Engine Water Supply Alarm Two

Published:2011/7/7 3:21:00 Author:Felicity | Keyword: Engine Water Supply Alarm | From:SeekIC

While the water level of the tank is higher than the lowest water level, the water level detect electrode is connected to ground through the resistance of water. V1 is on because of low level voltage of the base, and the high level voltage output by collector is divide by R3 ,R4 and then connect to the base of V2 to make V2 saturated and on and then K is on and the normally off contact of K is off ,then HA is noiseless and VL is off.While the water level in the tank is lower than the lowest water level , the water level detect electrode is above water to make V1 and V2 cut off, and K releases, HA is on and send out alarm, HL is on to warn the driver that the water level of tank is too low and should refill it



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