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.
This is my Christmas project for my little darling!
S.M.S. (Scatola Magica della Solitudine) [in english: Magic Box of Loneliness].
The goal was to give her a present to remember me and don’t feel loneliness. The box have two buttons. Button A shows some random sentences to encourage her. Button B shows a simple romantic “cartoon”. ;)
The core is an Arduino Duemilanove board. The lcd used is this one, with some code from here, and the code used for cartoon and “sentence random function” are totally mine.