Discussion in "General help Guidance and Discussion" started by    nils_ec    Mar 21, 2012.
Wed Mar 21 2012, 01:07 PM
#1
Dear All,

How to take a DTMF o/p through mobile headphone pin. There are two or three connections. One is left spk, 2nd is right spkr, where to connect to get DTMF o/p.
Plz help me, i m confused for this silly ques.
Mr.Bhargav --plz reply ASAP, u know this.
Ultimately . i m making land rover robo using cellphone, but not getting dtmf output from headphone pin or what will be d o/p. plz helppppppp.
Regards,
Nilesh


[ Edited Wed Mar 21 2012, 01:12 PM ]
Fri Mar 23 2012, 11:53 AM
#2


Dear All,

How to take a DTMF o/p through mobile headphone pin. There are two or three connections. One is left spk, 2nd is right spkr, where to connect to get DTMF o/p.
Plz help me, i m confused for this silly ques.
Mr.Bhargav --plz reply ASAP, u know this.
Ultimately . i m making land rover robo using cellphone, but not getting dtmf output from headphone pin or what will be d o/p. plz helppppppp.
Regards,
Nilesh

nils_ec


i have worked on this project and also have submited my work to this site
only u have to do is to use any one side of the headphones either Left or right any one
then simply connect it to the 8870 DTMF decoder
MAKE SURE THAT THE TOUCH TONE VOLUME IS FULL AND THE JACK IS CONNECTED TO PHONE INDICATING ON CELL THAT THE PHONE IS ENTERED IN A HEADSET MODE
use a simple mobile for the project like 1100 which is ideal cell for this type of projects


[ Edited Fri Mar 23 2012, 11:56 AM ]
Sat Mar 24 2012, 07:14 PM
#3
Dear Nilesh,
I am attaching the complete circuit diagram with 8870 DTMF and PIC microcontroller. I have also mentioned the jack pin with label. You can connect any nokia phones like 2100,3210,3330,3410,3510,5210,6600,7650,8210,8310,8850 and so on. Hope your problem will be solved easily.
Regards
Abdul

 thedung like this.
Wed Mar 28 2012, 06:02 AM
#4
Thank you frnd... it works...
Tue Jun 05 2012, 10:38 AM
#5
How cud we detect the dtmf from touch screen phones..its nt giving sufficient voltage thru headphone output..
Tue Jun 05 2012, 03:33 PM
#6


How cud we detect the dtmf from touch screen phones..its nt giving sufficient voltage thru headphone output..

Robowaala


MAKE SURE THAT THE TOUCH TONE VOLUME IS FULL AND THE JACK IS CONNECTED TO PHONE INDICATING ON CELL THAT THE PHONE IS ENTERED IN A HEADSET MODE
 Robowaala like this.
Wed Dec 05 2012, 06:55 AM
#7


Dear Nilesh,
I am attaching the complete circuit diagram with 8870 DTMF and PIC microcontroller. I have also mentioned the jack pin with label. You can connect any nokia phones like 2100,3210,3330,3410,3510,5210,6600,7650,8210,8310,8850 and so on. Hope your problem will be solved easily.
Regards
Abdul



rezferten


if we connect direct from headphone to ic mt8870,maybe the signal too tiny?i making te samme circuit in datasheet of mt8870 but it not working,plz hellpppppppppppp!
Wed Dec 05 2012, 08:58 AM
#8
thedung, create a thread for yourself. Dont open old threads.
Thu Dec 06 2012, 11:14 AM
#9
@ Thedung......
no amplifier is required..from cell to 8870 ........ic works fine on recived signal from cell.......only you should have touch tone volume full.....(based on my experience)
as....there is a inbuilt differential amp.......in it......
 thedung like this.

Get Social

Information

Powered by e107 Forum System

Conversation

ExperimenterUK
Mon Jan 07 2019, 03:31 AM
@REVOCATUS please post in the AVR forum
Mon Dec 24 2018, 09:25 AM
REVOCATUS MATEMU
sorry I mean referee boards for player substitution
Mon Dec 24 2018, 09:24 AM
REVOCATUS MATEMU
hi am.looking how to build referee by using Atmega 328 and its codes
Sat Dec 15 2018, 01:45 PM
Arslan ayoub
Hii ,, can I get the simulation of numeric keypad lock on proteus
ExperimenterUK
Mon Dec 03 2018, 05:17 PM
Please post questions in the forum. The chat box is for chat
Mon Dec 03 2018, 06:43 AM
help!me!
help! I don't understand busy flag!
Sun Dec 02 2018, 08:01 PM
ile
hello
Mon Nov 12 2018, 05:58 AM
Pavan_user
i have seen your replica of I2C programming using AT89C51 but i am unable to understand the "ack_bit" variable usage ...looks like it is always 1...can you elaborate how acknowledgment is working....
bgk3678
Tue Nov 06 2018, 02:36 PM
kindly any one give solution for my problem
ExperimenterUK
Mon Nov 05 2018, 09:48 PM
Pins high is the normal state. You need a program to set them low

Downloads

Comments

the_Doker
Thu Feb 14 2019, 02:21 PM
XanZes
Thu Feb 14 2019, 01:02 AM
dominicchiori
Wed Feb 06 2019, 01:41 AM
tandong
Sun Jan 27 2019, 01:38 PM
Rizz
Fri Jan 25 2019, 06:24 PM
Kheirodin
Tue Jan 22 2019, 11:54 PM
garfield0929
Sun Jan 20 2019, 12:48 AM
servprov
Thu Jan 17 2019, 06:44 AM

Online

Guests: 42, Members: 0 ...

most ever online: 182184
(Members: , Guests: 182184) on 06 Aug 2010: 05:37 AM

Members: 38045
Newest member: the_Doker
Forum Activity
ExperimenterUK Avatar
Posted By ExperimenterUK
Sat Jan 26 2019, 07:19 PM
Yes that helps a lot.At first sight I can't see th...
Rizz Avatar
Posted By Rizz
Sat Jan 26 2019, 06:43 AM
@ExperimenterUK I have updated the post with more ...
ExperimenterUK Avatar
Posted By ExperimenterUK
Sat Jan 26 2019, 02:30 AM
What is your definition of a Palindrome ?The ones ...
Rizz Avatar
Posted By Rizz
Fri Jan 25 2019, 06:31 PM
I have written a code to check if a number is a pa...
ExperimenterUK Avatar
Posted By ExperimenterUK
Sun Jan 06 2019, 10:37 PM
Which 8051 chip are you using ?
SONACHAI1234 Avatar
Posted By SONACHAI1234
Sun Jan 06 2019, 08:21 AM
Hi,By mistakenly i burn rx program in my 8051 micr...
ExperimenterUK Avatar
Posted By ExperimenterUK
Wed Dec 19 2018, 06:27 PM
Nobody knows?sifirsekizThe problem is that you are...
sifirsekiz Avatar
Posted By sifirsekiz
Wed Dec 19 2018, 12:15 PM
sifirsekiz Avatar
Posted By sifirsekiz
Sun Dec 16 2018, 11:13 PM
Guys pleaseeeee :((
sifirsekiz Avatar
Posted By sifirsekiz
Sat Dec 15 2018, 07:09 PM
HiThe pulse-sensor-amped has an analogue output.Th...