Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression

/
/
g

Test String

Code Generator

Generated Code

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"(?<code1><a href=""\/questions\/\d+.+?"">)(?<code2>.+)(?<code3><\/a)"; string input = @"<!DOCTYPE html> <html> <head> <title>Newest Questions - Page 2 - Electrical Engineering Stack Exchange</title> <link rel=""shortcut icon"" href=""//cdn.sstatic.net/electronics/img/favicon.ico""> <link rel=""apple-touch-icon image_src"" href=""//cdn.sstatic.net/electronics/img/apple-touch-icon.png""> <link rel=""search"" type=""application/opensearchdescription+xml"" title=""Electrical Engineering Stack Exchange"" href=""/opensearch.xml""> <script type=""text/javascript"" src=""//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js""></script> <script type=""text/javascript"" src=""//cdn.sstatic.net/js/stub.js?v=5d233283ca8d""></script> <link rel=""stylesheet"" type=""text/css"" href=""//cdn.sstatic.net/electronics/all.css?v=672ddec9ce04""> <script type=""text/x-mathjax-config""> MathJax.Hub.Config({""HTML-CSS"": { preferredFont: ""TeX"", availableFonts: [""STIX"",""TeX""], linebreaks: { automatic:true }, EqnChunk: (MathJax.Hub.Browser.isMobile ? 10 : 50) }, tex2jax: { inlineMath: [ [""\\$"", ""\\$""] ], displayMath: [ [""$$"",""$$""], [""\\["", ""\\]""] ], processEscapes: true, ignoreClass: ""tex2jax_ignore|dno"" }, TeX: { noUndefined: { attributes: { mathcolor: ""red"", mathbackground: ""#FFEEEE"", mathsize: ""90%"" } }, Macros: { href: ""{}"" } }, messageStyle: ""none"" }); </script> <script type=""text/javascript"" src=""http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS_HTML""></script> <script type=""text/javascript""> StackExchange.ready(function () { StackExchange.realtime.init('sockets.ny.stackexchange.com'); StackExchange.realtime.subscribeToInboxNotifications(); StackExchange.realtime.subscribeToReputationNotifications('135'); }); </script> <script type=""text/javascript""> StackExchange.init({""stackAuthUrl"":""https://stackauth.com"",""serverTime"":1377686462,""styleCode"":true,""enableUserHovercards"":true,""site"":{""name"":""Electrical Engineering Stack Exchange"",""description"":""Q&A for electronics and electrical engineering professionals, students, and enthusiasts"",""isNoticesTabEnabled"":true,""recaptchaPublicKey"":""6LdsB7sSAAAAAAzjgEF_Hd8vXv-C42sa_KyofaGR"",""enableSocialMediaInSharePopup"":true},""user"":{""fkey"":""964caaf8350dc8ae69af722ba29b4a1d"",""isAnonymous"":true}}); StackExchange.using.setCacheBreakers({""js/prettify-full.js"":""6c261bebf56a"",""js/moderator.js"":""ed7a8238b2f8"",""js/full-anon.js"":""5f9bf5810297"",""js/full.js"":""027ac5ea264e"",""js/wmd.js"":""cff10cca4fd9"",""js/third-party/jquery.autocomplete.min.js"":""e5f01e97f7c3"",""js/mobile.js"":""82a79dbb7259"",""js/help.js"":""6e6623243cf6"",""js/tageditor.js"":""450c9e8426fc"",""js/tageditornew.js"":""b6c68ad4c7dd"",""js/inline-tag-editing.js"":""8e84e8a137f7"",""js/revisions.js"":""d3e781ee5528"",""js/review.js"":""947758ba83ea"",""js/tagsuggestions.js"":""aa48ef6154df"",""js/post-validation.js"":""bb996020492a"",""js/explore-qlist.js"":""1c5bbd79b562"",""js/events.js"":""27a33f0b2cad""}); StackExchange.using.setCacheBreakers({""js/mathjax-editing.js"":""6da1b6cfe19f"",""js/external-editor.js"":""51c0a8d46d29""}); </script> <script type=""text/javascript""> StackExchange.using(""gps"", function() { StackExchange.gps.init(true); }); </script> <script type=""text/javascript""> StackExchange.ready(function () { $('#nav-tour').click(function () { StackExchange.using(""gps"", function() { StackExchange.gps.track(""aboutpage.click"", { aboutclick_location: ""headermain"" }, true); }); }); }); </script> </head> <body class=""questions-page""> <noscript><div id=""noscript-padding""></div></noscript> <div id=""notify-container""></div> <div id=""overlay-header""></div> <div id=""custom-header""></div> <div class=""container""> <div id=""header"" class=headeranon> <div id=""portalLink""> <a class=""genu"" href=""http://stackexchange.com"" onclick=""StackExchange.ready(function(){genuwine.click();});return false;"">Stack Exchange</a> </div> <div id=""topbar""> <div id=""hlinks""> <span id=""hlinks-user""></span> <span id=""hlinks-nav""> <a href=""/users/login?returnurl=%2fquestions%3fpage%3d2%26sort%3dnewest"">sign up</a> <span class=""lsep"">|</span> <a href=""/users/login?returnurl=%2fquestions%3fpage%3d2%26sort%3dnewest"">log in</a> <span class=""lsep"">|</span> </span> <span id=""hlinks-custom""></span> </div> <div id=""hsearch""> <form id=""search"" action=""/search"" method=""get"" autocomplete=""off""> <div> <input autocomplete=""off"" name=""q"" class=""textbox"" placeholder=""search"" tabindex=""1"" type=""text"" maxlength=""240"" size=""28"" value=""> </div> </form> </div> </div> <br class=""cbt""> <div id=""hlogo""> <a href=""/""> Electrical Engineering </a> </div> <div id=""hmenus""> <div class=""nav mainnavs mainnavsanon""> <ul> <li class=""youarehere""><a id=""nav-questions"" href=""/questions"">Questions</a></li> <li><a