Hello, I have a Labjack U3 that i want to use for selecting from one of four (or more) loudspeakers, playing a simple audio tone and getting a response from a listener via a button push (as to the location of the audio source). I have been able to program the labjack using (eDI) to detect a specific button push without any problem. However, I cannot get any audio signal output to a loudspeaker after opening a digital port (using eDO) connected to that loudspeaker. I think the problem is a simple one, however, I am not an electrical person. I would appreciate any help you can give.
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A couple initial things:
1. What sort of signal causes the speaker to make noise? If you have a "buzzer", they buzz in response to a DC voltage, so this might be what you want. If you have a plain speaker, it needs an AC waveform to create a noise at that same frequency.
2. How much current does the speaker need to make noise? See note #16:
https://labjack.com/support/datasheets/u3/appendix-a