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Noise sound and itching

 
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kevo1tinh



Joined: 27 May 2016
Posts: 3

PostPosted: Fri May 27, 2016 2:50 am    Post subject: Noise sound and itching Reply with quote

I use standard SCHEMATIC from datasheet. Sound is noise and itching. I change R,C at IN, OUT but no result. Using internal and external program. I send mail this sound (support@spinsemi.com). how to solve it.
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frank



Joined: 19 Oct 2005
Posts: 958

PostPosted: Fri May 27, 2016 9:01 am    Post subject: Reply with quote

Support has not received any email with a sound file, it may have been too big, please post it at a site we can access it like dropbox.

Pictures of your PCB and details on how it is connected would help.
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Frank Thomson
Experimental Noize
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kevo1tinh



Joined: 27 May 2016
Posts: 3

PostPosted: Fri May 27, 2016 8:34 pm    Post subject: Reply with quote

picture:
https://www.facebook.com/photo.php?fbid=475587642639432&set=pcb.475589409305922&type=3&theater
Sound: i resend to email support@spinsemi.com
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frank



Joined: 19 Oct 2005
Posts: 958

PostPosted: Sat May 28, 2016 10:29 am    Post subject: Reply with quote

Again we did not receive the sound file, please post it at some place like dropbox and send us a link.

Looking at the pictures you do not have a good ground plane, a number of separated ground areas, lots of wires from the board, etc. We recommend at least a 2 layer board with a nice solid ground plane on bottom and all the routing on top, short wires for off board components and clean power supply.
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Frank Thomson
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kevo1tinh



Joined: 27 May 2016
Posts: 3

PostPosted: Mon May 30, 2016 12:17 am    Post subject: Reply with quote

https://www.youtube.com/watch?v=tzvsIWsW6LE
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frank



Joined: 19 Oct 2005
Posts: 958

PostPosted: Mon May 30, 2016 8:27 am    Post subject: Reply with quote

Which program is that? Does it happen with a lower signal level? Does the clip LED come on?
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Frank Thomson
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dientulke



Joined: 16 Oct 2014
Posts: 8
Location: Vietnam

PostPosted: Mon May 30, 2016 9:15 pm    Post subject: Reply with quote

it's fake chip. try buy new ic from UK. perfect.
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