting. (So it can b detached easily, coz we cant leave it on bikez)

Waiting for responce. Will make one for my bike when it'll arrive nxt week.

[abhi]

Good initiative man. Let me know if you want to sit sometime to figure out the best way.

But don't use the normal LEDs use the high intensity ones, costs about Rs.6 I think. Its not very expensive, so should not be a problem.

[deepak_majipatil]

U can use 555 Timer IC to Blink ur Light.Its saves a lot of Energy.
15 - 24 LEDS will eat away ur Battery energy.USE a more mAH.
Try using a better Wattage single LED.

U can as well get a better Lighting by having bigger battery under Ur seat & the wiring done from that to the Back & front Light

And if the cost go beyond 300Rs , there is already a LED light available with rohan(BOTS) for usage.

[jalilg]

What would be the cost of the led light??

[deepak_majipatil]

Rs.650/- very compact & can be carried in pocket

[gohilurvish]

thnkx deep3d...
m gonna use 555 timer only. with a pot so intensity can b varied depending upon time.

Cost.....!!!!!!??????
============
the module withour power source wud b costing somewhere 220-250 with some 16-20 LEDs.

Power source...
============
I thnk 2300mAh AA size (pencil) cell wud do gr8 job.

Nt sure abt run/charge but it wud b around 4-6 hours depending upon intensity u select.
The cells being chargable, nt a problem. But 2 cells of 2300mAh wud be costing some 300 bugs.

U can also use regular AA size cell. That wud work for some 6-8 hours in power saving mode.

(All the figures are calculated keeping all things in mind nt practically tested.)

[abhi]

These are how the two lamps look.


Since you asked for mounting system that comes on LED lamps, here they are. May not be easy to recreate locally. if you make one, we can make a mounting using Velcro strips also.

Mounting system.
The lamp by itself can be attached to the lamp mounting points which come on the cycles.


This is how it sits on the Concorde without making use of the snap on attachment that can be used with the tubes.


Else, the mounting system that comes along with the lamp can be used. This can fixed either vertically or horizontally, which would help depending on whether you are fixing it on the seat post, handlebar or the down tube.


Different ways to make it work. One with a circuit and one without.
Circuit inside the colorless lamp, with a small resistor.


The even more simpler light system, which just has the LED and no circuit.

[gohilurvish]

gr8 snaps abhi...
i thnk this kinda mounting is diff to make.

i thnk the right 1 in 2nd snap is good to mount wch dosent need nethg on bike side.it can b just pulled after use. Simple push-pull mechanizm.

one without circut will consume more power.
Here only 1 LED is used as its of high power n luminance and it also has proper designed glass on it. (its necessary in rainy conditions) nehow open circuit will also work in rain n wont creat ne prob.

[rohan_kini]

had tried this some time back - http://rohan-kini.livejournal.com/54155.html

some points
- just a few high intensity L.E.Ds are sufficient
- the circuit has to be small and should be well protected. Ours was kinda open and I used to just hang it on my backpack while biking back home.
- flashing circuit is definitely good. (would be nice to have different modes)

would be really nice if you could do this. We could keep your stuff at our store and you can price it as you want would be nice to support local entrepreneurship !
And like you mentioned this is a very necessary item.

What sez ?

[gohilurvish]

seen the link,
That was a gr8 job. (if u r nt an Electronics Engg.)

Nt blowing trumpet but wht i'll make wud be better thn this.
(have hands on this kinda stuff since long back.)

Making it blink is easy but keeping different modes will double its cost.

White LEDs wud the Best.
I came to b'lore just 2-3 months back so purchasing of components and soldering iron is not done yet.
Want to get it ASAP to star this work.

I dont want to earn from this so it'll be like help only.

If you can get some casing to keep then tell me so that i can modify the design to fit it into that.

It'll be gr8 to have that coz in Rainy season its necessary.
And a glass cover will spread the light wch is better then open LEDs.

Thanks 4 the support Rohan...
U gave me a gr8 boost...

[rohan_kini]

Yup not an electronics engineer

Your welcome dude. It would be really awesome if you can get this into "production mode" more from the point of just trying it rather than making money out of it. The very process of taking an idea and pushing it is a great experience.

