The Children lost warning devices NE555 and TDA7000

Published:2011/6/14 2:50:00 Author:TaoXi | Keyword: Children lost, warning device | From:SeekIC

The FM transmitter circuit has two parts: the low frequency modulation oscillator and the carrier frequency oscillator transmitter circuit, as the figure (a) shown. The receiving circuit is as shown in figure (b).



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