I’m working on some new stage lights for my high school. The budget for this project is ~$300.
So far I have planned this:
10W RGB LEDs (350mA/10V per color channel) x8 - http://www.dealextreme.com/p/10w-500-lumen-multi-color-rgb-led-emitter-metal-plate-60-70-degree-44042
120W Computer Powersupply at 24V for powering LED drivers http://www.dealextreme.com/p/120w-universal-laptop-power-supply-15v-24v-dc-output-100-240v-ac-15647
Arduino PWM outputs for control - the 6 outputs will be mapped to R/G/B for stage left and stage right to allow for advanced color mixing.
Buck Constant Current 1A with PWM Controller - http://www.newark.com/national-semiconductor/lm3401mm-nopb/ic-pfet-controller-buck-msop-8/dp/54M4678 - 6 of these - 1 per PWM channel
Run 4 light channels from each driver in 2 series 2 parallel. (for 20V/700ma)
Questions I still have:
How to solder that chip? It’s 3x3mm and I have no idea how to solder up 8 wires to it. Maybe there is a chip socket for that shape of chip (hopefully)
Housing/Reflectors for the LEDs. I can see a couple other LEDs of the exact same dimensions but different colors/intensities so I have a feeling that is a standard LED form factor. Anyone know of housing for it? Looking for roughly a 12-15 degree beam angle.
Is it a bad idea to run multiple strings of LEDs in parallel? Will this cause a load imbalance?
Finally, if you see another problem with something in my plan please don’t hesitate to help! Thank you in advance.