So dont think of just making money out of this. Imagine far beyond that. Lots of Bangaloreans riding out in the nite with your product sitting on their cycles. We really dont have anything like this out there ! Just imagine Now this is what is powerful.

Casing. Im sure there are ways in which we can get this done. Anyone else here has any ideas how we can do this ?

The different modes (blinking) would definitely be useful even at the extra cost.

If you need any kind of assistance Id be glad to help you. Bicyclists here need this and If someone can spearhead this I would be more than happy to help out

[gohilurvish]

Hey just thought of side light (blinking 1...)

There wont be much cost increment for that....

Making money out of that???? Never.... (it wnt be anything compare to salary.. )

Tell me,
If a blinking is ther for side light, wud it be permanetly fixed or just detachable??

M thnking of a regular detachable for my 1st try.
Will take feed back and then will procceed with next version...

Rohan, Can you please arrange the casing???

M gonna buy the components this weekend... Will be finishing by next week....

[pkota]

Doesn't any bikes indicator become a good casing? We just have to find the one of the right size. Those thing s come with a built in reflector too...

[rohan_kini]

Casing would have to be made specifically depending on how you design the whole circuit.

Not too sure where n how. Will try n fish for more info

[madhupn]

Hey guys, a quick question.

In Bangalore, is there any prohibition (by Rule) in using a flashing red light on the cycle? I got a light set which has a red LED light with 3 modes - Flashing - Running and Steady. Yesterday while going home i used it for the first time on road and put it in flashing mode.

While going through ORR, before tamarind junction, had one of those "Cheetah" patrol following me closely and checking out the light. He didn't stop me or ask me about the light. I am not sure if he was just curious to know what it is or if there is prohibition in using it. So, I just wanted to know if there is any issue in using the light.

Thanks and regards,

[abhi]

Don't worry about that, its not a problem. I'm sure he was just curious... About the lights: How much and where?

[gohilurvish]

Guys, i promised to make a LED lamp but i couldnt.
Really sorry for that.
I was outside India and couldnt carry the task.
Will be out for more 2 weeks.
Trying to spare time to get started.
Circuit is ready. If any1 wants i can mail the circuit.

[madhupn]

Hey Abhi, I got it from R. R. cycles in Ulsoor. Rs 440/- for LED Head light and rear light. Both lights are detachable and light weight. Headlight has two modes - Blinking - Steady and rear light has three modes - Flashing - Running and Steady. Though I am not sure if its costly according to market price, but got it anyways as I felt it’s a necessary accessory. Can post picture if needed.

[abhi]

Thats not a really bad deal actually. How bright are the LEDs and post up snaps it would be great to see it in action!

[pranavnegandhi]

I'm bringing up an old topic because I thought some of you might be able to help me with my DIY light project.

I've finished all the casing and circuitry stuff on the light. I needed some advice on attaching the battery to the cycle. Under the seat is a fine spot, but I also need to keep it dry - from rain drops as well as condensation.

Does anybody have any suggestions?

.p

[abhi]

Just thinking on the fly here you have two options:
1. Shrink wrap the whole thing.
2. Use a container, like the Nivia creme-flat-round-coin shaped box and punch out holes for the leds to peep out.
Post up some images of the stuff that you have made too, lets see how it looks

[yatin]

One can visit this site

http://www.freelights.co.uk

I felt this is more environmentally freindly... no hasssels for charging/replacing the batteries.

Cheapest model(D.I.Y.) available is costing 12 GBP. I feel if indigenised the same will come at cheaper rate.

Cheers

[girish]

Hi,

I may be too late to suggest anything in this post. Did you heard of power LED's ?? Though costlier (~125/led), it is good enough to light a small room/hall. With reflector, I am sure, it will act as a nice light for bicycle. The power supply will be a problem as it uses 3.4V source and hey, the batteries of most of the mobiles do actually give that voltage right ?


You can check out the link to a company which sells them at
http://www.kwalityindia.com/white%20LEDs.htm

It is in hyderabad. I used one of the power LED's for some other project though

Girish