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Digital Pot with BS2sx? — Parallax Forums

Digital Pot with BS2sx?

CraigCraig Posts: 2
edited 2005-02-20 08:42 in BASIC Stamp
I need to create a digital pot with the Stamp.· I wanted to know where I can find out more information on how to setup the BS2sx Stamp to run as a digital pot for on the fly resistive value change.
Anybody know???

Craig

Comments

  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2005-02-20 03:33
    If you need a Digital Pot, here is a place to start:

    http://www.maxim-ic.com/DigitalPotentiometers.cfm

    Many can be controlled by the BASIC Stamp.



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    --==<{Chris}>==--
  • CraigCraig Posts: 2
    edited 2005-02-20 05:46
    Thanks Chris,
    that will do exactly what I'm looking for.· I am wondering, does anybody know how to build the digital pot circuit without having to buy a packaged part or is this the only way to do this?

    Craig
  • Paul BakerPaul Baker Posts: 6,351
    edited 2005-02-20 08:42
    If your aim is to get an analog voltage, a 2R/R Ladder will work (Its a method of doing DAC), a true digipot is also possible but requires more external parts (an R ladder and analog mux (like the CD4067BE which would give 16 taps))
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