[MakeLV] Fwd: Ohm Sense makes sense of resistor color bands

[Josiah Ritchie]

:-) That's great! Thanks for sharing Chris. I've often been fascinated
with how people all over come up with the same ideas around the same
time independently. Now I just need the required hardware to run the
app.

JSR/

On 8/6/11, Chris Callie <reddog176 at gmail.com> wrote:
> For those of you that don't follow Hack-A-Day. Looks like someone read our
> mailing list, and made the resistor app!
>
> Chris Callie
> ------------------------
> Mail: reddog176 at gmail.com
> Web: http://www.google.com/profiles/reddog176
>
>
> ---------- Forwarded message ----------
> From: Reddog176 <reddog176 at gmail.com>
> Date: Sat, Aug 6, 2011 at 4:17 PM
> Subject: Ohm Sense makes sense of resistor color bands
> To: Chris Callie <reddog176 at gmail.com>
>
>
>
>
> Sent to you by Reddog176 via Google Reader:
>
>
> Ohm Sense makes sense of resistor color
> bands<http://feedproxy.google.com/~r/hackaday/LgoM/~3/v87QjycaXNI/>
>  via Hack a Day <http://hackaday.com> by Brian Benchoff on 8/6/11
>
>  <http://hackadaycom.files.wordpress.com/2011/08/phone.png>
>
> [Alex Busman]‘s first foray in iOS programming looks like a pretty useful
> tool. He came up with Ohm
> Sense<http://itunes.apple.com/us/app/ohm-sense/id453570510?ls=1&mt=8>,
> 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 emotional
> cost of our relationship with
> Violet<http://en.wikipedia.org/wiki/List_of_electronic_color_code_mnemonics>
> .
>
> [Alex]‘s used OpenCV <http://opencv.willowgarage.com/wiki/> 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 tip
> line <http://hackaday.com/contact-hack-a-day/>.
>
> This isn’t [Alex]‘s first Hack A Day build. We featured his Handy Board
> project<http://hackaday.com/2011/06/28/handy-board-plays-music-with-an-nes-controller/>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 *someone* did something productive with their summer.
>
> [Alex] posted a demo of his resistor app on YouTube. Check it out below.
> <http://hackaday.com/2011/08/06/ohm-sense-makes-sense-of-resistor-color-bands/>
> Filed under: iphone hacks
> <http://hackaday.com/category/iphone-hacks/>, Software
> Development <http://hackaday.com/category/software-development/>, tool
> hacks<http://hackaday.com/category/tool-hacks/>
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