id=""nav-tags"" href=""/tags"">Tags</a></li> <li><a id=""nav-tour"" href=""/about"">Tour</a></li> <li><a id=""nav-users"" href=""/users"">Users</a></li> </ul> </div> <div class=""nav askquestion""> <ul> <li> <a id=""nav-askquestion"" href=""/questions/ask"">Ask Question</a> </li> </ul> </div> </div> </div> <div id=""content""> <div id=""mainbar""> <div class=""subheader""> <h1 id=""h-all-questions"">All Questions</h1> <div id=""tabs""> <a class=""youarehere"" href=""/questions?sort=newest"" title=""the most recently asked questions"">newest</a> <a href=""/questions?sort=featured"" title=""questions with open bounties""><span class='bounty-indicator-tab'>3</span>featured</a> <a href=""/questions?sort=frequent"" title=""questions with the most links"">frequent</a> <a href=""/questions?sort=votes"" title=""questions with the most votes"">votes</a> <a href=""/questions?sort=active"" title=""questions that have recent activity"">active</a> <a href=""/questions?sort=unanswered"" title=""questions that have no upvoted answers"">unanswered</a> </div> </div> <div id=""questions""> <div class=""question-summary"" id=""question-summary-80417""> <div class=""statscontainer""> <div class=""statsarrow""></div> <div class=""stats""> <div class=""vote""> <div class=""votes""> <span class=""vote-count-post ""><strong>1</strong></span> <div class=""viewcount"">vote</div> </div> </div> <div class=""status answered""> <strong>2</strong>answers </div> </div> <div class=""views "" title=""65 views""> 65 views </div> </div> <div class=""summary""> <h3><a href=""/questions/80417/can-i-safely-enclose-battery-powered-electronics-in-an-antistatic-bag-to-protect"" class=""question-hyperlink"">Can I safely enclose battery-powered electronics in an antistatic bag to protect it from static electricity?</a></h3> <div class=""excerpt""> I am building an enclosure for a Beaglebone and external circuit that I want to be able to wear, and therefore want to be lightweight and somewhat comfortable. I power the Beaglebone using a battery ... </div> <div class=""tags t-shielding t-antistatic t-static""> <a href=""/questions/tagged/shielding"" class=""post-tag"" title=""show questions tagged 'shielding'"" rel=""tag"">shielding</a> <a href=""/questions/tagged/antistatic"" class=""post-tag"" title=""show questions tagged 'antistatic'"" rel=""tag"">antistatic</a> <a href=""/questions/tagged/static"" class=""post-tag"" title=""show questions tagged 'static'"" rel=""tag"">static</a> </div> <div class=""started fr""> <div class=""user-info ""> <div class=""user-action-time""> asked <span title=""2013-08-27 22:47:03Z"" class=""relativetime"">11 hours ago</span> </div> <div class=""user-gravatar32""> <a href=""/users/19783/mokogobo""><div class=""><img src=""https://www.gravatar.com/avatar/045025756373a85e8336c8126ee006c6?s=32&d=identicon&r=PG"" alt="" width=""32"" height=""32""></div></a> </div> <div class=""user-details""> <a href=""/users/19783/mokogobo"">mokogobo</a><br> <span class=""reputation-score"" title=""reputation score"" dir=""ltr"">31</span><span title=""4 bronze badges""><span class=""badge3""></span><span class=""badgecount"">4</span></span> </div> </div> </div> </div> </div> <div class=""question-summary"" id=""question-summary-80412""> <div class=""statscontainer""> <div class=""statsarrow""></div> <div class=""stats""> <div class=""vote""> <div class=""votes""> <span class=""vote-count-post ""><strong>0</strong></span> <div class=""viewcount"">votes</div> </div> </div> <div class=""status answered""> <strong>1</strong>answer </div> </div> <div class=""views "" title=""22 views""> 22 views </div> </div> <div class=""summary""> <h3><a href=""/questions/80412/how-to-overwrite-flash-memory-on-stm32l-series"" class=""question-hyperlink"">How to overwrite flash memory on STM32L series</a></h3> <div class=""excerpt""> I am trying to write a known pattern (ie 0xFFFFFFFF or 0x00000000) on top of already written flash memory, to invalidate portions of it for a primitive file system. But it doesn't work for me on the ... </div> <div class=""tags t-stm32 t-flash""> <a href=""/questions/tagged/stm32"" class=""post-tag"" title=""show questions tagged 'stm32'"" rel=""tag"">stm32</a> <a href=""/questions/tagged/flash"" class=""post-tag"" title=""show questions tagged 'flash'"" rel=""tag"">flash</a> </div> <div class=""started fr""> <div class=""user-info ""> <div class=""user-action-time""> asked <span title=""2013-08-27 22:09:01Z"" class=""relativetime"">12 hours ago</span> </div> <div class=""user-gravatar32""> <a href=""/users/15757/mark-lakata""><div class=""><img src=""https://www.gravatar.com/avatar/5fd80d98f96f9adbde7876cbda181715?s=32&d=identicon&r=PG"" alt="" width=""32"" height=""32""></div></a> </div> <div class=""user-details""> <a href=""/users/15757/mark-lakata"">Mark Lakata</a><br> <span class=""reputation-score"" title=""reputation score"" dir=""ltr"">111</span><span title=""2 bronze badges""><span class=""badge3""></span><span class=""badgecount"">2</span></span> </div> </div> </div> </div> </div> <div