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Buzzer/Speaker Circuit Suggesion for Bluetooth LE Device

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sakibnaz

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Hi.

I want to generate some RING Type Alert for my project. My Project is a Bluetooth LE Device where I need to play RING Alert. I'll use Nordic nRF51 BLE MCU.

I used before SMT Transducer before but found sound is very low. Hard to hear.

http://www.puiaudio.com/product-detail.aspx?categoryId=2&partnumber=SMT-0540-S-R

Now my target is to improve the sound level of RING. My ques are:

- If I use a Piezo Buzzer (Around 20mm Diameter) will it give Better sound level?

- My nRF51 MCU will run from 3V Cell Battery. For Buzzer will it be good to connect Buzzer will direct MCU GPIO Pin? Or I need to use a NPN Transistor based Circuit?

- If anyone have experienced a good Buzzer/Speaker please share the Part Number.

Thank you.

Regards.
 

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