Week 12

I'm dreaming of a home oscilloscope. A tool for visualisation electric signals. There are two problems - such a tool costs as much as my laptop, and I can't carry an desktop oscilloscope since it's too large. During this week I wrote a simple application that can do visualisation of analog voltage. I wrote it in Processing IDE. For sampling I use my ATmega328 board, which sends analog voltage over serial FTDI Cable. I is not as fast as a desktop oscilloscope (about 50Mhz), it does only about 120 samples per second (120Hz), but that's enough for simple electronic needs. Here is the application (tested under Ubuntu 13.04, Windows 7, picture from my dad's computer with Windows XP) with an potentiometer attached to analog pin A0, which I randomly rotated: