Thanks. I don't really care about having too many degrees of PWM. 0-255 is fine by me. Realistically 0-9 would do the job for the set brightnesses but would look crap for fading.
I've just installed the Android Arduino IDE. Maybe not a good idea, I'll never get anything done if I can work on projects with my phone. Uploaded the blink sketch to my Uno and it worked perfectly.
Learnt how to use interrupts tonight. Quite pleased with the progress, even though there's a lot still to do.
Floppy Organ stage 3: http://youtu.be/obYuROTBXu8
I've been trying to get my head round Eagle CAD (Jim lent me a copy of the pro version). Takes some getting used to, but a few youtube videos definitely helped.
I'm going to give the laser transfer/etching method a go once I've finished designing the board. The board's not very complicated, just a bunch of floppy drive sockets routed to a pin header to make my floppy organ (it's cold outside, John) a bit more organised and less prone to random braking.
I think if I design mine well and I don't just have the screw connectors down one side, instead having them spread across 2 or 3 sides I could probably get it down to 10cm x 10cm which is only $18.90 for 5. Assuming that leaves enough space for 20 to 24 transistors.
Nooo. Really no. Don't make me want to spend even more money designing my own PCBs as well. Yes, I'd love to. I've already spent too much. Lots of little spends adds up.