dtmf decoder

[balwinder124]

i want to interface a dtmf decoder with 8051 for controlling two stepper motors from a mobile. plese send me the circuit diagram as soon as possible. my email id is

balwinder124@gmail.com

 

[rushi53]

i want to interface a dtmf decoder with 8051 for controlling two stepper motors from a mobile. plese send me the circuit diagram as soon as possible. my email id is

balwinder124@gmail.com

I have done this project before 2 years.
It is very simple.
But sorry to say, I don't have circuit diagram of this.

But its very simple, 4 pins of DTMF decoder goes to microcontroller.
Thats all.


you can go through datasheet of DTMF decoder for rest connection

Let me know if you need any more help.

 

[john.l]

can you please tell me the name of dtmf decoder???
I mean IC number........
please........... waiting for your reply.........

 

[rushi53]

can you please tell me the name of dtmf decoder??

DTMF Decoder - MT8870
DTMF Encoder - UM91215B

 

[john.l]

thanks for the information,
do i need to use both ?
I mean encoder and decoder ?

 

[rushi53]

thanks for the information,
do i need to use both ?
I mean encoder and decoder ?

that purely depends on your application
encoder is exactly reverse to decoder
which means it takes BCD as an input and generate DTMF tone at its output..

 

[mytech]

I guess, since your controlling through mobile,
The mobile will give you DTMF tone via its eraphone out, hence you dont need of DTMF encoder.

 

[p55xp]

i want to interface a dtmf decoder with 8051 for controlling two stepper motors from a mobile. plese send me the circuit diagram as soon as possible. my email id is

balwinder124@gmail.com

Your mail id is unnecessary in a forum post.
How do you like to encode before you decode it. Is it from an encoder or mobile itself?

balwinder124 is silent for a long time, probably he has found the solution, so he is busy on doing it

 

[masmy]

u may do lake this...............

Projects of 8051 - AVR, Microcontroller projects - Electronics projects