Interactive window

Banik pičo

http://vimeo.com/8196236

Designer's page - a few more words about technologies used in the HBO window

Hardware necessary

Item	Qnt.	HBO solution *	our solution	Est. price (czk)	note
fans	8	[Air King industrial grade fans]	[[ | PC ones]]
range sensors	8	[Sharp]	[[ | same]]
control board	1	[[ | Arduino Duemilanove]]	[[ | custom ATmega8 brd]]
power switching board	1	[| National Control Devices relay board]	[[ | custom MOSFET board]]
snow		[[ | paper]]	[[ | to be discussed]]
walls		[[ | LED projection]]	[[ | none yet]]

/* based on link

Illustration

int vetrak = 9;
int adc_senzor = 0;
float senzor = 0.0;
int pwm = 0;



int eliminace_okoli = 30; // random sracky se senzoru

float minimal_pwm = 160; // pro kazdy vetrak jiny!

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly: 
  adc_senzor = analogRead(A0);
  //senzor da max 3.2V, tzn prepocitat na plnej rozsah.
  // 5/3.2 = 1.5635
// 3.2V pode datasheetu, coz neni zas tak uplne pravdal. Proto to je jen 1.30

  if (adc_senzor*1.30 > 1023) {
      senzor = 1023;
      Serial.println("preteceni u senzor");
  } else {
    senzor = adc_senzor*1.30;
    
  }
    pwm = senzor/4; // ADC je do 1024, ale PWM jen do 256
    
    if (pwm < eliminace_okoli) {
      pwm = 0; // pri takto nizkych hodnotach povazujeme ze pred vylohou nikdo nestoji
    }
    
    if (pwm > 254) {

      Serial.println("preteceni u pwm"); // kdyby neco, tak nic
    } 
    
    //analogWrite(9, pwm);
  
  /* 
  zjsiteni kolik potrebuje vetrak na roztoceni
  for (int i=0; i <= 250; i=i+10){
      Serial.println(i); 
      analogWrite(9, i);
      delay(1000);
   } 
 */  
  
 //  Serial.println(pwm);
  //delay(1000);
   analogWrite(9, pwm);
  

}