This SMD Resistor code calculator will decode 4 code types: Standard 3 digit code that can include: Standard 4 digit code that can include “R” to indicate a decimal point. EIA-96 1% code with a number in the range 01 to 96, followed by a letter2, 5, and 10% code with a letter, followed by a numbers in the range 01 to 60. Utmel's SMD Resistor Code Calculator helps you determine the resistance value of an SMD resistor using the markings found on the device. Choose the code format: three-digit EIA, four-digit EIA, or EIA-96. Then select the markings. SMD Resistor Code Calculator. Sound card color codes. Almost all sound cards use standard color codes for input/output connector jacks. In many cards, the microphone connector will be pink, the line out or headphone will be lime green, and the stereo line in will be light blue. The application is an easy-to-use SMD-code calculator for calculating the resistance of a resistor. The application supports the 3-digits, 4-digits, and EIA-96 coding systems.ResistorA resistor is a component that is used in electrical circuits to limit the current flow.

Resistor color code calculator

The calculator above will display the value, the tolerance and performs a simple check to verify if the calculated resistance matches one of the EIA standard values. Select the first 3 or 4 bands for 20%, 10% or 5% resistors and all 5 bands for precision (2% or less), 5-band resistors. Hover above the tolerance for min. and max. range values.

If you want to find out the color bands for a value, use the tool on the left. Enter the value, select the multiplier (Ω, K or M), the desired precision and hit 'Display resistor' or ENTER. You can also type in resistor values in shorthand notation like 1k5, 4M7 or 100R.

Standard EIA Decade Resistor Values:

E6 series: (20% tolerance)
10, 15, 22, 33, 47, 68

E12 series: (10% tolerance)
10, 12, 15, 18, 22, 27, 33, 39, 47, 56, 68, 82

E24 series: (5% tolerance)
10, 11, 12, 13, 15, 16, 18, 20, 22, 24, 27, 30, 33, 36, 39, 43, 47, 51, 56, 62, 68, 75, 82, 91

E48 series: (2% tolerance)
100, 105, 110, 115, 121, 127, 133, 140, 147, 154, 162, 169, 178, 187, 196, 205, 215, 226, 237, 249, 261, 274, 287, 301, 316, 332, 348, 365, 383, 402, 422, 442, 464, 487, 511, 536, 562, 590, 619, 649, 681, 715, 750, 787, 825, 866, 909, 953

E96 series: (1% tolerance)
100, 102, 105, 107, 110, 113, 115, 118, 121, 124, 127, 130, 133, 137, 140, 143, 147, 150, 154, 158, 162, 165, 169, 174, 178, 182, 187, 191, 196, 200, 205, 210, 215, 221, 226, 232, 237, 243, 249, 255, 261, 267, 274, 280, 287, 294, 301, 309, 316, 324, 332, 340, 348, 357, 365, 374, 383, 392, 402, 412, 422, 432, 442, 453, 464, 475, 487, 491, 511, 523, 536, 549, 562, 576, 590, 604, 619, 634, 649, 665, 681, 698, 715, 732, 750, 768, 787, 806, 825, 845, 866, 887, 909, 931, 959, 976

E192 series: (0.5, 0.25, 0.1 and 0.05% tolerance)
100, 101, 102, 104, 105, 106, 107, 109, 110, 111, 113, 114, 115, 117, 118, 120, 121, 123, 124, 126, 127, 129, 130, 132, 133, 135, 137, 138, 140, 142, 143, 145, 147, 149, 150, 152, 154, 156, 158, 160, 162, 164, 165, 167, 169, 172, 174, 176, 178, 180, 182, 184, 187, 189, 191, 193, 196, 198, 200, 203, 205, 208, 210, 213, 215, 218, 221, 223, 226, 229, 232, 234, 237, 240, 243, 246, 249, 252, 255, 258, 261, 264, 267, 271, 274, 277, 280, 284, 287, 291, 294, 298, 301, 305, 309, 312, 316, 320, 324, 328, 332, 336, 340, 344, 348, 352, 357, 361, 365, 370, 374, 379, 383, 388, 392, 397, 402, 407, 412, 417, 422, 427, 432, 437, 442, 448, 453, 459, 464, 470, 475, 481, 487, 493, 499, 505, 511, 517, 523, 530, 536, 542, 549, 556, 562, 569, 576, 583, 590, 597, 604, 612, 619, 626, 634, 642, 649, 657, 665, 673, 681, 690, 698, 706, 715, 723, 732, 741, 750, 759, 768, 777, 787, 796, 806, 816, 825, 835, 845, 856, 866, 876, 887, 898, 909, 920, 931, 942, 953, 965, 976, 988

FAQs

I have a 6-band resistor. How can I calculate its value?

