Grumpy_Mike:
amundsen:
By the way, I was thinking about heterodyning too but actually is it something different from amplitude modulation ?Yes it is frequency shifting not a form of modulation at all.
I thought it could be considered as a kind of intermodulation (the same way ring modulation is, this one also being based on a multiplication).
Grumpy_Mike:
amundsen:
It might be easier but the continuous nature of an audio input sampled by a steady and high-sampling rate clock makes it much more reliable for sensors IMHO.I don't think you are right. What sort of sensors are these?
These are rather simple sensors (flex, pressure, soft pot) but the question is more about the type of connection between the sensors and the computer than about the sensors themselves. My experience with an interface transmitting sensor data through an audio interface as done by this device has been much better than with any other interface dedicated to sensors and using USB, serial or Ethernet in terms of stability and sampling rate (without making the fans turning crazy as it is when pushing the serial port to high datarates). And as I have an audio soundcard with many free inputs I wonder why not use them.