Made with KiCad

How nice! I don't even have to open the envelope myself. That's what I call SERVICE.

Now I need to get hold of the Nichia LEDs! 20 lumen per piece and more than 100lm/W.

It must have been a huge brain-fart that made me believe I would have to trash these boards, only because of a wrong ISP header pinout. Or maybe it was too early in the morning already. Adapters are soooo nice ;-) It turns out that I wouldn't have had to pull all the chips off the pcb. The ATtiny2313 has 1k resistors on ALL I/O lines, so it survives shorted pins. Only the LED driver got fried, as it lives on the SPI lines as well, but without those resistors... Now I only must remember to always use that cable.

I wonder why the green LED is so dim.

The back-illumination is provided by the LEDs themselves. The board was leaning against a flat surface.

Compared to the LEDs I used for the previous version (ebay, 80mA per channel), this one uses high efficient (and quite costly) ones by Nichia. 20lm per piece at just 50mA. These are sold as 'white' and are considerably warmer than the ebay ones.

I spend more time cleaning the flux residue away than with soldering. I need to get solder with a nicer to clean flux core. This stuff is terrible to clean. It doesn't become hard and brittle, but stays somewhat sticky. Almost like dried coke in a laptop. ARGH.

The top LEDs take about 85mA per piece/channel, the bottom ones only about 55mA.

The top LEDs take about 85mA per piece/channel, the bottom ones only about 55mA.

The top LEDs take about 85mA per piece/channel, the bottom ones only about 55mA.

It's interesting how the PCB looks purple on the left side and blue on the right side.

Postscript printing is not encouraged, use 'plot' instead. Build: (2011-07-08)-stable, running on linux.

Maybe useful as well. Maybe...

Maybe useful as well. Maybe...