Automatical opening and stopping control circuit of fish tank water pump

Published:2012/12/3 21:44:00 Author:Ecco | Keyword: Automatical opening , stopping control , fish tank , water pump | From:SeekIC

It uses two 555 -based circuits. Its peripheral circuits have a similar structure, and the closed loop is formed by cross- connected capacitors C5 , C3. The device running has two states: working state and intermittent state. In order to guarantee the device's working condition, R3 and C2 form a reset circuit on IC1's 4 feet. This circuit smallest intermittent is half of an hour, and the maximum intermittent is 3h. According tohe R10 values ​​given in Figure, the pump working time is 25min ~ 30min.



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