Cellphone operated Robot

Conventionally, Wireless-controlled robots use rf circuits, which have the drawbacks of limited working range, limited frequency range and the limited control. Use of a mobile phone for robotic control can overcome these limitations. It provides the advantage of robust control, working range as large as the coverage area of the service provider, no interference with other controllers and up to twelve controlles.
Although the appearance and the capabilities of robots vary vastly, all robots share the feature of a mechanical, movable structure under some form of control. The Control of robot involves three distinct phases: perception, processing and action. Generally, the preceptors are sensors mounted on the robot , processing is done by the on-board microcontroller or processor, and the task is perfomed using motors or with some other actuators.

i want to make it clear, if you face any problem i am dere for you
, you can write comments or you can mail me at [e-mail]

Step 1: PROJECT OVERVIEW

In this project the robot, is controlled by a mobile phone that makes call to the mobile phone attached to the robot in the course of the call, if any button is pressed control corresponding to the button pressed is heard at the other end of the call. This tone is called  dual tone multi frequency tome (DTMF) robot receives this DTMF tone with the help of phone stacked in the robot
The received tone is processed by the atmega16 microcontroller with the help of DTMF decoder MT8870 the decoder decodes the DTMF tone in to its equivalent binary digit and this binary number is send to the microcontroller, the microcontroller is preprogrammed to take a decision for any give input and outputs its decision to motor drivers in order to drive the motors for forward or backward motion or a turn.
The mobile that makes a call to the mobile phone stacked in the robot acts as a remote. So this simple robotic project does not require the construction ofreceiver and transmitter units.
DTMF signaling is used for telephone signaling over the line in the voice  frequency band to the call switching center. The version of DTMF used for telephone dialing is known as touch tone.
DTMF assigns a specific frequency (consisting of two separate tones) to each key s that it can easily be identified by the electronic circuit. The signal generated by the DTMF encoder is the direct al-gebric submission, in real time of the amplitudes of two sine(cosine) waves of different frequencies, i.e. ,pressing 5 will send a tone made by adding 1336hz and 770hz to the other end of the mobile. The tones and assignments in a dtmf system shown below

Comments

[mamzar]

hye..
im very interested in GMS or DTMF projects
i want to learn it
could u please mail me a soft copy of your project along with circuits and datasheet ?
thankyou so much in advance and im waiting for your reply

[rani1993]

hiiiii.....

i am working on this same project......

i use ATMEGA16 controller ic.

my problem is that the controller's port-D is connected to motor driver ic-L293D. But i don't get the output from port-D thus i don't give the output signal to both DC motors. So what is problem in my circuit??????



please give me some answer as possible........

[aaaooo60]

can you tell in depth that why you use ic4 cd7004 in this robot.

[PICHIRS]

sir, when i connect the circuit to power supply the robot moves forward although the tip and ring is not connected to mobile phone.can u suggest me where the problem is???????????

[mendojoel]

There is a thyristor seen in your circuit, why is it not mentioned in your circuit diagram? I also would like to know which file should i burn in my ATMEGA16 and the best possible way....Thanks :)

[papo2110]

can i purchas the board already made from you and how mych

[jay8son]

Can I use Programmable IC in this project? and can I use a 3g cellphone and I will use 3G video calling so that it will have a camera integrated the landrover it? reply soon. I need your help. thanks.

[jay8son]

Can I use Programmable IC in this project? and can I use a 3g cellphone and I will use 3G video calling so that it will have a camera integrated the landrover it?

[vikas204]

hey can u tell what type this hansfree is this. i have asked about this in market but no one knows about this. can u suggest me some way. rplyy soon

[knagarkoti]

jus call the mobile which is connected to project and then control wirelessly.
note: mobile should be on self answering mode

[santhoshreddy]

hiii can u send me da abstract of this project plz

[knagarkoti]

its a mobile controllable wired or wireless robot. generally it works on the frequency variation concept.

[psingh37]

sir, can u pls send me the report on DTMF based robot control . my email id is
[e-mail]

[psingh37]

sir, can u pls send me the report on DTMF BASED ROBOT CONTROL .

[king2011]

very good great job i have more than idea about this

[dakudiv]

Very nicely compiled explanation. People looking for Code for decoding DTMF using Arduino ,can refer to this link here. 
Our team used Microcontroller Project board from Embedded For You magazine @ AET Design Lab.

[satishsaka]

plz send the soft copy to [e-mail]

[satishsaka]

SATISHSAKA
sir can u send a softy copy to this mail : [e-mail]

[yclim90]

sir,
i am interested in making mobile controlled robot, can u please send
me the steps and the things to use in making robot...
my email is ([e-mail])..

Hope to get your reply soon...Thank you..

[abhisheknagar]

pls help... i have made this cicuit the problem i am facing is i am not getting o\p from dtmf decoder IC i m stuck in this thing from past 1month previously it was working absolutely fine..pls help any1

[ishanduraphe]

thankyou for the detailed description. i'm obliged. thanks again

[asif59]

...I am very interested to launch this project.....I work with PIC 18f452....can I build it using this ? Plz help me with ur advice....mail me : [e-mail]

[finalpro21b]

Can u provide .hex file for Atmega32A & program That can buid in Avrstudio4 our emai is [e-mail]
can u provide ur email?

