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LED questions
ivwshane:
I have a bunch of LED's that I got from an old iphone display and I'm planning on using them to make a marquee light but I have a couple of questions on a couple of things.
First, the LED's seem to have a narrow beam of light, is there a way to widen the beam?
Second, I have two strands of LED's, roughly 16-18 LED's per strand all ran in parallel how do I connect these to a computer power supply?
Currently I can run both strands of LED's off of 3 D cell batteries with no problems.
Would it be just a matter of hooking it up to the red and black wires on a molex connector?
arzoo:
If you file the tops of the LEDs flat, you may get better diffusion. It might help if you posted some pics.
fatfingers:
You will likely need a resistor or the LEDs will fry from the 5v.
Twinpanther:
Depending on the color of the LED's (Red, Orange, Yellow, Green run about 2.1v while True Green, Blue, White and UV run about 3.4v) you most likely would need a resistor on the negative LED post. They'll light up without it but most like will burn out much sooner than you'd like. No expert here by any means but just info I picked up DiYing my own for my reef aquariums.
fatfingers:
--- Quote from: Twinpanther on October 13, 2008, 09:20:47 am ---Depending on the color of the LED's (Red, Orange, Yellow, Green run about 2.1v while True Green, Blue, White and UV run about 3.4v) you most likely would need a resistor on the negative LED post. They'll light up without it but most like will burn out much sooner than you'd like. No expert here by any means but just info I picked up DiYing my own for my reef aquariums.
--- End quote ---
Sounds right.
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