Re: gEDA-user: Contact reliability

[Karel Kulhavy <clock@xxxxxxxxxxxxx>]

On Wed, Jan 19, 2005 at 07:42:33PM -0500, Bob Paddock wrote:
> On Wednesday 19 January 2005 01:41 pm, Karel Kulhavy wrote:
> 
> > What are the conditions under which 100% reliable contact between two
> > metals is guaranteed? My hypothesis is that there are only two
> > possibilities:
> >
> > 1) gold-to-gold
> > 2) The touch point is under permanent great preload
> 
> You could try some of this new Peratech material:
> 
> http://www.peratech.co.uk/pills.htm

Oh shit. 10 ohms at 2kg preload. I imagine something like 1-10 milliohms.

> 
> The follow discusses switches, but the same idea could apply to a
> bulk-head style connector.
> 
> They have some other cool products as well.  Seems to be a material in search 
> of an application...

If the pill would do 1 milliohm at 0.1kg, I would consider it a cool product.

Cl<