Enter the first five colors. Resistors with 6 bands are basically 5-band resistors with an additional ring indicating the reliability or the temperature coefficient.

The resistor has only 3 bands

You don't have to enter the 4th band, as 20% resistors don't have a tolerance ring. They will be calculated using the 4 band rule (digit, digit, multiplier).

Examples:
Red, red, brown is a 220 ohm, 20% resistor
Brown, black, orange is a 10k, 20% resistor

Which band is the first?

The short answer: you'll know that from experience! But there are some rules you can follow:

1.) Some resistors have the color bands grouped together and/or close to one end. Hold the resistor with the closely grouped bands to your left and read the resistor from the left to the right.

2.) With 5% and 10% resistors the procedure is simple: hold the resistor with the silver or gold band to the right and read the resistor from the left to the right.

3.) The first band can't be silver or gold, so if you hold such a resistor you'll know instantly where to start. Also, the 3rd color for 4-band resistors will be blue (10⁶) or less and the 4th color for 5 band resistors will be green (10⁵) or less, as basic resistor values range from 0.1 Ohm to 10 Mohms.

What happens, if I start reading from the wrong end?

Smd Resistor Code Calculator Software Download

You should always attempt to work out the value, then check your result against a resistor value chart to see if it's listed there. If it isn't, then try reading it again starting from the other end and check again. This is a necessary step especially with five and six banded metal film resistors.

Our color code calculator runs this check automatically for you, and if the result is not a standard value, it will display a small tip. The warnings are there for your information only and do not always imply that the resistor is was read the wrong way -- see the notes below.

Notes

1.) The resistor color code and the EIA preferred values are internationally accepted standards, but some manufacturers have their own way of doing things. For example, many resistor manufacturers make every single value on the E24 list in 1% and 2% tolerance even though the practice makes little mathematical sense.

2.) Although the program was tested rigorously, it still may have a few bugs. Therefore, when in doubt (and when it's possible) don't hesitate to use your trusted, old friend -- the multimeter -- to double-check the critical components.

Examples

3 bands:

Yellow, violet, black --> 47 ohm 20%

Orange, orange, brown --> 330 ohm 20%

Brown, black, red --> 1k 20%

4 bands:

Green, blue, red, gold --> 5.6kohm 5%

Red, yellow, orange, gold --> 24kohm 5%

Blue, gray, yellow, silver --> 680k 10%

More 4 band resistor color code examples: E12 and E24 series.

5 bands:

Red, yellow, orange, black, brown --> 243 ohms, 1% precision 5-band resistor

Yellow, violet, gold, gold, yellow --> 4.7 ohms, 5% - this resistor is calculated with the 4-band rule (the yellow band is ignored).

Orange, black, black, brown, brown --> 3.00 k ohms, 1% - note: this is a non-standard 1% (E96) resistor, but some manufacturers make every value from the E24 series with 1% tolerance!

More: 5 band E48 (2%) series resistor color code examples.

6 bands:

Red, red, brown, brown, brown, red --> 2.21k, 1% 50ppm/°C

White, black, white, brown, red, red --> 9.09k, 2% 50ppm/°C

- do not enter the last band (red in the two examples above)

Hobby Electronics -> Resistor color code table -> Resistor color code calculator

In this project, we will take a look at an interesting product called the WS2812B Addressable LEDs. They are individually addressable RGB LEDs and are also called by different names like NeoPixel by Adafruit, for example. In this tutorial, we will learn about the WS2812B LEDs, its internal structure and construction and also how to control individually addressable LEDs using Arduino.

