A neat table, made using these: http://www.ebay.com/…/2pcs-IR-Infrared-Obstac…/401063075418…
"Arduino 2 - Completion of a project. Two 24" x 26" boards (pegboard) filled with 818 blue LEDs, 160 IR emitters, and 190 IR receivers. All organized into 190…" -https://youtu.be/OLfF4b49MLs>youtu.be/OLfF4b49MLs

Can we do the same thing with 1 arduino and photo sensors and LEDs instead?