Cellphone operated Robot

Step 5: Construction

for constructing this robot, you require these components
Components used:-
" MT8870 DTMF DECODER - 1
" Atmega 16 microcontroller - 1
" L293d motor driver ic - 1
" Cd7004 not gate ic - 1
" 1n4007 diode - 1
" 100k resistances - 2
" 10 k resistances - 5
" 330 k resistances - 1
" 0.47mf capacitors - 1
" 0.1mf capacitors - 1
" 22pf capacitors - 4
" 3.57mhz crystal - 1
" 12mhz crystal - 1
" Push to on switch - 1
" 2 geared motors (6v, 50 rpm) - 2 (4 for four wheel drive)
" Battery 6v - 1

• wheels - 4
• cellphone - 2 (one urs and one can be ur frnds)
• handsfree - 1 (for the phn on the rover)

you have to place a cellphone on the rover. The cellphone is connected to the rover through a handsfree. construct the rover in the shape which is given below.

You can get these parts from any electronic store with ease

Comments

[mhenaoui]

merci

[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

[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?