I found this very interesting when I was reading SciAm last night.

https://www.scientificamerican.com/article/how-to-convert-your-wall-into-a-giant-touch-screen/

buffy said:

I found this very interesting when I was reading SciAm last night.

https://www.scientificamerican.com/article/how-to-convert-your-wall-into-a-giant-touch-screen/

> Researchers recently converted a wall into an outsize trackpad and motion sensor by using low-cost conductive paint to create a large grid of electrodes.

Capacitance? Electrostatics? Electric conduction? Is there an electrical engineer in the house?

> The user must be within three feet of the wall for it to work

That’s not a limitation.

> In the wall’s appliance-detection mode, the power is turned off, and the electrodes act as an antenna to passively pick up electromagnetic waves emitted by nearby devices. The researchers detected iPads up to 6.5 feet away from of the wall; fans and floor lamps could be sensed from about 10 feet.

Just so long as no-one wires up an electric fence to a wall.

As a burglar alarm it would be very interesting.

If these walls could talk…

One day, they will.

Divine Angel said:

If these walls could talk…

One day, they will.

Loudspeakers are made of thick paper. Traditional Japanese homes are made of thick paper.

Go figure.