Brownian Motion

Description:

After a lot of trial and error, I finally was able to succesfully demonstrate a kind of brownian motion using the dc motor. At the outset it seemed pretty easy to implement, using strong magnets on the motor and a set of etallic bearings placed in a container at some distance from the rotating magnets to influence motion. But as I started implementing it, it became quite complex. The system was delicate and everything depended on getting that perfect balance.

I have attached a link to the video. 

Materials:

Metallic bearings

2 Strong magnets

1 DC motor

1 POT

1 resisitor (10K)

1 diode

1 Transistor

1 power supply 

1 Arduino Uno

Code:

/*

 * one pot fades one motor

 * modified version of AnalogInput

 * by DojoDave <http://www.0j0.org>

 * http://www.arduino.cc/en/Tutorial/AnalogInput 

 * Modified again by dave

 */

int potPin = 0;   // select the input pin for the potentiometer

int motorPin = 9; // select the pin for the Motor

int val = 0;      // variable to store the value coming from the sensor

void setup() {

  Serial.begin(9600);

}

void loop() {

  val = analogRead(potPin);    // read the value from the sensor, between 0 - 1024

  Serial.println(val);

  analogWrite(motorPin, val/4); // analogWrite can be between 0-255

}