class=""question-summary"" id=""question-summary-80407""> <div class=""statscontainer""> <div class=""statsarrow""></div> <div class=""stats""> <div class=""vote""> <div class=""votes""> <span class=""vote-count-post ""><strong>2</strong></span> <div class=""viewcount"">votes</div> </div> </div> <div class=""status answered""> <strong>1</strong>answer </div> </div> <div class=""views "" title=""61 views""> 61 views </div> </div> <div class=""summary""> <h3><a href=""/questions/80407/about-power-supply-of-opertional-amplifier"" class=""question-hyperlink"">about power supply of opertional amplifier</a></h3> <div class=""excerpt""> I am constructing an operational amplifier as shown in the following figure. I use a batter as supplier for the OP Amp and set it up as a non-inverting amp circuit. I saw that the output was clipped ... </div> <div class=""tags t-op-amp""> <a href=""/questions/tagged/op-amp"" class=""post-tag"" title=""show questions tagged 'op-amp'"" rel=""tag"">op-amp</a> </div> <div class=""started fr""> <div class=""user-info ""> <div class=""user-action-time""> asked <span title=""2013-08-27 21:49:14Z"" class=""relativetime"">12 hours ago</span> </div> <div class=""user-gravatar32""> <a href=""/users/17060/user1285419""><div class=""><img src=""https://www.gravatar.com/avatar/08ee68b20a4eceff26f7eee99b708c08?s=32&d=identicon&r=PG"" alt="" width=""32"" height=""32""></div></a> </div> <div class=""user-details""> <a href=""/users/17060/user1285419"">user1285419</a><br> <span class=""reputation-score"" title=""reputation score"" dir=""ltr"">165</span><span title=""5 bronze badges""><span class=""badge3""></span><span class=""badgecount"">5</span></span> </div> </div> </div> </div> </div> <div class=""question-summary"" id=""question-summary-80405""> <div class=""statscontainer""> <div class=""statsarrow""></div> <div class=""stats""> <div class=""vote""> <div class=""votes""> <span class=""vote-count-post ""><strong>4</strong></span> <div class=""viewcount"">votes</div> </div> </div> <div class=""status answered-accepted""> <strong>2</strong>answers </div> </div> <div class=""views "" title=""64 views""> 64 views </div> </div> <div class=""summary""> <h3><a href=""/questions/80405/5v-regulator-power-dissipation"" class=""question-hyperlink"">5V Regulator Power Dissipation</a></h3> <div class=""excerpt""> I am using a 5V regulator (LP2950) from ON Semiconductor. I am using this for USB power and I'm feeding in 9V from an adapter. USB requires maximum of 500mA right? So the maximum power dissipation in ... </div> <div class=""tags t-voltage-regulator t-surface-mount t-heatsink t-5v t-power-dissipation""> <a href=""/questions/tagged/voltage-regulator"" class=""post-tag"" title=""show questions tagged 'voltage-regulator'"" rel=""tag"">voltage-regulator</a> <a href=""/questions/tagged/surface-mount"" class=""post-tag"" title=""show questions tagged 'surface-mount'"" rel=""tag"">surface-mount</a> <a href=""/questions/tagged/heatsink"" class=""post-tag"" title=""show questions tagged 'heatsink'"" rel=""tag"">heatsink</a> <a href=""/questions/tagged/5v"" class=""post-tag"" title=""show questions tagged '5v'"" rel=""tag"">5v</a> <a href=""/questions/tagged/power-dissipation"" class=""post-tag"" title=""show questions tagged 'power-dissipation'"" rel=""tag"">power-dissipation</a> </div> <div class=""started fr""> <div class=""user-info ""> <div class=""user-action-time""> asked <span title=""2013-08-27 21:39:31Z"" class=""relativetime"">13 hours ago</span> </div> <div class=""user-gravatar32""> <a href=""/users/10082/david-norman""><div class=""><img src=""https://www.gravatar.com/avatar/8b073417e471077280b3fc5ff2eaf1f7?s=32&d=identicon&r=PG"" alt="" width=""32"" height=""32""></div></a> </div> <div class=""user-details""> <a href=""/users/10082/david-norman"">David Norman</a><br> <span class=""reputation-score"" title=""reputation score"" dir=""ltr"">322</span><span title=""3 silver badges""><span class=""badge2""></span><span class=""badgecount"">3</span></span><span title=""10 bronze badges""><span class=""badge3""></span><span class=""badgecount"">10</span></span> </div> </div> </div> </div> </div> <div class=""question-summary"" id=""question-summary-80404""> <div class=""statscontainer""> <div class=""statsarrow""></div> <div class=""stats""> <div class=""vote""> <div class=""votes""> <span class=""vote-count-post ""><strong>0</strong></span> <div class=""viewcount"">votes</div> </div> </div> <div class=""status answered""> <strong>1</strong>answer </div> </div> <div class=""views "" title=""44 views""> 44 views </div> </div> <div class=""summary""> <h3><a href=""/questions/80404/how-to-stop-two-dc-motors-simultaneously-using-limit-switches"" class=""question-hyperlink"">How to stop two DC motors simultaneously using limit switches</a></h3> <div class=""excerpt""> I need some help - I'm building a machine but I'm not sure of the best way of doing it. I have three large wire spools. Two empty and one full. The full spool (approx. 