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<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>
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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 ...
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<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>
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asked <span title="2013-08-27 22:47:03Z" class="relativetime">11 hours ago</span>
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<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>
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<strong>1</strong>answer
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22 views
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<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>
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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 ...
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<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>
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asked <span title="2013-08-27 22:09:01Z" class="relativetime">12 hours ago</span>
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<a href="/users/15757/mark-lakata">Mark Lakata</a><br>
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<span class="vote-count-post "><strong>2</strong></span>
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<strong>1</strong>answer
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<div class="views " title="61 views">
61 views
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<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 ...
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<a href="/questions/tagged/op-amp" class="post-tag" title="show questions tagged \'op-amp\'" rel="tag">op-amp</a>
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asked <span title="2013-08-27 21:49:14Z" class="relativetime">12 hours ago</span>
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<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>
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<span class="vote-count-post "><strong>4</strong></span>
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<strong>2</strong>answers
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<div class="views " title="64 views">
64 views
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<h3><a href="/questions/80405/5v-regulator-power-dissipation" class="question-hyperlink">5V Regulator Power Dissipation</a></h3>
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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 ...
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<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>
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asked <span title="2013-08-27 21:39:31Z" class="relativetime">13 hours ago</span>
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<a href="/users/10082/david-norman">David Norman</a><br>
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44 views
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<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 ...
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<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>
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asked <span title="2013-08-27 21:29:47Z" class="relativetime">13 hours ago</span>
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<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>
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<a href="/users/28090/golden-bucky">Golden Bucky</a><br>
<span class="reputation-score" title="reputation score" dir="ltr">1</span>
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<strong>1</strong>answer
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58 views
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<h3><a href="/questions/80396/logic-level-translator-caveats" class="question-hyperlink">Logic Level Translator caveats</a></h3>
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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 ...
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<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>
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asked <span title="2013-08-27 20:45:03Z" class="relativetime">13 hours ago</span>
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<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>
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<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>
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<strong>1</strong>answer
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57 views
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<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>
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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 ...
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<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>
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asked <span title="2013-08-27 20:34:56Z" class="relativetime">14 hours ago</span>
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<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>
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<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>
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<strong>2</strong>answers
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<div class="views " title="69 views">
69 views
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<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>
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asked <span title="2013-08-27 19:30:33Z" class="relativetime">15 hours ago</span>
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<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>
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<strong>1</strong>answer
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<div class="views " title="38 views">
38 views
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<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 ...
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asked <span title="2013-08-27 19:29:24Z" class="relativetime">15 hours ago</span>
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<a href="/users/26135/mike-de-klerk">Mike de Klerk</a><br>
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<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 ...
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<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>
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32 views
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<h3><a href="/questions/80371/saturation-current-in-inductor-definition" class="question-hyperlink">Saturation current in inductor - Definition?</a></h3>
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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 ...
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asked <span title="2013-08-27 18:38:03Z" class="relativetime">16 hours ago</span>
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85 views
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<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>
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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 ...
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<a href="/questions/tagged/batteries" class="post-tag" title="show questions tagged \'batteries\'" rel="tag">batteries</a>
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asked <span title="2013-08-27 18:36:29Z" class="relativetime">16 hours ago</span>
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<a href="/users/24413/steve-french">Steve French</a><br>
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37 views
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<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>
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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 ...
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<a href="/questions/tagged/arduino" class="post-tag" title="show questions tagged \'arduino\'" rel="tag">arduino</a>
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asked <span title="2013-08-27 18:07:58Z" class="relativetime">16 hours ago</span>
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<a href="/users/17082/ryan-tuck">Ryan Tuck</a><br>
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<strong>4</strong>answers
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<div class="views " title="88 views">
88 views
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<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 ...
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<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>
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asked <span title="2013-08-27 18:04:39Z" class="relativetime">16 hours ago</span>
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28 views
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<h3><a href="/questions/80360/designing-adc-driver-circuit-using-ltc6406" class="question-hyperlink">Designing ADC driver circuit using LTC6406</a></h3>
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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 ...
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<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>
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asked <span title="2013-08-27 17:36:42Z" class="relativetime">17 hours ago</span>
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<li><a href="http://mathoverflow.net" title="professional mathematicians">MathOverflow</a></li>
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<li><a href="http://stackapps.com" title="apps, scripts, and development with the Stack Exchange API">Stack Apps</a></li>
<li><a href="http://meta.stackoverflow.com" title="meta-discussion of the Stack Exchange family of Q&A websites">Meta Stack Overflow</a></li>
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my $regex = qr/(?<code1><a href="\/questions\/\d+.+?">)(?<code2>.+)(?<code3><\/a)/p;
if ( $str =~ /$regex/g ) {
print "Whole match is ${^MATCH} and its start/end positions can be obtained via \$-[0] and \$+[0]\n";
# print "Capture Group 1 is $1 and its start/end positions can be obtained via \$-[1] and \$+[1]\n";
# print "Capture Group 2 is $2 ... and so on\n";
}
# ${^POSTMATCH} and ${^PREMATCH} are also available with the use of '/p'
# Named capture groups can be called via $+{name}
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 Perl, please visit: http://perldoc.perl.org/perlre.html