2m3

About 2m3

2m3 is an open space of 2 metres in 3 dimensions. It represents a platform for artists who like to suprise themselves and a small audience. A performance starts with 2 minutes of action in 3 minutes of silence.With each artist goes a special beer to keep us all company for the night. This experimental snapshot takes place at home, every last friday of the month. http://2m3.be

Technical

Code

/* Code for driving a pendulum and detecting a small wooden block to fall This example code is in the public domain. Digital pin 12 has a solid state relay attached to it. Whenever the pin goes high it allow current to flow to the coil to give the passing pendulum a push Attached to interrupt pin 0(digital pin 2) is a hall effect sensor, which latches whenever a magnet passes over.

• /

int SolidState = 12; //switching solid state int Piezo = A0; //listen to piezo on Analog port 0 int PiezoValue = 0; const int thPiezo = 100; // threshold for piezo, if bigger then treshold switch of light int HallState = 0; //Status of hall effect sensor unsigned long timeON ; //moment of time that hall effect is triggered unsigned long timeOF ; //moment of time that coil is activated unsigned long currentTime; long timeDON = 0; //time that has passed since hall effect was triggered long timeDOF = 0; //time that has passed since coil was activated int timeOFa = 0; //some trick I had to come of long threshOn = 100; // milliseconds to pass before activating solid state relay to sending a push with coil long threshOf = 100; // milliseconds to pass before deactivating solid state relay

void setup() {

 // initialize serial communication at 9600 bits per second:
 Serial.begin(9600);

 pinMode(SolidState, OUTPUT); // make the SolidState's pin an output:
 digitalWrite(SolidState, LOW); // set SolidState pin LOW

   // adding attachInterrupt on digital pin 2, 
 // when this pin's state changes, the push function will be executed
 attachInterrupt(0, push, RISING);

}

// the loop routine runs over and over again forever: void loop() {

 unsigned long currentTime = millis();
 PiezoValue = analogRead(Piezo);
 //Serial.println(PiezoValue);
 if (PiezoValue > thPiezo){
   Serial.println(1000);
 }
 
 if (HallState == 0)
   {
   timeDOF = currentTime - timeOF;
   if (timeDOF > threshOf && timeOFa == 1)
       {
       digitalWrite(SolidState, LOW);
       Serial.println(2000);//2000 = solenoid off
       timeOFa = 0;
       }
   }
 else
   {
   timeDON = currentTime - timeON;
   if (timeDON > threshOn)
     {
     HallState = 0;
     digitalWrite(SolidState, HIGH);
     Serial.println(3000);//3000 = solenoid on
     timeOF = currentTime;
     timeOFa = 1;
     }
 }
 delay(100);

}

void push() {

 HallState = 1;
 timeON = currentTime;

}