
The line follower robot with wireless video camera.
I have designed it just for fun. First I want to know how the line sensor work. I used comparator IC using LM339, two H-bridge sensor using eight transistors, FCS9013, and four transistors, FSC 9012. For the sensor you can use LED and LDR as the light receiver. I changed the LDR sensor to IR sensor. I built this robot using only the analog comparator and IR sensor, no microcontroller. This is smart idea and very cheap approach.
You can download this PCB FILE (ExpressPCB file)

Figure 1: main layout and sensor layout.
Components:
R1, R7, R13, R14, R15, R16 – 330 1/4W +/-1%
R2, R3, R4, R5, R6, R8, R9, R10, R11, R12 – 10K 1/4W +/-1%
R17, R18, R19, R20 – 150 1/4W +/-1%
VR1, VR2 – 20K-50K
Led1, Led3 – LED(red) 3mm Led
Led2, Led4 – LED(green) 3mm Led
Optocoupler – 2 piece
Q1, Q2, Q3, Q4, Q5, Q8, Q9, Q12 – FSC 9013
Q6, Q7, Q10, Q11 – FCS 9012
U1 – LM 339
Battery 9 volt – 1 piece
Motor DVD dc 5Volt – 2 pieces
Tank toys for mechanic and wheel – 2 pieces

Figure2: JavaBot, my first line follower robot without the microcontroller.
There are two line styles, white line on the black floor and black line on the white floor.
If you use black line on the white floor, you can set the robot if the Right-Sensor is on the dark side or black line and Left-Sensor is on the floor it will go to forward (by swap polarity of the motor). If the Right-Sensor is on the floor and Left-Sensor is on the black line it will go to backward.

