What is a resistor color code?

An electronic color code is used to indicate the values or ratings of electronic components, usually for resistors, but also for capacitors, inductors, diodes and others. A separate code, the 25-pair color code, is used to identify wires in some telecommunications cables.

So, what are the colors of resistors?

Components and wires are coded with colors to identify their value and function. The colors brown, red, green, blue, and violet are used as tolerance codes on 5-band resistors only. All 5-band resistors use a colored tolerance band.

How do you read a resistor color code?

Steps
  1. Position the resistor with the gold or silver color band to the right..
  2. Read the color sequence that must be decoded to determine resistance.
  3. Determine the coded number for the resistive value.
  4. Determine the tolerance of the resistor.
  5. Determine the decoded number for the resistive value.

How can we calculate tolerance value of resistors?

The tolerance band is silver, so we multiply our resistance by 0.1. This means that our resistor’s value can be as high as 16.5 Ω or as low as 13.5 Ω. For the third resistor, we’ll perform the calculation in an alternative way. Take the nominal value and multiply it by 1 + your tolerance, which is (1+0.1).
Orient the resistor so you can read the stripes properly. You should read the stripes from left to right. The first stripe is the one that’s closest to one end of the resistor. If this stripe is on the right side of the resistor, turn the resistor around so the first stripe is on the left.
Steps
  1. Remove power from the circuit containing the resistor.
  2. Isolate the resistor from the circuit.
  3. Inspect the resistor.
  4. Read the resistor value visually.
  5. Prepare a digital multimeter (DMM) to measure the resistor.
  6. Measure the resistance.
  7. Determine the actual resistance of the resistor.

Who invented the resistor and when?

Otis Frank Boykin

What is the color coding system?

Color coded filing systems assign colored labels to certain key letters or numbers of the file folder name. Assigning colors to key letters or numbers creates blocks of color or color bars when like numbered or lettered file folders are organized next to one another in your filing equipment.

What is resistor Colour coding?

Components and wires are coded with colors to identify their value and function. The colors brown, red, green, blue, and violet are used as tolerance codes on 5-band resistors only. All 5-band resistors use a colored tolerance band.

How do you read a resistor color code?

Steps
  1. Position the resistor with the gold or silver color band to the right..
  2. Read the color sequence that must be decoded to determine resistance.
  3. Determine the coded number for the resistive value.
  4. Determine the tolerance of the resistor.
  5. Determine the decoded number for the resistive value.

What are the color codes on a resistor?

4 band resistor. The four band color code is the most common variation. These resistors have two bands for the resistance value, one multiplier and one tolerance band. In the example on the left these bands are green, blue, red and gold.

What is the color code for a 4.7 K resistor?

4k7 / 4.7k ohm Resistor Colour Code
Value 4.7 kΩ / 4700 Ω
Type 4 Band Colour Code
Colour Code Yellow, Violet, Red, Gold
Multiplier Red, 100
Tolerance Gold Band ±5%

What is the definition of a resistor?

A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses.
10k / 10k ohm Resistor Colour Code
Value 10 kΩ
Type 4 Band Colour Code
Colour Code Brown, Black, Orange, Gold
Multiplier Orange, 1000
Tolerance Gold Band ±5%

How can we calculate tolerance value of resistors?

The tolerance band is silver, so we multiply our resistance by 0.1. This means that our resistor’s value can be as high as 16.5 Ω or as low as 13.5 Ω. For the third resistor, we’ll perform the calculation in an alternative way. Take the nominal value and multiply it by 1 + your tolerance, which is (1+0.1).
Devices called resistors let us introduce precisely controlled amounts of resistance into electrical circuits. Photo: Four typical resistors sitting side by side in an electronic circuit. A resistor works by converting electrical energy into heat, which is dissipated into the air.
220R / 220 ohm Resistor Colour Code
Value 220 Ω
Type 4 Band Colour Code System
Colour Code Red, Red, Brown, Gold
Multiplier Brown, 10
Tolerance Gold Band ±5%

What color is a 330 ohm resistor?

330R / 330 ohm Resistor Colour Code
Value 330 Ω
Type 4 Band Colour Code System
Colour Code Orange, Orange, Brown, Gold
Multiplier Brown, 10
Tolerance Gold Band ±5%

What is the function of a resistor in a circuit?

The main function of resistors in a circuit is to control the flow of current to other components. Take an LED (light) for example. If too much current flows through an LED it is destroyed. So a resistor is used to limit the current.

Is a light bulb a type of resistor?

The reason a light bulb glows is that electricity is forced through tungsten, which is a resistor. The energy is released as light and heat. A conductor is the opposite of a resistor. Electricity travels easily and efficiently through a conductor, with almost no other energy released as it passes.

Is a resistor ohmic?

Ohmic resistors are those resistors that have a constant resistance. In other words, the follow the Ohm’s law. If you take such a resistor, apply voltage across it, whilst measuring current and voltage, and then draw a graph of current versus voltage, you get a straight line.

Is a led a resistor?

Resistors in Light Emitting Diode (LED) Circuits. An LED (Light Emitting Diode) emits light when an electric current passes through it. The simplest circuit to power an LED is a voltage source with a resistor and an LED in series. If the voltage source is equal to the voltage drop of the LED, no resistor is required.
A resistor is a device that opposes the flow of electrical current. The bigger the value of a resistor the more it opposes the current flow. The value of a resistor is given in ohms and is often referred to as its ‘resistance‘.