[thejeswarareddy789]

sir can u send me a soft copy to this mail
[e-mail]

[yadav366366]

if i will use microcontroller 8051, instead of using ATMEGA16.is there any problem in programme or circuit?

[hans lal]

if i will use microcontroller 8051, instead of using ATMEGA16.is there any problem because i have made the circuit using 8051 microcontroller of land rover project.?

[manikantak136]

sir,
iam interested in making mobile controled robot,so can u please send
me the steps and the things to use in making robo.please se ti to my
email ([e-mail])
thankyou.....!

[longjasp]

HEllo sir.., thnx for this idea.. Can i use microcontroller P16f84a or any 16f with the same dtmf decoder? then can i use pic basic language for the programming the microcontrller?

Need ur reply.. thnx

[spratap]

Hello sir,
Could u provide the full circuit description this circuit so i can work on it.My email id is [e-mail] .

[ejimenez6]

sir my decoder ic is CM8870PI .. .can you give me the proper circuit diagram for this ic? thx

[kyagendra]

sir!
i have an IC of ATMEGA32
can i use your hex code of atmega16 to burn into atmega32????
shoud it work properly???
or would we have to change something in hex program
plz...... tell me sir???

[ashishggct]

thanks instructables...for this awesome project discription.

[devendrabande]

Hii sir,
can u give me All the document of this projects
my mail id is [e-mail]

[mnadeem]

can you please forward all the documentation available related to the project
[e-mail]

[Sawan30]

please send all data to [e-mail]

[roboguy22]

i need yor help,sir

[cganguly]

can you please forward all the documentation available related to the project
to [e-mail] .Thanks for ur help

[srajput3]

please send me the review for this project and the all required things on my mail please...
my email id is [e-mail]

[comspec2600]

Please send the documentation for this project to [e-mail] or [e-mail]. Thank you very much for taking the time to do so.

[sshah17]

can you please forward all the documentation available related to the project
[e-mail]

[varshneydevesh]

can u plz forward me complete project report ASAP on [e-mail] ... m trying to make a GSM controlled landrover using 8051 !

[naveen420]

hii im intrested in project plz send me the complete details to my [e-mail]

[swati.mmmec]

plz anybody send me complete documentation of this project.....

[prashant3]

pls. send your email Id by mentioning instructable member. Then I will immediately send pdf file of same project to you in one minute. And also if you need of full constructed same project then also say me dont hesitate.
Thank you!

Prashant Gurav
[e-mail]
09420644061

[abesrocks]

plz send me complete documentation of this project................ [e-mail]

[mshahzeb]

this is a very good project i really like it

[tintin2432]

sir can you plz mail me the ckt dia and code for avr in c language......
m new in microcntrolers... plz help me out sir...

[e-mail]

[gramesh]

Hi guys.....
i so much interested in this project..... please can you send the total information about the project...
this is my email id: [e-mail]

[pakhton tesla]

it looking cool. can we control different servos from mobiles for RC PLANES

[amrit0003]

which file is to be burn on the at mega 16,     is it .HEX

[mshahzeb]

yes

[shaadmahmud]

anyone can tell me plllzzzz do i have to upload just HEX file into atmega16 ro anything else plzzz let me know....plzzzzz help me anyone...

[mshahzeb]

only hex file

[ankit11]

 ur using a controller and u dont know that u have to up load the hex coad.......!!!!!!!!!!!!!
its easy

[vishal.venkatesh]

Hi this is a wonderful experiment which I am having an idea of displaying it in my science fair. But I am using ONIDA G490 mobile. I don"t find any option such as auto answer. Please help me to solve this problem

[mshahzeb]

if you have not find the autoanswer mode you can accept the call manually.

[p.arungoud]

can any one tell me what is the software that is used to compile the source code and develop .HEX file.

[mshahzeb]

codevision avr c compiler

[mshahzeb]

can i make programmer in home for atmega16

[vaggarwal]

How to connect the Not gate between Dtmf decoder(mt8870) and atmega16??[N1 to N4] I have used the 74LS04 NOT gate(couldnt arrange for cd7004). cant figure out which connections are to be made. You havent specified how you used the same in the circuit diiagram

plz reply soon
(or mail me at [e-mail])

[vaggarwal]

ohhh i got it ....
couldnt see the numbers written before on the not gates

[mhenaoui]

merci

[cell phone operated robot]

thankss instrubles really thank u i got the source code and also my project i working..

[ncholleti]

any one here do reply please .. why did you use a not gate and "~PINA" and what do you mean by the above notation .Is it necessary to write the program in that manner itself can'nt we change it ?? inseated of useing not gate can'nt we directly interface it with mc ?? please do reply [e-mail]

[rahugogo]

sir,can we add wireless camera in the robot and control by mobile

[zealotzshams]

my question is same as RAHUGOGO ASKED. IF THIS IS POSSIBLE THEN HOW WE CONNECT CAMERA WITH MOBILE PLEASE REPLY ME AS EARLY AS POSSIBLE
this is my id
[e-mail]

[skumar-1]

Its better to use a 3-G phone...

