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Old 22nd July 2011, 04:48 AM   #131
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speaker protection | eBay

70+ units , 7 -20$$. ta7317p , or discrete , all omron or similar relays. cheap.

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Old 22nd July 2011, 05:23 AM   #132
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Can I ask one more (not suggestion) rather request. Can you put B/W in PDF for home etching boards

thanks
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Old 22nd July 2011, 07:24 AM   #133
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Quote:
Originally Posted by Josip_Del View Post
Can I ask one more (not suggestion) rather request. Can you put B/W in PDF for home etching boards

thanks
Zip has .JPG PCB art , overview,schematic , and BOM.
JPG is non-mirror (toner transfer) and will (should) measure 254 X 76mm in a graphics program (PSP7 is what I use).
Picture of final "real world debug" below.

OS
Attached Images
File Type: jpg placement.jpg (57.0 KB, 1236 views)
Attached Files
File Type: zip DIYA-AX-PCB.zip (414.6 KB, 393 views)
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Last edited by ostripper; 22nd July 2011 at 07:32 AM.
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Old 22nd July 2011, 07:28 AM   #134
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Thanks osstriper for all your effort, and knowledge
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Old 22nd July 2011, 07:34 AM   #135
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You are welcome , layout was tweaked after photo to give some of the caps more room.
Be careful , this is still "under review".

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Old 22nd July 2011, 07:34 AM   #136
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I think this new layout is better. I had some concerns to be honest about the 0V rail between the two filtering caps and the possibility of EM induction noise into the circuitry running adjacent to that line. Nice one OS!
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Old 22nd July 2011, 07:37 AM   #137
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One question what these pins Tp1/Tp2 is for?
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Old 22nd July 2011, 10:38 AM   #138
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Quote:
Originally Posted by Josip_Del View Post
One question what these pins Tp1/Tp2 is for?
Bias set?
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Old 22nd July 2011, 10:39 AM   #139
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Quote:
Originally Posted by ostripper View Post
.
Be careful , this is still "under review".

OS
Nice job!

I notice a small error on the new layout: C1's furthest pad is not connected.
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Old 22nd July 2011, 10:48 AM   #140
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And one my small suggestion rather stupid can you just add another pin for trimmers which not in line like Vishay T93YB type.
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