This is a basic oscilloscope on STM32F103C8T6 microcontroller. Circuit board is kept very simple. No any fancy analog stuff – just diode protection circuit and resistors divider. It is a two channel 8-bit scope with 300kSps each. It accepts voltage levels from 0 to 6.6V.
Data stream via USB is live and goes to PC GUI called miniscope v4.Here you have some basic controls including sampling rate, triggering source and level, buffer size and other handy stuff.