大学毕业设计作品：出租车计价器的设计：以AT89S52单片机为中心，通过金属传感器来测距，实现对出租车的计价统计。结合语音芯片ISD4004，时钟芯片DS1302，功放模块LM386N组成语音时间控制系统，最后通过液晶显示模块LCD12864显示单价、路程、总价、时间等。本系统可以实现单价、起步价、白天价、夜间价的显示和时间的修改。AT89S52通过P0口与外部语音报价电路相连，可以实现语音报价功能。,Graduated from college design work: the design

基于51单片机系统的出租车计价器程序，实现在白天和晚上不同的计价，并且有里程数和堵车时间的计价-Based on 51 single-chip microcomputer system Taximeter procedures, to achieve in the daytime and at night different pricing, and mileage and time congestion pricing

采样电压值用来片段是白天还是黑夜~~~~电池过充还是过放-according to the change of the voltage,the system will juge whether the day is in the daytime or not.

用stc12c5402做的日行灯模块，带电压探测，当亮大灯时日行灯只亮一半，打转向灯时闪亮。经装车测试，效果很好。-With stc12c5402 do Daytime Running Light module with voltage detection, bright headlights lit only half the time running lights, steering play flashes. After loading tests, the effect is very