rederikus wrote: > I have three PiCorePlayers, two Logitech Boom players and two Logitech > Radios all working from a Squeezeplug running on a Raspberry Pi B. One > of the PiCorePlayers is connected to a 2 x 300Watt (RMS into 8 Ohms) > amplifier that runs my single zone whole house sound system. This whole > system is in the (well ventilated) top of a closet. > > I switch it on and off via the Android Squeezebox app. I built a little > bit of electronics that senses sound coming out of the Pi + Behringer > UCA-222 USB interface. Once it senses a signal, it operates a mains > relay that turns on the amp. It stays on until about 2 minutes after > the signal stops. > > So far it has been very reliable. However it would be very nice if a > Raspberry PI GPIO pin could change state when the PiCorePlayer (the Pi > is always powered on and ready) is switched on via the Android app. > This is analogous to powering on a Boom via the same app and seeing the > screen light up. > > If I could use this positive On/Off signal to activate my relay then I > could dispense with my signal sensor. Why? Mrs. rederikus sometimes > turns the things down so low that if it is activated later with a quiet > piece of music then, sometimes it does not activate. Mrs. rederikus > then complains to me that it does not work. OK, I could always play > only very loud music but, I like Pink Floyd a lot and some bits are just > quiet. > > If anybody knows of a GPIO pin that toggles when PiCorePlayer is > activated (not powered up) I would be most grateful. > > Thanks in advance.
Hi rederikus, This is close to what you want. regards Greg Greg Erskine wrote: > hi palmerx, > > I don't want to discuss this topic here because it doesn't fit with > piCorePlayer as a software only solution. As soon as we add DIY hardware > we risk damage to your Raspberry Pi and in this case we "may" be > switching main voltage, so personal injury can be a possibility if you > don't have the qualifications. Some amps may have the control relay > built-in so we are only switching low voltage which is obviously not too > dangerous. There are too many options to support. > > I know the guys at Pink Fish Media are hard core DIYers, with a lot of > experience in hardware and software design and implementation, so they > know the risks involved. So you may want to follow this thread and see > where it leads. > > http://www.pinkfishmedia.net/forum/showthread.php?t=165465 > > regards > Greg ------------------------------------------------------------------------ Greg Erskine's Profile: http://forums.slimdevices.com/member.php?userid=7403 View this thread: http://forums.slimdevices.com/showthread.php?t=97803 _______________________________________________ unix mailing list unix@lists.slimdevices.com http://lists.slimdevices.com/mailman/listinfo/unix