Introduction

If you have made some sort of LED related project, then you probably might have used discrete LEDs (either through hole or SMD). These LEDs may be single color LEDs or RGB LEDs.

The main drawback of discrete LEDs is that if you use them in an array, you lose the privilege to control them individually. For example, if you connect three or four LEDs to a single pin of Arduino using a transistor, then all the LEDs in the array will have a same behavior i.e. brightness control or color change.

Another scenario is that you might have also used LED Strip Lights for Christmas decoration or regular home lighting. You might have observed that even in expensive LED Strip Lights, you do not have the feature to control individual LEDs.

If your aim is to control individual LEDs in a strip, then WS2812B Addressable RGB LEDs are the answer for you.

WS2812B Addressable LEDs

The WS2812B Addressable LED Strip is an intelligent light source that contains a control IC and an RGB LED in a same package, usually in SMD 5050 form factor. The following image shows a strip of WS2812B LEDs.

Smd Resistor Code Calculator

At first glance, it looks like a regular LED strip. But upon a closer inspection, you can find the WS2812B LED Control IC integrated into the SMD 5050 RGB LED Package. The following blown up image shows the same.

Individual WS2812B LED Block has four pins namely VDD, VSS (GND), DIN and DOUT. The functions of these pins are very simple and the following table gives a simple function description of the pins.

The power supply for the WS2812B IC is also supplied through the VDD Pin.

WS2812B LED Application Circuit

To understand how the WS2812B LEDs can be individually controlled, the following application circuit will be useful. All the WS2812B LEDs are connected in a cascade manner where the DO of the first LED is connected to the DIN of the second LED and so on.

But the first LED has to receive data through its DIN pin from a Microcontroller like Arduino. The following image shows the typical application circuit block diagram.

The data transfer protocol used by the WS2812B LEDs is NRZ Mode. The first DIN Port of the WS2812B LED array receives data from the microcontroller. The data for individual pixel is of 24-bit that consists of individual Red, Green and Blue LED control data of 8-bits each. The order of data must be GRB and the composition of the 24-bit data is shown below. Note that HIGH bit data is sent first.

Once the first WS2812B Block receives the first 24-bit data, the data is sent to its internal latch for further decoding. The remaining data is reshaped by its signal reshaping and amplification circuit and is passed to the next pixel in the cascade through the DO pin.

How to Control WS2812B LED using Arduino?

Now, let us proceed to control the WS2812B LED Array using Arduino. Before going further into designing the schematic, there is one important thing we need to address i.e. the power supply to the project.

Each Individual WS2812B LED Pixel has three LEDs and a control IC. So, the current requirement of one pixel is around 60 mA. If you have a strip that contains 20 WS2812B Individually Addressable LEDs, then the total current requirement is 20 * 60 mA = 1.2 A.

This is more than Arduino can supply, either through the USB port (which can supply a maximum of 300 mA) or through 5V barrel jack (which can supply a maximum of 900 mA).

Smd Resistor Calculator

So, the best way to power up the project i.e. both Arduino and the WS2812B LED Strip is with the help of an external 5v supply that can provide enough current.

Now that the power supply part of the project is clear, we can now proceed with the schematic of the project.

Circuit Diagram

Smd Resistor Code Calculator Free Download

The following image shows connection between Arduino UNO and the WS2812B RGB LED Strip. The 5V of Arduino UNO and the LEDs are connected to an external power supply along with the GND (VSS).

The DIN pin of the LED Strip is connected to Digital IO pin 7 of the Arduino through a 330Ω Resistor.

Smd Resistor Color Code Calculator Free Download

Components Required

• Arduino UNO
• WS2812B LEDs
• 5V Power Supply (minimum 2A)
• 330Ω Resistor

Programming Arduino

The first step for programming Arduino is to download a supporting library called “FastLED”. You can download the library from the following link: “FastLED Library”.

Extract the contents of the zip file and rename the folder as “FastLED”. Move this folder to the libraries folder of the Arduino.

Code

Conclusion

Smd Transistor Code Calculator

A simple introduction to WS2812B Individually Addressable LEDs is given in this tutorial along a project to show how we can control WS2812B LEDs with Arduino. If you understand these basics, then you can implement a wide range of projects.

Smd Resistor Code Calculator