How to read 4 band resistor color code

The four-band Resistor shadeation code calculator is used to calculate the resistance of four-band shadeation-coded resistors. Select the bands to discover the resistance fee.

First band

Brown

Second Band

Black

Third Band

Black

Fourth Band

Gold

Resistance of four Band Resistor is:

10 ± 5%

The values of resistance and the wattage resistor color code score of huge electricity resistors are imprinted on their bodies. The resistance of small carbon and steel movie resistors isn’t always categorized on their bodies. Instead, diverse colored bands are carved radially at our bodies of carbon resistors.

One can study the shadeation bands to discover the fee of resistors. A sedation-coded resistor may incorporate four, 5, or 6 bands. While four Band resistors are the maximum famous kind of colored resistors they’re broadly hired in electronics, hobbyists, and college projects.

How to Read a four Band Resistor

The first band from the left represents the primary enormous figure (digit) of resistance. The 2nd band represents the second enormous digit of the resistance. The 0.33 band is the multiplier. The fourth band represents the tolerance fee to which resistance can vary. The fourth band is generally silver or golden in shadeation.

As stated formerly the maximum essential rule which ought to be accompanied for analyzing the resistors is to begin from the primary band (that’s at the left aspect). There are methods to discover the primary band from the left aspect. The first band is relatively carved toward the leg in comparison to the fourth. The fourth band is specific because it’s miles silver or golden, Both those hues aren’t used withinside the first band.

The four-band chart for calculating resistance is proven below:

four-band-resistor-shadeation-code-chart example of four Band Resistor Color Coding

Let`s recall a resistor whose bands from the left aspect are Brown, Black, Red, and Gold.

four-band-1-k-resistor-brown-black-red-gold

Brown shadeation suggests that the first enormous digit is 1, while black suggests the second enormous digit is 0. Red shadeation suggests a multiplier of a hundred Ω and the rightmost golden band suggests a tolerance of 5%. So, a Brown, Black, Red, and Gold colored resistor is decoded as 10*100Ω ±5% or 1 kΩ ± 5%.

The listing of maximum normally used resistors and their bands are indicated below:

Resistance 1st band 2d Band third band 4th Band

a hundred Ω ±5% Brown Black Brown Gold

470 Ω ±5% Yellow Violet Brown Gold

1 kΩ ±5% Brown Black Red Gold

2.2 kΩ ±5% Red Red Red Gold

10 kΩ ±5% Brown Black Orange Gold

22 kΩ ±10% Red Red Orange Silver

1 MΩ ±5% Brown Black Green Gold

Example problems

Example # 1: A 12 V battery connects to a resistor whose beads are Yellow, Violet, Brown, and Gold. Calculate the anticipated modern-day which flows thru the circuit.

Solution: The resistor is decoded to be 470 ohms. From Ohm`s law, we calculate the modern-day:

I = V/R = 12 V / 470 Ω = 25.fifty three Amps

Example # 2: A Brown, Black, Green, and Gold bead resistor connects to a relay which calls for 10 mA actuating modern-day. A 10 V supply connects to the circuit. Comment on the popularity of the relay.

Solution: From the bands, the resistance is studied as 1 MΩ. In this circumstance the modern-day flowing thru the circuit is:

I = V/R = 10 V/1 MΩ = 10 µA

The relay calls for 10 mA modern-day operation.

In the gift case, the modern-day thru circuit is simply too lower. Hence the relay will now no longer operate. Resistors are the first and most important electrical tool that resists the glide of an electrical modern-day thru circuit. It is a tool utilized in electric circuits to govern or sluggish the glide of a modern-day.

Resistors serve to save you from such things as blowing up batteries or melting wires.

The values of resistors are indicated with shadeation codes, or in this case, shadeation bands. There is a diagnosed global fashionable for this coding. Most resistors have everywhere among 3 to 6 bands. Two bands suggest the resistance fee and one band serves as a multiplier.

Resistors are available in many forms. Some are as easy as a coil of twine fabricated from fabric that may be a terrible conductor, inclusive of powdered carbon. Other terrible conducive substances encompass carbon composition, carbon movie, steel movie, and wire wound. Low noise circuits will usually use low resistor values and coffee voltage anywhere possible. Resistors typically have 1%, 2%, 5%, and 10% of tolerance. Keep in mind, resistors will have inductance.

A potentiometer is taken into consideration as a variable resistor that may be adjusted to boom or lower resistance relying on which the Printed circuit board in china of the 3 terminals is selected. There is likewise an image resistor (photocell). An image resistor whilst uncovered to mild, its resistance decreases, in flip making it a remarkable mild sensor.

To use Suntsu`s Resistor Color Code, first, you need to recognize the way to study it.

First and most important, shadeation bands are used to study the values of resistors. Printed numbers could be too small to study. Bands on resistors are “grouped” which means the gaps among them aren’t equal.

The large hole is positioned earlier than the tolerance band. So, you may region the larger hole at the left and study from left to proper. Oftentimes, the tolerance resistor is marked a steel shadeation: gold, and silver, respectively. One element to note, a resistor code in no way begins offevolved with the steel gold and silver. If you spot the one’s hues, it’s miles the tolerance fee and desires to be positioned at the proper aspect and retain to study it from left to proper.