This calculator will help you determine the value of the resistor to add in series with the led to limit the current. Calculator is capable of finding suitable standard e12 10% resistor value and power for one led designs. Weve made it even easier for you to calculate the value of this resitor with our led calculator. Led resistor calculator will allow you to calculate, with precision, the ideal resistance for the led you would use, also suggesting how many watts it should be. Software that calculates the resistor value and its power consumption in different led s circuit configurations simple, series o parallel according to the source voltage, the led s voltage and the wanted current value. The rated led voltage is subtracted from the voltage source, and then divided by the desired led operating current. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful. Download software led resistor calculator for free windows. In this led series resistance calculator, enter the values for supply voltage v s, voltage drop v d and forward current i f.
The download is provided as is, with no modifications or changes made on our side. This simple calculator will help you determine the value of any smd resistor. Download resistor color code calculator 4, 5 and 6 band. This calculator gives the values for current limiting resistors for leds. Circuit 3 of simple led circuits leds in parallel the final circuit in the simple led circuits tutorial is leds in parallel. Resistor led calculator for determining the value of the series resistor. The led seriesparallel array wizard is available for those of you who need to do calculations involving more than one led. Thank you for downloading led resistor calculator from our software library.
The current setup file available for download requires 56 kb of hard disk space. Basic electricity resistance and ohms law duration. Led resistor calculator required value of resistor for leds circuit calculator led resistor calculator. There also some tips for user to find led forward voltage. Calculator works on windows xp, vista, 7, but you have to install microsoft. Led resistor value calculator and calculation instructions. Led resistance calculator to calculate the values of the resistor needed to drive an led. For this example, the voltage across the resistor is 10 volts and the maximum on current is 20 milliamperes. Vf or forward voltage is equal to the led voltage drop. Led resistor calculator resistor led calculator for determining the value of the current limiting series resistor when driving a single or more seriesparallel of. The wizard determines the current limiting resistor value for each portion of. Where v is the voltage source, v led is the led voltage and i the led current.
To use the calculator, enter any three known values and press calculate to solve for the others. This calculator is based on the ohms law calculator, but takes into consideration the voltage drop from the led. Fill in the two boxes on the left and the missing vlaue will be calculated and shown on the right. This value is different for various color leds, see the chart. Led resistor calculator single led leds in series leds in parallel voltage drop is usually 1. Resistor color code calculator and chart 4band, 5band or 6. The colors that make up the electrical resistors are shown, to guarantee the easy use of the application. Led s are generally made with the builtin series resistors, which is one of the easiest way to limit and control the flow of the power. This is the new version of the single led series resistance calculator, good for when you have a single led and need to know what resistor should i use with my led. You have to utilize a current limiting resistor in series with the led for protection. This led calculator will help you design your led array and choose the best current limiting resistors values. A current limiting resistor, sometimes called a load resistor, or series resistor, connects in series with a light emitting diode led so that there is a correct forward voltage drop across it. The three calculators below calculate voltage, current or resistance using ohms law.
Once you indicate the colors to calculate, the application will immediately show the result corresponding to the electrical resistance indicated you have the. Supply voltage v s forward voltage v f forward current. When we use leds in circuits we always use a series resistor. The resistance calculator also shows preferred resistor values. Leds are also available in an integrated package with the correct resistor for led operation. But connecting an led directly to a power source can cause an led to burn out. It is very important to select right series resistor before using a led in a circuit. The second calculator gives a more accurate value using these figures, which can be found in the suppliers catalogue. On the other hand, if you use too low of a resistor. To get started, input the required fields below and hit the design circuit. Calculate the value of a load resistor for a light emitting diode led based on supply voltage and led characteristics. To calculate the resistor needed for a simple led circuit, simply take the voltage drop away from the source voltage then apply ohms law.
Calculate the value of the resistor needed for the series led resistor circuit. If your answer is yes, then this tool is specifically designed for you. Led resistor calculator led series resistor calculator. Led calculator current limiting resistor calculator for led. But if you want to know the exact formula for calculating led resistor then please check out the formula box above. Nearest higher rated resistor wattage recommendation for the resistor watts actual single led current ma. Switch to series and parallel capacitor calculator parallel resistor. Dec 30, 2015 this website uses cookies so that we can provide you with the best user experience possible. Download software led resistor calculator for free. Use this tool to calculate the resistance required to drive one or more seriesconnected leds from a voltage source at a specified current level. Led series current limiting resistor calculator useful when designing circuits with a single led or seriesparallel led arrays for both the common smallcurrent 20ma leds and the more expensive, high power leds with currents up to a few amperes. Conversion calculator parallel and series resistor digikey. The following led resistor calculator will help you to find the proper value of resistor for leds circuit to connect with battery.
If you are wondering, what resistor should i use with my led. Office tools downloads led resistor calculator by and many more programs are available for instant and free download. The resistance of the ballast resistor is easy to calculate with ohms law and kirchhoffs circuit laws. Just input the indicated values and press the calculate button. Led series resistor calculator use this tool to calculate the resistance required to drive one or more seriesconnected leds from a voltage source at a specified current level. Lets be honest sometimes the best led resistor calculator is the one that is easy to use and doesnt require us to even know what the led resistor formula is in the first place. Led resistor calculator resistor value for leds circuit. A helpful little utility that allows you to find the value of a standard resistor without memorizing the color codes. The factors that determine the resistance value of the resistor are the supply voltage, vs, the forward voltage drop needed for the led, vf, and the desired current wanted to pass through the led. Software that calculates the resistor value and its power consumption in different leds circuit configurations simple, series o parallel. The program was tested rigorously, but it still may have a few bugs. Download resistor calculator for leds serial and parallel 2. Led series resistor calculator from ab electronics uk. The download version of led resistor calculator is 1.
