In message  <610ad388.34b69691@aol.com> PICLIST@MITVMA.MIT.EDU writes:
> ello
>
> I need a very accurate linear position sensor, that can measure verticle
> object travel of approx 1.5 inches. Cost is an issue. It will be an input for
> a PIC16F84, so a digital signal would be less work.
>
> Can anyone help?
>
Jon,

Several methods come to mind some cheap, some not so:

 o LVDTs  (not so cheap and will need external conditioning, but
           very reliable).

 o Slider POTS  (cheap and can be directly interfaced to C84 as
                 as recent thread has explored).

 o Sony MagnaScale (not so cheap, but with quad encoded output
                    so direct connection to C84 is possible).

There other methods which I'm sure others will mention.


Regards,


Mike Watson

--
Denison Mayes Group