[Shop-talk] Driveway Motion alarm question

[Ronnie Day]

Check the angle of the sun during the period it's throwing false alarms and
build a cover or shade to block the sunlight on the sensor during those
times? Should be pretty straight forward.

On Wed, May 12, 2021 at 10:22 AM <eric at megageek.com> wrote:

> I have a driveway motion alarm that has work well for years.  Recently, I
> had work on the house and had to move it.
>
> Now, I get a lot of false alarms on sunny days.  It's (I believe) an
> infrared system.  The sensor just puts out a beam and does not require a
> reflector.
>
> The new location is slight higher (about 1') than the old location and
> moved down a bit.  I can't put it back in the old location do to the
> changes.
>
> If I put the sensor indoors, it works perfectly.  It also works perfectly
> at night or during rain.
>
> The side opposite the sensor is a slight hill with grass.  I have
> completely removed all the grass to make sure that wasn't setting it off.
>
> It seems to get false alarms for about an hour during midday on sunny days.
>
> So it seems the sun as something to do with it, but what?  Any ideas I can
> try to stop the false alarms?
>
> Thanks.
>
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