Bumper car with limit switch

#1

Hello makeblock and fans,

I have been unable to play with makeblock for several months, but hopefully I am back now. I had some time yesterday and basically had to re-discover everything again :blush:

Below a very simple car that uses a bumper controlled by two limit switches.

limit_switch_bumper.jpg1024x779 187 KB

Here is the code (it is very simple, almost copy/paste from the demo files):

#include <Makeblock.h>
#include <Arduino.h>
#include <SoftwareSerial.h>
#include <Wire.h>

MeDCMotor motor1(M1);
MeDCMotor motor2(M2);
MeInfraredReceiver infraredReceiverDecode(PORT_4); 
MeLimitSwitch limitSwitch1(PORT_6); 
MeLimitSwitch limitSwitch2(PORT_7); 

uint8_t motorSpeed = 255;

void setup()
{
    infraredReceiverDecode.begin();
}

void loop()
{
    if(infraredReceiverDecode.available())
    {
        switch(infraredReceiverDecode.read())
        {
            case IR_BUTTON_PLUS: motor1.run(-motorSpeed) ; motor2.run(-motorSpeed); break;
            case IR_BUTTON_MINUS: motor1.run(motorSpeed) ; motor2.run(motorSpeed); break;
            case IR_BUTTON_PLAY: motor1.stop() ; motor2.stop() ; break;
            default:break;
        }
    }
    if(!limitSwitch1.touched()){ motor1.run(motorSpeed) ; motor2.run(motorSpeed); delay(1000);}
    if(!limitSwitch2.touched()){ motor1.run(motorSpeed) ; motor2.run(motorSpeed); delay(1000);}
}

A detail of the bumper (I only used makeblock parts):

limit_switch.jpg900x675 164 KB

I hope to find some time soon to do more interesting stuff!

Ah by the way, the Infrared works really good now !!

cheers,
paul

#2

The idea was to build a car that would automatically back away when hitting a wall.

cheers,
paul

#3

Clever design, paulcobbaut:). Limitswitch + tyre are very smart. Maybe we can use it on our football robot.

BTW, we have hold twice Hackmarathon recently and we got lots of interesting projects. I think you would like them.

#4

There is a guy who made a bumper which is very similar with yours. You may like it. http://forum.makeblock.cc/t/new-product-testing-mechanical-parts/449

#5

Thank You Paulcobbaut.