Introduction - If you have any usage issues, please Google them yourself
Function description of the project:
(1) Using the button set the time by yourself
(2) set the length with the button by yourself
(3) automatic counting by infrared induction;
(4) digital tube real-time display count
(5) buzzer prompt when counting
(6) automatically calculate the number of half cycles
(7) automatic calculation cycle;
(8) automatic calculation of gravity acceleration;
(9) liquid crystal display period, half cycle number and acceleration of gravity;