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Assignment: DC Motor: Actuation Assignment 1
Collaborators:
Description:
A DC motor sits under a turntable with a round drawing surface. When a pen is pressed against the turntable's surface, a photocell nearby occludes, activating the rotational motion of the turntable. A Potentiometer controls the rotational speed of the turntable.
Components List:
Notes:
The biggest challenge in creating this project was stuffing into the project enclosure. I decided to do away with the usual project breadboard and use half of a smaller, thin breadboard that I had laying around in my toolbox.
Apologies:
I sincerely apologize for using the RATT song "Round and Round" as the background music for my project video. I acknowledge that it is truly a horrible, horrible song. Maybe the worst song ever made.
Code used in this Assignment:
/*
* PhotoSpiroGraph Code
* Uses 2 analog inputs
*
*/
int potPin = 0; // select the input pin for the potentiometer
int photoPin = 1; // select the input pin for the photocell
int motorPin = 9; // select the pin for the Motor
int potVal = 0; // variable to store the value coming from the pot
int photoVal = 0; // variable to store value coming from the photocell
void setup() {
Serial.begin(9600);
}
void loop() {
potVal = analogRead(potPin); // read the value from the sensor, between 0 - 1024
photoVal = analogRead(photoPin); // read the value from the sensor, between 0 - 1024
Serial.print("PhotoCell: ");
Serial.println(photoVal);
Serial.print("Pot: ");
Serial.println(potVal);
Serial.println("-------------------");
if (photoVal < 45) { // If photocell gets occluded, then spin the turntable!!!
analogWrite(motorPin, potVal/4);
Serial.println("draw!");
} else {
analogWrite(motorPin, 0); // else, don't spin at all!
}
}