DTMF and PIC 16F628A

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  1. - 23rd April 2010, 21:31 #1
    ultramegaok's Avatar
    ultramegaok
    ultramegaok is offline Junior Member
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    Question DTMF and PIC 16F628A

    Hi
    I'm really new with DTMF staff and I have been trying to dial a number throught the telephone line, I had tried differents circuits but not one has work succesfully, with the one attached sometimes I have a response from the central but not able to complete the call never.... I'm using PBP with a 16F628A PIC @ 4MHz. any help what am I doing wrong??? Somebody has completed successfully this project with those components???. Is the pic able to give a clear DTMF tone or I have to implement something else besides what the PBP manual shows??
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