atbetaflight/docs/Buzzer.md

# Buzzer

Cleanflight supports a buzzer which is used for the following purposes, and more:

 * Low Battery alarm (when battery monitoring enabled)
 * Notification of calibration complete status.
 * AUX operated beeping - useful for locating your aircraft after a crash.
 * Failsafe status.

Buzzer is enabled by default on platforms that have buzzer connections.

## Types of buzzer supported

The buzzers are enabled/disabled by simply enabling or disabling a GPIO output pin on the board.
This means the buzzer must be able to generate its own tone simply by having power applied to it.

Buzzers that need an analog or PWM signal do not work and will make clicking noises or no sound at all.

Examples of a known-working buzzers.

 * [Hcm1205x Miniature Buzzer 5v](http://www.rapidonline.com/Audio-Visual/Hcm1205x-Miniature-Buzzer-5v-35-0055)
 * [5V Electromagnetic Active Buzzer Continuous Beep](http://www.banggood.com/10Pcs-5V-Electromagnetic-Active-Buzzer-Continuous-Beep-Continuously-p-943524.html)
 * [Radio Shack Model: 273-074 PC-BOARD 12VDC (3-16v) 70DB PIEZO BUZZER](http://www.radioshack.com/pc-board-12vdc-70db-piezo-buzzer/2730074.html#.VIAtpzHF_Si)

## Connections

### Naze32

Connect a supported buzzer directly to the BUZZ pins. Observe polarity. Also if you are working with flight controller outside of a craft, on a bench for example, you need to supply 5 volts and ground to one of the ESC connections or the buzzer will not function.


### CC3D

Buzzer support on the CC3D requires that a buzzer circuit be created to which the input is PA15.
PA15 is unused and not connected according to the CC3D Revision A schematic.
Connecting to PA15 requires careful soldering.

See the [CC3D - buzzer circuit.pdf](Wiring/CC3D - buzzer circuit.pdf) for details.
Normalize all the line endings 2014-09-15 15:40:17 -07:00			`# Buzzer`

			`Cleanflight supports a buzzer which is used for the following purposes, and more:`

Various formatting and typographic fixes 2015-01-03 15:53:24 -08:00			`* Low Battery alarm (when battery monitoring enabled)`
			`* Notification of calibration complete status.`
			`* AUX operated beeping - useful for locating your aircraft after a crash.`
			`* Failsafe status.`
Normalize all the line endings 2014-09-15 15:40:17 -07:00
			`Buzzer is enabled by default on platforms that have buzzer connections.`

			`## Types of buzzer supported`

			`The buzzers are enabled/disabled by simply enabling or disabling a GPIO output pin on the board.`
Various formatting and typographic fixes 2015-01-03 15:53:24 -08:00			`This means the buzzer must be able to generate its own tone simply by having power applied to it.`
Normalize all the line endings 2014-09-15 15:40:17 -07:00
Various formatting and typographic fixes 2015-01-03 15:53:24 -08:00			`Buzzers that need an analog or PWM signal do not work and will make clicking noises or no sound at all.`
Normalize all the line endings 2014-09-15 15:40:17 -07:00
Formatting, links added, added supported buzzer 2014-11-14 04:45:16 -08:00			`Examples of a known-working buzzers.`
Normalize all the line endings 2014-09-15 15:40:17 -07:00
Formatting, links added, added supported buzzer 2014-11-14 04:45:16 -08:00			`* [Hcm1205x Miniature Buzzer 5v](http://www.rapidonline.com/Audio-Visual/Hcm1205x-Miniature-Buzzer-5v-35-0055)`
			`* [5V Electromagnetic Active Buzzer Continuous Beep](http://www.banggood.com/10Pcs-5V-Electromagnetic-Active-Buzzer-Continuous-Beep-Continuously-p-943524.html)`
Update Buzzer.md I added information to help anyone who runs into the same problem I did, the buzzer not functioning after trying multiple devices. I researched and saw you need to have 5v power to the board. The ESC connection is a simple place to power the board when working on the flight controller on a bench. This allows you to use the buzzer for conformations. Please see added text and link to a Radio Shack (local US electronics retailer) buzzer. 2014-12-04 02:00:23 -08:00			`* [Radio Shack Model: 273-074 PC-BOARD 12VDC (3-16v) 70DB PIEZO BUZZER](http://www.radioshack.com/pc-board-12vdc-70db-piezo-buzzer/2730074.html#.VIAtpzHF_Si)`
Normalize all the line endings 2014-09-15 15:40:17 -07:00
CC3D - Add Buzzer support to PA15. See Docs for details. 2014-09-19 13:35:30 -07:00			`## Connections`

			`### Naze32`

Update Buzzer.md I added information to help anyone who runs into the same problem I did, the buzzer not functioning after trying multiple devices. I researched and saw you need to have 5v power to the board. The ESC connection is a simple place to power the board when working on the flight controller on a bench. This allows you to use the buzzer for conformations. Please see added text and link to a Radio Shack (local US electronics retailer) buzzer. 2014-12-04 02:00:23 -08:00			`Connect a supported buzzer directly to the BUZZ pins. Observe polarity. Also if you are working with flight controller outside of a craft, on a bench for example, you need to supply 5 volts and ground to one of the ESC connections or the buzzer will not function.`

CC3D - Add Buzzer support to PA15. See Docs for details. 2014-09-19 13:35:30 -07:00
			`### CC3D`

			`Buzzer support on the CC3D requires that a buzzer circuit be created to which the input is PA15.`
			`PA15 is unused and not connected according to the CC3D Revision A schematic.`
			`Connecting to PA15 requires careful soldering.`

Fix broken link in Buzzer.md. 2015-01-12 15:50:55 -08:00			`See the [CC3D - buzzer circuit.pdf](Wiring/CC3D - buzzer circuit.pdf) for details.`