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.

The second part of this DI describes the experimental results obtained after building it. The oscilloscope is based on a popular low-cost DIY platform. Analog and digital signal processing techniques, ...

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.