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problems with speaker noise

 
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kahbee



Joined: 09 Jun 2010
Posts: 6

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problems with speaker noise
PostPosted: Fri Jun 18, 2010 2:21 am     Reply with quote
Greetings. I use LM386 to amplify my speaker and I follow the connection in the datasheet. Yet, there are humming noise. Do anyone can help me solve this? Sad
thanks in advance
dyeatman



Joined: 06 Sep 2003
Posts: 1933
Location: Norman, OK

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PostPosted: Fri Jun 18, 2010 5:51 am     Reply with quote
Sounds like a power supply problem to me. However, this is a CCS
compiler rather than an electronics forum so that question would be
better asked in alt.electronics or a similar forum.
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SherpaDoug



Joined: 07 Sep 2003
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PostPosted: Fri Jun 18, 2010 1:40 pm     Reply with quote
Most likely a power supply problem. Could the hum be at the D/A sample rate or PWM frequency?
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kahbee



Joined: 09 Jun 2010
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PostPosted: Fri Jun 18, 2010 11:15 pm     Reply with quote
ok. thanks everyone
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