We currently have an application where we need to output a controlled 0V-10V signal, and I’m looking for a suggestion as to the best way to provide this variable output voltage (not sure if I can use an existing board, or if I need something like a digital POT to attach to an existing board).
We have a servo-controlled valve that we would like to drive from a micro controller (or servo/motor controller - I really like the Maestro due to its simple on-board scripting). The problem is that the valve does not expose the servo control direclty, but rather, has its own components for servo control and expects only a raw voltage across two pins in order to function. Supplying 0V puts the valve in the “close” position, 5V in “half-open” and 10V in “full open” position (to be clear, there are not just three stages; any voltage in-between 0V-10V puts the valve at that percentage of “openess”) We would like to be able to control the output in at least 1-2V increments to control the positioning of the valve.
Is there a way to use an Orangutan or Maestro or Qik/Jrk module to control an analog output signal as described above? Or do I need a digital POT IC? I’ve found this online maxim-ic.com/products/digi_pot/ but I’m not sure where to actually buy them, or which would be the most appropriate to use.
Any suggestions on how best to handle this kind of analog output would be greatly appreciated!