RGB LED Ring Assembly

This time I ordered the RGB LEDs from JELEDHK (ebay) and got a better deal. Unfortunately the semiconducter chips seem to be reversed, so the LED packages have to be rotated by 180° to make it work again. Now the silkscreen is incorrect. I'll have to make adaptions to the code as well.

This time in yellow. It seems the boards came out more like a yellowish orange, similar to what a real orange looks like. Definitely not citrus yellow.

Design files, code and documentation .

Design files, code and documentation .

After this step you can put back the three jumpers to the ISP_E header and, most likely, you'll never have to touch them again. In case you forget them, 3 of the RGB LEDs will stay dark.

The green LEDs are remarkably efficient. Or the emitted wavelength is spot on the maximum spectral response of the human eye. That should be about 530nm, pretty close to 532nm which happens to be the emitted wavelength of a frequency doubled Nd:YAG laser. Compared to the LEDs I used before, these green ones are almost too bright. I had to up the resistor from about 100Ω to 390Ω to get an acceptable color balance. I'd love to see such a boost in brightness in the remaining two colors as well.

Illustration for the "manual" Make sure to view full size (550x665), as flickr's rendering of resized PNG images is terrible.

TS 2940 CW-5.0

16V DC absolute maximum. Never apply more than 14V DC (regulated).

For BLUE.

For RED.

For GREEN.

Needs to be cut to size.

Needs to be cut to size.

Needs to be cut to size.