the circuit of the animal littering announcer (1)

Published:2011/6/28 6:06:00 Author:Ariel Wang | Keyword: animal baby, announcer | From:SeekIC

When the animals have babies,the resistence between two crossed electrodes of the comb-like sensor become small.V1 is saturated to conduct.VL is lighted.The +3V voltage is current limited by R2.It is connected with VL and V2 in series.And it is regulated by them.Then it provides IC and the high frequency oscillator (consists of R3,R3,C4～C8,L1 and V2) 1.6～1.7V DC working voltage.IC outputs the acoustics signal.It is modulated by the high frequency oscillator.And it is power amplified by V2.Then it is emitted by antennas W to the sky.The feeder can recieve the alarm signal of having animal babies by FM in a distance.



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