Feb 24, 2012 #1 S shivaece Member level 1 Joined Jul 7, 2010 Messages 34 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Location Madurai Activity points 1,480 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
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
Feb 24, 2012 #2 FoxyRick Advanced Member level 4 Joined Jan 8, 2004 Messages 1,249 Helped 321 Reputation 640 Reaction score 277 Trophy points 1,373 Location England, UK Activity points 12,979 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
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
Feb 25, 2012 #3 andre_luis Super Moderator Staff member Joined Nov 7, 2006 Messages 9,632 Helped 1,190 Reputation 2,399 Reaction score 1,216 Trophy points 1,403 Location Brazil Activity points 55,852 shivaece said: ...the circle diameter should be about 5 cm... Click to expand... You need provide more detailed informations. For instance, LED apperture angle, and target distance is determinat to draw device array inclination. +++
shivaece said: ...the circle diameter should be about 5 cm... Click to expand... You need provide more detailed informations. For instance, LED apperture angle, and target distance is determinat to draw device array inclination. +++
Feb 27, 2012 #4 S shivaece Member level 1 Joined Jul 7, 2010 Messages 34 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Location Madurai Activity points 1,480 I am using 8mm white LED which has max current of 30mA,viewing angle is 30 degree,max voltage is 4V
Feb 27, 2012 #5 FoxyRick Advanced Member level 4 Joined Jan 8, 2004 Messages 1,249 Helped 321 Reputation 640 Reaction score 277 Trophy points 1,373 Location England, UK Activity points 12,979 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
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
Feb 27, 2012 #6 S shivaece Member level 1 Joined Jul 7, 2010 Messages 34 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Location Madurai Activity points 1,480 Ya got it right... thanku so much