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Finally, in response to the first entry in this section, I too read that application note in Analog Devices Audio/Video Reference Manual. My copy is dated 1992. I've repaired a lot of amplifiers, but haven't built any. If anyone else is hip to this amp I'd like to hear about it. It is a very unique design. I also like the A75 amp design from Nelson Pass and Norman Thagard, and the Leach Amp by Marshall Leach. The last two are pretty normal as far as design goes, not as adventurous as the Alexander with its current-feedback approach. | Finally, in response to the first entry in this section, I too read that application note in Analog Devices Audio/Video Reference Manual. My copy is dated 1992. I've repaired a lot of amplifiers, but haven't built any. If anyone else is hip to this amp I'd like to hear about it. It is a very unique design. I also like the A75 amp design from Nelson Pass and Norman Thagard, and the Leach Amp by Marshall Leach. The last two are pretty normal as far as design goes, not as adventurous as the Alexander with its current-feedback approach. | ||
Aloha, RAF--[[User:66.8.194.185|66.8.194.185]] 14:04, 18 May 2007 (PDT) | Aloha, RAF--[[User:66.8.194.185|66.8.194.185]] 14:04, 18 May 2007 (PDT) | ||
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== automotive electronics == | == automotive electronics == | ||
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== inviting bloggers to open circuits == | == inviting bloggers to open circuits == | ||
− | == how to connect a JTAG probe to a Nokia phone == | + | === how to connect a JTAG probe to a Nokia phone === |
I'd like to invite bloggers such as GyrosGeier to edit OpenCircuits. | I'd like to invite bloggers such as GyrosGeier to edit OpenCircuits. | ||
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--[[User:DavidCary|DavidCary]] 08:58, 18 December 2006 (PST) | --[[User:DavidCary|DavidCary]] 08:58, 18 December 2006 (PST) | ||
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The colors are better in the other skins, but the navigation is worse. | The colors are better in the other skins, but the navigation is worse. | ||
How about a new skin that is like the default when it comes to navigation, but uses the normal wiki colors? // [[User:Cj|Cj]] 06:45, 4 October 2008 (PDT) | How about a new skin that is like the default when it comes to navigation, but uses the normal wiki colors? // [[User:Cj|Cj]] 06:45, 4 October 2008 (PDT) | ||
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*** Guys, the red color on links is AwuFul, it brings ppl headaches. | *** Guys, the red color on links is AwuFul, it brings ppl headaches. | ||
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--[[User:Takeda|Takeda]] 16:38, 29 September 2007 (PDT) | --[[User:Takeda|Takeda]] 16:38, 29 September 2007 (PDT) | ||
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== inviting people from other forums to open circuits == | == inviting people from other forums to open circuits == | ||
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Or would http://en.wikibooks.org/wiki/Serial_Programming or the [http://interwiki.sourceforge.net/cgi-bin/picawiki.pl/StartingPoint PICA wiki] be better for discussing improvements? | Or would http://en.wikibooks.org/wiki/Serial_Programming or the [http://interwiki.sourceforge.net/cgi-bin/picawiki.pl/StartingPoint PICA wiki] be better for discussing improvements? | ||
--[[User:DavidCary|DavidCary]] 13:21, 21 June 2007 (PDT) | --[[User:DavidCary|DavidCary]] 13:21, 21 June 2007 (PDT) | ||
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== IC design == | == IC design == | ||
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--[[User:DavidCary|DavidCary]] 17:12, 9 April 2010 (UTC) | --[[User:DavidCary|DavidCary]] 17:12, 9 April 2010 (UTC) | ||
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[http://nmg.thecomicseries.com/comics/133 indieVisible] -- | [http://nmg.thecomicseries.com/comics/133 indieVisible] -- | ||
Originally they started as a nonpolitical open hardware movement for DIY people using advanced minifacturing (3D printing and so on). | Originally they started as a nonpolitical open hardware movement for DIY people using advanced minifacturing (3D printing and so on). | ||
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− | + | [[Category:Community| ]] | |
− | + | Greetz. I linked here from Sparkfun and I guess I will toss this over the wire: | |
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− | + | I have here a design for a small power supply board that is intended to be sandwiched on top of a lithium ion cell ( I spec'd a pretty small cell that has a storage capacity of 910mAH). It is thermally controlled and automatically switches off the cell when the charger (USB or wall wart) is connected. I include also a soft-latching power switch, which can be externally connected, and a boost-buck switching converter for driving 3.3V loads. | |
− | + | Here is an image of the schematic: | |
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− | + | [[File:c:\temp\P01-109.jpg]] | |
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− | + | I do have one question: Barring the fact that I have tried very very hard to get the regulator section layout as tight as possible (The switch has a rate of 1.2MHz), nobody I have seen on the web has indicated any good way to eliminate the AC switching noise from the output. Even bumping the output voltage a bit and feeding an LDO linear regulator seems to bleed the noise right downstream. | |
− | + | Top View: | |
− | + | [[File:c:\temp\P01-109-brd1.jpg]] | |
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− | + | Bottom View: | |
− | + | [[File:c:\temp\P01-109-brd2.jpg]] | |
− | + | These last two prior to the flood-fill on both sides for ground planes. | |
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− | + | J.R. Stoner | |
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