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Counting — Parallax Forums

Counting

ArchiverArchiver Posts: 46,084
edited 2000-09-11 18:59 in General Discussion
Hello

Was wondering on a project that I'm wanting to start How fast can the Stamp 2 count?
I'm wanting to put a sensor on a motor and RPM's could exceed 10k rpm's. Is the stamp capable
of reading a input that fast?

Thanks
Gene

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2000-09-11 16:04
    Sure. 10K RPM means a period of 60/10000= 0.006 s or 166.66 Hz.
    BS2 count instruction can read period short as 0.000008 s or about 125
    KHz in frequency.

    ACJacques



    Gene Shults wrote:
    >
    > Hello
    >
    > Was wondering on a project that I'm wanting to start How fast can the
    > Stamp 2 count?
    > I'm wanting to put a sensor on a motor and RPM's could exceed 10k
    > rpm's. Is the stamp capable
    > of reading a input that fast?
    >
    > Thanks
    > Gene
  • ArchiverArchiver Posts: 46,084
    edited 2000-09-11 18:59
    Hi Gene, remenber that you have to pass the tachometer output through a Flip-Flop if you're using a hall effect switch, and, Stamp 2 can detect pulses as short as 4 microseconds in lenght.

    ··· Carlos...
    Mensaje original
    De: Gene Shults [noparse][[/noparse]mailto:gshults@ocslink.com]
    Enviado el: Lunes, 11 de Septiembre del 2000 07:41 a.m.
    Para: basicstamps@egroups.com
    Asunto: [noparse][[/noparse]basicstamps] Counting

    Hello

    Was wondering on a project that I'm wanting to start How fast can the Stamp 2 count?
    I'm wanting to put a sensor on a motor and RPM's could exceed 10k rpm's. Is the stamp capable
    of reading a input that fast?

    Thanks
    Gene
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