Measuring RPM''s at relatively slow speeds.
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Posts: 46,084
I know you want to build it yourself but look at www.littlemacineshop.com
for the rpm readout. It my point you in the right direction.
Original Message
From: smartdim@a... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=PzLRhEhnCwEv_cfYYAL3XO0qHOuAIgXcRO5fwdmUU5pRpgVlgFVckR63dl6QNa9eW2sw2urCOHo]smartdim@a...[/url
Sent: Wednesday, May 28, 2003 1:14 PM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Measuring RPM's at relatively slow speeds.
In a message dated 5/28/2003 9:15:53 AM Pacific Daylight Time,
john@l... writes:
>
> Thanks Smartdim, that is exactly what I was looking for.
>
> Just curious, does it help at all to color the 'disk' part either all
> white or all black? Would that improve the operation or should I just
> leave well enough alone.
>
> I think I should buy stock in DigiKey, I'm ordering weekly [noparse]:)[/noparse]
>
>
> -John
>
Color of the disk does not matter. However, the sensor/receiver should be
sheilded from ambient light. So if this is an outdoor application you will
want
to enclose the sensor. Sunlight at the right angles will trick the
phototransistor into see the beam.
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for the rpm readout. It my point you in the right direction.
Original Message
From: smartdim@a... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=PzLRhEhnCwEv_cfYYAL3XO0qHOuAIgXcRO5fwdmUU5pRpgVlgFVckR63dl6QNa9eW2sw2urCOHo]smartdim@a...[/url
Sent: Wednesday, May 28, 2003 1:14 PM
To: basicstamps@yahoogroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Measuring RPM's at relatively slow speeds.
In a message dated 5/28/2003 9:15:53 AM Pacific Daylight Time,
john@l... writes:
>
> Thanks Smartdim, that is exactly what I was looking for.
>
> Just curious, does it help at all to color the 'disk' part either all
> white or all black? Would that improve the operation or should I just
> leave well enough alone.
>
> I think I should buy stock in DigiKey, I'm ordering weekly [noparse]:)[/noparse]
>
>
> -John
>
Color of the disk does not matter. However, the sensor/receiver should be
sheilded from ambient light. So if this is an outdoor application you will
want
to enclose the sensor. Sunlight at the right angles will trick the
phototransistor into see the beam.
[noparse][[/noparse]Non-text portions of this message have been removed]
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/
[noparse][[/noparse]Non-text portions of this message have been removed]