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Topic: Klicking sound (Read 478 times) previous topic - next topic


Apr 30, 2017, 04:44 pm Last Edit: Apr 30, 2017, 04:58 pm by NomaamSnowman
Hello i am trying to increase the sound volume from the smal buzzer so i try to use a PAM8403 to amplify two small 5v speakers. But i cant get rid off a high frequency ticking sound. any one thats have the same problem?
The LCD display also flickers


An RC-filter will help.


. any one thats have the same problem?
Yes just about everyone.
Is that your "drawing"? I have seen it before posted by someone else. It was rubbish then and hasn't improved.

No decoupling capacitors, bad layout and no reconstruction filter.


A USB power source will provide upto 0.5A, that amplifier can draw perhaps 1A or more driving two speakers
at high volume.  What impedance are the speakers?
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]

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