LED array for my camera

[shivaece]

Hi i need to use a circular array of LED around my webcamera for focussing purpose.

the circle diameter should be about 5 cm.

please suggest me the best way to do it...i will be using white LED's ...

need ur reply fast

 

[FoxyRick]

Do you just need to increase the light?

If that's all you need, then please look at my posts in this thread about driving white LED's from 5V - it shows how to wire them up.

https://www.edaboard.com/threads/242044/#post1035485

 

[andre_luis]

...the circle diameter should be about 5 cm...

You need provide more detailed informations.
For instance, LED apperture angle, and target distance is determinat to draw device array inclination.


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[shivaece]

I am using 8mm white LED which has max current of 30mA,viewing angle is 30 degree,max voltage is 4V

 

[FoxyRick]

How many? Anyway, to power them, wire them up like this. You can add more LED/resistors between the lines.

You will need to change the resistors though. I'll give you some values for typical power supply voltages:

For 5V PSU, use 33 ohm resistors
For 6V PSU, use 68 ohm resistors
For 9V PSU, use 180 ohm resistors
For 12V PSU, use 270 ohm resistors

 

[shivaece]

Ya got it right...
thanku so much