ECE Undergraduate Laboratories
ECE 291 - Electrical Engineering Laboratory


Resistor Color Code



r

R(Value) = (First Band) (Second Band) x 10(Third Band)

Band four specifies resistor tolerance

Red 2%     Gold 5%     Silver 10%   None 20%

EXAMPLE:
 Red   Red   Yellow   Silver 
2 2 4* 10%

R = 220000 Ω  Or 220 kΩ, 10%

*Remember this is the multiplier, in other words the amount of zeros