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Author Message   Aphototaker Tinkerer Username: Aphototaker Post Number: 69 Registered: 12-2009 Rating: N/A Votes: 0 Posted on Wednesday, February 17, 2010 - 09:36 pm:    Reading this info about microcontrollers,since the input is an IR diode, I suppose it would be equally good reading the audio signal from the setup I described earlier, and calculating the duration of the open shutter (or high response time). This could be done using a program that reads the audio input port of the computer. If the audio card can sample at 96 KHz, assuming fast enough response time, it should function as good as a stand alone board. This would be beneficial if a computer is already handy and will incur minimal cost (just a diode, a resistor and a battery source). But requires programming skills on an OS. After having written this message, I think a near future project is already taking shape in my mind If I do this, it would be my first program using ALSA in Linux to record sound samples.