Discussion in "General help Guidance and Discussion" started by    nils_ec    Mar 21, 2012.
Wed Mar 21 2012, 09:07 AM
#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, 09:12 AM ]
Fri Mar 23 2012, 07:53 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, 07:56 AM ]
Sat Mar 24 2012, 03:14 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, 02:02 AM
#4
Thank you frnd... it works...
Tue Jun 05 2012, 06:38 AM
#5
How cud we detect the dtmf from touch screen phones..its nt giving sufficient voltage thru headphone output..
Tue Jun 05 2012, 11:33 AM
#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, 01:55 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, 03:58 AM
#8
thedung, create a thread for yourself. Dont open old threads.
Thu Dec 06 2012, 06:14 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......

Get Social

Information

Powered by e107 Forum System

Conversation

ajay_bhargav
Sat Aug 30 2014, 12:15 PM
@sufiyan, You can use solenoid lock in place of LED.
Fri Aug 29 2014, 12:17 AM
sufiyan
please can you tell me which type of lock activator should i connect in place of LED? can i use selenoid lock actuator
ajay_bhargav
Thu Aug 28 2014, 06:34 AM
Please post questions in forum
Thu Aug 28 2014, 01:44 AM
yednekachew
can you give a project made bay proteus software
Mon Aug 25 2014, 07:12 AM
Vinod Soni
Hi Sir, How can i make this RFID with ATMega16/32 controller
pavanjain
Sat Aug 23 2014, 05:10 AM
Sir i want to download the hex file in P89v51rd2 microcontroller using max232 IC but we not load the program in IC
Tue Aug 19 2014, 04:51 PM
allen ndumu
please i will like to know if the problem of speed control of dc motor using keypad and l298 was if yes can i have the complete project send it to the address i really need to see it
Tue Aug 19 2014, 10:47 AM
Amit Bisht
sir i want to have some trending projects on which i could work related to ATmega 16 microcontroller
ExperimenterUK
Sat Aug 16 2014, 04:16 PM
@diligent . create a thread
Sat Aug 16 2014, 03:17 PM
diligent
in assembly langauage programming..

Downloads

Comments

bobparihar
Mon Sep 01 2014, 06:19 AM
vijit
Sun Aug 31 2014, 08:33 AM
[email protected]
Sat Aug 30 2014, 04:45 PM
enisi
Wed Aug 27 2014, 06:08 AM
sadalakshmi
Wed Aug 27 2014, 12:39 AM
Paecake
Sun Aug 24 2014, 04:07 PM
pavanjain
Sat Aug 23 2014, 02:33 AM
samchovatiya
Thu Aug 21 2014, 02:30 PM

Online

Guests: 26, Members: 0 ...

most ever online: 182184
(Members: , Guests: 182184) on 06 Aug 2010: 01:37 AM

Members: 37504
Newest member: bobparihar
Forum Activity
Peter_Parker Avatar
Posted By Peter_Parker
Mon Sep 01 2014, 06:19 PM
Just to add to this,I've connected this now to a C...
ajay_bhargav Avatar
Posted By ajay_bhargav
Mon Sep 01 2014, 07:28 AM
Which RFID module are you using? Post link to the ...
ajay_bhargav Avatar
Posted By ajay_bhargav
Mon Sep 01 2014, 07:28 AM
We prefer to use English language on our forums. B...
bobparihar Avatar
Posted By bobparihar
Mon Sep 01 2014, 06:33 AM
i am using a RFID module, i want to connect reader...
ajay_bhargav Avatar
Posted By ajay_bhargav
Sat Aug 30 2014, 12:03 PM
Forgot to attach files. This has source for both R...
ajay_bhargav Avatar
Posted By ajay_bhargav
Sat Aug 30 2014, 11:56 AM
I found a very good working source but its for PIC...
siddique Avatar
Posted By siddique
Sat Aug 30 2014, 03:34 AM
Have you tried using the TX setup to receive and v...
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Aug 28 2014, 03:31 PM
So, I don't think there is any need to load any da...