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======Oak: Making Noise with the Buzzer======

This lesson will show you how to connect the 3.3v Active Buzzer to your Oak and make it beep morse code.

=====Components Used:=====

^ Part       ^ Quantity          ^Identification^
| Oak with soldered headers |1| |
|  Breadboard| 1| |
|  3.3v Active Buzzer | 1| |
|  M to M 30cm Jumper Wire| 2| Red, Black|

=====Concepts:=====

**Piezo Buzzers**: In this lesson we will be using a Piezo buzzer to make sound. We will be achieving this by turning it on and off, much like an [[oak:tutorials:leds|LED]].

{{:oak:tutorials:buzzerexample.jpg?direct&300|A piezo buzzer}}

A piezo buzzer is a sandwich of two different conductive metals. When voltage is applied to the two different metals it bends, creating waves in air - which we call sound. They are usually small and circular and can be found in anything that provides an annoying beep.

We can make a piezo buzzer beep like this in code:
<code>
 // turn pin 9 "on" by making the voltage HIGH)
  digitalWrite(1, HIGH);
</code>
Where digitalWrite(1, HIGH); means turn Pin1 fully on. Don't forget to turn it off again!

=====Circuit:=====

{{:oak:tutorials:buzzer.png?direct&200|Buzzer}}

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.

=====Code:=====

<code>

</code>

Explanation of code

=====Conclusion:=====

Where to go from here, potential uses, etc.

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