基于 AT89S52 单片机的人体反应速度测试仪s实现功能如下： 1.按下“开始”按钮，灯亮，按钮一直保持按下状态。 2.灯持续点亮一段随机时间，然后熄灭，灯熄灭时人松开按钮。 3.计算灯熄灭的时间和按钮被松开的时间之差，显示出来。 4.若测试者在灯熄灭之前松开按钮，则显示出错信息。-AT89S52 microcontroller-based human reaction speed tester s achieve the following functions: 1. Press the　Start　button, the lights, the button remains pressed. 2. lit continuously for a random time, then off, release the button when the light turns off people. 3. Calculate the difference between the time the lights go out and the button is released the time, displayed. 4. If the tester lights off before you release the button, the error message is displayed.