实用低频功率放大器原理图和PCB图文件，包含PDF和Altium designer 完整工程源文件.可用于毕设等-Practical low-frequency power amplifier schematic and PCB image files, including PDF and Altium designer complete project source files.

毕设时候用的自动浇水系统的仿真程序,是基于单片机的-Simulation program complete set of automatic watering systems