the circuit of heat alarm for rice seedbed

Published:2011/6/14 7:05:00 Author:Ariel Wang | Keyword: heat, alarm, rice, seedbed | From:SeekIC

the working principle of circuitWhen the rice seedling has two leaves and one needle,you can put the transfer switch to the position of 2 .At this time,the temperature of the alarm is 27℃.When the temperature of the shed is below 27℃,the oscillator doesn't work.BL doesn't give a sound.When the temperature reaches or goes beyond 27℃,the oscillator works.BL gives the alarm sound.When the rice seedling has three leaves and one needle,you can put S to the position of 1 .When the temperature of the shed is lower than 26℃,BL doesn't give a sound.When it's higher than 26℃,it gives the alarm sound.



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