These are what I use in the AC-22 Performance Meter I designed.
The new smaller packages ones are cheaper.  If it's just for a one
off you can register for samples and you get a couple free in the
post.  Can't get much cheaper than that.  If you are really smart with
it you can probably get velocity information for your display and
change the display accordingly.

Regards

Martin

> Brian,
>
> Not so cheap but ADXL202
> http://www.analog.com/industry/iMEMS/products/ADXL202.html
> looks like a good solid state solution.
> Or, you can use a spring and 4 screws...
> (use a fixed font to see the schematic)
>
>
>                  0 <-screw/ground
>                  | <-spring
>                  |
>     contact-> 0  | 0 <-contact/pulled-up
>                  |
>                  |
>                  |
>                  0 <-screw
>
> stress or relax the spring as needed...
>
> Hope this helps.
>
> Ricardo Seixas
>
>
> >As a simple project for my local radio club I've designed a PIC
> >Magic Wand that flashes 7 LEDs leaving a trailing message in the
> >air. The flashing (ie message) is triggered by motion sensored by a
> >mercury switch.
> >
> >Works fine if you wave right to left but moving left to right the
> >message is mirror imaged (of course).
> >
> >Any ideas on a simple (and cheap) method of detecting whether
> >motion is left-right or right-left so I can invert the message as
> >appropriate. 2 mecury switches mounted in some way so that the
> >leading edge triggered first seems the obvious solution but how to
> >actually implement this?
> >
> >Thanks
> >
> >Brian
> >Brian E Jones
> >Centre for Java Technology
> >IBM HURSLEY
>
> --
> http://www.piclist.com hint: The PICList is archived three different
> ways.  See http://www.piclist.com/#archives for details.

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.