[RoboLabz]

There is a wireless camera comes around 1500 rs you could find its model on vegarobokit website. That camera can be operated by 9V battery, if you want to use that camera on-off you can connect a relay with microcontroller that gives power supply to it.

If you want to rotate it than connect a dc motor vertically and fit camera on it move that motor with the signal coming from microcontroller.

To know how to build mobile controlled robot and its program you can refer to my blog   robolabz.mutiply.com

[ashwanikaushik92]

 please give me the connections of relay with the microcontroller so that it can be operated by the cellphone

[akhiljohn]

its a great project for me as i did this project and some problems occurred but nw my project is going gud...

[deepak.j.prakash]

its a superb project. any way could u add a small wireless camera modle too .
so we can locate the position using a computer

[Nishan_Bajwa]

very nice project nitin........ i'm ECE 2nd year student plz help me for making good projects nd circuits... any body can send me mail for related to circuits my mail id [e-mail]

[ricchandan]

how to get the program

[raja101sri]

i may be (cell phone operated robot.zip17 KB )take this zip format program....and extract my friend......then open file in notepad ........programs are there.

[gary.kam]

thank you so much nitin. i made a wireless car but having interference from mobiles. i used 434mhz tx-rx module, can you suggest me what to do? is there is anything to do with filter's? if yes than plz let me know as i m a beginner and i have to submit my project in 1 month. and plz mail me this project and also tell me how to connect this project with mine by using 434mhz tx-rx and HT-640 and HT-648L encoder and decoder ic respectively..........plz mail me this project at ([e-mail]).

Regards

[tzq33tdq]

would i be able to use front wheel steering like a car instead of tank like?

[chawla_mohali]

shabaash puttar! :)
khush kar ditta..

[pravudatt]

is it possible to cnnect IR-sensor and wireless camera to robot.............PLZ share some ideas as soon as possible

[srirajpillai]

hey every1...can anybody pls tell me if we can use a CM8870 instead of a MT8870....pls, its urgent.

[praghu_cool]

Hello Guys,

this is my project, even the picture and the block diagrams are from my presentation. Mr. Nitin Sharma had copied it from my web site, www.raghu.co.nr ..
But sill happy to see the great response ....

[parveshji]

my question is same as RAHUGOGO and ZEALOTZSHAMS ASKED. IF THIS IS POSSIBLE THEN HOW WE CONNECT CAMERA WITH MOBILE PLEASE REPLY ME AS EARLY AS POSSIBLE
this is my id
[e-mail]
thank's in advance....

[brindhasuday]

i liked this idea mail me the details to [e-mail]

[yogesh99]

Its Farad not farat

[D5quar3]

Can i do this with a Arduino Duamilinove?

[raghavathej]

hi im raghava im planning 2 make the same project as my final year's project...but as u have connected a mobile 2 robot n 4m other mobile u call to 1st mobile...this has a problem ...each time u call , the amount(money) in cell phone connected to robot will get cut...is it so.... so every time u want 2 use the robot u require to recharge...can u somehow change it to control it via bluetooth...plz is there any other way...anyone can answer...this instructable who answers is a genius...i know that there are many pros n teachers who can guide ...mail me at [e-mail]

[vaibhavkulkarni90]

hey can u send me the source code [e-mail]

[rajrockee]

hi can you please mail me the report and the complete details about the project.. i wanna use it as the reference.... [e-mail] plz,,,,,,,,,,,

[ricchandan]

can u help me wid this project

[pratyusiva]

Hi all can any one know about BOMB DETECTION USING ROBOT ..if any one know please send the [e-mail]

[emersonrosales]

sir, can u please send to me the data sheets of this cellphone operated robot. i will make this as my electronic design. can you please help me.

[praghu_cool]

Hi all, Please visit my blog @ www.raghu.co.nr for more details (pics, ckt diag, code, mechanical design etc.., ) on this project .

[vishal.venkatesh]

Hi! Can you please explain what is mean by hands free. Eagerly waiting for your answer-vishal.

[vishal.venkatesh]

Hi. This is a wonderful experiment which I think that I could display it in my science fair. But I am using ONIDA G490 mobile. I can"t find any option such as auto answer. So please help in solving this problem.

