KY-012 37-1 13 Active buzzer module
After testing the KY-006 Passive buzzer module i wanted to test this KY-012 active buzzer.
The active buzzer continuously makes sound and only needs power to function.
Example for the KY-012 Active buzzer i found on internet did not function in my first test. I almost did think my buzzer module was not functioning well. The active buzzer only needs power i decided to wire Pin S directly to the +5V and Pin - to Ground of my Arduino. The result of this test was no sound! I reversed the polarity and the alarm sounded.
I don't know if the problem was my version of the KY-012 module. With S connected to ground and - connected to the Arduino control pin i could use the module!
Later i checked http://linksprite.com/wiki/index.php5?title=Advanced_Sensors_Kit_for_Arduino and they used a similar connection as i did. They had an additional connection;
middle pin to +5 V
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgS_TcdU3_TmV78Pp5qMx4qpC_2lTrAETrznc8SHqxqBiVM5c9yQftGRUVlGgxyFqrrvGb-sHxeuekj6D08YGpri2MkYHUGs4QxuAbNlgOoASA-uQCmUfibsfbR_NWbZbLSJ_QZ-_LFUhue/s320/JJ_KY012_B.jpg)
Hardware
- Pin - Arduino Pin 9
- Pin (middel) not connected (or +5 V )
- Pin S Arduino Ground
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhx6gtU-NZWvNL9RAXPD79E1RE7lt08CjWiFisv2VRdGYAem5-1VSS1dp3VfFgKOXjX198innggsy5vW5mjAPo5yl9wZ2pmN6-xiFwrUytRuqIUsYuEvZahPzbxqpFTVamEOWYC7lrMCnB_/s320/JJ_KY012_C.jpg)
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