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Cellphone-Based Device Control With Voice Acknowledgement problem

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sribangaram

sribangaram

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Dear Friends I am doing cell phone based device controller LINK- **broken link removed** This one every thing working but my problem dtmf side only "MT8870" not decoding what is my problem I didn't under stand Please tell me :x
 

Yes It's working but another problem is came DTMF decoding is perfectly all right but only 4th relay is working another relay's are not switching on I think that problem is in program Please check the program
 
I too have same problem with the same circuit.
Sometimes only 4th relay works others no!

Decoder Output is not proper , that means Decoder circuit has some problem . No problem with program i think .
 
Last edited:

Dear friend sorry for late:sad: Actually that circuit was not working properly that's why I have to don another circuit But decoder out put is working perfectly alright you are saying decoder out put is not good
That's wrong
which mobile you are using

C12 100nF (0,1uF)
R6 6,8K-10K
R7 100K
R5 330K
try to change like this may be any Nokia mobile will support it
 
Thanks for reply . I'm using Nokia N79 . Now I'll do the changes and try again for DTMF side , that circuit was EFY TESTED , is it problem with code or hardware ? . Can you please share the another circuit which you made . Thanks
 

Where you stuck where is problem ?

- - - Updated - - -

If you need, I can give you some better project.
 

Author is António Sérgio Sena.

New web address of author site is :

**broken link removed**

Remote control using DTMF (With access (3-digit v1.0, 4-digit V1.1) password to system, and each channel have yours (3-digit v1.0, 4-digit v1.1) password for on/off):

There is Version 1.0 (PIC16F84 and PIC16F628 - picture on left) and Version 1.1 (PIC16F628 - picture on right) :

Picture v.1.0.jpg Picture v1.1.jpg


Circuit V1.0 (version 1.1 is in PDFs) :

Version 1.0.jpg


Inside is PCB, HEX and source in ASM for both versions.

Use Google Translator to translate from portuguese to english.

This can be used for anything, you can make FM remote control, just make small FM receiver before input of DTMF decoder, or use it with mobile phone.


You can use this online PDF to Word converter, then you can copy/paste text from pdf file to some language translator.
http://www.pdftowordconverter.net/

or

if you know portuguese you dont need this at all. :smile:
 

Attachments

  • Controlador_DTMF_v1.0___16F628.zip
    176.2 KB · Views: 109
  • Controlador_DTMF_V1.1.zip
    688.9 KB · Views: 117
  • Controlador_DTMF_V1.0___16F84.zip
    177 KB · Views: 99
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actually i am also faing the same problem....
can u pls tell what is "R6 6,8K-10K". is it 6.8k-10k????
 

thank you sir, and m also having a problem in speaker....circuit is recording properly but when i switch off the SPDT switch for playback, the speaker is not responding. according to the electronicsforu LED 2 flashes when you are recording something. my problem is, at the playback side LED 2 flashes but there is no response from the speaker. please help
 

guptasura91 said:
thank you sir, and m also having a problem in speaker....circuit is recording properly but when i switch off the SPDT switch for playback, the speaker is not responding. according to the electronicsforu LED 2 flashes when you are recording something. my problem is, at the playback side LED 2 flashes but there is no response from the speaker. please help
Click to expand...

Can you be more specific, I didnt understand, and on what circuit you mean.


Best regards,
Peter
 

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