> Its crude but a 6mm hole with a 3 mm rod inside it a small weight
> beneath the hole and suspend the rod from a piece of fishing twine. Make
> the hole conductive and there you have it a bump sensor (same as used in
> pinball machines) to change sensitivity make hole larger / smaller and
> decrease / increase the distance to the pivot point or change the
> weight.
>
>         Works in 360 degrees (all axis) to restrict to two access make
> only part of the hole conductive you can then choose the axis of
> response.
>
> Option 2 (contact less)
>         Same as above but you can use two slotted opto switches and
> organize them so that the rod intersects the beams on both switches
> hence the thickness of the rod should be only a little more that net
> response area of the photo transistor same principle as above but with
> less contact bounce
>
>
> Steve....
>