Can I pick your brains? How would you solve this puzzle....

[HankMcSpank]

Er, surely for 12 individual LEDs you need 13 wires? Or are you multiplexing them? Wiring the LEDs in a 3x4 array gets the wire count down to 7. Five wires is possible, depends what you are controlling them with? You can get some very very thin wire, can't remember the name of it at the moment. I've got plenty of 8 core 'alarm cable' if that's any use to you...

there are actually 10 frets with 'fret markers' along the neck (some guitars only have 9 frets with markers), but two of the frets along the neck actually have two fret markers (which would be 2 leds that light up together, so only one 'feed' wire shared between them), so it's actually 10 fret positions, plus a return wire.

here's what I'm on about...

http://2.bp.blogspot.com/_qnQwfZmjA0...0/09-7-3-1.JPG

re the alarm cable...thanks but I've cable aplenty this end!