500kg) is much larger than the ... </div> <div class=""tags t-dc-motor t-switch-mode-power-supply t-servo t-plc t-toggle-switch""> <a href=""/questions/tagged/dc-motor"" class=""post-tag"" title=""show questions tagged 'dc-motor'"" rel=""tag"">dc-motor</a> <a href=""/questions/tagged/switch-mode-power-supply"" class=""post-tag"" title=""show questions tagged 'switch-mode-power-supply'"" rel=""tag"">switch-mode-power-supply</a> <a href=""/questions/tagged/servo"" class=""post-tag"" title=""show questions tagged 'servo'"" rel=""tag"">servo</a> <a href=""/questions/tagged/plc"" class=""post-tag"" title=""show questions tagged 'plc'"" rel=""tag"">plc</a> <a href=""/questions/tagged/toggle-switch"" class=""post-tag"" title=""show questions tagged 'toggle-switch'"" rel=""tag"">toggle-switch</a> </div> <div class=""started fr""> <div class=""user-info ""> <div class=""user-action-time""> asked <span title=""2013-08-27 21:29:47Z"" class=""relativetime"">13 hours ago</span> </div> <div class=""user-gravatar32""> <a href=""/users/28090/golden-bucky""><div class=""><img src=""https://www.gravatar.com/avatar/0d00cc71566104e18dc131bc7f5b4cf1?s=32&d=identicon&r=PG&f=1"" alt="" width=""32"" height=""32""></div></a> </div> <div class=""user-details""> <a href=""/users/28090/golden-bucky"">Golden Bucky</a><br> <span class=""reputation-score"" title=""reputation score"" dir=""ltr"">1</span> </div> </div> </div> </div> </div> <div class=""question-summary"" id=""question-summary-80396""> <div class=""statscontainer""> <div class=""statsarrow""></div> <div class=""stats""> <div class=""vote""> <div class=""votes""> <span class=""vote-count-post ""><strong>1</strong></span> <div class=""viewcount"">vote</div> </div> </div> <div class=""status answered""> <strong>1</strong>answer </div> </div> <div class=""views "" title=""58 views""> 58 views </div> </div> <div class=""summary""> <h3><a href=""/questions/80396/logic-level-translator-caveats"" class=""question-hyperlink"">Logic Level Translator caveats</a></h3> <div class=""excerpt""> I have a device that runs on 2.5Vcmos logic levels, there are about a half dozen ic's with a mixture of parallel and serial (TWI and I2C) signal lines. Rather than placing my own uC on the board I'd ... </div> <div class=""tags t-level-translation""> <a href=""/questions/tagged/level-translation"" class=""post-tag"" title=""show questions tagged 'level-translation'"" rel=""tag"">level-translation</a> </div> <div class=""started fr""> <div class=""user-info ""> <div class=""user-action-time""> asked <span title=""2013-08-27 20:45:03Z"" class=""relativetime"">13 hours ago</span> </div> <div class=""user-gravatar32""> <a href=""/users/1729/crasic""><div class=""><img src=""https://www.gravatar.com/avatar/61084e40f265986dd41136b4f3dc028f?s=32&d=identicon&r=PG"" alt="" width=""32"" height=""32""></div></a> </div> <div class=""user-details""> <a href=""/users/1729/crasic"">crasic</a><br> <span class=""reputation-score"" title=""reputation score"" dir=""ltr"">643</span><span title=""2 silver badges""><span class=""badge2""></span><span class=""badgecount"">2</span></span><span title=""8 bronze badges""><span class=""badge3""></span><span class=""badgecount"">8</span></span> </div> </div> </div> </div> </div> <div class=""question-summary"" id=""question-summary-80393""> <div class=""statscontainer""> <div class=""statsarrow""></div> <div class=""stats""> <div class=""vote""> <div class=""votes""> <span class=""vote-count-post ""><strong>1</strong></span> <div class=""viewcount"">vote</div> </div> </div> <div class=""status answered""> <strong>1</strong>answer </div> </div> <div class=""views "" title=""57 views""> 57 views </div> </div> <div class=""summary""> <h3><a href=""/questions/80393/microcontroller-newbe-here-led-color-pattern-controller-for-arcade-machine"" class=""question-hyperlink"">Microcontroller Newbe here. LED color pattern controller for arcade machine [on hold]</a></h3> <div class=""excerpt""> I am building an arcade machine and I want to make a cool led light display for the marquee. You can see pictures of what I'm talking about here. I want to light up each one of those holes with ... </div> <div class=""tags t-microcontroller t-led""> <a href=""/questions/tagged/microcontroller"" class=""post-tag"" title=""show questions tagged 'microcontroller'"" rel=""tag"">microcontroller</a> <a href=""/questions/tagged/led"" class=""post-tag"" title=""show questions tagged 'led'"" rel=""tag"">led</a> </div> <div class=""started fr""> <div class=""user-info ""> <div class=""user-action-time""> asked <span title=""2013-08-27 20:34:56Z"" class=""relativetime"">14 hours ago</span> </div> <div class=""user-gravatar32""> <a href=""/users/28086/doug-steinberg""><div class=""><img src=""https://www.gravatar.com/avatar/f8a5cf563e719e934263883978ab80f1?s=32&d=identicon&r=PG"" alt="" width=""32"" height=""32""></div></a> </div> <div class=""user-details""> <a href=""/users/28086/doug-steinberg"">Doug Steinberg</a><br> <span class=""reputation-score"" title=""reputation score"" dir=""ltr"">6</span><span