This blog is as far as we ever went with this project. Cheap LEDs have color differences, and we couldn’t get it right.
August 20, 2009 @ 2:05pm – The LED arrangement is great for dark rooms, but we need much more light. This plan is going to be “canned” and another solution is going to be sought. I am going to check out the high-power LEDs at the Ebay and see what’s shakin’. It’ll be another 2 weeks before anything else arises.
August 19, 2009 - On August 19, 2009 @ 12:00pm, I received my 18,000mcd 5mm LEDs from China. Since I had to work and then go to church, I didn’t think I would have time to do anything with them. Now, it is August 20, 2009 @ 1:02am, and I know that I had some kind of time. So far I’ve figured that from start to finish it will take me 2.5 hours per light can to completely assemble from start to finish. I’ll try to break it down by the task.
10:30 – 11:00 — Solder 100ohm resistors to the LED anodes (25 total)
11:00 – 11:15 — Drill holes into 3″ PVC cap and ream to tight fit for LEDs
11:15 – 11:30 — Fit LEDs into holes and aligning them
11:30 - 1:00 — Solder anodes to anodes and cathodes to cathodes
I alternated the LED legs. It starts with anodes, then the next row has cathodes facing inward. The next row has cathodes in the middle. It’s hard to explain without a picture. I’ll make one in ascii…
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I’m showing Clint the light tomorrow along with some pizza to see if we both agree that it could be worthy (the lights, not the pizza). I played with it in the kitchen using my homemade power supply on the 5 volt side. Very useful tool that was documented here on Tech-Tut. Variable Power Supply using LM317 and 7805 ICs
The program to control the lights has started to be written by Clint. I’ve seen his development thus far, and it is going to be truly remarkable. We will get to test it our once I get my hands on an RS232 chip. This is going to be great. Yeah, I’m sure that there are programs out there that do this very thing, but sometimes D-I-Y (reinventing the wheel or whatever you wish to call it) is more fun than just buying something. Remember what Tech-Tut says, “It’s more than just a project!”