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#Training Camp# A Simple Digital Oscilloscope Based on STM32

Overview

The main control chip
used is the STM32F103C8T6,
utilizing a common STM32F103C8T6 minimum system board.
The STM32F103C8T6 has ADC and input capture functions, meeting the sampling requirements for signal waveforms and frequencies.
The power supply module
on the STM32F103C8T6 minimum system board includes a 5V to 3.3V converter; therefore,
the negative voltage of the operational amplifier circuit is provided by the XD7660 and omitted from the design.
The analog front-end processing circuit
consists of a voltage follower and an amplifier. Signal inputs include both AC and DC coupling, and
signal sampling has 1 and 10 ranges.
The display module
uses a 1.8-inch TFT screen to display waveform information.
Buttons and a rotary encoder
are used: the rotary encoder adjusts the display width,
and the buttons output a duty cycle-adjustable PWM signal for testing.

Design Files

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Update:2026-03-26 15:50:16

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