Electrofriends

“JavaBot” LINE FOLLOWER ROBOT from Java, Indonesia

by Tahan Prahara | August 18th, 2009.
The line follower robot with wireless video camera.

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.

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.

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.

Figure3: Attach the wireless video camera to the JavaBot.

This project by Tahan Prahara, prahara_satria@yahoo.co.id

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11 Responses to “JavaBot” LINE FOLLOWER ROBOT from Java, Indonesia

  1. Brijesh

    hello
    this is very good project and mostly used in final projects

    Brijesh Arya
    EmTech Foundation

  2. alter

    bobo wala schematic

  3. balamurugan

    can u give full details of this project.Because i give it name for my final year project.

  4. Augustine

    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

  5. ann

    i really liked ur project very much can u give the details about it

  6. dhananjay

    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.

  7. dhananjay

    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

  8. mohan

    hi . this s really cool . can u pl send the project details especially the pcb layout to my mail id ?

  9. mohan

    hi . this s really cool . can u pl send the project details especially the pcb layout to my mail id ? mohancarthik@gmail.com

  10. ankush

    i like your project plz give me some details about it

  11. banti verma

    sir i wanna to complete the project on flying robot plz send me detail…

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