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0-10V output — Parallax Forums

0-10V output

ArchiverArchiver Posts: 46,084
edited 2000-07-15 01:00 in General Discussion
How about a chip that provides a 0-10V output from stamp serial out
that can be scaled as needed? Has anyone ever used anything like
this, or have any Ideas?

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2000-07-14 20:38
    You probably already know you can integrate a PWM output on the Stamp to get
    0-5V. A PAK-V will do the same thing, but 8 channels at a time while the
    Stamp program is still running.

    It is pretty easy to make a x2 op-amp buffer that converts 0-5 to 0-10. The
    only issue is that with 8 bits of resolution, you get 5/256 = 19.5mV/step.
    If you x2 you get 10/256=39.1mV/step.

    The PAK-8 can do PWM (with a little math) in 16 bit steps. So then you get
    something like 5/65536 or 76uV/step in theory (x2 would be about
    152uV/step). However, at that small level, you may be dominated by system
    noise any way.

    Regards,

    Al Williams
    AWC
    * Expand your Stamp I/O with the PAK-III or PAK-IV:
    http://www.al-williams.com/awce/pak3.htm



    >
    Original Message
    > From: Chris Loiacono [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=DqWzwJO7sEGJh7a9C8rbLI_qeCKUpIaaOS6GrMC2dBS-MwZosjs-Vrv0n9Yd5qnPzHgYm9Ey4gUzfi6RGdSHgV06lvQyfbNy]chris@a...[/url
    > Sent: Friday, July 14, 2000 2:34 PM
    > To: basicstamps@egroups.com
    > Subject: [noparse][[/noparse]basicstamps] 0-10V output
    >
    >
    > How about a chip that provides a 0-10V output from stamp serial out
    > that can be scaled as needed? Has anyone ever used anything like
    > this, or have any Ideas?
    >
    >
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2000-07-14 22:28
    This could be done with a serial DAC- digital to analog converter (plus
    an operational amplifier ? )
    ACJacques


    Chris Loiacono wrote:
    >
    > How about a chip that provides a 0-10V output from stamp serial out
    > that can be scaled as needed? Has anyone ever used anything like
    > this, or have any Ideas?
  • ArchiverArchiver Posts: 46,084
    edited 2000-07-15 01:00
    Another suggestion could be a digital potentiometer.
    ACJacques

    Chris Loiacono wrote:
    >
    > How about a chip that provides a 0-10V output from stamp serial out
    > that can be scaled as needed? Has anyone ever used anything like
    > this, or have any Ideas?
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