This was my choice for the motion sensor installation. I discarded the dome
lens so that I could hide the sensor. I drilled all holes in the speaker area of HAL.
Placing the sensor behind one of the holes gave me a motion range of about 4ft.
I enlarged one of the holes, shown above, giving a range of about 10ft. Even
though this hole is larger, when looking at the front of HAL, this hole still blends
in.
This installation limited the annoying activation of every movement in my
office, giving me more control of when HAL activates. You may also choose to
install the sensor outside the model to use it with the dome if you need more
sensitivity.
Line up the motion sensor chip, the round protrusion with rectangular
window, centered over the large hole you drilled. Hot glue it in place. Make sure
the sensor is mounted flat, not angled in one direction or else the sensor will be
more sensitive to one side than the other. Mine is a bit off but I don't mind it :)
Test the sensitivity, if it works well for you, add a little more hot-glue.
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