sourcingmap 20 x 1/2W Watt 100K ohm 100KR Carbon Film Resistor 0.5W

Product Information

The coding is defined in the international standard IEC 60062:2016. It describes the coding standard for both resistors and capacitors. Reading Color Codes

Resistors manufactured for military use, may include an additional band indicating the failure rate. Other Resources Since the context usually makes it clear that we're talking about resistor values, it's common short-hand to drop the 'Ω' so that, for example, you can write "39K"* instead of "39KΩ".

Exceptions

Identify the last band first. The last band is usually gold or silver and should be separated from the other bands by a small gap. This band gives us the tolerance of the resistor. Color-coding is a method used to indicate the resistive value, tolerance, and temperature coefficient of resistors with low wattage rating because of their small size. Color bands are used because they can be easily and cheaply printed on a small electronic component. Color-coding is also used for capacitors, inductors and diodes. Resistors are electronic components which have a specific, never-changing electrical resistance. The resistor's resistance limits the flow of electrons through a circuit. In my new concept I integrated the pulldown resistor as beeing part of the left side of the resistors.

The electrical resistance of a resistor is measured in ohms. The symbol for an ohm is the greek capital-omega: Ω. The (somewhat roundabout) definition of 1Ω is the resistance between two points where 1 volt (1V) of applied potential energy will push 1 ampere (1A) of current. Other through-hole resistors might be wirewound or made of super-thin metallic foil. These resistors are usually more expensive, higher-end components specifically chosen for their unique characteristics like a higher power-rating, or maximum temperature range. It was a hell of a job to find the right values to reach a wide range of values, fairly equaly spread. How do you tell which band is first and last? The last, tolerance band is often clearly separated from the value bands, and usually it'll either be silver or gold. Five and Six Band Resistors In a typical four-band resistor, the first and second bands represent significant figures. For this example, refer to the figure above with a green, red, blue, and gold band. Using the table provided below, the green band represents the number 5, and the red band is 2.

Termination and Mounting

So it was decided that "R" would represent a "x1" multiplier. So now you can write "39R" instead of "39Ω". I wrote a little code in excel, to whatch the effect of changing the value(s) of the resistor(s), which of course had to be within the common E12 range. In a five band resistor, the first four bands tell us the nominal value of the resistor, and the fifth band identifies the tolerance. Six band resistors also have a band that identifies the temperature coefficient (i.e. how sensitive the resistor is to temperature changes).

To calculate the minimum and maximum resistance values, we multiply the resistance value by the tolerance percentage to come up with the following values: Peek inside the guts of a few carbon-film resistors. Resistance values from top to bottom: 27Ω, 330Ω and a 3.3MΩ. Inside the resistor, a carbon film is wrapped around an insulator. More wraps means a higher resistance. Pretty neat! Let's take for example a four-band resistor with the following band colors: Violet Green Yellow GoldAs SI units go, larger or smaller values of ohms can be matched with a prefix like kilo-, mega-, or giga-, to make large values easier to read. It's very common to see resistors in the kilohm (kΩ) and megaohm (MΩ) range (much less common to see miliohm (mΩ) resistors). For example, a 4,700Ω resistor is equivalent to a 4.7kΩ resistor, and a 5,600,000Ω resistor can be written as 5,600kΩ or (more commonly as) 5.6MΩ. Schematic symbol

We then multiply that number by the multiplier indicated with the 3 rd band (yellow) which has the value of; x10 4 = 10000. Band Three – Multiplier: Takes the digits and multiplies them by a value given by this band. The actual multiplier is 10 n, where n is a value that corresponds to the color of the band. In this case, the third band is yellow which corresponds to the number 5. Therefore the multiplier is 10 5 = 10,0000. I was just wondering if a 100K resistor as a pulldown resistor might conflict with internal eletronics, resulting in not pulling the port low all the way. For example, if you want to calculate the value of a resistor that will allow a current of 1 ampere to flow through it when a voltage of 100 volts is applied across it, you would use the following formula: Six band resistors are exactly like five band resistors except they have an extra band to indicate the temperature coefficient, i.e. how much the resistance will change with temperature.

Specifications:

The color coding for resistors is an international standard that is defined in IEC 60062. The resistor color code shown in the table below involves various colors that represent significant figures, multiplier, tolerance, reliability, and temperature coefficient. Which of these the color refers to is dependent on the position of the color band on the resistor. In a typical four-band resistor, there is a spacing between the third and the fourth band to indicate how the resistor should be read (from left to right, with the lone band after the spacing being the right-most band). In the explanation below, a four-band resistor (the one specifically shown below) will be used. Other possible resistor variations will be described after. Resistor color codes consist of digits followed by a multiplier and a tolerance value. Four band resistors have two bands for digits, while five band resistors have three bands for digits. Six band resistors also add a temperature coefficient. Since it is a four-band resistor, the first two bands (violet and green) will indicate the significant digits which are, according to the table above; 75.