Essai de découpe de prisme à la découpeuse laser.

Banc ad hoc en OpenSCAD :

$fn=10;
difference() { union () { cube([15,40,3]);
translate([0,0,3]) cube([3,40,15]);
translate([12,0,3]) cube([3,40,15]);
} ;
translate([1  ,8,5]) cube([13,3,15]);
}
translate([0,0,3])
difference () { cube([15,3,15]); rotate ([90,0,0]) translate([7.5,10,-5]) cylinder(h=6, d=5); 
}

Programme Arduino LED RGB :

/*
RGB
  */

int RED = 6;
int GREEN = 5;
int BLUE = 3;

void setup() {
  pinMode(RED, OUTPUT);
  pinMode(GREEN, OUTPUT);
  pinMode(BLUE, OUTPUT);
}

// the loop function runs over and over again forever
void loop() {
  digitalWrite(RED, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(RED, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);                       // wait for a second
  
  digitalWrite(GREEN, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(GREEN, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);      

       
  digitalWrite(BLUE, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(BLUE, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);           
}