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Speed Indicator ideas needed. — Parallax Forums

Speed Indicator ideas needed.

ArchiverArchiver Posts: 46,084
edited 2002-01-08 06:15 in General Discussion
I would like to learn how to use the Stamp technology, so my starter
project is to build a simple speed indicator for a canoe....

Any ideas on what to use for a transducer? A simple paddle wheel
with an embedded magnet would be good, but have no idea where to buy
one...

Any thoughts?

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2002-01-08 00:55
    Try a toy store. They have all sorts of things that can be converted into
    useful applications. I highly doubt you'll be able to find one that's
    affordable AND designed to do exactly what you want. All of the flow meters
    that I've seen have been awful pricey from the hobbyist viewpoint.

    If you are taking a propeller-like substance and adding magnets, add two so
    you don't throw the balance way off. I'd think that a paddle-wheel type deal
    would be best. The larger the diameter, the better, too. (Of course,
    assuming that obtrusiveness is not a factor.)

    Cliff
    Original Message
    From: "jedaworks" <jedaworks@y...>
    To: <basicstamps@yahoogroups.com>
    Sent: Monday, January 07, 2002 3:36 PM
    Subject: [noparse][[/noparse]basicstamps] Speed Indicator ideas needed.


    I would like to learn how to use the Stamp technology, so my starter
    project is to build a simple speed indicator for a canoe....

    Any ideas on what to use for a transducer? A simple paddle wheel
    with an embedded magnet would be good, but have no idea where to buy
    one...

    Any thoughts?


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  • ArchiverArchiver Posts: 46,084
    edited 2002-01-08 01:02
    Hello,
    You might get in touch with Michael Gianturco. He's built a speed
    indicator for an R/C sailboat and posted a message about it on Dec 27.
    bg

    "....A small boat is to be towed behind the racer. It has a freely
    spinning propellor, and on the propellor shaft, spinning along with
    the prop, is a magnet. A bipolar Hall detector/Schmitt trigger chip
    (Allegro 3132) senses the passage of the North and South poles.
    The BS2 counts the pulses for about a quarter of a second, then
    multiplies the count by a scaling factor....

    Michael Gianturco"
  • ArchiverArchiver Posts: 46,084
    edited 2002-01-08 02:34
    For a simple commercial impeller with a magnet machined into the shaft, try

    www.speedtech.com

    Their impeller is designed for use on sailboards.

    jedaworks wrote:

    > I would like to learn how to use the Stamp technology, so my starter
    > project is to build a simple speed indicator for a canoe....
    >
    > Any ideas on what to use for a transducer? A simple paddle wheel
    > with an embedded magnet would be good, but have no idea where to buy
    > one...
    >
    > Any thoughts?
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the Subject and Body
    of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
  • ArchiverArchiver Posts: 46,084
    edited 2002-01-08 04:03
    Hello jedaworks,

    How about just a simple lever on a pot. 0 speed the lever is straight
    down. As you move forward the lever moves back.

    Rod

    Monday, January 07, 2002, 6:36:25 PM, you wrote:

    j> I would like to learn how to use the Stamp technology, so my starter
    j> project is to build a simple speed indicator for a canoe....

    j> Any ideas on what to use for a transducer? A simple paddle wheel
    j> with an embedded magnet would be good, but have no idea where to buy
    j> one...

    j> Any thoughts?
  • ArchiverArchiver Posts: 46,084
    edited 2002-01-08 04:39
    I like the idea, I can see the simplicity of it... but cannot see how
    it could be made waterproof, yet still be precise under low flow
    conditions. The canoe is a Hawaiian 6 man outrigger, so we run in
    salt water (big waves and rough water with occassional capsizes...)
    and need something corrision resistant and waterproof.

    --- In basicstamps@y..., "a.rodriguez" <stuff@m...> wrote:
    > Hello jedaworks,
    >
    > How about just a simple lever on a pot. 0 speed the lever is
    straight
    > down. As you move forward the lever moves back.
    >
    > Rod
    >
    > Monday, January 07, 2002, 6:36:25 PM, you wrote:
    >
    > j> I would like to learn how to use the Stamp technology, so my
    starter
    > j> project is to build a simple speed indicator for a canoe....
    >
    > j> Any ideas on what to use for a transducer? A simple paddle
    wheel
    > j> with an embedded magnet would be good, but have no idea where to
    buy
    > j> one...
    >
    > j> Any thoughts?
  • ArchiverArchiver Posts: 46,084
    edited 2002-01-08 06:15
    What about using the interuptor wheel and sensor parts from a mouse?

    John
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