He came up with Ohm Sense, an iPhone app that will take a picture of a resistor and calculate the value based on the color bands ... [Alex] says the coding only took a week, so if anyone would ...

The resistor color code chart is always nice to have on hand, so I included that. Tolerance is one thing I just don’t have memorized (except for the gold 5% band, of course). I also like to look ...

The first and second color ... fourth band indicates the tolerance. For example, if the first two bands are black and red, the corresponding value is “02.” If the third band is yellow, that represents ...