How do touch lamps work?


How do touch lamps work?

In: Technology

I know that much – WHY do they turn on when you touch them?

They use something called capacitance. It has a wire attach to the outside of the lamp that has a small voltage applied to it which is basically trying to shove electrons into the metal. The metal can only hold so many electrons, but if you touch it, some of them leak into your body, and the wire can now push more electrons into the lamp body.

When this happens, a small circuit detects this small flow of electricity and turns on the lamp.