My Processing slider

To do a preliminary check on how to collect data from the Internet and control the Arduino board, I will first build a Processing slider that will simulate the differencies on the values read from the Internet. Once everything will work, instead of the Slider I will use real data.
So here I will explain how […]

Computers can’t talk analog, so somebody invented PWM (Pulse width modulation)

Computers are not able to output analog signal, or at least they can’t while talking through a serial port and a serial communication. At the same time they cannot read analog signals too. This is the reason why modems exist and what they do is to transform analog signal to digital and viceversa.
How do […]

A supplier of piezoelectric pressure sensors

Unfortunately it is in America but here is the link: XactMan.
There is one which is particularly interesting and is the one on the picture below:

Image from XactiMan
It is quite cheap and it will probably be good for Arduino projects.