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

Text

<syntaxhighlight lang="c"> 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);
 

} </syntaxhighlight>