Optical Coupling Phone Anti-theft Device Circuit

Published:2011/6/3 12:09:00 Author:Michel | Keyword: Optical Coupling, Phone Anti-theft Device Circuit | From:SeekIC

This transponder will tell your place or contact number to your friend when you friend calls you and you are outside.This transponder is safe and reliable and it will not be disturbed by busy signal. Work's Principle The optical coupling phone answer circuit is showed as the pictureThe SRG10A is 10S audio record circuit.Please press SB2 to switch on the power.What you want to tell your friend will be recorded via carried in electret microphone(this is not be drawn in the picture) Please press SB1 when you go out.When it's static state, the clad pipe's collector voltage composed of VT1 and VT2 is around 0.65V and both VL and VT3 are off.



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