| Author |
Message |
yahaa
Joined: 09 Oct 2005
Posts: 36
|
 23 Jan 2007 10:35 celphone dtmf |
|
|
|
|
how do i decode the dtmf tones in a cellphone??
i found many circuits on net where one can decode telephone dtmf tones using 8870 ....in using the same ic to decode cellphone dtmf ..does it require any change in the circuit???
circuit link: www.electronicsforu.com/EFYLinux/circuit/jun2003/CI-2-DTMF.pdf
can i use the same circuit???
|
|
| Back to top |
|
 |
buntheun
Joined: 20 Dec 2006
Posts: 78
Helped: 6
Location: Cambodia
|
| 23 Jan 2007 13:03 Re: celphone dtmf |
|
|
|
|
| http://www.edn.com/archives/1994/101394/graph/21di5fg1.htm
|
|
| Back to top |
|
|
budhy
Joined: 21 Oct 2006
Posts: 837
Helped: 185
Location: Indonesia
|
| 23 Jan 2007 14:17 Re: celphone dtmf |
|
|
|
|
| Quote: |
| how do i decode the dtmf tones in a cellphone?? |
There are no DTMF tone in a cellphone!
|
|
| Back to top |
|
|
yahaa
Joined: 09 Oct 2005
Posts: 36
|
| 24 Jan 2007 18:14 Re: celphone dtmf |
|
|
|
|
cell phones can produce dtmf tones...once connection has been established
thats what i read somewhere
|
|
| Back to top |
|
|
fiberdriver
Joined: 31 Jan 2007
Posts: 2
|
| 31 Jan 2007 0:43 celphone dtmf |
|
|
|
|
sounds like what you need is a simple dtmf decoder. schematic and info can be found at
http://www.bobblick.com/techref/projects/tonedec/tonedec.html
yes a cell phone can generate dtmf and receive it as well.
john
|
|
| Back to top |
|
|
