High speed warning device


Posted on Jan 19, 2013

A1 amplifies and regulates the signal from the spark coil. A2 converts frequency to voltage so that its output is a voltage proportional to engine rpm. A3 compares the tachometer voltage with the reference voltage and turns on the output transistor at the set speed


High speed warning device
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Amplifier A4 is used to generate an audible tone whenever the set speed is exceeded.




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