Lie Ryan wrote: > On Fri, 23 Jan 2009 18:56:38 +1100, Astan Chee wrote: > >> Diez B. Roggisch wrote: >>>> >>>> >>> If all you need is on-off - why can't you just use a switch? >>> >>> >>> >> Because I want to control the on-off the device using a computer and >> write software for it (which I am confident I can do if I had references >> to how the wrappers to said interface). Cheers >> Astan. >> > > How about (a crazy idea) using the audio jack out? (DISCLAIMER: Little > Hardware Experience). High pitched sound (or anything in sound-ology that > means high voltage) means the device is on and low pitched sound off. The > device will need an additional transistor to separate low voltage from > the high voltage. I don't know how much power can be pulled from jack > out, but for a home brewn device it is still feasible to draw power from > USB and signal from jack out. > Congratulations. You just invented the modem.
regards Steve -- Steve Holden +1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