[shyam.sunder91]

this one is not working for me i havnt placed 22pF capacitors at the oscillators end(is that very necessary) i tried to measure the voltage of the the singnal from the mobile jack it reads nothing even nothing in mv (is this a casual thing to every one???) i used nokia 2626 for this my mobiles jack has two wires one the mic's and other is the speaker's am i right?? each wire has another two wires with some sort of insulation seperating both of them one set has a red wire+a gold coloured wire another set has a green wire+gold coloured wire which one to use and how

[shyam.sunder91]

this one is not working for me i havnt placed 22pF capacitors at the oscillators end(is that very necessary) i tried to measure the voltage of the the singnal from the mobile jack it reads nothing even nothing in mv (is this a casual thing to every one???) i used nokia 2626 for this my mobiles jack has two wires one the mic's and other is the speaker's am i right?? each wire has another two wires with some sort of insulation seperating both of them one set has a red wire+a gold coloured wire another set has a green wire+gold coloured wire which one to use and how

[shyam.sunder91]

this one is not working for me i havnt placed 22pF capacitors at the oscillators end(is that very necessary) i tried to measure the voltage of the the singnal from the mobile jack it reads nothing even nothing in mv (is this a casual thing to every one???) i used nokia 2626 for this my mobiles jack has two wires one the mic's and other is the speaker's am i right?? each wire has another two wires with some sort of insulation seperating both of them one set has a red wire+a gold coloured wire another set has a green wire+gold coloured wire which one to use and how

[neha_agn]

 hi everyone ,i prepared this project as my final year project but i have not sufficint material to preapare report.can anyone send me the report or more material on this project as soon as possible.my emailid is [e-mail]

[swati.mmmec]

 Sir please tell me the applications of "Cell phone Operated Robot"

[santoshks1987]

 It has many applications. It can be used in military applications for enemy detection, in emergency area like building collapses, bomb blasts etc. in nuclear power plant, in thermal power plant,, etc........

[santoshks1987]

 Hi Sir,
I have chosen this as my final year project and almost completed it. I need the complete documentation of this project. Please mail it to me as soon as possible. My email id is [e-mail]

[santoshks1987]

 hi can anyone get me the ieee paper of this project

[swati.mmmec]

Hello Sir,
Please send me the complete documentation of  "Cell Phone Operated Robot"
I want to make this project as my Btech final year project.
It is needed urgently at this time. so please mail me.

My email id is [e-mail]

Thanking you. 

[charl0tte]

can I please please please pleaseeeeee get the whole documentiton for this super amazing Cellphone operated Robot, I would like to recreate it, pleaseeee
my email is [e-mail]
thx anyway

[Dhanendra]

any one plz send me documentation n reports with progrming....plz......on cellphone operated landrover.  my email id- [e-mail]

[prakash123]

 hi can you please mail me the report and the complete details about the project.. i wanna use  it as the reference.... [e-mail]

[sudhamsa]

 if possible could please send me the report to mail id
[e-mail]. please and why are using capacitors and two resistors before the dtmf decoder. thank u.

[sudhamsa]

why are u using cd 7004 not gate what is the need ?

[shafi.3906]

 GOOOOOOOOOOD DUDE.... THANKS FOR UVR GOOD VL.......

[angadi]

Hi ...
My Question is that  4 Cellphone control robot.

While taking right turn or left turn .How we will be knowing.We are not able to see it right.
We are operating some where else.Pls help me out.

Regards,
Sredhar.

[srikanth441]

 Hi friends can you help me in this project.Here we can connect two motors
can you help me how i can connect 8 motors in this.

[shaadmahmud]

u can connect 8 motors but then u'l need 4 L293d and code will change according to ur desire...

 

[srikanth441]

 Can you give me the code and the circuit for driving 8 motors.Please i need to submit it as my major project time is going to complete.

can you send me a mail at [e-mail]

[sonyr]

we r new beginers how can install the software in avr

[shaadmahmud]

b more specified which software u want to install?,,

 

[dedo21]

hi i have a question what is the reason for the not gate ic from ur program i can see that u have canceled the effect of the not gate again

[coolankur.cs]

hello sir...can I know the complete details about step 7......yhat which wir of headpone is tip and which one is ring?pls reply me its urgent......as i m unable to complete the last step...................ANKur

[baseer ahmad]

i have make the robot and work fine but when i press 2 the both motors will start at same time when press 4both will of i will cheak all the conection it will also fine. can it is possible i have mistak in programing i will only burn the .HEX file into ATMEGA16 can it right. if yes what is another problem please help me

[prateeksikar]

 i had the robot but there is aproblem that i donot have the jack to connect the headphone 
can i attach a jack to connect a headphone at the place of wires plz help
i had the project with atmel8

[mirzaabidbaig]

handsfree have 2 wires but the dtmf i.c has 1 input of dtmf........so whre we connect the 2nd wire??

[ankit11]

 The 2nd one is the ground yar..........

[godfreyandthandi]

maybe gnd?

[wardog]

i want to mod an R/C car that Can be CELLPHONE operated/controlled.... is this the same concept???

[ankit11]

hi wardog 
no,both of them are not same,R/C uses radio freq. and the range is also limited
this project uses DTMF to controll,and it is more advance tech...........

[aniruddh268]

hey bro...is this project is fully working? i mean the circuit diagram the program etc are they all correct? confirm ,there is no corrections in that??? i want to make it as my final year project,please reply me ,....thank you

[ankit11]

 hi aniruddh im also makin this as my major project and belive me it works.....

[shiv262932]

hello, I am 3rd year student of ele.&comm. i did this project in my second year,but unfortunately it fail, vehicle does not work properly as i want. i have problem with microcontroller wheather i use ATMEGA16 OR ATMEGA32. now i want to proceed with this. so please give me suggestion about this in detail.

