Automobile Fuel Supply Indicator

Published:2011/7/10 7:32:00 Author:Sue | Keyword: Automobile, Fuel Supply, Indicator | From:SeekIC

The automobile's storage battery's +12v voltage will output +5v voltage from V's emitting electrode after it is filtrated by L,C2, adjusted by V, stablized by VS2. The voltage will provide the pulse oscillator, counter, LED indicator circuit with working voltage. The detecting pulse which is output by the oil pressure sensor will be put on IC2's pin 3 and IC3's pin 14 through the level converter. When the input detecting pulse signal has low level, R4's voltage is lower than 0.4 v. When the input pulse signal has high level, R4's voltage reaches 2.7V. After the pulse oscillator begins to work, it will provide IC2 with count pulse signal with a frequency of 500Hz.



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