Resistor Color Code Guide, ca. Colorbands were used because they were easily and cheaply printed on tiny components. Overheating of a component or dirt accumulation, may make it impossible to how to identify electronic components pdf brown from red or orange.
Advances in printing technology have now made printed numbers practical on small components. The larger gap before the tolerance band is somewhat difficult to distinguish. A diagram of a 2. To distinguish left from right there is a gap between the C and D bands. These values repeat for every decade of magnitude: 6. 8, 68, 680, and so forth.
12th root of 10, and E6 series by the sixth root of 10. The tolerance of device values is arranged so that every value corresponds to a preferred number, within the required tolerance. They are marked with a single black band. Capacitors may be marked with 4 or more colored bands or dots. The colors encode the first and second most significant digits of the value, and the third color the decimal multiplier in picofarads. Additional bands have meanings which may vary from one type to another.
It is usually, but not always, possible to work out what scheme is used by the particular colors used. Extra bands on ceramic capacitors identify the voltage rating class and temperature coefficient characteristics. A white tolerance ring may indicate custom specifications. 1N” prefix was assumed, and the balance of the part number was given by three or four rings. EIA 3-dot and 6-dot color codes, giving capacitance value, tolerance, working voltage, and temperature characteristic.