[ankit11]

 use any of them,ur coadin and the solderin of the PCB are more imp.......
the project is easy

[jaaved]

wow its an amazing project it really works 100% i just loved it doing as a project in my college

[thecloser3]

What program did you use in order to write the code??

[ankit11]

 hi thecloser3 this is ankit
use c or assembly language to coad the controller.........

[ravdon]

will u help me dear plz

[dedo21]

hi i was wondering what is the function of D1

[ankit11]

 controller needs 5V as a supply.............
the diode is a silicon diode so a drop of 0.7V will be their and the controller gets around 5.3V,which is sufficient for it.........

[kiran_ap_12]

excuse me...
        what is that code purpose???  why we use that code????4 wt we r using that????

[ankit11]

 controller needs coadin,use keil to coad..........

[sharry_0505]

 coding is done for microcontroller. with the help of proper coding only, we can interface with the peripherals. u need compiler and coding device for coding. 

[madho_mehra]

hii friends..this is a very good project...
try this out.
i also made this project in my final year semester..i wish i could help you..
mail me to [e-mail]
i will try to sort out your problems if possible....

[rathinavelu]

hi madho. im much impressed by this project. i would like to do this project in my college. could you plz send me the full details regarding this. My e-mail id [e-mail].
Thank you in advance.

[amrit0003]

i have a simple idea about fitting wireless camera on the robot ,just use 3g enable handset and use video calling .india video calling is cheaper than normal calls

[chash]

can u say me a perfect realtime example so that v can convince any 1by saying that this is best and v have no other option to choose other technology

[itsdigital18]

Sir can u plz send documentation at [e-mail]

[sachin sharma]

can i use 8051 instead of ic atmega 16... if yes thn pls give me some details about how to program 8051 for cellphone operated landrover... plz rply me on my email id [e-mail]

[itsdigital18]

Sir can u plz send me documentation n reports .

[nandki]

 Can i burn the hex code bundled in zip file DIRECTLY to ATmega16AVR.Will it be all right ?

[tristantech]

Should work

[bhavikchaudhary]

It's nice but i want ur help

[majay]

i like this, please mail me this pdf [e-mail]

[natin.joshi]

hello dear.
i saw your project at instructables.com,
its amaizing project i like it.
can u send me this project's report or documentation of this project ?

[nikhildvijapur]

did u get the total info about this pro....
please mail to [e-mail]

[cemot]

i need full step and this tutorial..
help me please

[RoboLabz]

Hello Cemot there are some websites with project reports for this robot available so please search on the net 
but you should know all the microcontroller basics and a little bit of C  Programming Language
I put some  stuff in my blog  reIated to this topic 
 hope that it will help you

[cemot]

maybe you should tell me the site who should visit about electronic schema and source code C language... 

[syaiful_26]

good

[cemot]

 I need Full step, can you help me..???

[Genocide786]

i used the PIC 16F84 to build this.. email me if you want the code for it [e-mail]

[gaurav nagpal]

hello... gaurav here... i m working for the same project.. plz contact with me... [e-mail] or at 09888443017

[hunter9t9]

i want a pc to calculate the moves n use the cellphone controler as a path to control

[hunter9t9]

can u tell me how to make a wireless video transmission circuit.
n i want it to use mobile phone's cameras

[kareden]

Yeah, but this call is expensive for fun. :) Whay don't tray with aplications like Skype with WiFi?

[mdgnys]

It wouldnt be too expencive if the phone is the same currier Like cingular (i know old school right, you get calls under the same carrier for free!  and the way data is sent is through dtmf which is just tones sent through your keyes It would be free!

[thecloser3]

Did anyone have trouble obtaining the 6V, 50RPM motors? Because I can't seem to grab any near my location or online. Does anyone know a reputable web site?

[Genocide786]

Greetings.. I want to build this robot for my final year of engineering but i require guidance from someone throughout my design because i want to use a PIC or an 8051 instead of the Atmega16.. i will also require help with the programming.. please email me at [e-mail].. and this Nitin Sharma isnt replying to my email :o|

[ashfaq_ahamed]

yes!!!!!!! u can use any Microcontroller(PIC or 8051)... i had tried this project as my hobby project in college & its working fine.. one more feature you can add is a voice feedback by using any voice recorder IC like APR9600...

[gaurav nagpal]

hello gaurav here.... i m working for the same project... plz help... contact me @ [e-mail] or @ 09888443017... thank u...

[praso]

nice one. i built it but the code is not running properly.

[saadayub]

hi caN you PLEASE mail me the pcb layout of the circuit. my email [e-mail]

[shivarungta]

here is my query........ i modified my dtmf circuit and replaced the microcontroller with multiplexers(i am kind of afraid of them!!).......so........would it work??? and.......how do u connect that damn phone to the circuit??? PLease HELP ME OUT!!

[shivarungta]

(removed by author or community request)

[PSPerson]

You would probably get your answer quicker if you used proper spelling and grammar.

