Call Progress Tone Generator

[tlambertsen]

HI..

Is there any way to create the Call Progress Tone's in the pic?

I need the dial tone witch is the sum of 440Hz and 480Hz

There is a device from Clare (M-991) that does this, but is very hard to source in small qt.

Does any one have any suggestions?

Best Regards
Thomas

 

[blueroomelectronics]

PICBASIC Pro can generate touch tones if I recall.

 

[binzer]

HI..
Is there any way to create the Call Progress Tone's in the pic?
I need the dial tone witch is the sum of 440Hz and 480Hz
There is a device from Clare (M-991) that does this, but is very hard to source in small qt.
Does any one have any suggestions?
Best Regards
Thomas

Maybe check Com-Spec, I know they make low freq tone generators for ham and commercial radios, not sure if it will get to what freq you want but it's a shot.
Mike

 

[tlambertsen]

AT89C51 conversion

HI

Thanks for your replies....

By doing some research I found someone building a similar circuit using the Atmel AT89C51

Would It be possible to convert this design into use with a pic?

See attachment..

thanks

 

[Nigel Goodwin]

HI

Thanks for your replies....

By doing some research I found someone building a similar circuit using the Atmel AT89C51

Would It be possible to convert this design into use with a pic?

See attachment..

thanks

That appears to be using external gates as oscillators, so would work with anything.

 

[BeeBop]

HI..

Is there any way to create the Call Progress Tone's in the pic?

I need the dial tone witch is the sum of 440Hz and 480Hz

There is a device from Clare (M-991) that does this, but is very hard to source in small qt.

Does any one have any suggestions?

Best Regards
Thomas

I wonder if this is any help for you?

 

[atferrari]

One of the very first application notes for PICs was about DMTF using micros that today are considered obsolete. The theory and software there, is still valid.