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
Hardware
- Pin - Arduino Pin 9
- Pin (middel) not connected (or +5 V )
- Pin S Arduino Ground