[suresh reddy]

if we use 6v ,4.5ah battery ,the microcontroller will damage .so i want to connect 5v regulator in series with battery . can u suggest it?

[zippys123]

suresh u can use 7805 voltage regulator for 5volt regulation

[sarveshk]

I have a old, scrapped Nokia 3315. Can I use it's internal DTMF decoder by openning it's shell? Can Anyone tell me the procedure and where can i find it on the pcb?

[eewilfred]

hi am doing this as my mini project . i already got all the hardware for this now im considering to change atmega 16 and use 8051 as its part studies . i am olso considering to use a 1x16 mux instead of microcontroller. thus switch the logic according to dtmf ic o/p. then connect to normal circuit. plz commend on all circuit changes i need to make for this and in case mux i k which is one will suit tanks in advance

[sivaprasad.ecemits]

Sir.., Can u plz mail the PCB layout to me to [e-mail]

[harshb_delhi]

hi.. I have completed the hardware design as per the specifications but when I'm coming to the software part, the source code is giving an error on line 4 as "declaration terminated incorrectly". I am debugging ROBOT__.c file. Which one should I execute.??

[sivaprasad.ecemits]

Sir i have one more Problem in doing this project.. Iam not getting that NOT GATE IC CD7004... withOUT that IC .. WHAT ARE THE CHANGES TO BE DONE in PROGRAMMING ATMEGA 16... Please help me Sir... Please do mail me [e-mail]...

[ynk06]

~pinA => pinA

[ynk06]

i have try to exclude that, the decoder output seems to have some problem,i dont know the reason

[sivaprasad.ecemits]

Sir Iam doing the project given by you Cellphone operated Robot.. I have the following Doubts please clarify them pls.... 1. How to connect four wheels to two DC motors 2.How to find RING and TIP Terminals of Ear Phone Jack 3. Can You please send me the BOTTOM View of your PRoject.. Please Reply me at [e-mail]

[RoboLabz]

Dummy motors

[RoboLabz]

Use two motors with two wheels at back side and use two dummy motors to connect the front wheels or better to use a castor wheel like i have used in my project. You can get dummy motors from your old scrap of geared motors remove the motor and gears from that and use the shaft only. To connect the TIP and RING of the earpiece remove the speaker from its case and solder two wires from the speaker connections. If not worked change the polarity and then try again and if again not work remove the speaker and solder the wires directly to the speaker wire and use it NOTE you have to remove the enamel coating of speaker wire by heating it then solder it and taped it.

[RoboLabz]

Send the queries on [e-mail] I will answer the doubts related to my rover which you can see on robolabz.multiply.com

[sanya.anees]

hi nitin m working on this project m facing problem in its PCB Layout can u plz mail me its layout at [e-mail]

[RoboLabz]

i Can email you the PCB layout but you have to change the microcontroller and supply section you can see the video and new circuit diagram on the robolabz.multiply.com

[harshb_delhi]

Hi, This is a cool project to work upon....well just had 1 question, can we use ATMEL's AT89c51 microcontroller instead of IC2. If yes then what all changes will have to be made in the circuit?

[RoboLabz]

you can change the microcontroller with any other microcontroller likewise I used ATMega8. The format of program will change according to the ports you will used. but the given circuit diagram will affect your microcontroller and DTMF decoder because nitin had not used any voltage regulator so use 7805 in the circuit diagram

[RoboLabz]

Video

invalid movie: http://robolabz.multiply.com/video/item/33/Mini_rover_controlled_by_cellphone

[RoboLabz]

I have also made the same project but use a voltage regulator in place of the diode which makes conform that the logic supplies for the micro controller and DTMF decoder remains within 5V not in 6.1V when a 6V battery is full charged

[TheAmazingJampie]

If you did this with a PICAXE it might be easier, but is it possible?

[ynk06]

Just want know is the code written in C? or in assemble?.. coz i can found both the code in the zip file...

[wee_man]

Hey this it pretty cool is their anyway you could add the to a home landline so you could call home and then press a sequence of buttons and then the robot could act possibly turning on tons of different things. Also would this be possible with a picaxe?

[archana bhat]

hi nitin... i m doing this project..i am in 4th sem.. how to check the input and output of microcontroller... as its a 8 bit one.. and ports are only 4..like if the input is 2.. input to microcontroller has to be 11111101.. and input pins are PA0 to PA3.. wat has to be individual pins output..........plz help me soon..

[dmorrill22]

I am certainly interested in this project, however, I won't be doing it for awhile. It will be a computer controlled robot that uses two cellphones for transmitting/recieving signals.

[ankushsoni]

hii...it's a very nice project...i have programed the atmega16 with the (.hex) files given by u through universal programmer....are this hex code correct??...and please also tell me about how to check the DTMF tone decoded by the decoder IC used..... please reply soon.... my email is: [e-mail]

[haldyboom]

hii...it's a very nice project...i have programed the atmega16 with the (.hex) files given by u through universal programmer....are this hex code correct??...and please also tell me about how to check the DTMF tone decoded by the decoder IC used.....
please reply soon.... my email is: [e-mail]

[lert04]

good idea

[ry25920]

couldn't you make it recondnise touch tones?

