Add example: LedSynth

examples/Modulino_Knob/LedSynth/LedSynth/LedSynth.ino

@@ -0,0 +1,59 @@
+#include <Modulino.h>
+
+//Maximum and minimum encoder values
+#define KNOBMAX 7
+#define KNOBMIN 0
+
+//Modulino boards
+ModulinoKnob knob;
+ModulinoPixels leds;
+ModulinoBuzzer buzzer;
+
+void setup() {
+  //Inizialize modulino boards
+  Modulino.begin();
+  knob.begin();
+  knob.set(0);
+  buzzer.begin();
+  leds.begin();
+}
+
+int i;
+//Encoder value and button status
+int knobPosition = 0;
+bool knobClick = false;
+
+void loop() {
+  //Acquire current encoder value
+  knobPosition = knob.get();
+
+  /*Check if encoder value is outside of range
+  and if so keep it in range*/
+  if (knobPosition > KNOBMAX) {
+    knobPosition = KNOBMAX;
+  } else if (knobPosition <= KNOBMIN) {
+    knobPosition = KNOBMIN;
+  }
+
+  //Set to be lit the LED corresponding to encoder value
+  leds.set(knobPosition, RED, 100);
+
+  //Shut of the other LEDs
+  for (i = KNOBMIN; i <= KNOBMAX; i++) {
+    if (i != knobPosition) {
+      leds.clear(i);
+    }
+  }
+
+  //Lit the LED
+  leds.show();
+
+  //Check if encoder button is pressed
+  knobClick = knob.isPressed();
+
+  /*If the encoder button is pressed reproduce sound
+  with pitch equal to encoder value * 100Hz + 200 Hz*/
+  if (knobClick) {
+    buzzer.tone(knobPosition * 100 + 200, 10);
+  }
+}