In this video, i have explained how to calculate the resistance value for leds for different input voltage. Find the value and tolerance of a 4 band, 5 band, or 6 band resistor with our resistor color code calculator or download our color code pdf for reference. This tool calculates the overall resistance value for multiple resistances connected either in series or in parallel. Our resistor color code calculator is a handy tool for reading carboncomposition resistors whether its a 4band, 5band or 6band type. How to find the value of resistor for different types of led s circuits. Find out the value of any smd resistor marked with the threedigit, fourdigit or eia96 code. As another feature the program can calculate the required resistor value for led circuits single led, series connection and parallel connection considering the supply voltage, the voltage drop across the led s as well as the current of the led s. The led seriesparallel array wizard is a calculator that will help you design large arrays of leds. Dec 29, 2015 software that calculates the resistor value and its power consumption in different leds circuit configurations simple, series o parallel according to the source voltage, the leds voltage and the wanted current value. Also includes and ohms law calculator and a resistor color code quiz currently in the process of being implemented. Resistor color coder is a free resistor color code calculator for windows. Resistor calculator calculate the color code of a resistor based on the resistor value and. Vs or supply voltage is equal to the voltage supplied to the circuit.
The following step by step tutorial will help you to find the proper value of resistor or resistors for one or more led s and led s strings circuits to connect with battery and power supply. Led resistor calculator an led resistance calculator is perfect for when you have a single led and need to know which resistor you should use. Led series resistor calculator digikey electronics. Led resistor calculator learning about electronics. The led calculator will display the resistance value, draw a small schematic and show you the color code of the nearest lower and higher. Superbright leds can go from 30ma up to several amps. When you select a resistor for this purpose, choose a device with a power rating between 2 and 10 times the value calculated below in order to avoid excessive. With this event i want to share with you led calculator.
Amplified parts makes no claims, promises, or guarantees about the accuracy, completeness, or adequacy of the contents of this article, and expressly disclaims liability for errors or omissions on the part of the author. So, when in doubt and when its possible dont hesitate to use a multimeter to doublecheck the critical components. If your calculations use estimated forward voltage and on current values, you may run into problems when you hook up your circuit. This led resistor calculator will help you to pick up a right value of resistor for the led in your led circuit, you just have to input the values of source voltage v s, led forward current i f and led forward voltage v f. The current through the circuit is constant so iled is also the current through the resistor. This application helps you identify the colored ring resistance. Weve made it even easier for you to calculate the value of this resitor with our led calculator below. The following led resistor calculator will help you to find the proper value of resistor for led s circuit to connect with battery. The led calculator was great for single leds but when you have several, the wizard will help you arrange them in a series or combined seriesparallel configuration.
Are you having trouble reading resistor color codes. As a bonus, it will also calculate the power consumed by the led. All are shown in the same screen in order to make direct comparisons on values. This led resistor calculator will help you to pick up a right value of resistor for the led in your led circuit, you just have to input the values of source voltage v s, led forward current i f and led. Resistor led calculator for determining the value of the current limiting series resistor when driving a single or more seriesparallel of leds. Led resistor calculator lies within office tools, more precisely calculators. The led calculator was great for single ledsbut when you have several, the wizard will help you arrange them in a series or combined seriesparallel configuration. Apr 23, 20 download resistor color code calculator for free. This calculator helps you identify what is the optimum amount of current to be passed through the led series, that is the amount of current to be limited. Calculating the value of the resistor will require gathering a few bits of information about your led from its data sheet. It lets you calculate the resistance of both 4 band and 5 band resistors.
Consider that if you use too high of a value of resistor, your led might not light or appear very dim. Led calculator current limiting resistor calculator for. Divide the voltage across the resistor, obtained in the previous step, by the led s maximum on current, obtained in step 3. To get started, input the 3 or 4 digit code and hit the calculate button or enter note. A color strip is provided below every band in a resistor from which you have to select a color. Led series resistance refers to the usage of resisters to stabilize the led current. In this circuit, we will try to connect three 5mm white leds in parallel and light them up using a 12v supply. Resistor color code calculator and chart 4band, 5band. The calculator is capable of finding suitable standard e12 10% resistor value and power for one led designs.
How to find the value of resistor for different types of leds circuits. The following step by step tutorial will help you to find the proper value of resistor or resistors for one or more leds and leds strings circuits to connect with battery and power supply. This is the minimum power rating you can use on your resistor. Led resistor calculator required value of resistor for led s circuit calculator led resistor calculator. This led resistor calculator calculates the value of the resistor which you would need in order to produce the desired current to go through the led. Resistor calculator software free download resistor calculator top 4 download offers free software downloads for windows, mac, ios and android computers and mobile devices. Led resistor calculator free download windows version. Note that the information presented in this article is for reference purposes only. The app have a little builtin database with common led. The app have a little builtin database with common led values, but you can also insert custom values. You can calculate the value of electric resistances of four, five and six colors. The resistance required is equal to the supply voltage minus the forward voltage times the number of leds, divided by the forward current.
Our builtin antivirus scanned this download and rated it as 100% safe. The software is periodically scanned by our antivirus system. The following calculator will determine the unknown series resistor value in ohms for the led circuit shown. Resistor calculator software free download resistor.