Introduction: How to Read Resistor Color Codes
Step 1: Colored Stripes
Resistor values are marked using colored bands, according to a code developed in the 1920s, when it was too difficult to write numbers on such tiny objects.
Each of the 4 or 5 colored bands corresponds to a number, like you see in the table.
In the 4-band type, the first two bands indicate the first two digits of the value while the third one indicates the number of zeroes that follow (technically it represents a power of ten). The last band specifies the tolerance: in the example below, gold indicates that the resistor value can be 10 k-ohm plus or minus 5%.
Study the resistor color code diagram. Look at the 10 k-ohm resistor on the breadboard - do the stripes match up with this code?
Continue to the next step.
Step 2: Resistors in Your Kit
Sort through the resistors in your Arduino kit - they have the values listed below. In the simulator, you have access to many more values in between!
Continue to the next lesson to learn how to make your Arduino kit look like a spaceship dashboard.
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