More programming

2006-09-28T09:51:00.000+02:00

Today we wrote two programs:

The first one has four LEDs that light one at a time, according to the light that hits a light sensor.

/*
Light scale
*/

int analogValue = 0; // variable to hold the analog value
int ledPin1 = 6;
int ledPin2 = 7;
int ledPin3 = 8;
int ledPin4 = 9;

void setup() { // open the serial port at 9600 bps:
Serial.begin(9600);
pinMode(ledPin1, OUTPUT);
pinMode(ledPin2, OUTPUT);
pinMode(ledPin3, OUTPUT);
pinMode(ledPin4, OUTPUT);
}

void loop() { // read the analog input on pin 0:
analogValue = analogRead(0);
// print it out in many formats:
Serial.print("analog val: "); // print as an ASCII-encoded decimal
Serial.println(analogValue);

if (analogValue>500) {
digitalWrite(ledPin1, HIGH);

} else {
digitalWrite(ledPin1, LOW);
}

if (analogValue<500 && analogValue>300) {
digitalWrite(ledPin2, HIGH);
} else {
digitalWrite(ledPin2, LOW);
}

if (analogValue<300 && analogValue>100) {
digitalWrite(ledPin3, HIGH);
} else {
digitalWrite(ledPin3, LOW);
}

if (analogValue<100) {
digitalWrite(ledPin4, HIGH);
} else {
digitalWrite(ledPin4, LOW);
}

// delay 10 milliseconds before the next reading:
delay(100);
}

----------

The other program makes six LEDs in a circle light one at a time, thus making circles. Between each blink the light sensor registers the light amount, and the delay between each blink is a fifth of that value. Therefore the light moves is circles faster and faster as the surrounding gets darker and darker:

/*
Speeding circles
*/

int analogValue = 0; // variable to hold the analog value
int number[][6] = { {1, 0, 0, 0, 0, 0}, {0, 1, 0, 0, 0, 0}, {0, 0, 1, 0, 0, 0}, {0, 0, 0, 1, 0, 0}, {0, 0, 0, 0, 1, 0}, {0, 0, 0, 0, 0, 1} } ;
int ledpins[] = {11, 10, 2, 3, 4, 5} ;

void setup() { // open the serial port at 9600 bps:
Serial.begin(9600);
for(int i = 0; i < 8; i++)
{
pinMode(ledpins[i], OUTPUT) ;
}
}

void loop() { // read the analog input on pin 0:

for(int i = 0; i < 6; i++) {
if (number[0][i] == 1) {
digitalWrite(ledpins[i], HIGH) ;
}
else {
digitalWrite(ledpins[i], LOW) ;
}
}

analogValue = analogRead(0);
// print it out in many formats:
Serial.print("analog val: "); // print as an ASCII-encoded decimal
Serial.println(analogValue);
delay(analogValue/5);

for(int i = 0; i < 6; i++) {
if (number[1][i] == 1) {
digitalWrite(ledpins[i], HIGH) ;
}
else {
digitalWrite(ledpins[i], LOW) ;
}
}

analogValue = analogRead(0);
// print it out in many formats:
Serial.print("analog val: "); // print as an ASCII-encoded decimal
Serial.println(analogValue);
delay(analogValue/5);

for(int i = 0; i < 6; i++) {
if (number[2][i] == 1) {
digitalWrite(ledpins[i], HIGH) ;
}
else {
digitalWrite(ledpins[i], LOW) ;
}
}

analogValue = analogRead(0);
// print it out in many formats:
Serial.print("analog val: "); // print as an ASCII-encoded decimal
Serial.println(analogValue);
delay(analogValue/5);

for(int i = 0; i < 6; i++) {
if (number[3][i] == 1) {
digitalWrite(ledpins[i], HIGH) ;
}
else {
digitalWrite(ledpins[i], LOW) ;
}
}

analogValue = analogRead(0);
// print it out in many formats:
Serial.print("analog val: "); // print as an ASCII-encoded decimal
Serial.println(analogValue);
delay(analogValue/5);

for(int i = 0; i < 6; i++) {
if (number[4][i] == 1) {
digitalWrite(ledpins[i], HIGH) ;
}
else {
digitalWrite(ledpins[i], LOW) ;
}
}

analogValue = analogRead(0);
// print it out in many formats:
Serial.print("analog val: "); // print as an ASCII-encoded decimal
Serial.println(analogValue);
delay(analogValue/5);

for(int i = 0; i < 6; i++) {
if (number[5][i] == 1) {
digitalWrite(ledpins[i], HIGH) ;
}
else {
digitalWrite(ledpins[i], LOW) ;
}
}

analogValue = analogRead(0);
// print it out in many formats:
Serial.print("analog val: "); // print as an ASCII-encoded decimal
Serial.println(analogValue);
delay(analogValue/5);

}

Day #2

2006-09-26T20:20:00.000+02:00

Today we experimented more with the circuit board, and we also got a bigger one, a [paste name here] with which we could add more components.

First we used a LED display with seven lines (and a dot) to display numbers. We managed to make it count from zero to nine. You'll find the code here: www.automatic.se/SensingMatter/Algorithm. Then we added two more LED displays and made it spell "hei". That's norwegian for "hi". Neat.

After a while we exchanged the LED displays with five LEDs (red ones). With the codes you find here we made them blink back and forth, like K.I.T.T. in Knight Rider.

Then we had the LEDs blink first slowly and then faster and faster with this code (we wrote it mostly ourselves):

----------

/*Blinking LED
*/

int k = 0;

void setup()
{
for(int j = 0; j < 5; j++) {
pinMode(j+2, OUTPUT); // sets the digital pin as output
}
}

void loop()
{
for(int i = 1; i < 50; i++) {
k=i;
for(int j = 0; j < 5; j++) {
digitalWrite(j+2, HIGH); // sets the LED on
}
delay(100);

for(int j = 0; j < 5; j++) { // waits for a second
digitalWrite(j+2, LOW); // sets the LED off
}
delay(1000/k); // waits for a second
}
}

----------

Finally we tried to use the light sensors and some other sensor, but we just had time to play for them a bit before we had to go home.

End day #1

2006-09-25T23:43:00.000+02:00

Today we managed to programme the i/o-board to turn on and off a LED at different speeds/intervals. It was fun.

Computer

2006-09-25T14:19:00.000+02:00

This is what they once thought the computer would be like in the year 2004:

...and this is what it looks like today:

Getting started

2006-09-25T14:02:00.000+02:00

Hooray, it's working. Go team!

sensing doesn't matter

More programming

Day #2

End day #1

Computer

Getting started