Electronic – Buzzer Driver Circuit


Recently, I have ordered smt-0440-t-r buzzer from Mouser.

Circuit is as shown in figure.

enter image description here

Microcontroller pin transmits square wave of 4kHz as mentioned in the datasheet. However, the sound isn't audible. When I am at a distance of 1-2cm from the buzzer, I am hearing very low intensity sound. Any fixes?

Best Answer

How is your hearing and what is your age? If you are 45 years old then your normal hearing loss at 4kHz is -23dB so you will barely hear it. Hearing aids like mine (I am 73 soon) will fix the loss.enter image description here