[sdiy] Cheap 'push screen' controller?

[ChristianH]

I'd suspect that moving a virtual slider will tilt the whole assembly 
(due to friction on the surface), which will induce it's own horizontal
force component adding to the vertical finger pressure. It may be
difficult to deal with both forces, in order to have meaningful output. 

But then, most probably this additional force component will be pointing
towards the slider's end anyway (in terms of sensor readout). But for
detecting *where* the slider has it's end point, it may have to be taken
into account. I.e. simply pointing to the end point will generate
something different than dragging at that very same location.

Chris



On Wed, 9 May 2007 20:23:42 +1000 "Paul Perry" <pfperry at melbpc.org.au>
wrote:

> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Loscha
> Sent: Wednesday, 9 May 2007 12:51 PM
> Thinking about a simple LCD sequencer control interface, it occurred to me
> that if you had a LCD display flat on a table, with force sensors under each
> corner, and applied a force vertically to the screen, then (remembering
> vectors etc) you can work out 1. where on the screen you are pressing and 2.
> how hard you are pressing.
> Which could be good for a slider type interface, where you press is
> determines which slider & how hard, the amount.
> Plus you need a button to lock (or unlock) the slider when you are at it.
> 
> Don't know whether this would be useful, but it might suit someone. 
> Indeed, it probably exists already.
> 
> Paul Perry Melbourne Australia