Swinging boom, two sensors?
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Hello Reginald,
This is an interesting idea. I don't quite see how it would be configured,
however.
I would really like to give the system a sense of direction, that is, a sense of
the direction of rotation.
If the two magnets (and the corresponding switches) are in line along the boom,
wouldn't they both trigger
simultanously?
How should I place the sensors?
Reginald Neale wrote:
> >How about a small magnet affixed to the boom and a
> >couple of reed switches or hall effect sensors to
> >detect the magnet? The reed switches or hall effect
> >sensors will be detected as digital/discrete inputs.
>
> Good idea, and would probably work better with two reed
> switches and two magnets, offset radially along the boom.
> This way you get a separate output for each direction.
>
> Reg Neale
>
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This is an interesting idea. I don't quite see how it would be configured,
however.
I would really like to give the system a sense of direction, that is, a sense of
the direction of rotation.
If the two magnets (and the corresponding switches) are in line along the boom,
wouldn't they both trigger
simultanously?
How should I place the sensors?
Reginald Neale wrote:
> >How about a small magnet affixed to the boom and a
> >couple of reed switches or hall effect sensors to
> >detect the magnet? The reed switches or hall effect
> >sensors will be detected as digital/discrete inputs.
>
> Good idea, and would probably work better with two reed
> switches and two magnets, offset radially along the boom.
> This way you get a separate output for each direction.
>
> Reg Neale
>
> 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/
Comments
>
>This is an interesting idea. I don't quite see how it would be
>configured, however.
>
>I would really like to give the system a sense of direction, that
>is, a sense of the direction of rotation.
>
>If the two magnets (and the corresponding switches) are in line
>along the boom, wouldn't they both trigger
>simultanously?
>
>How should I place the sensors?
OK, I am ashamed to admit I am ASCII-art impaired. Let's see, both
magnets are mounted on the boom but one of the magnets is closer to
the mast than the other. One of the reed switches lines up radially
with magnet A and actuates when the boom swings in the CW direction,
the other lines up (at a different radial distance) with magnet B and
actuates when the boom swings in the CCW direction. When the boom is
straight fore/aft, neither switch is actuated. You could really do it
with one magnet and two reed switches, one on either side, but two
magnets would make the adjustments more independent.
Hope this is clearer.
Reg