title=""1 bronze badge""><span class=""badge3""></span><span class=""badgecount"">1</span></span> </div> </div> </div> </div> </div> <div class=""question-summary"" id=""question-summary-80385""> <div class=""statscontainer""> <div class=""statsarrow""></div> <div class=""stats""> <div class=""vote""> <div class=""votes""> <span class=""vote-count-post ""><strong>1</strong></span> <div class=""viewcount"">vote</div> </div> </div> <div class=""status answered""> <strong>2</strong>answers </div> </div> <div class=""views "" title=""69 views""> 69 views </div> </div> <div class=""summary""> <h3><a href=""/questions/80385/how-to-scale-dynamic-range-voltage-to-1-5-volt"" class=""question-hyperlink"">how to scale dynamic range voltage to 1-5 volt</a></h3> <div class=""excerpt""> how can i make circuit that scale input voltage that have dynamic range to 1-5 volt output? the circuit will have Vref+ and Vref- as maximum and minimum for Vinput and then scale to 1-5 volt output ... </div> <div class=""tags t-voltage t-amplifier""> <a href=""/questions/tagged/voltage"" class=""post-tag"" title=""show questions tagged 'voltage'"" rel=""tag"">voltage</a> <a href=""/questions/tagged/amplifier"" class=""post-tag"" title=""show questions tagged 'amplifier'"" rel=""tag"">amplifier</a> </div> <div class=""started fr""> <div class=""user-info ""> <div class=""user-action-time""> asked <span title=""2013-08-27 19:30:33Z"" class=""relativetime"">15 hours ago</span> </div> <div class=""user-gravatar32""> <a href=""/users/28084/user28084""><div class=""><img src=""https://www.gravatar.com/avatar/2cacd24f99b2bcbd8236d1ce8c3c559f?s=32&d=identicon&r=PG&f=1"" alt="" width=""32"" height=""32""></div></a> </div> <div class=""user-details""> <a href=""/users/28084/user28084"">user28084</a><br> <span class=""reputation-score"" title=""reputation score"" dir=""ltr"">9</span><span title=""2 bronze badges""><span class=""badge3""></span><span class=""badgecount"">2</span></span> </div> </div> </div> </div> </div> <div class=""question-summary"" id=""question-summary-80383""> <div class=""statscontainer""> <div class=""statsarrow""></div> <div class=""stats""> <div class=""vote""> <div class=""votes""> <span class=""vote-count-post ""><strong>0</strong></span> <div class=""viewcount"">votes</div> </div> </div> <div class=""status answered-accepted""> <strong>1</strong>answer </div> </div> <div class=""views "" title=""38 views""> 38 views </div> </div> <div class=""summary""> <h3><a href=""/questions/80383/is-it-the-frequency-that-determines-the-current-in-a-lc-tank-parallel-circuit"" class=""question-hyperlink"">Is it the frequency that determines the current in a LC Tank Parallel Circuit?</a></h3> <div class=""excerpt""> Jump a head to the question if you aren't interested in the background of my project Background of my project I want to create objects of metal. So I need to be able to cast a metal. Aluminium seems ... </div> <div class=""tags t-current t-frequency t-solenoid t-induction t-rlc""> <a href=""/questions/tagged/current"" class=""post-tag"" title=""show questions tagged 'current'"" rel=""tag"">current</a> <a href=""/questions/tagged/frequency"" class=""post-tag"" title=""show questions tagged 'frequency'"" rel=""tag"">frequency</a> <a href=""/questions/tagged/solenoid"" class=""post-tag"" title=""show questions tagged 'solenoid'"" rel=""tag"">solenoid</a> <a href=""/questions/tagged/induction"" class=""post-tag"" title=""show questions tagged 'induction'"" rel=""tag"">induction</a> <a href=""/questions/tagged/rlc"" class=""post-tag"" title=""show questions tagged 'rlc'"" rel=""tag"">rlc</a> </div> <div class=""started fr""> <div class=""user-info ""> <div class=""user-action-time""> asked <span title=""2013-08-27 19:29:24Z"" class=""relativetime"">15 hours ago</span> </div> <div class=""user-gravatar32""> <a href=""/users/26135/mike-de-klerk""><div class=""><img src=""https://www.gravatar.com/avatar/7c2d61f7fedb644912d1cef5ed0b250a?s=32&d=identicon&r=PG"" alt="" width=""32"" height=""32""></div></a> </div> <div class=""user-details""> <a href=""/users/26135/mike-de-klerk"">Mike de Klerk</a><br> <span class=""reputation-score"" title=""reputation score"" dir=""ltr"">183</span><span title=""6 bronze badges""><span class=""badge3""></span><span class=""badgecount"">6</span></span> </div> </div> </div> </div> </div> <div class=""question-summary"" id=""question-summary-80378""> <div class=""statscontainer""> <div class=""statsarrow""></div> <div class=""stats""> <div class=""vote""> <div class=""votes""> <span class=""vote-count-post ""><strong>4</strong></span> <div class=""viewcount"">votes</div> </div> </div> <div class=""status answered-accepted""> <strong>4</strong>answers </div> </div> <div class=""views "" title=""54 views""> 54 views </div> </div> <div class=""summary""> <h3><a href=""/questions/80378/replacing-resistors-with-equivalent-resistor"" class=""question-hyperlink"">Replacing resistors with equivalent resistor</a></h3> <div class=""excerpt""> This is somewhat a