2014-09-15 15:40:17 -07:00
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# Buzzer
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Cleanflight supports a buzzer which is used for the following purposes, and more:
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Low Battery alarm (when battery monitoring enabled)
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Notification of calibration complete status.
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AUX operated beeping - useful for locating your aircraft after a crash.
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Failsafe status.
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Buzzer is enabled by default on platforms that have buzzer connections.
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## Types of buzzer supported
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The buzzers are enabled/disabled by simply enabling or disabling a GPIO output pin on the board.
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This means the buzzer must be able to generate it's own tone simply by having power applied to it.
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Buzzers that need an analogue or PWM signal do not work and will make clicking noises or no sound at all.
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2014-11-14 04:45:16 -08:00
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Examples of a known-working buzzers.
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2014-09-15 15:40:17 -07:00
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2014-11-14 04:45:16 -08:00
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* [Hcm1205x Miniature Buzzer 5v](http://www.rapidonline.com/Audio-Visual/Hcm1205x-Miniature-Buzzer-5v-35-0055)
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* [5V Electromagnetic Active Buzzer Continuous Beep](http://www.banggood.com/10Pcs-5V-Electromagnetic-Active-Buzzer-Continuous-Beep-Continuously-p-943524.html)
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2014-09-15 15:40:17 -07:00
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2014-09-19 13:35:30 -07:00
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## Connections
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### Naze32
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2014-11-14 04:45:16 -08:00
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Connect a supported buzzer directly to the BUZZ pins. Observe polarity.
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2014-09-19 13:35:30 -07:00
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### CC3D
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Buzzer support on the CC3D requires that a buzzer circuit be created to which the input is PA15.
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PA15 is unused and not connected according to the CC3D Revision A schematic.
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Connecting to PA15 requires careful soldering.
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2014-11-14 04:45:16 -08:00
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See the [CC3D - buzzer circuir.pdf](Wiring/CC3D - buzzer circuir.pdf) for details.
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