A humidity/frequency-audio decoding humidity detection, automatic exhaust ventilation croak sound circuit

Published:2011/8/26 2:05:00 Author:Jessie | Keyword: humidity/frequency, audio decoding humidity detection, automatic exhaust ventilation | From:SeekIC

The circuit is shown as the chart, it is composedof wet sensors, time-based oscillator, audio decoder, SCR control exhaust fan circuit, croak sound circuit and AC step-down rectifier circuit, etc. Only when environment humidity reaches a set humidity value, audio decoderwill output signal of control fan start toundertake ventilated dehumidification, it also emits several croak sound to remind consumer's attention.



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