Design of Taximeter System Based on AT89S51 SCM

The design takes the SCM of AT89551 as the core component and is with additional A44E hall sensor distance to realize the taximeter statistics.The unit price and system time information are saved when the system power-down by AT24C02,and the output adopts the 8-segment digital display tube.The taximeter designed by this circuit can not only realize the basic valuation,but also adjust the unit price according to day,night and halfway to wait,at the same time the taximeter also can as a clock to provide convenience for the drivers comrades when it's not denominated.