<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head> <title></title> <link rel="stylesheet" media="screen" type="text/css" href="./style.css" /> <link rel="stylesheet" media="screen" type="text/css" href="./design.css" /> <link rel="stylesheet" media="print" type="text/css" href="./print.css" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> </head> <body> <h1 class="sectionedit614"><a name="pcb_footprint_guide" id="pcb_footprint_guide">PCB Footprint Guide</a></h1> <div class="level1"> <ul> <li class="level1"><div class="li"> Stuart Brorson's footprint <a href="http://www.brorson.com/gEDA/land_patterns_20070805.pdf" class="urlextern" title="http://www.brorson.com/gEDA/land_patterns_20070805.pdf" rel="nofollow">footprint guide</a></div> </li> <li class="level1"><div class="li"> <a href="http://pcb.geda-project.org/pcb-cvs/pcb.html" class="urlextern" title="http://pcb.geda-project.org/pcb-cvs/pcb.html" rel="nofollow">PCB manual</a></div> </li> <li class="level1"><div class="li"> The PCB <acronym title="Frequently Asked Questions">FAQ</acronym>: <a href="geda-pcb_tips.html" class="wikilink1" title="geda-pcb_tips.html">pcb_tips</a>.</div> </li> <li class="level1"><div class="li"> The PCB Quick-Reference has info on <a href="geda-pcb-quick_reference.html#footprint_reference" class="wikilink1" title="geda-pcb-quick_reference.html">footprints</a></div> </li> <li class="level1"><div class="li"> <a href="geda-pcb_footprint_naming_conventions.html" class="wikilink1" title="geda-pcb_footprint_naming_conventions.html">PCB Footprint Naming Conventions</a> : read this to learn how to <em>name</em> your footprint files.</div> </li> </ul> </div> <!-- EDIT614 SECTION "PCB Footprint Guide" [4-451] --> <h3 class="sectionedit615"><a name="footprint_basics" id="footprint_basics">Footprint basics</a></h3> <div class="level3"> <ul> <li class="level1"><div class="li"> There are two types of footprints: M4 and NEWLIB.</div> </li> <li class="level1"><div class="li"> The best tools for creating footprints are PCB (wysiwyg), TEXT EDITOR (fast, accurate), SCRIPTING (powerful).</div> </li> <li class="level1"><div class="li"> For drawing footprints in PCB, refer to:</div> </li> <li class="level1"><div class="li"> For writing footprints in text, refer to: ” <em>Footprint Creation for the Open-Source Layout Program “PCB”</em> written and maintained by Stuart Brorson</div> </li> <li class="level1"><div class="li"> For Scripting footprints:</div> </li> <li class="level1"><div class="li"> Other things you may find helpful: calculator, paper+pencil, datasheets, calipers, spreadsheet.</div> </li> </ul> </div> <!-- EDIT615 SECTION "Footprint basics" [452-981] --> <h3 class="sectionedit616"><a name="pcb_footprint_faq" id="pcb_footprint_faq">PCB Footprint FAQ</a></h3> <div class="level3"> </div> <h4><a name="what_is_the_footprint_naming_convention" id="what_is_the_footprint_naming_convention">What is the Footprint naming Convention ?</a></h4> <div class="level4"> </div> <h4><a name="can_i_have_two_pads_pins_with_the_same_pin-number" id="can_i_have_two_pads_pins_with_the_same_pin-number">Can I have two pads/pins with the same pin-number?</a></h4> <div class="level4"> <p> “Yes, totally. This is how you create oval shaped copper around pins, or funny shaped pads (e.g. square at one end and round at the other) by overlapping two or more pads.” </p> </div> <h4><a name="how_do_i_make_an_oval_shaped_pad_around_a_footprint_pin" id="how_do_i_make_an_oval_shaped_pad_around_a_footprint_pin">How do I make an oval shaped pad around a footprint pin?</a></h4> <div class="level4"> <p> Simply add a pad on top of your pin and give them the same pin-number. If the soldermask is kept off both pins, and they overlap, they should appear as one pin on your board. </p> </div> <h4><a name="how_do_i_make_a_2-sided_pad" id="how_do_i_make_a_2-sided_pad">How do I make a 2-sided pad?</a></h4> <div class="level4"> <p> “Odd as it sounds, this can be necessary for some edge connectors. … but how do you do it???” </p> </div> <h4><a name="edge_connectors" id="edge_connectors">Edge Connectors</a></h4> <div class="level4"> </div> <h4><a name="what_are_some_references_for_making_surface_mount_pads_and_footprints" id="what_are_some_references_for_making_surface_mount_pads_and_footprints">What are some references for making surface mount pads and footprints?