在电源输入的前端利用旁路去耦电容滤波器，在+12V输入时，首先通过一个电解电容C1和电容C2保证电压的输入稳定，之后选择利用稳压器NCP1117ST50T3G将输出电压降到+5V，如图3.5所示，其输出电流为1A。在稳压器之后继续采用一个电解电容C3来保证输入到芯片的供电电压稳定。-Power input at the front end of the use of bypass decoupling capacitor filter when+12V input through a first

由于RS232的电平与Arduino Mega 2560的接口电平不能兼容，所以就需要进行电平的转换，即进行串口转换模块的设计，本文选择利用ATMEGA16U2-MU模块来做电平转换，将上位机的指令通过此模块发给下位机-Since the RS232 level is not compatible with the Arduino Mega 2560 interface level, so we need to level conversion, that is designed to seri

NYGNNQ的PCB和SCH文件，RF模块选择用低成本的NRF24L01，mcu选择用国产的单片机stc15w401as和stc15w408s，-NYGNNQ PCB and SCH files, RF module selection with low-cost NRF24L01, mcu choose to use the domestic single-chip stc15w401as and stc15w408s,