farmland irrigation and drainage line anti-theft alarm(1)

Published:2011/7/20 5:01:00 Author:chopper | Keyword: farmland, irrigation and drainage line, anti-theft alarm | From:SeekIC

　This example describes the farmland irrigation and drainage line anti-theft alarm.It can send out the alarm in time and point out the relevant line which is cut off when the power lineis in the destruction, which played a role in anti-theft protection. 　　The principle of circuitThe farmland irrigation and drainage line anti-theft alarm circuit is formed by the detection circuit and sound alarm circuit, which is shown in Figure 4-93. 　　Detection circuit is formed by the resistors R1-R12, LEDs VL1-VL3, transistors V1-V6.



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