Re: making a digitizer probe

> I had envisioned chucking up a piece of steel in a nylon collet and
> running a wire to the probe. The other end to the part. then
> whenever there is contact, the input changes state.
>
> Dave

Good idea for conducting items, not so good for plastics etc.

I suppose you would have to make sure the circuit would switch even
with a mild contact, you wouldn't want to end up with lots of dimples
on the origional. I suppose this is also true for switched types
making me think that my small but heavy slide might be a little too
heavy and mark the surface I was trying to scan.

What I need is a rod that will move precisely in and out of a small
bushing. I guesss I could make that myself but perhaps there is
something I can convert?

I also saw some special transformers in a catalogue with a rod that
extends out of them. They are used for posistion sensing and would
be ideal, however the price was not.

Cheers,

Graham