[NJARC] Read resistor values with your smart phone.
Thomas Lee
thomas_v_lee at hotmail.com
Fri May 15 08:59:47 EDT 2015
Hi Al,
I installed it on my android phone. Just access the link via your cell to download, it will prompt you to buy it, bypass that prompt and install. Perhaps the link doesn't work since I cut and pasted it. I will forward you the email from hackaday.
I tired the app out and it doesn't work on blue resistors, and you have to have a very hand when scanning the resistor, I had to pivot the cell on a table to get it steady enough to get a good reading. I'm sure they will improve on it soon.
Tom
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Thomas,
Have you actually found the app, especially for Android?
All I see is computer geek BS like this:
https://github.com/thegouger/ResistorScanner
Demo is pretty impressive however:
https://www.youtube.com/watch?v=h_bITwduLPk
Al
Al Klase -- N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/
On 5/15/2015 3:33 AM, Thomas Lee wrote:
> Just remember
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This is a cut and a paste from hackaday
Reading Resistors With OpenCV
by Brian Benchoff
Here's a tip from
a wizened engineer I've heard several times. If you're
poking around a circuit that has failed, look at the
resistor color codes. Sometimes, if a resistor overheats,
the color code bands will change color - orange to brown,
blue to black, and so forth. If you know your preferred
numbers for resistors, you might find a resistor with a
value that isn't made. This is where the circuit was
overheating, and you're probably very close to discovering
the problem.
The problem with
this technique is that you have to look at and decode all
the resistors. If automation and computer vision is more
your thing, [Parth] made an Android app that will
automatically tell you the value of a resistor by pointing a
camera at it.
The code uses OpenCV to scan a small
line of pixels in the middle of the screen. Colors are
extracted from this, and the value of the resistor is
displayed on the screen.
The app is
available for free on the Google Play store.
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