Fuel tank oiling liquid level automatic control circuit with frogs sound

Published:2012/9/20 21:30:00 Author:Ecco | Keyword: Fuel tank, oiling liquid level, automatic control , frogs sound | From:SeekIC

As shown in figure, the circuit is composed of optocoupler, relay control solenoid valve circuit, frogs calling circuit and AC buck rectifier circuit and other components. Typically, the side wall of the tank has a glass tube to display liquid level. If a photocoupler is mounted on the tube ( Figure b ), and it can be moved up and down on the tube, it can achieve the automatic control liquid level of oil filling. When the liquid level reaches the set height, it can also issue frog sound.



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