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din_kt
- 27th February 2008, 10:57
Dear all,

i want to sending dtmf signal to telephon line to access auto dialing, so can i use pic 16f84 then program using dtmf code (DTMFOUT PORTB.1,[10,0,5,8]), or need using pic 16f887. so how about circuit from pic to telephone line....need to add some component such transformer.

please help me.........urgent...
skimask
- 27th February 2008, 21:48
Dear all,
i want to sending dtmf signal to telephon line to access auto dialing, so can i use pic 16f84 then program using dtmf code (DTMFOUT PORTB.1,[10,0,5,8]), or need using pic 16f887. so how about circuit from pic to telephone line....need to add some component such transformer.
please help me.........urgent...

Sounds like a school project...

Google it! There's load of projects out there for connecting into a telephone circuit...and a LOT of warnings about doing so...

16F84/16F877? How about the 'A models of each of those? How many other PIC projects have you done so far?
din_kt
- 28th February 2008, 00:20
PIC 16f84A and 16f887A......i'm only familiar with this pic.
skimask
- 28th February 2008, 02:18
PIC 16f84A and 16f887A......i'm only familiar with this pic.

Ok...Refer to Post #2...

What did a Google search turn up?

What other things have you built with PICs so far using PicBasicPro?
Bruce
- 28th February 2008, 14:24
Here's a full schematic for a telephone interface complete with example code.
http://www.microengineeringlabs.com/doclist.htm#XT