#The 7th Lichuang Electronic Competition# Based on N32G455 oscilloscope

Oscilloscope based on N32G455
An oscilloscope
circuit based on N32G455 is designed
to directly collect the sampled signal, which can save the heavy front-end circuit, but the measurement range of the oscilloscope will be reduced accordingly.
 
Type C interface is used as the power supply interface, which has good versatility.
AMS1117-3.3V chip is used as the chip power supply chip, which is cheap, stable and simple in the periphery.
LCD color screen is used, and the main control ST7735 has a relatively mature software configuration, which is convenient for user development.
TL431 is used as the voltage reference, and the peripheral circuit is used to program the voltage to supply it to the analog power pin of the microcontroller, so as to realize the high-precision and high-stability adjustable voltage reference, and effectively avoid the interference caused by power ripple.
Using N32G455 chip as the main control chip, it has a higher SRAM space so that it can better produce large-scale projects; and built-in DMA, which quickly and effectively transfers data to the LCD color screen output; and N32G455 adopts a more advanced RAM-M4 core, high performance and high specifications, to achieve high-precision ADC acquisition.
 
PCB design instructions
Use LiChuang EDA software to make the schematic PCB.
 
In order to obtain high-fidelity signals, use chip pins to directly sample, minimize line length, and use BNC interface to achieve low-interference signal input.
 
Note:
This circuit cannot collect signals above the reference voltage, which may burn the chip.