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Standalone telephone dialer for burglar alarm

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hassan1980

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Did anyone build a standalone telephone dialer for burglar alarm without using computer.
 

telephone dialer+schematic+alarm-patentstorm

I builded with HT9200(Holtek) and a QY4(freescale) - it's very easy.
Edson

Added after 3 hours 5 minutes:

Hi Hassan
This schematic was make by tango II dos, because the project is very old.
Edson
 

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    hassan1980

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telephone dialer alarm schematic

u can do it using DTMF transceiver IC CM8880 or CM8888
 

standalone telephone dialer

see this shematic

66_1158699455.gif


Added after 49 seconds:

66_1158699455.gif


Added after 5 minutes:

see this site . too.

**broken link removed**
 

telephone dialer ic

Please - **broken link removed**
 

Re: Telephone dialer

in which way u vant this
handle or with microcontroler
 

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