Motorcycle Speed Indicator (3)

Published:2011/7/9 6:31:00 Author:Sue | Keyword: Motorcycle, Speed Indicator | From:SeekIC

The voltage which is generated by alternator will be put on LED VL1-VL8's positive electrode which will serve as display working power after it is limited by R1, rectificated by VD, filtrated by C1. One circuit will provide the operational amplifier N1-N8's inverting input terminals with sampling voltage after it is voltage divided by R2,R3. The other circuit will provide IC2,IC3 with working voltage after it is stablized by IC1. The +9v voltage also provide N1-N8's voltage input terminals with base voltage after it is voltage divided by RP1,R4-R10,RP2. The motorcycle's speedis proportionate tothe alternator's speed of rotation, that is when the motorcycle runs fast, the alternator's output voltage is high, and there will be many VL1-VL8's illuminated LEDs. When the device is used, the driver can adjusting the speed by monitoring the numbers and extent of the illuminations, so the safety can be ensured.



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