Published:2011/6/30 7:42:00 Author:Ariel Wang | Keyword: alarm , water break , spray pipe , seeding-machine | From:SeekIC
The water break detected circuit consists of switch integrated circuit IC1~IC3 and the resistor RI~R3。The ends of A~C are connected with water spray pipes of three circuits.When any water spray pipe is blocked,the pin-5 of the electronic switch integrated circuit becomes high level.The electronic switch inside is connected and conducted.The LED is lighted.It indicates how many the blocked water sprays are.At the same time,the audio oscillator circuit works.BL gives out alarm sound.For example,the water spray pipe in circuit A is blocked,there is no water spraying out from the sprayer.The electronic switch inside IC1 is conducted.VL1 is lighted.V1 and V2 are conducted to work.BL gives out the alarm sound.
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