DTMF is 1970's (or earlier?) technology, it hasn't been used for years now in anything new - no one is going to make an IC that's long obselete and no one wants.
A microcontroller, a Keeloq one would be a good bet. It's what they use in the automotive industry, my car has a Keeloq PIC in the key.
Like I said, if its for your final University project then pick a subject you know if you want any chance of finishing it on time.
DTMF is for telephones and 1970 security systems.
Actually not for telephone dialing.. say
To control 10 doors using 4 digit passwords(wireless) i decided via dtmf to open and close... if you hav any other idea let me know..
Actually not for telephone dialing.. say
To control 10 doors using 4 digit passwords(wireless) i decided via dtmf to open and close... if you hav any other idea let me know..
Sorry not yet built any circuit using microcontroller..
I am on it.. right now started studying it.. thats why i asked available ICs..
Can you tell me little more about keeloq.. thanks
Two months to design and submit your design, with no prior microcontroller experience. No real idea either, you're still in the planning / concept stage.
Did you read the Keeloq documents on Microchips site, or try google "keeloq"?
We don't know where you're located, can you readily buy components?
Thanks for you kind reply,
Actually we already planned everything..
And i have experienced with some ICs but not with pic..
Like i have done lots of mini projects..
This time for DTMF i thought of using KT8870 and UM91214B..
I asked any other better ICs for this application...
I know pic is a perfect solution, but i hav little afraid bec. i hav to submit within 2 months.. And For me not necessary to complete project using pic... Due to these reasons only i asked available ICs..