Measuring RPM''s at relatively slow speeds.
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Posts: 46,084
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]
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]