This is where those colored bands on a resistor's body come into play. Read more: 12 Major TV Brands Ranked Worst To Best By Customer Satisfaction As explained by Arduino to Go, each color band on ...

Check out the resistor color code reference ... on the front just below the Ohm’s Law equation. On the back is a cheat sheet for reading surface mount resistor codes. [Mathieu] already mentioned ...

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 ... so if anyone would like code a similar app for Android ...