#Training Camp# Super Mini Simple Digital Oscilloscope

I. Project Introduction
[1] This project replicates the official engineering case of the LCSC training camp's simplified digital oscilloscope. The schematic diagram is modified based on the official one, the PCB layout is rearranged, and a shell design is added.
II. Design Summary
[1] The board adopts a USB/3.7V lithium battery dual power supply system, which can be powered by a type-c or a single lithium battery. PMOS and diodes are used to achieve automatic power switching. When the type-c data cable is inserted, the diode is turned on and the PMOS is turned off. At this time, the system is powered by USB, and the lithium battery is charged through TP4056. When the USB is unplugged, the PMOS is turned on and the system is powered by the lithium battery.
[2] The main controller is replaced with CW32F030C8T6. The minimum system circuit of MCU is added, and the reset button, BOOT selection interface, serial port download interface, and SWD debugging interface are brought out.
[3] The system power supply is provided by the PW5100-50 boost converter through USB/lithium battery to provide 5V, and 5V is output to AMS1117 to output 3.3V.
[4] To achieve a small size, the screen module recommended in the case was not used. Instead, a 1.8-inch TFT bare screen was adopted. The main control board integrates the driver peripheral circuit and is connected through a 14-pin ribbon cable socket.
[5] The rest of the circuits are designed with reference to the official case.
[6] The program is burned using the hex file generated by compiling the CW32 version source code provided in the official case.
III. Physical Display
[1] PCB soldering physical object
[2] Assembled finished product
 
ps: The display video is attached. For more detailed demonstration content, please watch it on Bilibili:
https://www.bilibili.com/video/BV1sx421U7Fm/?vd_source=230a20c5a5b53f6b192028c53d8b5d3c#reply215232541424