【正文】 ............. 5 1. 油壓檢測電路 ....................................................................................................... 5 2. 油溫 檢測電路 ....................................................................................................... 6 3. A/D 接口電路 ........................................................................................................ 7 4. 單片機擴展電路 ................................................................................................... 8 5. 鍵盤接口電路 ...................................................................................................... 8 6. LED顯示接口電路 ................................................................................................ 9 7. 報警電路 ............................................................................................................ 10 8. 電源電路 ............................................................................................................ 10 五． 電路原理圖及 PCB 圖 .............................................................................................11 .................................................................