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member_tdh
Joined: 06 Feb 2006
Posts: 81
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 02 Oct 2008 15:58 Telephone Line |
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Hi!
I'm making Telephone Line project with some components: HM9102 (dialer), TEA1062 (Microphone interfacing), LS1240A (Buzzer).
My problem is: I can't hear any signal from Microphone!
Could anybody have ideas...??? Pls help me!?! 
Line --> Buzzer -->earphone.....ok!!!
Mic --> Line --> can't hear...!!! ERROR!
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bobcat1
Joined: 10 Jul 2002
Posts: 878
Helped: 32
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| 04 Oct 2008 7:54 Re: Telephone Line |
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HI
This is a difficult to solve probelm !!!!
First you must learn how the analog phone line works - seasrch google to know how
Then you will need to know how to use hybird audio circuit with analog phone circuit - this might help you debuging your audio problem
All the best
Bobi
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pranam77
Joined: 22 Apr 2008
Posts: 115
Helped: 8
Location: The heaven
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| 04 Oct 2008 12:09 Re: Telephone Line |
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| The condensor mic has a polarity. See wether it is connected the right way. Also see you get a voltage more than 2 volts at the + tive pin of the MIC. See the capacitor connected to the mic is OK. If this does'nt work, Please post the schematic here. We'll try to solve the problem. Hope this HELPS. Good luck.
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