Hi there,
I need to read an analog signal that operates from 0-10V. Arduino Uno only accepts 0-5V. Is there another board that I could use to cover the range? Or is my only option to use two analog inputs?
Thanks
You can just divide your 0V-10V signal down to 0V-5V using a voltage divider:
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The Ruggeduino: compatible with Arduino UNO, 24V operation, all I/O's fused and protected
Or is my only option to use two analog inputs?
That is not an option at all from what I can see. How would you propose to do that?
Grumpy_Mike:
Or is my only option to use two analog inputs?
That is not an option at all from what I can see. How would you propose to do that?
By being 'creative'? Subtract 5V with a floating voltage source and then measure the resultant +/-5V differentially between two analog pins (again floating loosely)
By being 'creative'? Subtract 5V with a floating voltage source and then measure the resultant +/-5V differentially between two analog pins (again floating loosely)
Arduino analog input pins are single ended and ground referenced. Can you provide a drawing showing your 'creative solution?
Lefty
Think of a 'bridge tied load' output circuit and then think of it as an input circuit rather than output - you need some trick to hold the mean voltage of the +/-5V signal at 2.5V - basically this relies on the signal being measured being floating w.r.t. Arduino. And then you need a 5.0V battery to subtract that 5V offset!
MarkT:
Think of a 'bridge tied load' output circuit and then think of it as an input circuit rather than output - you need some trick to hold the mean voltage of the +/-5V signal at 2.5V - basically this relies on the signal being measured being floating w.r.t. Arduino. And then you need a 5.0V battery to subtract that 5V offset!
That sure sounds like a foxtrot uniform solution. 
Compared to two 10k resistors, yes!
And then you need a 5.0V battery to subtract that 5V offset!
Seen many 5v batteries then?