Calculators Of course ElectroDroid allows you to calculate the value of resistors from the color code and back again, and will give you a resistor value from an SMD resistor code.

Check out the resistor color code reference cards I just whipped up. I was inspired by the PCB versions that Octopart has been crowdfunding this week. Those didn’t have the information I woul… ...

They are in the FRFS0402 Series, based on ‘Z1 Foil’ precision foil resistor elements by Vishay Precision Group. As well as 0.05%, four other tolerance ratings are available: 0.1, 0.25, 0.5 and 1%.