homework assignment, but please bear with me. Given the following schematic, I want to know the overall resistance when measured from node A to node B. simulate this circuit ... </div> <div class=""tags t-resistors t-resistance t-circuit-analysis""> <a href=""/questions/tagged/resistors"" class=""post-tag"" title=""show questions tagged 'resistors'"" rel=""tag"">resistors</a> <a href=""/questions/tagged/resistance"" class=""post-tag"" title=""show questions tagged 'resistance'"" rel=""tag"">resistance</a> <a href=""/questions/tagged/circuit-analysis"" class=""post-tag"" title=""show questions tagged 'circuit-analysis'"" rel=""tag"">circuit-analysis</a> </div> <div class=""started fr""> <div class=""user-info ""> <div class=""user-action-time""> asked <span title=""2013-08-27 19:07:14Z"" class=""relativetime"">15 hours ago</span> </div> <div class=""user-gravatar32""> <a href=""/users/9913/nijansen""><div class=""><img src=""https://www.gravatar.com/avatar/8250825c174a99613ffeec2ccc085bcf?s=32&d=identicon&r=PG"" alt="" width=""32"" height=""32""></div></a> </div> <div class=""user-details""> <a href=""/users/9913/nijansen"">nijansen</a><br> <span class=""reputation-score"" title=""reputation score"" dir=""ltr"">174</span><span title=""8 bronze badges""><span class=""badge3""></span><span class=""badgecount"">8</span></span> </div> </div> </div> </div> </div> <div class=""question-summary"" id=""question-summary-80371""> <div class=""statscontainer""> <div class=""statsarrow""></div> <div class=""stats""> <div class=""vote""> <div class=""votes""> <span class=""vote-count-post ""><strong>2</strong></span> <div class=""viewcount"">votes</div> </div> </div> <div class=""status answered""> <strong>2</strong>answers </div> </div> <div class=""views "" title=""32 views""> 32 views </div> </div> <div class=""summary""> <h3><a href=""/questions/80371/saturation-current-in-inductor-definition"" class=""question-hyperlink"">Saturation current in inductor - Definition?</a></h3> <div class=""excerpt""> Can somebody explain me what actually is a saturation current of an inductor. You may consider one inductor too and explain the things. This is very much confusing for me. Somebody give me a clear cut ... </div> <div class=""tags t-inductor""> <a href=""/questions/tagged/inductor"" class=""post-tag"" title=""show questions tagged 'inductor'"" rel=""tag"">inductor</a> </div> <div class=""started fr""> <div class=""user-info ""> <div class=""user-action-time""> asked <span title=""2013-08-27 18:38:03Z"" class=""relativetime"">16 hours ago</span> </div> <div class=""user-gravatar32""> <a href=""/users/20352/durgaprasad""><div class=""gravatar-wrapper-32""><img src=""http://i.stack.imgur.com/iQDud.jpg?s=32&g=1"" alt=""></div></a> </div> <div class=""user-details""> <a href=""/users/20352/durgaprasad"">Durgaprasad</a><br> <span class=""reputation-score"" title=""reputation score"" dir=""ltr"">339</span><span title=""9 bronze badges""><span class=""badge3""></span><span class=""badgecount"">9</span></span> </div> </div> </div> </div> </div> <div class=""question-summary"" id=""question-summary-80370""> <div class=""statscontainer""> <div class=""statsarrow""></div> <div class=""stats""> <div class=""vote""> <div class=""votes""> <span class=""vote-count-post ""><strong>3</strong></span> <div class=""viewcount"">votes</div> </div> </div> <div class=""status answered""> <strong>2</strong>answers </div> </div> <div class=""views "" title=""85 views""> 85 views </div> </div> <div class=""summary""> <h3><a href=""/questions/80370/is-it-possible-for-batteries-to-give-a-false-reading-of-being-charged-with-a-mul"" class=""question-hyperlink"">Is it possible for batteries to give a false reading of being charged with a multimeter?</a></h3> <div class=""excerpt""> I bought a Stanley SL5W09L spotlight about four years ago and it has performed wonderfully ever since. Recently however it has stopped working. I can plug it in, and the charge light will come on ... </div> <div class=""tags t-batteries""> <a href=""/questions/tagged/batteries"" class=""post-tag"" title=""show questions tagged 'batteries'"" rel=""tag"">batteries</a> </div> <div class=""started fr""> <div class=""user-info ""> <div class=""user-action-time""> asked <span title=""2013-08-27 18:36:29Z"" class=""relativetime"">16 hours ago</span> </div> <div class=""user-gravatar32""> <a href=""/users/24413/steve-french""><div class=""><img src=""https://www.gravatar.com/avatar/ef46e9c26326bd9d82479c7daf4155a3?s=32&d=identicon&r=PG"" alt="" width=""32"" height=""32""></div></a> </div> <div class=""user-details""> <a href=""/users/24413/steve-french"">Steve French</a><br> <span class=""reputation-score"" title=""reputation score"" dir=""ltr"">119</span><span title=""1 bronze badge""><span class=""badge3""></span><span class=""badgecount"">1</span></span> </div> </div> </div> </div> </div> <div class=""question-summary"" id=""question-summary-80366""> <div class=""statscontainer""> <div class=""statsarrow""></div> <div class=""stats""> <div