What is capacitive sensing
This is how the Touch Board works, but what does it really mean?
Capacitive sensing is a proximity sensing technology. It detects nearby objects by sensing that the electric field generated by a sensor (in this case one of the 12 electrodes), has been disrupted. It can detect anything that is conductive or that has a significantly different permittivity* than that of air, like a human body or hand.
Capacitive sensing is the technology used in smartphone screens to detect touch. It’s also used in other situations where there’s a need to detect human touch or proximity. It’s also used when trying to detect something without touching it.
Ever wondered what to do with your Touch Board? Check out this resource!
Download this guide to see the world of objects you can connect to the Touch Board
Learn how to make a simple capacitance sensor using a pad of Electric Paint, an Arduino and a resistor.
The Touch Board has 12 capacitive sensing electrodes, each of which can individually detect touch and proximity.
*Permittivity [put-mi-tiv-i-tee] is the measure of the difficulty encountered when forming an electric field in a material. The ability of a substance to store electrical energy in an electric field.
Touch screens on your smartphone or tablet, or the trackpad on your laptop also work with capacitive sensing.