PiezoSpeaker

Simple piezo speaker.

Info

The PiezoSpeaker class represents a simple piezo speaker that can be used to generate tones across a range of frequencies. They typically perform well between 1-5kHz but may go as high as 100kHz. Implements IToneGenerator.

The positive pin of the piezo speaker connects to a PWM capable pin on the Netduino and the negative pin connects to common/ground. A resistor can be placed in-line to reduce volume.

API

Constructors

public PiezoSpeaker(H.Cpu.PWMChannel pwmChannel)

Instantiates a new PiezoSpeaker on the specified PWMChannel.

Public Methods

public void PlayTone(float frequency. int duration = 0)

Use the PlayTone method to play a tone at a specific frequency. Optionally set the duration property to specify the length of time the tone is played in milliseconds.

If a duration is specified, the call to PlayTone will block until the tone is finished.

If a duration of 0 is set, a tone will start playing and the method will return. The tone will continue to play until StopTone is called.

public void StopTone()

If a tone is playing and was started with a duration of 0, StopTone will cause the PiezoSpeaker instance to stop playing. If a tone isn’t playing, StopTone has no effect.