#Training Camp# A Simple Digital Oscilloscope Based on STM32

A digital oscilloscope is an instrument used to display electrical signal waveforms. It mainly consists of analog front-end processing circuits, microcontroller circuits, power supply circuits, control circuits, trigger circuits, and calibration circuits.
 
This project presents a simple STM32-based oscilloscope for detecting and displaying waveforms. It features an adjustable PWM square wave output with adjustable frequency and duty cycle, powered via Type-C.
 
The input signal amplitude can be measured from -1.6V to 5V and from -80V to 250V by adjusting the switch. When the input signal amplitude is small, the lower voltage range should be selected first. If the input signal amplitude is uncertain, the higher voltage range can be used first. If it falls within the lower voltage range, the lower voltage range can be used for more accurate measurement results, while also protecting the circuitry.

An additional PWM signal is used to simulate a simple function generator, allowing the output of a simple square wave signal by changing the frequency and duty cycle of the output PWM.

 
Engineering design source:
202: Simple Digital Oscilloscope Project Document (yuque.com)
【LCSC GD32E230C8T6】Simple Digital Oscilloscope Design - Feishu Cloud Document (feishu.cn)
The core board supports LCSC's GD32 small board and STM32F103 small blue board, but the programs used are different.