Excessive carbon monoxide automatic exhaust voice alarm circuit

Published:2011/8/30 2:46:00 Author:Christina | Keyword: Excessive carbon monoxide, automatic exhaust, voice, alarm circuit | From:SeekIC

As the figure shows, it is composed of the gas sensor, the solid-state language circuit, the monostable timing circuit, the SCR trigger exhaust fan circuit, the AC step-down rectifier circuit. It can be used in the room which burns the coal, when the coal is not fully burned, the harmful gas such as the carbon monoxide will exceed the standard, the circuit will open the exhaust fan automatically, and it will send out the voice of The carbon monoxide exceeds the standard, please be careful of the gas poisoning to ensure the personal safety.



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