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	<title>Comments on: Building USB Isolator.</title>
	<atom:link href="http://www.circuitsathome.com/mcu/usb/building-usb-isolator/feed" rel="self" type="application/rss+xml" />
	<link>http://www.circuitsathome.com/mcu/usb/building-usb-isolator</link>
	<description>A Solder Joint</description>
	<lastBuildDate>Wed, 28 Jul 2010 22:29:35 -0600</lastBuildDate>
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		<title>By: oleg</title>
		<link>http://www.circuitsathome.com/mcu/usb/building-usb-isolator/comment-page-1#comment-6034</link>
		<dc:creator>oleg</dc:creator>
		<pubDate>Mon, 12 Jul 2010 14:49:18 +0000</pubDate>
		<guid isPermaLink="false">http://www.circuitsathome.com/?p=1244#comment-6034</guid>
		<description>Caps are size D ( EIA7343 ). ESR is more important than capacity - the lower you can get the better. Also, if you don&#039;t need that high of input voltage, you can use input cap with lower voltage rating which would give you more choices.</description>
		<content:encoded><![CDATA[<p>Caps are size D ( EIA7343 ). ESR is more important than capacity &#8211; the lower you can get the better. Also, if you don&#8217;t need that high of input voltage, you can use input cap with lower voltage rating which would give you more choices.</p>
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		<title>By: Fedor</title>
		<link>http://www.circuitsathome.com/mcu/usb/building-usb-isolator/comment-page-1#comment-6033</link>
		<dc:creator>Fedor</dc:creator>
		<pubDate>Mon, 12 Jul 2010 14:26:19 +0000</pubDate>
		<guid isPermaLink="false">http://www.circuitsathome.com/?p=1244#comment-6033</guid>
		<description>Hi Oleg, I see you are using 68uF and 22uF caps, where silkscreen text states 100uF and 10uF, so it is ok to use caps in the range of 10-22uF and 68-100 uF, right? And also, can you please say which size are they?

Thank you.</description>
		<content:encoded><![CDATA[<p>Hi Oleg, I see you are using 68uF and 22uF caps, where silkscreen text states 100uF and 10uF, so it is ok to use caps in the range of 10-22uF and 68-100 uF, right? And also, can you please say which size are they?</p>
<p>Thank you.</p>
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		<title>By: oleg</title>
		<link>http://www.circuitsathome.com/mcu/usb/building-usb-isolator/comment-page-1#comment-6006</link>
		<dc:creator>oleg</dc:creator>
		<pubDate>Mon, 07 Jun 2010 03:44:08 +0000</pubDate>
		<guid isPermaLink="false">http://www.circuitsathome.com/?p=1244#comment-6006</guid>
		<description>Hi Terry,

Thanks for your suggestions, I&#039;ll add some more contents to make building easier.

Vin is routed to the barrel connector in case you want to solder a wire here. Vbus is power to the B-side( peripheral ), it can be used to power the isolator from the device&#039;s 5V, if it&#039;s available. It is also possible to connect Vin to Vbus, shut down or simply don&#039;t populate the power supply and then power the isolator with 5V via barrel connector.

Let me know if you have more questions.

Oleg.</description>
		<content:encoded><![CDATA[<p>Hi Terry,</p>
<p>Thanks for your suggestions, I&#8217;ll add some more contents to make building easier.</p>
<p>Vin is routed to the barrel connector in case you want to solder a wire here. Vbus is power to the B-side( peripheral ), it can be used to power the isolator from the device&#8217;s 5V, if it&#8217;s available. It is also possible to connect Vin to Vbus, shut down or simply don&#8217;t populate the power supply and then power the isolator with 5V via barrel connector.</p>
<p>Let me know if you have more questions.</p>
<p>Oleg.</p>
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		<title>By: Terry</title>
		<link>http://www.circuitsathome.com/mcu/usb/building-usb-isolator/comment-page-1#comment-6004</link>
		<dc:creator>Terry</dc:creator>
		<pubDate>Sun, 06 Jun 2010 16:10:44 +0000</pubDate>
		<guid isPermaLink="false">http://www.circuitsathome.com/?p=1244#comment-6004</guid>
		<description>Hi Oleg:

From what I gather the Isolator (when no devices are attached) is not seen by the O/S (XP/7). There is no “Not Recognized “error, the Iso is not seen period…..which makes sense when you think about. I also read your FAQ using the jumper. Testing of unpacking files to a flash drive was successful. All devices so far are readily seen on both O/S’.

Perhaps I missed it,what is the purpose of the Vin and Vbus VIAs? Are they simply test points?

I appreciate that your target market may be more advanced than I. 
That said, a couple of thoughts for consideration.

Under the “More details” link for the kit, add some tips as to identifying the parts. For those items “quantity one” and roughly the same size, it was a little challenging. I wish I had remembered that the Mouser/Digikey BOMS were listed. The Eagle files are very helpful as are the part markings on the board and the site’s large pictures. Perhaps re-shooting the top view of the fully populated board for better lighting?

Thanks for the support.