</a></h4> <div class="level4"> <ul> <li class="level1"><div class="li"> <a href="http://www.nxp.com/package" class="urlextern" title="http://www.nxp.com/package" rel="nofollow">http://www.nxp.com/package</a></div> </li> <li class="level1"><div class="li"> <a href="http://focus.ti.com/general/docs/packaging.jsp" class="urlextern" title="http://focus.ti.com/general/docs/packaging.jsp" rel="nofollow">http://focus.ti.com/general/docs/packaging.jsp</a></div> </li> <li class="level1"><div class="li"> <a href="http://www.maxim-ic.com/design/packaging/" class="urlextern" title="http://www.maxim-ic.com/design/packaging/" rel="nofollow">http://www.maxim-ic.com/design/packaging/</a></div> </li> <li class="level1"><div class="li"> <a href="http://www.national.com/packaging/folders/pkg_index.html" class="urlextern" title="http://www.national.com/packaging/folders/pkg_index.html" rel="nofollow">http://www.national.com/packaging/folders/pkg_index.html</a></div> </li> <li class="level1"><div class="li"> <a href="http://www.irf.com/package/" class="urlextern" title="http://www.irf.com/package/" rel="nofollow">http://www.irf.com/package/</a></div> </li> <li class="level1"><div class="li"> <a href="http://www.onsemi.com/PowerSolutions/supportTechDoc.do?id=1165" class="urlextern" title="http://www.onsemi.com/PowerSolutions/supportTechDoc.do?id=1165" rel="nofollow">http://www.onsemi.com/PowerSolutions/supportTechDoc.do?id=1165</a></div> </li> <li class="level1"><div class="li"> <a href="http://www.analog.com/Analog_Root/Packages/Packages_Home/" class="urlextern" title="http://www.analog.com/Analog_Root/Packages/Packages_Home/" rel="nofollow">http://www.analog.com/Analog_Root/Packages/Packages_Home/</a></div> </li> <li class="level1"><div class="li"> <a href="http://www.linear.com/designtools/PkgInfo.jsp" class="urlextern" title="http://www.linear.com/designtools/PkgInfo.jsp" rel="nofollow">http://www.linear.com/designtools/PkgInfo.jsp</a></div> </li> </ul> <p> <a href="geda-pcb_tips.html" class="wikilink1" title="geda-pcb_tips.html">pcb_tips</a> covers a lot of Footprint material. This page and that page need to be reconciled! </p> </div> <!-- EDIT616 SECTION "PCB Footprint FAQ" [982-2279] --> <h2 class="sectionedit617"><a name="sharing_pcb_footprints" id="sharing_pcb_footprints">Sharing PCB Footprints</a></h2> <div class="level2"> </div> <h5><a name="popular_sources_of_footprints" id="popular_sources_of_footprints">Popular Sources of Footprints</a></h5> <div class="level5"> <ul> <li class="level1"><div class="li"> The place to share symbols and footprints is <a href="http://www.gedasymbols.org" class="urlextern" title="http://www.gedasymbols.org" rel="nofollow"> gedasymbols.org</a></div> </li> </ul> <ul> <li class="level1"><div class="li"> You can find many PCB footprints at <a href="http://www.luciani.org/geda/pcb/pcb-footprint-list.html" class="urlextern" title="http://www.luciani.org/geda/pcb/pcb-footprint-list.html" rel="nofollow">John Luciani's footprint page</a> </div> </li> </ul> <ul> <li class="level1"><div class="li"> You can share <a href="http://opencircuits.com/PCB_Footprints" class="urlextern" title="http://opencircuits.com/PCB_Footprints" rel="nofollow"> gEDA footprints at Open Circuits</a>.</div> </li> </ul> </div> <!-- EDIT617 SECTION "Sharing PCB Footprints" [2280-] --></body> </html>
distrib
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Mageia
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5
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x86_64
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media
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core-release
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by-pkgid
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f2f28f61487f3042d93877451f0a311f
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files
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