I want to create an LED coffee table like this http://www.geeky-gadgets.com/wp-content/uploads/2009/06/rgb-led-coffee-table.jpg. The table itself is no problem and I am already driving a load of addressable RGB LED's for the display.
The bit I'm not sure about is using IR receivers/transmitters for the hand detection (as someone touches the table.)
I have brought some receiver/transmitter LED's on ebay, however I think I might have brought the wrong receivers as they are just 2 pin. If I wire them up and check the voltage i can see a very slight change when my hand goes over it (to bounce the transmitter back to the receiver) however i think there is so much IR coming from home lighting and natural light that its going to be hard to really detect things.
Also, i intend to use a shift register so that I can read 8 at a time serially, so really need a high/low value instead of a gradual voltage.
Any pointers in the right direction would be great.