You could have two mercury switches in opposite directions laying flat or
better yet, slightly down, next to each other. One will switch one way
while the other will switch the other way. This will of course work
assuming the same part (LED's) face the front everytime. Which in your
case they probably will.

On Fri, Sep 01, 2000 at 10:30:50AM +0100, Brian Jones wrote:
> 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.

--
___________________________________________
Wesley Moore
RMIT - BEng/BApp.Sc. 2nd Year

wmoore@cs.rmit.edu.au
http://wmoore.tsx.org/

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