For those of you that don't follow Hack-A-Day. Looks like someone read our mailing list, and made the resistor app!<div><br clear="all">Chris Callie<br>------------------------<br>Mail: <a href="mailto:reddog176@gmail.com" target="_blank">reddog176@gmail.com</a><br>

Web: <a href="http://www.google.com/profiles/reddog176" target="_blank">http://www.google.com/profiles/reddog176</a><br>
<br><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Reddog176</b> <span dir="ltr"><<a href="mailto:reddog176@gmail.com">reddog176@gmail.com</a>></span><br>Date: Sat, Aug 6, 2011 at 4:17 PM<br>

Subject: Ohm Sense makes sense of resistor color bands<br>To: Chris Callie <<a href="mailto:reddog176@gmail.com">reddog176@gmail.com</a>><br><br><br><div style="margin:0px 2px;padding-top:1px;background-color:#c3d9ff;font-size:1px !important;line-height:0px !important">

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<div style="padding:4px;background-color:#c3d9ff"><h3 style="margin:0px 3px;font-family:sans-serif">Sent to you by Reddog176 via Google Reader:</h3></div>
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<div style="font-family:sans-serif;overflow:auto;width:100%;margin:0px 10px"><h2 style="margin:0.25em 0 0 0"><div><a href="http://feedproxy.google.com/~r/hackaday/LgoM/~3/v87QjycaXNI/" target="_blank">Ohm Sense makes sense of resistor color bands</a></div>

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<div style="margin-bottom:0.5em">via <a href="http://hackaday.com" target="_blank">Hack a Day</a> by Brian Benchoff on 8/6/11</div><br>
<p><a href="http://hackadaycom.files.wordpress.com/2011/08/phone.png" target="_blank"><img title="phone" src="http://hackadaycom.files.wordpress.com/2011/08/phone.png?w=450&h=369" alt="" width="450" height="369"></a></p>


<p>[Alex Busman]‘s first foray in iOS programming looks like a pretty useful tool. He came up with <a href="http://itunes.apple.com/us/app/ohm-sense/id453570510?ls=1&mt=8" target="_blank">Ohm Sense</a>, an iPhone app that will take a picture of a resistor and calculate the value based on the color bands. It’s a great tool that we wish we had when we were starting out. At 99 cents, the app is also much cheaper than the <a href="http://en.wikipedia.org/wiki/List_of_electronic_color_code_mnemonics" target="_blank">emotional cost of our relationship with Violet</a>.</p>


<p><span></span></p>
<p>[Alex]‘s used <a href="http://opencv.willowgarage.com/wiki/" target="_blank">OpenCV</a> for processing of the image data. The app works by scanning the image from the top-left corner and continuing until it sees a beige rectangle. After a bounding box is drawn around the resistor, the iPhone scans the image for columns of color. After a little interpretation, the value of the resistor is displayed on the screen. While it only works on resistors with beige plastic now, [Alex] says he’ll expand that in the future to include blue bodied metal-oxide resistors. [Alex] says the coding only took a week, so if anyone would like code a similar app for Android, be sure to tell us on our <a href="http://hackaday.com/contact-hack-a-day/" target="_blank">tip line</a>.</p>


<p>This isn’t [Alex]‘s first Hack A Day build. We featured his <a href="http://hackaday.com/2011/06/28/handy-board-plays-music-with-an-nes-controller/" target="_blank">Handy Board project</a> that uses an NES controller to play some chiptunes earlier this summer. Compared to the projects we’ve let slip over the last few months, it’s good to see <em>someone</em> did something productive with their summer.</p>


<p>[Alex] posted a demo of his resistor app on YouTube. Check it out below.</p>
<span style="text-align:center;display:block"><a href="http://hackaday.com/2011/08/06/ohm-sense-makes-sense-of-resistor-color-bands/" target="_blank"><img src="http://img.youtube.com/vi/Nk0AEv8825U/2.jpg" alt=""></a></span>
<br>Filed under: <a href="http://hackaday.com/category/iphone-hacks/" target="_blank">iphone hacks</a>, <a href="http://hackaday.com/category/software-development/" target="_blank">Software Development</a>, <a href="http://hackaday.com/category/tool-hacks/" target="_blank">tool hacks</a>  <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gocomments/hackadaycom.wordpress.com/51511/" target="_blank"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/comments/hackadaycom.wordpress.com/51511/"></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godelicious/hackadaycom.wordpress.com/51511/" target="_blank"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/delicious/hackadaycom.wordpress.com/51511/"></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gofacebook/hackadaycom.wordpress.com/51511/" target="_blank"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/facebook/hackadaycom.wordpress.com/51511/"></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gotwitter/hackadaycom.wordpress.com/51511/" target="_blank"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/twitter/hackadaycom.wordpress.com/51511/"></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/gostumble/hackadaycom.wordpress.com/51511/" target="_blank"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/stumble/hackadaycom.wordpress.com/51511/"></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/godigg/hackadaycom.wordpress.com/51511/" target="_blank"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/digg/hackadaycom.wordpress.com/51511/"></a> <a rel="nofollow" href="http://feeds.wordpress.com/1.0/goreddit/hackadaycom.wordpress.com/51511/" target="_blank"><img alt="" border="0" src="http://feeds.wordpress.com/1.0/reddit/hackadaycom.wordpress.com/51511/"></a> <img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=hackaday.com&blog=4779443&post=51511&subd=hackadaycom&ref=&feed=1" width="1" height="1">
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