On Sat, Jul 05, 2014 at 10:17:21AM -0700, Len Ovens wrote: > I do want to try the rotary encoder though. either with a large > wheel (actually 2-3inch is not that big) or belt with no LED strip. > The on screen fader position should be good enough. In case you'd consider the motorised fader, there's an Arduino project using it: http://blog.codyhazelwood.me/motorized-faders-and-the-arduino/ There's one problem with this: the author has the H-bridge 'enable' pin hardwired. This means that the motor always sees a low-impedance voltage source. The voltage can be zero, but that will make the motor resist movement. When the fader is 'touched', the motor should be open-circuit, so the H-bridge should be disabled, this takes one more pin on the controller. You could actually control the 'resistance' of the fader by pulse-width modulating the enable pins of the bridge. To control many faders you'd need some external logic to multiplex the Arduino's logic pins, but otherwise everything is there. Ciao, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow) _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