[hars34]

has anyone completed this thing......and is it workin......?????

[heloitsadi]

Yes i ave completed the project, and its working. But my project is bit modified as i have not used the NOT gate ICs, instead i have done the variations in the coding. It's working is absolutely perfect.

[hars34]

but why is the not gate used in this circuit,....wat its use....??/

[mohsin_khan22]

Hi, im working on mobile operated landroover project for my TE entc project. im facing a problem while connecting tip& ring of headset to DTMF decoder.please tell me in detail about tip& ring of headset & how to connect it.

[yatishdevadiga]

i have also taken this as my T.E. E&TC project a headset has two wires - one for left ear and other for right ear cut the ear plugs and strip the wires you will find two wires coming out of each ear one is the tip part and the other wire is for ground. ground of both the ear's is common. you can check the continuity by DMM.the connector is divided into 3 parts. frontmost point is the TIP point and end most point is the ground. place one end of DMM on the TIP point and check the continuity with the stripped wires.the wire for which you will get the continuity with the tip point connect it to the TIP part of the circuit and the one with continuty for ground connect it to the RING part of the circuit.

[hars34]

ya thanks for the info....did u connect it to the circuit and is it workin...????? which mobile r u using........wen i press a key and verify using the dmm it doesnt show any voltage value......but does it....????how can i verify whether is it workin...????

[raguna]

hey!
it would be better if you could give a photo snap of headphone-to-circuit connections in your completed project.
and

how to check whether micro controller is embedded with pgm properly?

can we use a Sony Ericsson handsfree?

[ynk06]

i get some question about this project, if anyone can help my out that would be great

1) Can some1 tell if i can replace the MT8870 with MC145436 DTMF Decoder?

http://www.datasheetcatalog.com/datasheets_pdf/M/C/1/4/MC145436.shtml

2)I what do i need to do about the interface between the phone and the DTMF decoder?

3) and is 0.47mF = 470uF.....and what voltage do i need for this capacitor?
which is that the right one to get??
http://www.jaycar.com.au/productResults.asp?FORM=KEYWORD

[heloitsadi]

Can anybody tell me what is the use of adding not gate ICs after DTMF decoder IC.

[yatishdevadiga]

i am working on this project for my T.E. engineering i am facing problem in connecting the mobile to the circuit. please tell me how should i connect the mobile to my circuit. i tried connecting the headphones. the headphones have ground common.i connected the ground wire to ring part of ckt and one of the other wire to tip part of ckt.i am not getting any signal at the o/p of MT8870. do mobile phones send DTMF signal? i asked my seniors.they said that mobiles do not send DTMF signals.but i feel that mobiles can.i have seen a working model of this project on youtube. if they can then which mobile phones are capable of doing so?please tell me the types of mobile that i can use.and also tell me how should i connect it to the circuit. please,please help me. thank you.

[heloitsadi]

Go for NOKIA 1100, it does send DTMF and also have auto answering mode. All mobile phones send DTMF, but you have to do some internal settings in expensive phones like N-series etc. But NOKIA 1100 will work perfect.
Robotics INDIA

[hars34]

hi,i am doin this as my project...i am facin problem connectin the handsfree to the circuit.......has anyone tried it..???if anyone knows pls help me out.....as there is very little time left............

[vkgupta1987]

hello i m facing the problem while burnning the atmega 16 the code given in this site shows 7 errors plz post me the right code

[mohsin_khan22]

Hi, im working on mobile operated landroover project for my TE entc project. im facing a problem while connecting tip& ring of headset to DTMF decoder.please tell me in detail about tip& ring of headset & how to connect it.

[ynk06]

Hi, just wondering what the "ic4 - cd7004" purpose is? i cant find any information on this on the web thank you

[ashfaq_ahamed]

hi Nitin.. I like you project very much.. Great work.. I have decided to do this as my Mini-Project.. I have following doubt.. How can u moniter the robot if You are not near to it or operating it from any other location?? can we add camera to the robot and get the images on PC?? how to do it?? can we add a password to operating Mobile so that there will be only user to control it???

[ganeshbhagat]

HOW TO INTERFACE MOBILE HEAD PHONE TO ROBOT I HAVE TRIED BUT FAIL

[vasu1012]

i have a motorla l6 phone with me and i'm planning to use that in the circuit. It has auto-answer option. But it has an USB port to connect the headset.If i want to use it, is it ok if cut one of the ear phones and connect the wire at the 2nd pin of DTMF IC? The next thing is what is the significance of word "RING" written at the ground in the circuit

[amolbotikar]

can we use 89c5rd2 in place of the atmega 16.

[Nunavutnewsrules]

I wonder, could you adjust the tolerance so that you could sing into the phone and control your robot? I could never because i can't sing at all but some one might.

