Glows where the object is kept on the table.
Reactive table is a table containing led matrix at its surface.When ever any object is placed on the top of it, it glows thereby making the table interactive.
The video contains two pixels of the table which glows when something comes infront of it.
The pixels can be created in a pair of two as the IC LM358 used is a dual op-amp which can be used as a comparator.
Each pair of pixels needs 2 Infrared detectors , 1 Infrared transmitter , 1 LM358 , 5 resistors (10k*2, 100ohm*2 ,1 330ohm) and a variable resistor(10k).
3. Below is the circuit diagram for the pixel :
The number of pixels can be made according to the size of the table used and connect in parallel with each other.