I want to get and set values for a motor potentioneter ALPS RK16812MG from a raspberry pi. I found a similar approach here however, the answers in that forum suggest a different wiring with an additional power source. Also, in that thread, there is no wiring for reading the potentiometer value. My questions:

  • Can the L 293 D, mentioned in that thread, also take care of reading the current potentiometer value or do I need another A/D converter there?
  • Could you give me an example on how to wire everything properly with an additional power source
  • (and, maybe you could explain to me, what this "optical decoupling" is, that the thread is talking about)

Data Sheets

  • You really need to link to the specs of the device. I have no idea how a motor potentiometer is used. The L293D is a motor driver chip - it is used to supply power to a motor. You need an ADC to read a potentiometer.
    – joan
    Mar 16, 2019 at 15:10
  • I have added the data sheets for both components, if anything else is not clear - please tell me.
    – Milla Well
    Mar 16, 2019 at 16:26
  • Is the following correct? "The ALPS is used to twist a shaft, either manually or by applying power. The current shaft angle can be determined by reading the potentiometer resistance." Might be useful to add your usage to the question.
    – joan
    Mar 16, 2019 at 16:35


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