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19th February 2005, 07:45 PM
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#1 |
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diyAudio Member
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
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NE5532 to AD825 adapter
I set up this adapter board for replacing the NE5532 with a pair of AD825's and 0603 decoupling capacitors -- there is the option of connecting pin 4 to V-, or connecting it to ground for single-supply operation.
if there is interest I can have some made. They are a bit small to cut on a table saw, probably will have to design rows of holes so they can be snapped apart. http://www.tech-diy.com/ad825_adapter.htm 
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20th February 2005, 05:08 AM
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#2 |
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diyAudio Member
Join Date: Aug 2003
Location: Prague,Czech Republic
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Like this ?
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20th February 2005, 12:32 PM
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#3 |
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diyAudio Member
Join Date: Apr 2002
Location: Llanddewi Brefi, NJ
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I thought of top and bottom mounting, but if the AD825 runs to its maximum capacity you will probably shorten its life dramatically. there is no airflow to the bottom chip so it will really cook.
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20th February 2005, 01:50 PM
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#4 |
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diyAudio Member
Join Date: Aug 2003
Location: Prague,Czech Republic
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What is maximum capacity ? Output current +/- 50 mA ? In 99 % cases op amp run by much lower conditions. BTW this design is universal, not only for 825 and I don't observe any disturbing by using of this aid
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20th February 2005, 02:05 PM
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#6 |
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diyAudio Member
Join Date: Oct 2004
Location: At the sea front, just under Rotterdam
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Gerber files of the double sided version would be nice.
__________________
Looks like Sponge Bob has killed another thread. |
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20th February 2005, 03:38 PM
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#8 |
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diyAudio Member
Join Date: Nov 2002
Location: Grenoble, FR
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The bottom uses thicker traces because I had the place to make them thicker. Making them as thin as the top planes can be done without problems.
__________________
Just remember: in theory there's no difference between theory and practice. But in practice it usually is quite a bit difference... Bob Pease |
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20th February 2005, 04:07 PM
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#9 |
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diyAudio Member
Join Date: Aug 2003
Location: Prague,Czech Republic
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To Bricolo : Aren't traces on top side uncorrect ?
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20th February 2005, 04:17 PM
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#10 |
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diyAudio Member
Join Date: Nov 2002
Location: Grenoble, FR
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What's wrong?
The 2 sides are printed in mirored mode, maybe that's wrong.
__________________
Just remember: in theory there's no difference between theory and practice. But in practice it usually is quite a bit difference... Bob Pease |
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