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Motorcycle Speed Indicator (1)

2016-09-01 15:18  
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Motorcycle Speed Indicator (1)
The alternator's output voltage V(It is achieved from ac voltage output from the alternator's head lamp's supply winding) will be divided into two circuits after it is rectificated by VD, filtrated by C. One circuit will provide IC2,IC1 and VL1-VL8 with 9v voltage after it is limited by R9, stablized by VS. The other circuit will generate 8 different detect voltage on A-H terminals after it is voltage divided by the voltage division circuit. When one terminal's detect voltage reaches NOT GATE circuit's threshold level, the NOT GATE circuit will output low level, which will make its output terminals outside circuit's diodes illuminated. The motorcycle rider can get to know the current motorcycle speed by the number and standard of illuminated diodes.