An extremely basic oscilloscope is better than none at all and sometimes it’s more important that the device is very small, standalone and easy to handle. Here we see measurement data displayed graphically on the LED display using 5×5 LEDs (Listing◦1). Even if you are accustomed to a far more sophisticated instrument, you can definitely get results with this little alternative. It is quite remarkable to see what’s still discernible with such a simple ‘scope.