There’s no substitute for a proper oscilloscope ... Arduino based oscillscope for a while now. He keep squeezing more and more performance out of it. A previous version hit 3 megasamples using ...

While it might be nice to use a $4,000 oscilloscope in a lab at a university ... It’s based on an ATxmega which is your standard Arduino-style AVR microcontroller but geared for low power ...