Instructables
Picture of Cellphone Operated Robot
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This Instructible is entered in the Category: 13 - 18 of the National Robotics Week Robot Contest

MY URL-http://avadhutelectronics.blogspot.com/

MY Email-avadhut.deshmukh@gmail.com
                                                                    


 


 
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Step 1: Component Required

Picture of Component Required
Component Required:

IC1 - MT8870 DTMF decoder
IC2 - ATmega16 AVR microcontroller
IC3 - L293D motor driver
IC4 - 74LS04 NOT gate
D1 - 1N4007 rectifier diode
R1, R2 - 100-kilo-ohm
R3 - 330-kilo-ohm
R4-R8 - 10-kilo-ohm
C1 - 0.47μF ceramic disk
C2, C3, C5, C6 - 22pF ceramic disk
C4 - 0.1μF ceramic disk
XTAL1 - 3.57MHz crystal
XTAL2 - 12MHz crystal
S1 - Push-to-on switch
M1, M2 - 6V, 50-rpm geared DC motor
Batt. - 6V, 4.5Ah battery
vaidya2 years ago
how to connect ear phone with it???which wire we should give to the input dtmf decoder ... and which should be grounded????
Avadhut.Deshmukh (author)  vaidya2 years ago
tip=tone and ring=GND

tip to green wire from jack and black to GND from Jack to connect ear phone done :)

do you have c language program for this project?

What are the components and circuit required to the this same project with atmega8 microcontroller???

AbhishekS43 months ago

yaar any body has the program & p.c.b layout of this project plz send me on abhibhadula1992@gmail.com plzz urgent help

gsandhu26 months ago

I’m working on a project which is about making a rescue
robot . I have struggling with it for 4 months and now all the mechanical works
had been done . but I’m facing difficulty in make the robot to work with rf
module can u plzz help me…

I want make transmitter and receiver that can control the
motion…I mean that receiver should have control 8 dc gear motor and each dc
motor should have a forward and backward botton to control the motion ……can u
kindly help me with this project ….if u can make the circuit board diagram for
the PCB ….or any other suggestion plz reply……mail me at “sunny1995gagan@gmail.com”

chatsbk0076 months ago

Was this Atmega 16 used SPI or Uart for communicatn with DTMF

KIRAN19610 months ago

WHY WE ARE USING NOT GATE AT THE OUTPUT OF 8870.

PLEESE REPLY ME ON MY EMAIL KIRAN.ENTC2@GMAIL.COM

gurek00011 year ago
thanku for the project i question sir, will this microcontroller n devlopment board do it-
1) http://www.ebay.in/itm/Buy-Atmega168-IC-Arduino-Duemilanove-Boot-loader-WDT-16Mhz-Version-/261240783294?pt=LH_DefaultDomain_203&hash=item3cd32a01be#ht_1304wt_906

2)http://www.ebay.in/itm/New-Atmel-AVR-28-Development-Board-projects-Microcontroller-not-included-/261240967992?pt=LH_DefaultDomain_203&hash=item3cd32cd338#ht_1129wt_906
gurek00011 year ago
hey buddy
well thanks
where did u got the wheels about 1/2" thick???
how should i increase it's speed???
http://thehobbyshop.in/index.php?main_page=index&cPath=43_45

please suggest me the components required.
So it means it will work....
Will this work with a 4*4 matrix keypad which produces same frequencies that mobile produces.
http://www.youtube.com/watch?v=TDVP-pXQmgU
maroofs1 year ago
i want to make this robot, can u please guide me in detail.?
aaaooo601 year ago
can you tell me how to interface serial ttl gsm modem with dtmf decoder instant of cell phone
niel9991 year ago
any one would be kind enough to help me with designing a obstacle detector with this cell phone operated robot would be a big help
fendrigol2 years ago
can get the coding for my last project , please
Avadhut.Deshmukh (author)  fendrigol2 years ago
http://www.instructables.com/id/Cellphone-Operated-Robot-1/step4/SOFTWARE-DESCRIPTION-AND-WORKING/

you can download
papo21102 years ago
WHERE CAN I PURCHAS ALREADY MADE DTMF DECODER $ HOW MUCH
sasi bindu2 years ago
which cell phone model i can use sir?.how to know a cell phone is working with DTMF or not?
Avadhut.Deshmukh (author)  sasi bindu2 years ago
only nokia old !

samsung not working !
Chebog2 years ago
Sir, Good day, I'm going to ask if where do i put the separate voltage for the MT8870 decoder IC? and can you please guide me in how to mount the earplug to the circuit?
(removed by author or community request)
6v only without voltage regulator !
(removed by author or community request)
Without burn ! only 6v !
supri3 years ago
are u use voltage regulator and why u use it......and where.....
Avadhut.Deshmukh (author)  supri2 years ago
only 6v !
Avadhut.Deshmukh (author)  supri3 years ago
(removed by author or community request)
where did you get the atmega in india
Avadhut.Deshmukh (author)  robot13983 years ago
Atmega16 it is widely available everywhere ! http://robokits.co.in/
and the programmer
6v only without voltage regulator
can i use 80v51 RD2 OR 8051 MICROCONTROLLER ?????
withe same code???
Avadhut.Deshmukh (author)  ajinkyadixit2 years ago
Same no !
dixitad88@gmail.com
mudz_072 years ago
sir how did u connect the mt8870 DTMF to not gate and to atmega 16?..
kevinmaru282 years ago
can u please tell me what would be total cost of project (cost of components) in rupees
Avadhut.Deshmukh (author)  kevinmaru282 years ago
Rs.500-1000/- low price ! ! :)
how to burn the atmega 16
AVR ISP programmer burn !!!! Yes !
kpkpkalpesh3 years ago
really nice project dude................
how to identify Ring & Tip in Ear Phones???? and can v use any mobilephone @ robot end!!!
fmazi3 years ago
interesting stuff
pkumar103 years ago
did you use ceramic capacitor of "0.47micro farate" ??. I have used electrolytic but circuit is not working.
plz rply soon..............
i dot think u would get a electrolyte capacitor of 0.47uf thats impossible
u can get a ceramic capacitor of 0.47uf
acudappah3 years ago
the motor is running as soon as i put da battery..da driver is not listening to the mc..wat to do??
tbone1213 years ago
great job, but you should post some pictures of the actual building process and maybe a video of it operating
Agreed. This looks really cool, but it would be great to get some more photos.
Avadhut.Deshmukh (author)  zazenergy3 years ago
Video Yes !
nyadav13 years ago
nice stuff
Avadhut.Deshmukh (author)  nyadav13 years ago
Thanx
hdhiman3 years ago
nice instructable thanks
vaggarwal3 years ago
Nice project :)

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

Also how did you make the four wheel drive?? using gears or adding two more motors in parallel??

Plz reply soon
(or mail me at littlegenius95@gmail.com)
kya ye 1100 hai????????
cool robot, second follower too, nice job too!
Avadhut.Deshmukh (author)  simplebotics3 years ago
thanx !