Assignment: Input / Output Coincidence Lab Assignment

Collaborators:

Assignment: Input / Output Coincidence Lab Assignment
Collaborators:

Assignment: Input / Output Coincidence Lab Assignment
Collaborators: sohyeong

assignment: to design an object where input/output occur in the same place.

solution: a pinwheel that spins when you apply pressure to it.

ingredients:

arduino/breadboard/wires/resistor
1 FSR
1 Servo
wooden dowel
paper
tape
pin

picture:

video link:

http://video.google.com/videoplay?docid=2751567672845780243&hl=en

code: we used the servo with pot control (without modifications)

/*
* Servo with Potentiometer control
* Theory and Practice of Tangible User Interfaces
* October 11 2007
*/

int servoPin = 7;      // Control pin for servo motor
int potPin   = 0;      // select the input pin for the potentiometer

int pulseWidth = 0;    // Amount to pulse the servo
long lastPulse = 0;    // the time in millisecs of the last pulse
int refreshTime = 20;  // the time in millisecs needed in between pulses
int val;               // variable used to store data from potentiometer

int minPulse = 500;   // minimum pulse width

void setup() {
pinMode(servoPin, OUTPUT);  // Set servo pin as an output pin
pulseWidth = minPulse;      // Set the motor position to the minimum
Serial.begin(9600);         // connect to the serial port
Serial.println("servo_serial_better ready");
}

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

if (val > 0 && val <= 999 ) {
pulseWidth = val*2 + minPulse;  // convert angle to microseconds

Serial.print("moving servo to ");
Serial.println(pulseWidth,DEC);

}
updateServo();   // update servo position
}

// called every loop().
void updateServo() {
// pulse the servo again if the refresh time (20 ms) has passed:
if (millis() - lastPulse >= refreshTime) {
digitalWrite(servoPin, HIGH);   // Turn the motor on
delayMicroseconds(pulseWidth);  // Length of the pulse sets the motor position
digitalWrite(servoPin, LOW);    // Turn the motor off
lastPulse = millis();           // save the time of the last pulse
}
}