need help on home security - Printable Version +- Free Academic Seminars And Projects Reports (https://easyreport.in) +-- Forum: Academic (https://easyreport.in/forumdisplay.php?fid=41) +--- Forum: Academic Queries (https://easyreport.in/forumdisplay.php?fid=60) +---- Forum: General Technical Request (https://easyreport.in/forumdisplay.php?fid=53) +---- Thread: need help on home security (/showthread.php?tid=306) |
need help on home security - shwetha - 08-16-2017 well i build an home security for my finel project on elec. i build it that whan ther is alart on some place it calling to some number that kept in the memory, and tell him what happen on the house. i got problems on connectin the calling system, this is my problems 1) what is the recommended DTMF dialer for this project and most easy to use? 2) how i connect the DTMF dialer to the RJ9? ( we got only 2 cabels in our contry not 4, so only mic and sound i guess ) 3) are all the contres got telephone standard or all contry got her own standard? and what pass on the phone line? are this some kind of modulation? 4) how can i know when some one answer the phone? 5) how i connect the voice chipe to the RJ9 ? how voice move on the phone line? tnx for all answers, sorry if i got bad eng ( not my lang ) need help on home security - riyarose - 08-16-2017 i suggest you to read http://eet.etec.wwu.edu/wanl2/project/docs/Hardware%20Description.pdf may be Dtmf Decoder 1610 Am a simple one to use as |