First secret: your body contains salty water with tiny charged particles. Those particles can move, making your body a conductor. A nearby conductor can change the screen’s electrical pattern.
Second secret: the glass hides a grid. Tap to switch it on — tiny squares sense changes in stored charge when a conductor comes near.
A finger or a metal spoon held in your hand is a conductor that can change the grid’s signal. An ordinary plastic tip is an insulator; in our model, its signal is too small to detect.
Your turn. Pick a toucher, then tap a spot on the screen — watch the charge meter.
A nearby conductor changes the signal. Tap and compare.
But you never tried pressing…
Put on a thick wool glove and mash the screen as hard as you can. Surely all that force pushes a touch through… 🤔 Dry wool’s charges cannot move freely like those in salty body water or metal.
Our model detects an electrical change from a bare finger.
Wearing a thick wool glove, you press the screen as hard as you can. Does it notice your tap?
Press the wool glove — from feather to MASH ⬇
Slide all the way to MASH IT.