class=""vote""> <div class=""votes""> <span class=""vote-count-post ""><strong>0</strong></span> <div class=""viewcount"">votes</div> </div> </div> <div class=""status answered""> <strong>1</strong>answer </div> </div> <div class=""views "" title=""37 views""> 37 views </div> </div> <div class=""summary""> <h3><a href=""/questions/80366/arduino-accessing-extra-analog-pins-on-32-pin-smt-package"" class=""question-hyperlink"">Arduino - accessing extra analog pins on 32-pin SMT package</a></h3> <div class=""excerpt""> I've got a 32-pin ATMega328 on a breadboard. I have its analog pin #6 as an input pin from another IC on my board. The IC sends data to this analog pin. Now, the ATMega328 DIP package (used on the ... </div> <div class=""tags t-arduino""> <a href=""/questions/tagged/arduino"" class=""post-tag"" title=""show questions tagged 'arduino'"" rel=""tag"">arduino</a> </div> <div class=""started fr""> <div class=""user-info ""> <div class=""user-action-time""> asked <span title=""2013-08-27 18:07:58Z"" class=""relativetime"">16 hours ago</span> </div> <div class=""user-gravatar32""> <a href=""/users/17082/ryan-tuck""><div class=""><img src=""https://www.gravatar.com/avatar/57bb887b039eb0ca9f976210fe821a2a?s=32&d=identicon&r=PG"" alt="" width=""32"" height=""32""></div></a> </div> <div class=""user-details""> <a href=""/users/17082/ryan-tuck"">Ryan Tuck</a><br> <span class=""reputation-score"" title=""reputation score"" dir=""ltr"">114</span><span title=""5 bronze badges""><span class=""badge3""></span><span class=""badgecount"">5</span></span> </div> </div> </div> </div> </div> <div class=""question-summary"" id=""question-summary-80365""> <div class=""statscontainer""> <div class=""statsarrow""></div> <div class=""stats""> <div class=""vote""> <div class=""votes""> <span class=""vote-count-post ""><strong>6</strong></span> <div class=""viewcount"">votes</div> </div> </div> <div class=""status answered-accepted""> <strong>4</strong>answers </div> </div> <div class=""views "" title=""88 views""> 88 views </div> </div> <div class=""summary""> <h3><a href=""/questions/80365/capacitor-inrush-current"" class=""question-hyperlink"">Capacitor Inrush Current</a></h3> <div class=""excerpt""> I have to filter a power control circuit and as usual I am using lots of capacitors in parallel. Some of these capacitors are Tantalum or Aluminium Polymer types, with ripple current ratings of 3 amps ... </div> <div class=""tags t-capacitor t-inrush-current""> <a href=""/questions/tagged/capacitor"" class=""post-tag"" title=""show questions tagged 'capacitor'"" rel=""tag"">capacitor</a> <a href=""/questions/tagged/inrush-current"" class=""post-tag"" title=""show questions tagged 'inrush-current'"" rel=""tag"">inrush-current</a> </div> <div class=""started fr""> <div class=""user-info user-hover""> <div class=""user-action-time""> asked <span title=""2013-08-27 18:04:39Z"" class=""relativetime"">16 hours ago</span> </div> <div class=""user-gravatar32""> <a href=""/users/15955/mfeinstein""><div class=""><img src=""https://www.gravatar.com/avatar/86b9f964b2a1d7cc66a78a6199801f71?s=32&d=identicon&r=PG"" alt="" width=""32"" height=""32""></div></a> </div> <div class=""user-details""> <a href=""/users/15955/mfeinstein"">mFeinstein</a><br> <span class=""reputation-score"" title=""reputation score"" dir=""ltr"">1,006</span><span title=""11 bronze badges""><span class=""badge3""></span><span class=""badgecount"">11</span></span> </div> </div> </div> </div> </div> <div class=""question-summary"" id=""question-summary-80360""> <div class=""statscontainer""> <div class=""statsarrow""></div> <div class=""stats""> <div class=""vote""> <div class=""votes""> <span class=""vote-count-post ""><strong>0</strong></span> <div class=""viewcount"">votes</div> </div> </div> <div class=""status answered""> <strong>1</strong>answer </div> </div> <div class=""views "" title=""28 views""> 28 views </div> </div> <div class=""summary""> <h3><a href=""/questions/80360/designing-adc-driver-circuit-using-ltc6406"" class=""question-hyperlink"">Designing ADC driver circuit using LTC6406</a></h3> <div class=""excerpt""> I am designing the front end(single ended to differential) for the ADC using LTC6406 to interface with the 20MSPS ADC. My input frequency is 140 MHz. Simulation Sch is shown below: L1, L2 and C1 are ... </div> <div class=""tags t-circuit t-adc""> <a href=""/questions/tagged/circuit"" class=""post-tag"" title=""show questions tagged 'circuit'"" rel=""tag"">circuit</a> <a href=""/questions/tagged/adc"" class=""post-tag"" title=""show questions tagged 'adc'"" rel=""tag"">adc</a> </div> <div class=""started fr""> <div class=""user-info ""> <div class=""user-action-time""> asked <span title=""2013-08-27 17:36:42Z"" class=""relativetime"">17 hours ago</span> </div> <div class=""user-gravatar32""> <a href=""/users/25017/anand-kumar-rai""><div class=""gravatar-wrapper-32""><img src=""http://i.stack.imgur.com/v6adE.jpg?s=32&g=1"" alt=""></div></a> </div> <div class=""user-details""> <a href=""/users/25017/anand-kumar-rai"">Anand