[razzz]

hi nitin,
i was really interested wit dis robot of urs so decided to do dis as my final yr engineering proj...

taut dat v improve it by addin more features like implementing a cam on it, do u ave any better ideas to do dis (how to transmitt n recive video signals)....??

n also v taut to use the rest of the keys(1,3,6,7..) to increase the features for example pressin 1 will turn on the light (also mounted on robo) but v cant do dis wit single MT8870D so can v use 2 MT8870D's?? if so how....??

plz reply.....'

[maheru]

Hi Nitin! I like your project. But I have some difficulties. Please solve these. On which model of mobile phone, autoanswer facility is available? On which model of mobile phone, handsfree connecting ports are available. Which 2 mobile phones you are using in this project? Please tell me the model numbers. For both mobile phones, I need handsfree ports? Also please tell me which are the other mobiles that I can use for this project.

[wowowee]

i second that...

[wowowee]

very nice...hope u will update it into a more detailed instructables...

[janet_aj27]

Hi Nitin, you could also use this with a 3G phone. using video call to look around while driving. this was published in EFY right? cool.

[neelima mudhindi]

(removed by author or community request)

[Nitin Sharma]

sorry i didn't get u!!! as far i understand u are talkin abut audio feedback from the robot to ur cellphone

[catchnil]

hi Nitin, Thanks for the information, i wanted to know whether i can replace microcontroller by logic gates (design logic gates), as i have no idea in electronics and programming it again is a high time for me... can u help me in this?

[Nitin Sharma]

sorry, no idea!!!!!

[pilla nagaraju]

Thanks for giving the information about the cell phone operated robot its vary interesting project to do if we can attach the wire less cam like Xcam2 (model XX11A) i think it useful for the military purpose.

[Nitin Sharma]

ya i am working on it, i am trying my best to mod this robot

[vinnygx3pimp]

you could even theoretically use a small bluetooth headset in place of the phone and keep in range and you could use the cellphone to which the bluetooth headset is linked as a remote. Because when you press the buttons on your cellphone you hear the dtmf tone as well so it would work both ways. This would be a very cheap alternative to some of the bluetooth controlled cars i have seen.

[Nitin Sharma]

u mean, connecting the bluetooth with rover ?? if you meant the same we can't use bluetooth, becauz after that the range for controlling the robot will get limited. In the case when u use two cellphones, you can control the robot all over the world also connecting bluetooth with the rover is a tough job, i'll have to break my bluetooth an in 'India' u can get a cheap phn for the price of a new bluetooth headset.

[vinnygx3pimp]

i know but you would just connect the bluetooth headset speaker as you do with the phone just wired in. and it would only be used for short range. as with the camera posted in a previous comment. you could use a phone with video calling and just open the phone and adjust the video call camera to face forward

[Nitin Sharma]

ya, u can do that

[Burzredion]

can i use any kind of movil phone?

[Nitin Sharma]

i didn't get u ? movil phone??? plz explain

[DavidRobertson]

He means mobile phone

[Burzredion]

I want to know if I need a specific model of phone or using whatever it's going to work.

[Nitin Sharma]

u can use any phone. but make sure that the phn u r using is having autoanswer mode. becauz if it will nt have autoanswer mode then u have to manualy pic the phone. and to decrease the complexity , use a phone which has a handsfree connecting port as the one which is shown in the instructable (i have recently added it, check it out). becauz in thoese handsfree ports it is easier to identify "tip" and "ring"

[shivarungta]

nitin,thanx a lot 4 this projct!! actually i had seen it in d july edition f EFY(electronics for u) mag. & had instantly clickd wid d idea. hwevr,i lost dat mag. & was searching the manual 4 dis prjct evrywhr until i ran in2 ur article. gr8 effrt dude!! 1 more thng!! 1 f my seniors had designed d same robot but his needs to b reseted frequently. cn u tell me d reason?? also,cn u upload a close-up f ur dtmf ckt??

[Nitin Sharma]

if u r using this rover in India u have to reset it few times (but not frequently) it is basiclly due to network disturbances. and i have uploaded the main circuit in the instructables and the DTMF circuit can be viewed clearly

[evanwehrer]

This is a great project, but like the below comment, I had a hard time reading it. You should go back and try to make your grammar better, and then it would be a GREAT instructable. Also, you should try to take better pictures.

[Nitin Sharma]

i really made it in a hurry, i will definietly improve this instructable

[evanwehrer]

Thanks, I really want to build it.

[daniel2008]

Nice instructable, how about using a video call phone and you could get live video feedback as well ;)

[Nitin Sharma]

i am still working on it there are ways like bluetooth, wifi, radiofreq for transmitting vedios. but i am working on, vedios transmitted from the bluetooth to the same phone which is used to control the robot

[PKM]

The robot looks great, but your writing needs some changes. The "text speak" (using "u" instead of "you", "frnds", "phn" etc.) is unnecessary, you have as much space to write as you want so it just makes your text harder to read. Capitals and punctuation would help as well. It also makes the introduction stand out as not your own writing- copying is frowned upon but in this case I can find that exact phrasing in a lot of other places online anyway. Overall this looks like it could be a great Instructable but it's let down by the writing.

[Nitin Sharma]

i really made it in a hurry, i will definietly improve this instructable