automatic telephone dialer when triggered

[pravardhan]

Hi people, i want a automatic telephone dialer when triggered circuit diagram. Using a microcontroller is best suited and should have a minimum of 2 trigger inputs.

Thanks in advance,
PRAVARDHAN

 

[al37]

Hello,

If you want use uC.

Why don't you see in the web site from microchip the AN257.pdf document (for decoding with information for coding technology) and see this link https://ww1.microchip.com/downloads/en/AppNotes/00543c.pdf

Be carefull, must use the AN543 as help not for futur project (not sure for your design, the tone aren't clearly on the dial tone in a few time).

Al

 

[pico]

Microchip's Application notes

**broken link removed**

 

[pravardhan]

Thank you people.

But, I have another idea. How about connecting the programmed microcontroller to the telephone buttons and the receiver hook as if some is dialing a number.

But, i don't know how to connect it to the telephone may be like using relays or diodes?