Quote:
Originally Posted by kacir
This is an absolutely magnificent idea!
This should be very easy to implement. A headphone jack has 3 contacts: left channel, right channel and the common ground. It should be very cheap engineering-wise and production-wise to implement an enhancement of audio circuit that would generate a signal for processor when there is short connection between left and right channel.
The price for unit would not go up (at least not significantly) and you would open a market opportunity for a remote switch. Plus any self respecting hobbyist hardware hacker would be able to fashion his own perfect switch. Plus Mentor or EZreader or whatever name you decide to use would be the first to have such feature.
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Or with a short between left and ground you could do forward and the right and ground could do back providing full reading capability. You would have to ensure that the audio output will not burn up if the output is shorted to ground of course but that protection may even already be there.
Dale