Figure3: Attach the wireless video camera to the JavaBot.
This project by Tahan Prahara, prahara_satria@yahoo.co.id
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August 27th, 2009 at 4:10 pm
hello
this is very good project and mostly used in final projects
Brijesh Arya
EmTech Foundation
September 17th, 2009 at 5:48 am
bobo wala schematic
December 4th, 2009 at 3:08 pm
can u give full details of this project.Because i give it name for my final year project.
January 24th, 2010 at 8:57 pm
hi
i’m very much interested in doin this project
so kindly can you give the full details of the project including circuit diagram and pcb layout
really this is very interesting
agugrg@gmail.com
February 3rd, 2010 at 11:24 pm
i really liked ur project very much can u give the details about it
February 6th, 2010 at 11:54 am
hi
i’m very much interested in doin this project
so kindly can you give the full details of the project including circuit diagram and pcb layout
really this is very interesting.
February 6th, 2010 at 11:59 am
hi
i’m very much interested in doin this project
so kindly can you give the full details of the project including circuit diagram and pcb layout
really this is very interesting.
plz send on my id-dhananjaygaya88@gmail.com
February 10th, 2010 at 7:13 pm
hi . this s really cool . can u pl send the project details especially the pcb layout to my mail id ?
February 10th, 2010 at 7:14 pm
hi . this s really cool . can u pl send the project details especially the pcb layout to my mail id ? mohancarthik@gmail.com
February 20th, 2010 at 11:18 am
i like your project plz give me some details about it
March 11th, 2010 at 1:14 pm
sir i wanna to complete the project on flying robot plz send me detail…
March 15th, 2010 at 11:37 pm
hey it very interesting.
could u plz help me by sending d detail of d given robo i wil very thank ful to u. to ma email id:
March 27th, 2010 at 4:36 am
Buset keren ya…sayange aku ora dikei……….
April 14th, 2010 at 8:20 am
i am very interested in your project please give the details to do this project
April 14th, 2010 at 4:56 pm
Je suis très intéressé par votre projet s’il vous plaît donner les détails pour faire de ce proje
April 25th, 2010 at 2:59 pm
this is really nice.pls send me the full details about the project.especially about pcb lay out
and functionning.thankuuuu………..
my email id: rajeshkannapwf@gmail.com
April 30th, 2010 at 12:28 am
i am very interested in your project please send me full details to do this project
August 5th, 2010 at 11:14 am
hey, nice job…plz send me more details…….
August 5th, 2010 at 6:50 pm
hello sir
project is very interesting.
if you don’t mind, plz send me project detail and pcb layout.
August 10th, 2010 at 6:33 pm
hiiiiiiii plz can u send me the full details of how u made it as fast as possible without usin the micro controller in details plzzzz and also how to integrate the camrea with it so dat i can view it wirelessly k thank you and fast plzzzzz
August 10th, 2010 at 6:35 pm
my mail is sushil_2316@yahoo.in
August 13th, 2010 at 5:42 pm
hi
i’m very much interested in doin this project
so kindly can you give the full details of the project including circuit diagram and pcb layout
really this is very interesting
August 15th, 2010 at 3:03 pm
can u email the whole refences? actually how it does work?
August 15th, 2010 at 3:03 pm
can u email the whole refenrences? actually how it does work?
August 16th, 2010 at 1:35 am
hi
i’m very much interested in doin this project
so kindly can you give the full details of the project including circuit diagram and pcb layout
really this is very interesting.
mail: cooldude_shankaran@yahoo.co.in
August 20th, 2010 at 5:23 pm
can u send me the full details of this project , i have a same event ( exhibition ) this year in my university .
abdulmajidsalah@hotmail.com
September 6th, 2010 at 11:48 pm
hi
i am very much interested in doing this project
so kindly can you give the full details of the project including circuit diagram and pcb layout
really this is very interesting.
mail;ramprathap7@gmail.com
September 7th, 2010 at 12:09 am
hi sir
i am very much interested on your project i want do that project
in collage association day please please send the project with full details
(ckt diagram parts required and stripboard layout) please send
mail:ramprathap7@gmail.com
September 8th, 2010 at 4:04 pm
i like it so much plz tel me its ckt. diagram i m b.tech final year student i want make this project
October 23rd, 2010 at 4:38 pm
I am very interested in your project
please send me full details to do this project along with ckt dia and source code also
December 2nd, 2010 at 12:21 pm
Hi there! Really impressed there bro!
Can you please give me a complete detail of the project on d_fact@live.com
thnx
December 7th, 2010 at 10:02 am
hi, sir ur project is very cool plz send me ful detail in ur project @project description
plzzzzzzzzzzzzzzzzzzzzzzzzz
mail id:vidyadeepak.yamarthi@gmail.com
January 24th, 2011 at 7:25 pm
hey i m vry much impressed!!!
can u plzzzzzz mail me da details of ur project..
my id: yakshan99@gmail.com
January 25th, 2011 at 2:01 pm
this is really interesting.i would like to do this as my project.so kindly send me the circuit diagram and complete details.
March 1st, 2011 at 11:24 am
i’m very much interested in doing this project
so kindly can you give the full details of the project including circuit diagram and pcb layout
really this is very interesting.
March 27th, 2011 at 2:35 pm
your project inspiring me to make it.so kindly can you give the full details of the project including circuit diagram and pcb layout. i’m also interested in other projects like this.then also send me those too on ” samey.kumar9@yahoo.com ”
thank you
May 27th, 2011 at 3:20 pm
hello,your project is very good.I want to make this project.
so give me information about ckt diagram.
do you programing in java for this project ? if yes then is it programing in c language ?
please solve my doubt and send details of project on
dipeshdhola0@gmail.com
thanks alot
July 27th, 2011 at 9:44 pm
I really liked ur project . CAN U PLS HELP ME … pls send me the full details of this project …my id is (soni.jaya70@yahoo.com)….thanx a lot ,…..
July 27th, 2011 at 9:45 pm
ur project is really nic… CAN U pls send me the full details of this project …my id is (soni.jaya70@yahoo.com)….thanx a lot ,…..
July 29th, 2011 at 12:55 pm
hi
i’m very much interested in this project and your project inspiring me.sir i wanna to make the project on flying robot with video recorder(camera) plz can u help me
my id is(seekforbharath@gmail.com)
July 29th, 2011 at 12:57 pm
so kindly can you give the full details of the project including circuit diagram and pcb layout
really this is very interesting.
August 7th, 2011 at 10:36 am
wat is the approx cost of this project
August 13th, 2011 at 11:27 pm
i am very much interested in doing this project
so kindly can you give the full details of the project including circuit diagram and pcb layout
really this is very interesting.
September 3rd, 2011 at 7:09 pm
wowwwwwwwwwwww …………….i like this project very much can u give me full details of this project……….. along with circuit diagram……………………………………… my mail id macharlasatish368@gmail.com waiting for ur mail………………………………… thank uuuuuu
September 4th, 2011 at 11:13 am
it is a good project. please send me details how i can start . nd all other component details.
regards.
vishal
vishalmahajan1990@yahoo.com
September 12th, 2011 at 8:37 pm
realy good project…….pls give me detail&circuit diagram……………plsss
September 21st, 2011 at 5:08 pm
please send me above project details so that even i can try out
September 28th, 2011 at 12:06 pm
Hi i want to do this project can u give me the full information about this project pls this is my humble request don’t reject pls:-)..
September 28th, 2011 at 6:14 pm
Hi this s very interesting project i want to do this project pls can u give me the full details and assembling information about this project pls it is my humble request:-)…
September 28th, 2011 at 6:26 pm
Hi this s very interesting project.i want to do dis project pls can u give me the full information and assembling details about dis project pls this s my humble request pls pls pls pls:-).
October 24th, 2011 at 3:03 pm
Hi it is a very interesting project i want to do implement this project….i try to find the DIY project but couldn’t find it….could u please send to me the full details and assembling information about this project if it is possible
this is my email address: aniessuahmad@gmail.com
October 26th, 2011 at 2:36 am
can u send me the circuit…i very interesting to use this idea for my final project.
thanx… email me : pdospno@gmail.com
October 31st, 2011 at 4:50 pm
Send me this project details
November 21st, 2011 at 1:06 pm
Sir,
I m final year engineering student. I was searching for this topic “Automatic Railway Gate Control & Track Switching” from very long time. Me and my friends hav selected this topic as our project. i want all the information regarding this topic like circuit diagram, source codes, components required to build the ckt and theory. plz send me the info on my e-mail testnow25@yahoo.com as soon as possible. thnx a lot.
December 7th, 2011 at 5:46 pm
This is cool man i love it…………
December 11th, 2011 at 4:52 pm
hi,brother
it’s really good project,could u give me ur circuit diagram to me,i’ll try to develop this project in my own idea,
email___kanna.india@gmail.com
thank-u
December 13th, 2011 at 3:58 pm
hey..dude
Feeling nice to do this project so can u provide most of information related to it i.e. Pcb layout and al that..plz yaar
December 28th, 2011 at 2:26 pm
[...] “JavaBot” LINE FOLLOWER ROBOT from Java, Indonesia [...]
January 27th, 2012 at 1:46 pm
hey hieee… its realy great..!! can u plz mail me the regarding information about JAVA BOT..!! CIRCUIT DIAGRAM AND JAVA PROGRAMING ETC..!!
THANKING UU..!!
nikhilshinde06@gmail.com