This Build Puts a Basic Digital Storage Oscilloscope in the Palm of Your Hand
While limited — particularly in being unable to read any voltage below 0V — Creative Lau's project is simple, cheap, and quickly assembled.
Maker Creative Lau has published a guide for building a simple miniature digital storage oscilloscope (DSO), powered by a DIP-packaged STC Micro STC8A8K64S4A12 microcontroller installed onto prototyping board.
"This is a simple oscilloscope made with STC MCU," Lau explains of the project. "You can use this Mini DSO to observe waveform [with a] time interval [of] 100us-500ms, voltage range [of] 0-30V, [and a] draw Mode [of] vector or dots."
As well as the microcontroller, the build uses a compact SPI-bus OLED display, a 3.7V lithium-ion battery pack for portability, a 5V boost converter, and a rotary encoder and switch for its user interface and to power it on and off.
While limited — the oscilloscope, once assembled, is unable to read negative voltages, meaning that its readings will always stop at zero regardless of how low the voltage goes, it's a simple build — and goes hand-in-hand with an earlier STC-powered function generator Lau has showcased on his YouTube channel.
The full build guide for the DSO is available on Instructables.