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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.
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Akfreak 2014-12-04 02:00:23 -08:00
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@ -20,13 +20,14 @@ 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.
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