However, [lonesoulsurfer] went a different route with this fun DIY build, creating an oscilloscope with a low-resolution LED display. Yes, the signals are shown on a 10×10 matrix made up of red LEDs.

We’re pretty sure he is not using an actual oscilloscope to generate the visuals, but rather visualization software that can approximate the output of an O-scope set in X-Y display mode.

An oscilloscope makes the invisible world of electricity visible, letting you observe electrical signals on a video display in real-time. For $25, the Flea-Scope plugs into any computer via USB ...