Description:
As shown by the gas sensor alarm QM, buck rectifier and regulator circuits, integrated circuits KD28, speaker Y and so on. QM gas sensor for the QM-N5 type. Step-down transformer rectifier and regulator circuit consists of B, the bridge's rectifier D1 ~ D4, C1, C2, integrated voltage regulator 7806 and so on.
Work, adjustment potentiometer W, the power for 1 minute. When the air is clean, QM corresponds to a larger resistance value, W the partial pressure is small, so that the KD28 reset the alarm does not occur. When a combustible gas when contact with QM, QM corresponds to the resistance value is small, W partial pressure on the larger, so KD28 set, the 3 foot high output speaker to promote the work of an alarm signal. Gas left the circuit will resume normal operation.
As shown by the gas sensor alarm QM, buck rectifier and regulator circuits, integrated circuits KD28, speaker Y and so on. QM gas sensor for the QM-N5 type. Step-down transformer rectifier and regulator circuit consists of B, the bridge's rectifier D1 ~ D4, C1, C2, integrated voltage regulator 7806 and so on.
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Suppose, you are out of home or sleeping, the fires, leak of gases, congest of CO or any other environmental hazard may come any way. Integrated alarms or sensor can make you alert very soon.
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