Here is a handy tool to have on your iPhone! Especially for those who are color blind and cant identify the color bands on resistors. It's called "Resistor Photo ID" and it was developed by Rich Olson of NothingLabs.
Using resistor ID is easy:
If for any reason Resistor Photo ID doesn't detect the correct color for a band - you can easily override it.
[Source] http://nothinglabs.blogspot.com
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