STM32 simple instrumentation

Introduction: A simple gadget that integrates a simple oscilloscope, a simple function signal generator, resistance measurement, an adjustable power supply, and an output current measurement (source code and V1.1 test report are provided)

1. Product Introduction

A simple oscilloscope based on , a simple gadget that integrates simple function signal generator, resistance measurement, adjustable power supply, and output current measurement (source code and V1.1 test report provided).


2. Application Scenario

1. For reference study or daily use by electronic enthusiasts or electronic major students (will share the entire process of designing this project)


3. Product Overview

A simple instrument based on STM32F103RCT6, with a simple oscilloscope and a simple function signal generator , resistance measurement, adjustable power supply, output current measurement and other functions. Adjustable power output, resistance measurement, and signal output all use DC interface output. The oscilloscope signal input is MCX interface input. It can be directly plugged and unplugged during use, which is very convenient.


4. Product parameters

1. PCB length and width: 82.55mm*53.975mm.

2. Final thickness: <2cm.

3. Oscilloscope sampling rate: <=1M.

4. Resistance measurement range: 0~10M, accuracy +-1%.

5. Adjustable power supply output voltage: 3.7~13V, output current <1A.

6. Output current measurement range: 0~1.65A, resolution 0.8mA, accuracy +-1.6mA.

Please see the reference design download column for the front and back of the PCB.


5. Instructions for use

1. There are still many design problems with this product. It is only for learning, reference and discussion. Please do not proof the PCB directly. For specific design issues, please see the STM32 Simple Instrumentation V1.1 test report, which records all current hardware design issues of the V1.1 version, including analysis of the causes of related problems, rectification plans, and links to materials referenced during the rectification process. My abilities are limited. If you find other design problems or have better suggestions in the schematic diagram or PCB, please leave a message for discussion. I will also update the V1.2 version as soon as possible, and will update it simultaneously in the Hardware Society.

2. This product requires burning firmware for use. For the program source code, please see STM32 Simple Instrument Source Code.V1.1.

3. This module alone cannot be used. It also needs to be equipped with 2.8-inch 18PIN plug-in TFT color screen (without touch), lithium battery (104060-3000MAH lithium battery is recommended), copper pillars and other accessories. It is recommended to use PCB to fix the color screen. Please see the attachment STM32 simple instrument display.


6. Remarks

1. This product is currently for learning and reference only. Please do not proof PCB directly! ! !

2. All information on this product is currently open, but it is only a semi-finished product at the moment, and the design will continue to be updated in the future.

3. The BOM does not include lithium batteries, TFT color screens, copper pillars and other related accessories. For specific models and purchase links, please see the attachment list of STM32 simple instrument accessories (for reference only).

4. The cost of this product is about 120 yuan.

5. Please search and watch the specific function demonstration video at Station B: "STM32 Simple Instrumentation"


7. Demonstration video

The video shows the test results of several common waveforms measured by a simple oscilloscope.