Introduction - If you have any usage issues, please Google them yourself
Volume in this experiment we will test people' s reaction time, because people' s reaction time is far longer than the built-in multi-CLOCK cycle, and therefore the frequency of CLOCK to do except be applicable to the action, and facilitate in the total number of device Computing and seven-segment display rendering. Test content, when you see LED Leung from time to time, to respond immediately to stop the total number of devices and demonstrate the total number of devices was the time. Total number of devices with two-bit number of BCD counter future to achieve the results shown in the seven-segment display.