The light of the leds were so strong that even when you hoovered with your hands from about 30 to 40 cm it would still detect your fingers. Meaning I had a hoovering multi-touch table, not quiet what I wanted. So I tried putting the adapter from 12V to 9V but that didn't make a very big difference.
After playing with it some more I came to the conclusion that the light could break free from small gaps between the acrylic and the aliminium, so now I have to buy some duct type to fill the gaps and hopefully it will work.
In the meantime I had to go to school to return the beamer and I have to come up with a structure for my research subject.
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Hoi Marc,
I have also bought LEDs from leds-buy, but mine do not seem to be so powerful. What kind of resistors did you use?
Alvast bedankt, Hugo.
I used this schedule:
http://img299.imageshack.us/img299/7210/led1ra8.png
So resistors of 68 ohms.
Good luck
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