is there any other way to find the resistance of resister except color coding..
please tell me, All comments are moderated before being published. The calculation of how a resistor reduces Voltage (pressure), is very important in electronics. Hello, I have a problem with a 30 year old circuit. Select the correct calculator below based on the number of bands your resistor has. why is it 180,000 ohms? If we use a 10KΩ as our R 1 resistor, plugging in the values, we get R 2 = (V)(R 1 )/(V IN - V)= (3V)(10KΩ)/(5V - 3V)= 15KΩ. Many thanks. amzn_assoc_default_search_phrase = "resistor kits"; Keep it up. I find a lot of websites are not that helpful, but I must congratulate you on this site which is lovely to use and so helpful, well done and many thanks. Calculate the Forward Current of LED‘s. Choose the color of each band and the tool will calculate the value of resistance for you. What type of resistor is it and how can I tell the wattage? Step 2: THE RESISTOR. However it is marked with what appears to be a small A connected to a Z and then 0.15 ohm. for manimum resistance value, 21kΩ or 21000Ω – 5% = 19,950Ω. Just use the standard resistor values chart to find the nearest highest value available. amzn_assoc_ad_type = "smart"; Select the color codes from the bands on the resistor. Note: The following are command line instructions. Select the band’s colors and let the tool work for you. How to use the code on development PC. for maximum resistance value, 21kΩ or 21000Ω + 5% = 22,050Ω. I've typed this into multiple resistor calculators and they all say 180k ohms. I hope m correct. So, you will get the resistor value and then use it in first formula to calculate the discharge time constant. If you’re interested, this is covered by milspec MIL-HDBK-199. Therefore the current carrying capacity of the resistance is 100 Amps. The system voltage V is 11kV. Don’t let this confuse you! I consulted with Alasdair, one of our Engineers and here is his suggestion; “This is a tricky one. This is the minimum power rating you can use on your resistor. Hold the resistor with the gold or silver band to the right and read the color codes from the left to the right. How to Find the Value of Resistor for different types of LED’s Circuits. This site is rely helpfull keep it up sir. Believe it or not, there is a something called a zero-ohm resistor! Also, nearby is a diode. How to calculate the resistance? To make this easy, they just reused the same machines that place resistors on the boards by creating a zero-ohm resistor! Thank you for your good tuition on how to calculate the value for a resistor with colours. Pay securely using credit / debit card or by Paypal. The formula for calculating a resistor is: R = ab X c ± d. To calculate the resistance of this resistor (brown, blue, red, and gold) we would use the resistor chart or resistor calculator and find the following: This would make our resistor calculation as follows: 16 X 100 ± 5%. High voltage resistors have a different chemical makeup due to the fact that their paints can not have metallic particles in them for safety and reliability purposes. I Can only get 3.9Kohms, would I be able to use this? These will often have an additional band that indicates the reliability rating in hours of the resistor, specifically for failure rate percentage per 1000 hours of service. Using standard resistor values can greatly impact the accuracy and predictability of a circuit by eliminating rounding errors incurred at the end of the design. ok, so example #3 says brown, gray, yellow. Hi Morgan,
If you look again at the graphic and then again and the worked example and use the table to follow the worked example with. Hi gents, I am a chartered mechanical engineer and don't often get involved with electronics. If the resistor has four coloured bands; three of the bands will be roughly an equal distance apart and relatively close together, the fourth will be slightly further away from the other bands. that should equal 18,000 ohms shouldn't it? Hello sir,concerning the last exercises under values to determine the first band ,second band and multiplier ,there's a mix-up with the answer,you wrote for 1m ohms you wrote brown black and green, instead of brown black and blue. Hi…I'm trying to replace a resistor in my drill charger, I've calculated it to be 3900Mohms. All … When comes to measure the value of resistor we can do that by several ways. Good news! A series circuit is a single loop, with no branching paths. Resistor tolerances, a worked example, the resistor preferred value system and some tasks for you to try are also included. var linktext = username + "@" + hostname ; These will be easily identifiable due to their single black band. Thanks. amzn_assoc_default_category = "All"; Series Circuit Identify a series circuit. i am really confused, we have a test tomorrow and i still dont understand how to calculate the value of a resistor or the tolerance value or the tolerance range. These are referred to as preferred values or E-series, and they are published in standard IEC 60063:1963. Calculate the required resistor value for a LED in an electronics project. Provide all of the resistance values in parallel, separated by a comma "," and click the "Calculate" button to determine total resistance. Now place the first two bands as the numeric value and third band as a multiplier (10 5).. Deviations in Resistor Color Coding What am I missing? Your chart quickly provides the value of any 4 band resistor….brilliant. Once you have the resistors you can measure their actual resistance and update your calculations, if necessary. Calculate the Forward Voltage for different LED‘s Circuits. The only difference is that with the significant numbers. Hi Kevin,