Agricultural Automatic Water Feeder (9)

Published:2011/5/22 20:13:00 Author:Sue | Keyword: Agricultural, Automatic, Water Feeder | From:SeekIC

When the multivibrator begins to work, IC2's 3 pin outputs oscillator signals. When the level is lower than b, IC3's 2 pin has high level and 3 pin has low level. K is connected and K1 is connected. M begins to work. K's K2 is disconnected. When the level is between a and b, but lower than c, K2 is disconnected and IC3's 2 pin has high level. M is still working. When the level is higher than c, IC2's 3 pin will output low level pulse, which will be put on to 2 pin. 3 pin becomes high level and K is released. K1 is disconnected and M stops working. When the level is between a and b, K2 is disconnected and M doesn't work. When the level is lower than a,b, IC3's 2 pin becomes high level and 3 pin has low level. M begins to work again.



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