All about tech gadgets and products I will buy around the world, and lifehacker or DIY tips!
A new project done. ;) Exams passed and free time increases a bit.
This is a capacitive button done with an Arduino, the CapSense Library, a 1M Ohm resistor and a thin aluminum foil.
The principle is very easy: this is a capacitive sensor that measures the electric charge of human body or other metal items. It needs an 1M Ohm resistor to work as a button, from 10 to 20M Ohm resistor to sense at 6-7 cm, or 50M Ohm resistor to activate the input from 20-30 cm of distance.
In the video you can see a direct application. A ledbar shows the distance read and a relay (you can hear its “clack” on the background) is activated when the sensor is completely touched.