Storehouse humidity detection and automatic ventilating air exhausting device circuit(MS01-A)

Published:2011/4/20 20:54:00 Author:Nicole | Keyword: storehouse, humidity detection, automatic ventilating, air exhausting device | From:SeekIC

The circuit is as shown, it is composed of precise time base oscillator, D trigger, temperature detection circuit, comparison circuit, relay control ventilating circuit, language admonishment circuit and AC depressurization rectifier circuit. BC adopts the crystal in silica watch, its natural frequency is 32768Hz; K1 adopts JZC-22F; C6, C7 adopt CD11-16V electrolytic capacitor; R10 adopts RJ-2W-820kΩ, RP1 adopts WH5 synthetic film potentiometer, the other resistances all adopt RT-1/8W carbon-film potentiometer; C8 uses CBB-400V-0.75μF; VC uses 1A/400V full bridge rectifier module or four 1N4004 to build a bridge rectifier; B uses 0.25W(8Ω) electricity-powered loudspeaker.



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