Everyone knows that one of the coolest things to do with a Tesla coil is to light up neon or ... So he took 100 of these little neon bulbs and arranged them in a 10×10 grid on a piece of perfboard.

Here’s a fun video by [Ashish Derhgawen], discussing the photoelectric effect of neon lamps with some simple demonstrations. Orange light makes it light! [Ashish] demonstrates the well-known ...