情境
A highway monitoring station needs to detect vehicle speed between two infrared sensor pairs and display it on an LCD.
這張圖裡有什麼
看懂背後的決策。
01
Use IR sensor pairs 1 and 2 to capture entry and exit time
02
Use AT89S52 to compute speed from the sensor time difference
03
Use I2C LCD for clean readout and 7805 regulator for stable 5V
Reuse when designing a microcontroller-based highway speed checker or similar time-of-flight sensor projects.