hi guys
guys i'm still w8ing for anyone's reply

kindly suggest me any solution

if someone have circuit diagram or project report it's my humble request to send that material on my id that is [email protected]

Thanks

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Abstract:

The project is designed on the DTMF decoding. Our modern telephone and even our mobile phone uses DTMF coding for number dialing. These DTMF codes can be decoded and utilised for useful purposes. The circuit utilizes IC8870 for DTMF decoding. Microcontroller 89C51 reads these codes and takes necessary action. Door latch can be opened by entering the correct password; we can also connect security sensors of our choice. In case of any breach of security, the device will dial out the pre-stored number and deliver an emer..............etc

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Dear friend i m doing my project that is Gsm controlled door latch opener with security dial-up with changeable numbers
so in short i need your help if you or any one have some helping material such as circuit diagram, Final project report, or any material related to that topic plz send me that material or page link from which i get it
i'll be very thankful to you all

here is my e-mail id : omer_waheed7hotmail.com

Best Regards

Reference: http://studentbank.in/report-gsm-controlled-door-latch-opener-with-security-autodial#ixzz1..............etc

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Hi there......
I am new to this website. I am a final year electrical engineering student searching for project i found this topic GSM CONTROLLED DOOR LATCH OPENER WITH SECURITY DIALUP WITH CHANGEABLE TELEPHONE NUMBERS very interesting since i am new to this website i am unable to see the contents of it can you guys help me on this ..............etc

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Hello Sir ...
i want to know about 70. GSM CONTROLLED DOOR LATCH OPENER WITH SECURITY DIALUP WITH CHANGEABLE TELEPHONE NUMBERS (BASED)
please send me all detail with circuit diagram ...
my email id: [email protected]
thx ..................etc

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Cell Phone Controlled Door Latch

Cell Phone Controlled Door Latch

I’ve been reading a lot on how DTMF (Dual Tone Multi Frequency) tones work over the last couple of weeks. I’m sure you’ve noticed that when you press the keys on a standard telephone keypad, an audible ‘beep’ is generated. These beeps are actually the combination of two distinct frequencies. For example, the tone you hear when you press the number ‘9’ on a telephone, is actually a combination of a 1447 Hz and 852 Hz signal. In a tel..............etc

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I want Analysis & Design of Bistable multivibrator using transistor ppts, Analysis & Design of Astable multivibrator ppts, Analysis & Design of Monostable multivibrator ppts..............etc

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i want ppt. of bistable multivibrator using transistor...............etc

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please upload a project report on bistable multivibrator..................etc

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HELLO,
SIR IAM SANDHYA pursuing b.tech final year in eee
i want the paper ,circuit,source code ,all the informationabout the project...............etc

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