I heard something about a PCB tray that senses objects placed on it (and
when they are taken from it). This seems to do the job. I heard the PCB
itself would be able to sense it, with no external components. How ? Using
the object to alter the capacitance between two tracks ?






----- Original Message -----
From: "Russell McMahon" <apptech@PARADISE.NET.NZ>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Sunday, January 11, 2004 9:48 PM
Subject: Re: [OT:] Minibar ideas ?


> > A bar code scanner reader could be a solution, but not sure about how
> > expensive will be.
>
> That would have to be a mini-barcode scanner :-)
>
>
>
>         RM
>
> --
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