Terry</description>
		<content:encoded><![CDATA[<p>Hi Oleg:</p>
<p>From what I gather the Isolator (when no devices are attached) is not seen by the O/S (XP/7). There is no “Not Recognized “error, the Iso is not seen period…..which makes sense when you think about. I also read your FAQ using the jumper. Testing of unpacking files to a flash drive was successful. All devices so far are readily seen on both O/S’.</p>
<p>Perhaps I missed it,what is the purpose of the Vin and Vbus VIAs? Are they simply test points?</p>
<p>I appreciate that your target market may be more advanced than I.<br />
That said, a couple of thoughts for consideration.</p>
<p>Under the “More details” link for the kit, add some tips as to identifying the parts. For those items “quantity one” and roughly the same size, it was a little challenging. I wish I had remembered that the Mouser/Digikey BOMS were listed. The Eagle files are very helpful as are the part markings on the board and the site’s large pictures. Perhaps re-shooting the top view of the fully populated board for better lighting?</p>
<p>Thanks for the support.</p>
<p>Terry</p>
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		<title>By: oleg</title>
		<link>http://www.circuitsathome.com/mcu/usb/building-usb-isolator/comment-page-1#comment-3063</link>
		<dc:creator>oleg</dc:creator>
		<pubDate>Wed, 30 Sep 2009 16:43:52 +0000</pubDate>
		<guid isPermaLink="false">http://www.circuitsathome.com/?p=1244#comment-3063</guid>
		<description>Thanks! I&#039;ll take a look at them.</description>
		<content:encoded><![CDATA[<p>Thanks! I&#8217;ll take a look at them.</p>
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		<title>By: Nick</title>
		<link>http://www.circuitsathome.com/mcu/usb/building-usb-isolator/comment-page-1#comment-3061</link>
		<dc:creator>Nick</dc:creator>
		<pubDate>Wed, 30 Sep 2009 15:42:30 +0000</pubDate>
		<guid isPermaLink="false">http://www.circuitsathome.com/?p=1244#comment-3061</guid>
		<description>Yeah I found out about this product from someone on DIYAUDIO.COM!</description>
		<content:encoded><![CDATA[<p>Yeah I found out about this product from someone on DIYAUDIO.COM!</p>
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		<title>By: Nick</title>
		<link>http://www.circuitsathome.com/mcu/usb/building-usb-isolator/comment-page-1#comment-3060</link>
		<dc:creator>Nick</dc:creator>
		<pubDate>Wed, 30 Sep 2009 15:34:22 +0000</pubDate>
		<guid isPermaLink="false">http://www.circuitsathome.com/?p=1244#comment-3060</guid>
		<description>For your DigiKey BOM the low ESR caps by Kemet are much cheaper than AVX comparables, here are the part numbers. 399-5300-1-ND for the 22uF 70mOhm ESR and 495-1582-1-ND which is 68uF 260mOhm ESR</description>
		<content:encoded><![CDATA[<p>For your DigiKey BOM the low ESR caps by Kemet are much cheaper than AVX comparables, here are the part numbers. 399-5300-1-ND for the 22uF 70mOhm ESR and 495-1582-1-ND which is 68uF 260mOhm ESR</p>
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	<item>
		<title>By: oleg</title>
		<link>http://www.circuitsathome.com/mcu/usb/building-usb-isolator/comment-page-1#comment-3043</link>
		<dc:creator>oleg</dc:creator>
		<pubDate>Tue, 29 Sep 2009 17:06:21 +0000</pubDate>
		<guid isPermaLink="false">http://www.circuitsathome.com/?p=1244#comment-3043</guid>
		<description>I sent you the BOM. Please keep me posted about your project progress - I am very curious about audio applications of this isolator!</description>
		<content:encoded><![CDATA[<p>I sent you the BOM. Please keep me posted about your project progress &#8211; I am very curious about audio applications of this isolator!</p>
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		<title>By: Nick</title>
		<link>http://www.circuitsathome.com/mcu/usb/building-usb-isolator/comment-page-1#comment-3041</link>
		<dc:creator>Nick</dc:creator>
		<pubDate>Tue, 29 Sep 2009 15:40:50 +0000</pubDate>
		<guid isPermaLink="false">http://www.circuitsathome.com/?p=1244#comment-3041</guid>
		<description>That would be great, I am a registered user there , maybe its just my issue... cant wait to get the boards I am using them for USB audio!</description>
		<content:encoded><![CDATA[<p>That would be great, I am a registered user there , maybe its just my issue&#8230; cant wait to get the boards I am using them for USB audio!</p>
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	<item>
		<title>By: oleg</title>
		<link>http://www.circuitsathome.com/mcu/usb/building-usb-isolator/comment-page-1#comment-3039</link>
		<dc:creator>oleg</dc:creator>
		<pubDate>Tue, 29 Sep 2009 14:45:23 +0000</pubDate>
		<guid isPermaLink="false">http://www.circuitsathome.com/?p=1244#comment-3039</guid>
		<description>It is public. However, I just checked and it turns out that you have to be a registered user at Digi-Key and be logged in to see it. I can download this BOM as .csv and e-mail it to you, if you&#039;d like.</description>
		<content:encoded><![CDATA[<p>It is public. However, I just checked and it turns out that you have to be a registered user at Digi-Key and be logged in to see it. I can download this BOM as .csv and e-mail it to you, if you&#8217;d like.</p>
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