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--- oak:tutorials:buzzer [2016/03/25 23:09]
nog3 Adding base content, code to be added.
+++ oak:tutorials:buzzer [2016/03/25 23:28]
nog3 [Circuit:]
@@ Line 22: / Line 22: @@
 We can make a piezo buzzer beep like this in code:
 <code>
- // turn pin 9 "on" by making the voltage HIGH)
+ // turn pin 1 "on" by making the voltage HIGH)
   digitalWrite(1, HIGH);
 </code>
@@ Line 32: / Line 32: @@
 Remember that when connecting a buzzer, you must pay attention to the (+) sign on the top of the buzzer casing. The (+) sign represents the positive connector and is where the red wire from pin 1 must go. If you get this backwards your buzzer may stop working.
+You will also want to unplug the buzzer until your Oak has finished uploading the test code, or it may get very noisy indeed!
 =====Code:=====
 <code>
+//set the buzzer pin
+int buzzer = 1;
+// the setup function runs once when you reset or power the board
+void setup() {
+  // initialize buzzer as an output.
+  pinMode(buzzer, OUTPUT);
+}
+// the loop function runs over and over again forever
+void loop() {
+  // make 3 dots to make an S
+  for (int a = 0; a < 3; a++) {
+    dot();
+  }
+  // wait 100 miliseconds after the first S
+  delay(100);
+  // make 3 dashes to make an o
+  for (int b = 0; b < 3; b++) {
+    dash();
+  }
+  // wait 100 miliseconds after the o
+  delay(100);
+  // make 3 dots to make an S
+  for (int c = 0; c < 3; c++) {
+    dot();
+  }
+  //wait 5 seconds before playing again
+  delay(5000);
+}
+// make a dot noise
+void dot()
+{
+  //turn on the buzzer
+  digitalWrite(buzzer, HIGH);
+  delay(100);
+  // turn off the buzzer
+  digitalWrite(buzzer, LOW);
+  delay(100);
+}
+// make a dash noise
+void dash()
+{
+  // turn on the buzzer
+  digitalWrite(buzzer, HIGH);
+  delay(300);
+  // turn off the buzzer
+  digitalWrite(buzzer, LOW);
+  delay(100);
+}
 </code>
-Explanation of code
+In this example, we create two separate functions //dot()// and //dash()// and use them in for loops to save us having to write the same code over and over again. We also use a variable //buzzer// to declare which pin we are using for the buzzer.
+//dot()// and //dash()// turn on and off the buzzer with different timings to simulate a morse code dot and dash using the //delay()// function which tells the Oak to pause for that many milliseconds.
 =====Conclusion:=====
-Where to go from here, potential uses, etc.
+With this newfound power, perhaps you could make an internet connected morse code system to read out important tweets or secret messages from your friends.

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