The variable resistor offers a true adjustable value of resistance, between the a terminal and the wiper, or the b terminal and the wiper. A variable resistor s role in a circuit is to allow the amount of resistance to be changed. This is the most common type of low wattage resistor. They are also available in single and dual gang types and is also available in different travel lengths. However, no responsibility is assumed by analog devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. The individual variable resistor pins are labeled ax, bx and wx, ie. A potentiometer is a mechanical type of variable resistor. There are different types of variable resistors that can be used for different functions and environments. A question on using potentiometer as a variable resistor. Ws series high surge withstand wirewound resistor rohs directive 200295ec jan. In other words, a resistor installs electrical resistance into an electronic circuit.
Floating either terminal a or b allows the devi ce to be used as a rheostat variable resistor. Additionally, all three resistors have a highimpedance setting. Variable resistors are mostly used when the user do not know what exact resistance value does he want. A highvoltage variable resistor such as a focus pack is an example. Now we dont want our resistor to be on the plain boundary of the maximum wattage rating, so get like a 4k. The cfr series carbon film resistors are manufactured by coating a homogeneous film of pure carbon on high grade ceramic rods. Potentiometers also known as pot, are nothing but variable resistors. Types of resistors resistors come in a variety of shapes and sizes. Product index potentiometers, variable resistors adjustable power resistor. Phase control discrete 73 fast discrete 15 ic power and linear. There are switch mechanism variable resistors with an annular crosssection which are used for the control of equipments. Resistor datasheet, resistor pdf, resistor data sheet, datasheet, data sheet, pdf. Metal oxide power resistorsrohs compliant morc series. Upon powerup, the wiper assumes a midscale position and.
C information furnished by analog devices is believed to be accurate and reliable. The nominal resistance and tolerance are marked on the resistor using four or five colored bands in accordance with iec 60062, marking codes for resistors and capacitors. Cisco nexus 5596up switch configured with three 16port expansion modules. Get same day shipping, find new products every month, and feel confident with our low price guarantee. In rheostat, one end of resistive track of a variable resistor and its wiper terminal are connected to the circuit. Even more, components are added to this type of a variable resistor so as to make them compatible with complicated electronic circuits.
Potentiometers, variable resistors 403 new products. Each of the resistors has two setting registers, which are selectable by software or by pin configuration. When only two terminals are used, it functions as a variable resistance and is called a rheostat. Please check microchip web site for device release and availability. This is the signal that can be used for a very wide variety of applications including an amplifier gain control, measurement of the distance or angles, tuning of the. Current through a resistor is directly proportional to the voltage applied across the resistor. They can provide a variable resistance by simply varying the knob. Data sheet carbon film leaded resistor rs series features the most economic industrial investment standard tolerance. In this lesson you will learn about variable resistors. Each device performs the same function as a discrete potentiometer or variable resistor and has 256 tap points.
Bulk metal foil technology, 16 pin transistor outline hermetic resistor network. Variable resistor working, specification, types, applications. This is due to the fact that resistors can be joined together with other components to form filters for a desired levels. Pin 17 delivers the mpx, resistor from pin 6 to ground the signalstrength characteristic can be shifted parallel, and with an additional resistor between pin 6 and pin 7 the. Types of resistors potentiometer, varistor, rheostat. The wiper settings are controlled through an i2ccompatible digital interface. Triple, 8bit nv variable resistor with dual settings and. R12 2 100 1% resistors 0402 r14 1 50k variable resistor bourns. Potentiometers, variable resistors electronic components. By turning a knob or screw, the resistance of a potentiometer is changed. Another resistor r3 limits the current through an led.
Logarithmic or linear the resistance element in a potentiometer may not produce a linear change in resistance across its range of travel. Dual, 256position, i ccompatible digital potentiometers. Potentiometers are used in circuits, when it is necessary to alter the resistance. Jameco sells variable resistor 5k and more with a lifetime guarantee and same day shipping. Operationally, this device consists of fixed resistors and digitally controlled variable resistors that provide differential gains of 1, 2, 4, and 8 see functional diagram.
As the name implies, the resistance of the variable resistor is changeable. Tech notes variable resistors looked more technical to the user. This is what a jfet characteristic looks like in the positive vds and id quadrant. As the name suggests, the resistance of a variable resistor can change. They are basically of 2 types 1 fixed resistor and 2 variable resistors. R is a physical signal input port that controls the resistance value.
Dallas, alldatasheet, datasheet, datasheet search site for electronic components and semiconductors, integrated circuits, diodes, triacs, and other semiconductors. A variable resistor is in essence an electromechanical transducer and normally works by sliding a contact wiper over a resistive element. The variable resistor is a very important component that is found in many electrical for such things as tone and bass controls as well as volume. The selected register determines the value of the variable resistor. Linear variable resistor in electrical systems matlab. Adjustable power resistor potentiometers, variable. They might be a standard, static resistor, a pack of resistors, or a special variable resistor.
For example, in this tutorial we will be using each variable resistor as a voltage divider by pulling one side pin pin b high, pulling another side pin pin a low and taking the variable voltage output of the center pin wiper. Standard solderplated copper lead applications automotive telecommunication medical. The ds3901 is a triple, 8bit nonvolatile nv variable resistor. Packaging type code quantity packaging style width pitch dimensions sfr16s a5 5000 taped acc. It is easy to vary or change the resistance of a variable resistor to a desired value. Cisco nexus 5548p, 5548up, 5596up, and 5596t switches data. Between 0v and the pinchoff voltage is where we are interested. Darklight and temperature sensors usually have these components, as the potentiometer variable resistor allows the circuit to be made more or less sensitive they can be turned up or down reducing or increasing resistance. The max5426 is a precision resistor network with low temperature drift and high accuracy that performs the same function as a precision resistor array and cmos switches.
Variable resistors are in stock with sameday shipping at mouser electronics from industry leading manufacturers. A wide variety of variable resistor 10k ohm options are available to you, such as other, trimming potentiometer, and rotary potentiometer. When resistance decreases the flow of the current increases. Accessories 7 items adjustable power resistor 1246 items rotary potentiometers, rheostats 9173 items scale dials 82 items slide potentiometers 837 items. Resistors and types of resistors fixed and variable resistors. The switch has 48 unified ports and three expansion slots. Complete technical details can be found at the datasheet given at the end of this page. Carbon film fixed resistorsrohs compliant cfrc series. The wiper settings are controllable through the i 2. The cisco nexus 5596up switch figure 3 is a 2ru 10 gigabit ethernet, fibre channel, and fcoe switch offering up to 1920 gbps of throughput and up to 96 ports. The process of limiting or restricting the electric current to a certain.
Variable resistor datasheet, variable resistor pdf, variable resistor data sheet, datasheet, data sheet, pdf. The chip select cs, count clk and ud direction control inputs set the variable. When a variable resistor is used as a potential divider by using 3 terminals it is called a potentiometer. Smart load switches 21 microbuck voltage regulator 17 microbrick dcdc regulator module 1 vrpower drmos power stage 31 analog switches and multiplexers 80 mosfets, automotive 347.
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