Kumar Rai</a><br> <span class=""reputation-score"" title=""reputation score"" dir=""ltr"">183</span><span title=""1 silver badge""><span class=""badge2""></span><span class=""badgecount"">1</span></span><span title=""10 bronze badges""><span class=""badge3""></span><span class=""badgecount"">10</span></span> </div> </div> </div> </div> </div> </div> <br class=""cbt""> <div class=""page-sizer fr""> <a href=""/questions?pagesize=15&amp;sort=newest"" title=""show 15 items per page"" class=""page-numbers current"">15</a> <a href=""/questions?pagesize=30&amp;sort=newest"" title=""show 30 items per page"" class=""page-numbers "">30</a> <a href=""/questions?pagesize=50&amp;sort=newest"" title=""show 50 items per page"" class=""page-numbers "">50</a> <span class=""page-numbers desc"">per page</span> </div> <div class=""pager fl"" > <a href=""/questions?page=1&amp;sort=newest"" title=""go to page 1"" rel=""prev""><span class=""page-numbers prev"">prev </span></a> <a href=""/questions?page=1&amp;sort=newest"" title=""go to page 1""><span class=""page-numbers"">1</span></a> <span class=""page-numbers current"">2</span> <a href=""/questions?page=3&amp;sort=newest"" title=""go to page 3""><span 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class=""item-multiplier-count"">593</span></span><br> <a href=""/questions/tagged/transistors"" class=""post-tag"" title=""show questions tagged 'transistors'"" rel=""tag"">transistors</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">577</span></span><br> <a href=""/questions/tagged/pcb"" class=""post-tag"" title=""show questions tagged 'pcb'"" rel=""tag"">pcb</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">570</span></span><br> <a href=""/questions/tagged/capacitor"" class=""post-tag"" title=""show questions tagged 'capacitor'"" rel=""tag"">capacitor</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">564</span></span><br> <a href=""/questions/tagged/usb"" class=""post-tag"" title=""show questions tagged 'usb'"" rel=""tag"">usb</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">538</span></span><br> <a href=""/questions/tagged/digital-logic"" class=""post-tag"" title=""show questions tagged 'digital-logic'"" rel=""tag"">digital-logic</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">522</span></span><br> <a href=""/questions/tagged/sensor"" class=""post-tag"" title=""show questions tagged 'sensor'"" rel=""tag"">sensor</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">500</span></span><br> <a href=""/questions/tagged/avr"" class=""post-tag"" title=""show questions tagged 'avr'"" rel=""tag"">avr</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">493</span></span><br> <a href=""/questions/tagged/op-amp"" class=""post-tag"" title=""show questions tagged 'op-amp'"" rel=""tag"">op-amp</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">447</span></span><br> <a href=""/questions/tagged/current"" class=""post-tag"" title=""show questions tagged 'current'"" rel=""tag"">current</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">436</span></span><br> <a href=""/questions/tagged/fpga"" class=""post-tag"" title=""show questions tagged 'fpga'"" rel=""tag"">fpga</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">431</span></span><br> <a href=""/questions/tagged/circuit"" class=""post-tag"" title=""show questions tagged 'circuit'"" rel=""tag"">circuit</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">423</span></span><br> <a href=""/questions/tagged/resistors"" class=""post-tag"" title=""show questions tagged 'resistors'"" rel=""tag"">resistors</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">394</span></span><br> <a href=""/questions/tagged/audio"" class=""post-tag"" title=""show questions tagged 'audio'"" rel=""tag"">audio</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">394</span></span><br> <a href=""/questions/tagged/motor"" class=""post-tag"" title=""show questions tagged 'motor'"" rel=""tag"">motor</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">384</span></span><br> <a href=""/questions/tagged/voltage-regulator"" class=""post-tag"" title=""show questions tagged 'voltage-regulator'"" rel=""tag"">voltage-regulator</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">377</span></span><br> <a href=""/questions/tagged/mosfet"" class=""post-tag"" title=""show questions tagged 'mosfet'"" rel=""tag"">mosfet</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">374</span></span><br> <a href=""/questions/tagged/switches"" class=""post-tag"" title=""show questions tagged 'switches'"" rel=""tag"">switches</a>&nbsp;<span class=""item-multiplier""><span class=""item-multiplier-x"">&times;</span>&nbsp;<span class=""item-multiplier-count"">344</span></span><br> </div> </div> </div> </div> <div id=""footer"" class=""categories""> <div class=""footerwrap""> <div id=""footer-menu""> <div class=""top-footer-links""> <a href=""/about"">about</a> <a href=""/help"">help</a> <a 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Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx