通过并口转8位模拟，经过三极管放大驱动激光管，并监控电压电流和激光管pd脚反馈信息，可通过2.8寸屏幕控制，仅供学习使用不可商用，有不足之处望指出互相学习。(Through parallel port to 8-bit simulation, the laser tube is driven by triode amplification, and the voltage, current and PD pin feedback information of laser tube are monitored, which can be controlled through 2.8-inch screen)