Tankah – remote controlled tank

Since I’ve started messing with robotics that I wanted to build a tank, and finally that moment arrived when two Tamiya thread kits and a Twin Motor Gearbox arrived.

Everything started with a sketch:

And as soon as I decided what I wanted, the assemble process has begun.
I have some plastic sheets laying around and I thought they would be perfect to hold all the hardware.

The chassis:

Meanwhile the replacement motors from Pololu arrived and I soldered the caps to remove motor noise.
The ones that came with the twin gear box are very noisy (electrically speaking)

This is the design in an almost final phase:

Later I replaced the plastic things for wood, and I used polymorph for the first time, it´s the best material I have seen in the last decades.

The brains (Xbee, Arduino and my custom motor driver with L293D):

When all the things got in place it was time for a test drive through some obstacles..
I figured that it needs some kind of stabilizer.. otherwise it won´t climb more difficult obstacles, OR it may flip around… (I think i´m just having an idea for another bot)

and… this was the solution I came up with  :D

I placed an “arm” on the back, it stops the tank from flipping over when its climbing stuff.

It works like a charm  :-)

It´s a lot of fun to drive this thing!! :-)   still editing the video…

8 thoughts on “Tankah – remote controlled tank”

  1. Hi,
    I love this little tankbot!
    Could you please help me out but letting me use your code??
    I just want the basic’s for controlling the twin motors, etc…
    I learn from looking and rewriting the code.

    Thank you!

  2. Hello friend!
    To control two motors you will need an h-bridge circuit, and here´s a sample code:

    // – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – VARIABLES

    int motorSpeed = 150; // motor speed – from 0 to 255;

    // the L293D H-bridge takes two outputs from the Arduino to control each motor.
    int motor1_Pin0 = 11;
    int motor1_Pin1 = 10;

    int motor2_Pin0 = 6;
    int motor2_Pin1 = 5;

    // – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – SETUP
    void setup() {

    // set Arduino pins as outputs
    pinMode(motor1_Pin0, OUTPUT);
    pinMode(motor1_Pin1, OUTPUT);

    pinMode(motor2_Pin0, OUTPUT);
    pinMode(motor2_Pin1, OUTPUT);

    delay(500);
    }

    // – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – LOOP
    void loop() {

    // HIGH / LOW

    digitalWrite(motor1_Pin0, HIGH);
    digitalWrite(motor1_Pin1, LOW);

    digitalWrite(motor2_Pin0, HIGH);
    digitalWrite(motor2_Pin1, LOW);

    delay (1000);

    digitalWrite(motor1_Pin0, LOW);
    digitalWrite(motor1_Pin1, HIGH);

    digitalWrite(motor2_Pin0, LOW);
    digitalWrite(motor2_Pin1, HIGH);

    delay (1000);

    // PWM

    analogWrite(motor1_Pin0, motorSpeed);
    digitalWrite(motor1_Pin1, LOW);

    analogWrite(motor2_Pin0, motorSpeed);
    digitalWrite(motor2_Pin1, LOW);

    delay (1000);

    digitalWrite(motor1_Pin0, LOW);
    analogWrite(motor1_Pin1, motorSpeed);

    digitalWrite(motor2_Pin0, LOW);
    analogWrite(motor2_Pin1, motorSpeed);

    delay (1000);

    }

  3. Perfect project, so genius!!!

    I have 2 questions
    First: 1 want to know how the value of the caps
    Second: Can you send me the source code

    Thank you !

  4. up you told “I soldered the caps to remove motor noise.”
    it’s because, i soldered 3 caps in the motor, but didn’t sold the problem, the motors generates too much noise, and it makes stop the circuit

    you understand my problem?

    I using other motors, that generates less noise, but don’t have the same power that other motors

    thanks

  5. I see!! motor noise is such a pain.. if you are using the tamiya gear box you can replace the motor for a noise clean motor: http://www.pololu.com/catalog/product/1117 – I strongly advice it!!
    For the caps value check the second schematic here: http://lab.guilhermemartins.net/2009/01/29/l293d-custom-motor-driver/

    If your motors are stopping the circuit they might be draining to much power from your batteries and are doing a cold reset on the MCU.. Try to add a 4700uF cap on the power supply connections, check here: http://letsmakerobots.com/node/18068. I am doing the same here: http://lab.guilhermemartins.net/2010/03/16/motoruino-action/

    Hope it helps

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