[sdiy] Proximity volume control.

[Paul Perry]

I have used a 'security' type IR sensor in an art installation,
but I didn't find it sufficiently precise for getting any idea
of actual distances.

If one simply wants an on/off, then it is pretty hard to beat a
pressure map or a standard light beam break circuit.

paul perry Melb Aust

----- Original Message ----- 
> I think an inexpensive IR "proximity detector" for home alarm systems can 
> be tinkered with to give you the signal you ned. Then it's a small matter 
> to scale up the output to control pretty much whatever you want.
> Rig