In a previous post, we highlighted a DIY oscilloscope project that used an Arduino Pro Mini and an old Nokia cell phone LCD to create a quick and dirty oscilloscope. That build is great for a portable solution. However, what if you want a bit more power and polish?
Filear.com posted a cool hack that can be done in an afternoon if you have the parts handy. The author built a DIY oscilloscope using an Arduino Pro Mini and the LCD from a Nokia 3310. The Arduino is wired up to sample from an ADC port and writes those values to the screen to create a waveform. Two potentiometers control the sampling speed and input voltage for approximate time and amplitude scaling just like the real thing.