more cleaning

examples/simple-pwm-led-audio/pwm-led-audio.ino

@@ -1,6 +1,7 @@
 /*
   LED PWM
   Uses 2 pots to control the duty cycle of a Pulse Width Modulation
+  with resulting values used to set both the LED and audio signal
   
   <---- pot 0 ---->           <---- pot 0 ---->
                   |           |               |
@@ -12,7 +13,6 @@
 #define LED     (13)
 #define POT_1   (0)
 #define POT_2   (1)
-#define POT_3   (2)
 #define SPEAKER (11)
 
 float delay_on;
@@ -24,7 +24,7 @@ void setup() {
 	// Pin 13 has an LED connected on the nano board:
 	pinMode(LED, OUTPUT);
         // initialize Pin 11 as audio out
-        pinMode(LED, SPEAKER);
+        pinMode(SPEAKER, OUTPUT);
 }
 
 void loop() {
@@ -38,18 +38,11 @@ void loop() {
         delay_on  = 1023 - analogRead(POT_1);
         delay_off = 1023 - analogRead(POT_2);
 
-        // We also read pot 3 value that we will use to control a bit
-        // the delay to reach audible range
-        //delay_div = 1023 - analogRead(POT_3);
-        //
-        // But meergranen 1.0
-        delay_div = analogRead(POT_3);
-
         // Parameters for the PWM
         digitalWrite(LED, HIGH);        // turn the LED on
-        digitalWrite(SPEAKER, HIGH);        // turn the LED on
-        delay(delay_on/delay_div);                // wait for delay_on ms
+        analogWrite(SPEAKER, 255);      // set max audio signal
+        delay(delay_on);                // wait for delay_on ms
         digitalWrite(LED, LOW);         // turn the LED off
-        digitalWrite(SPEAKER, LOW);         // turn the LED off
-        delay(delay_off/delay_div);               // wait for delay_off ms
+        analogWrite(SPEAKER, 0);        // audio flat line
+        delay(delay_off);               // wait for delay_off ms
 }

examples/simple-pwm-led/pwm-led.ino

@@ -0,0 +1,41 @@
+/*
+  LED PWM
+  Uses 2 pots to control the duty cycle of a Pulse Width Modulation
+  
+  <---- pot 0 ---->           <---- pot 0 ---->
+                  |           |               |
+                  |           |               |
+                  |           |               |
+                  <-- pot 1 -->               <--- ...
+*/
+
+#define LED (13)
+#define POT_1 (0)
+#define POT_2 (1)
+
+int delay_on;
+int delay_off;
+
+void setup() {                
+	// initialize the digital pin as an output.
+	// Pin 13 has an LED connected on the nano board:
+	pinMode(LED, OUTPUT);     
+}
+
+void loop() {
+        // We read the value of the pots at the beginning of the loop
+        // and store them as integer variables (declared at the top)
+        //delay_on  = analogRead(POT_1);
+        //delay_off = analogRead(POT_2);
+        //
+        // But in meergranen PCB 1.0, the pots are wired the wrong way
+        // So we need to adjust that :)
+        delay_on  = 1023 - analogRead(POT_1);
+        delay_off = 1023 - analogRead(POT_2);
+
+        // Parameters for the PWM
+        digitalWrite(LED, HIGH);        // turn the LED on
+        delay(delay_on);                // wait for delay_on ms
+        digitalWrite(LED, LOW);         // turn the LED off
+        delay(delay_off);               // wait for delay_off ms
+}