Single linear slider potentiometer, for audio applications also known as a fader. Powerpoint to pdf convert your ppt to pdf for free online. Potentiometer free download as powerpoint presentation. Originally developed by forethought, who microsoft bought out, ppt is the worlds most popular presentation file format. Potentiometer working, their applications and different types.
Positional sensors linear variable differential transformers lvdts the linear variable differential transformer lvdt is an accurate and reliable method for measuring linear distance. Convert ppt to pdf online and free this page also contains information on the ppt and pdf file extensions for windows and mac. To adjust the output voltage the sliding contact gets moved along the resistor on the output side. Dc cromptons potentiometer or laboratory type potentiometer. For single channel control or measurement of distance.
It is often used for trimming and scaling analog signals by microcontrollers. In coordinate ac potentiometer, two separate potentiometers are caged in one circuit as shown in the figure. To measure the emf of an unknown cell using a potentiometer. Potentiometers slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The principle involved in the potentiometry is when the pair of electrodes is placed in the sample solution it shows the potential difference by the addition of the titrant or by the change in the concentration of the ions. Dc potentiometer, crompton potentiometer, construction, standardization, application. Ppt potentiometric titrations powerpoint presentation. It is either built using an r2r integrated circuit or a digitaltoanalog converter. Potentiometric titrations potentiometric titrations involves the measurement of the potential of a suitable indicator electrode with respect to a reference electrode as a function of titrant volume. Drag and drop or click upload file to import your ppt.
Measurements using comparison methods are capable of a high degree of accuracy because the result obtained does not depend. If a sensitive indicating instrument is used, very little current is drawn from the source of the unknown voltage. Definition, types, and working principle electrical4u. Since a potentiometer measures voltage, it can also be used to determine current simply by measuring the voltage drop produced by the unknown current piling through a known standard resistance. Secondary methods are so constructed that the desired quantity is measured only by observing the. Slide wire potentiometer, battery or power supply, rheostat, double poledouble throw dpdt switch, standard cell, unknown cell, galvanometer, key switch and a multimeter. Since these potentiometers work on the principle of resistance, they are also called as the resistive potentiometers. The working principle of potentiometers is based on the figure shown below, which shows the circuit diagram of the basic slide wire potentiometer. This pancake interface, combined with its small size. A potentiometer also known as a pot or potmeter is defined as a 3 terminal variable resistor in which the resistance is manually varied to. The potentiometer is also called as pots and it one of the most commonly used devise for measuring the displacement of the body. The voltage in and ground portions are just there to establish which way the electrical current is heading, there can be any number of.
It is a very powerful tool that you can use to create presentations that include pictures. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. A potentiometer is a variable resistor consists usually of a turning dial to change the value of its resistance between two of its terminals. Dc motor speed control using arduino and potentiometer. Potentiometers also known as pot, are nothing but variable resistors. If you continue browsing the site, you agree to the use of cookies on this website. The potentiometer used for measuring the phase and the magnitude of the unknown emf by comparing it with the known emf such type of potentiometer is known as the ac potentiometer. Electronics basics how a potentiometer works random. To compare the emfs of two given primary cells using a potentiometer. State electronics 36 state route 10, ste 6 east hanover, n 079360436 9738872550 toll free 18006318083 fax 9738871940 potentiometers.
A potentiometer made from homogenous resistance wire of length l and resistance r l al is used to changed voltage at an appliance of resistance r find the voltage across and current through a resistor r as a function of the distance x of the sliding contact from the end of the potentiometer. Dc motor is the most used motor in robotics and electronics projects. A potentiometer also referred to as pot may come in a wide variety of shapes and are used in many applications in your daily life, for example to control the audio volume of the radio. Thus, this is all about types of potentiometer, its construction, and its applications. The resistance, r, provides the required reduction in. It can also use as a variable resistor in most of the applications.
The emf of a cell may be defined as the terminal voltage of the cell when not under load, that is. Potentiometric titrations provide more reliable data than data from titrations that. Winner of the standing ovation award for best powerpoint templates from presentations magazine. A potentiometer has the two terminals of the input source fixed to the end of the resistor. Since the reference voltage can be produced from an accurately calibrated voltage divider, a potentiometer can provide high precision. Galvanometer, rayleighs current balance and potentiometers. The first one is named as the inphase potentiometer which is used to measure the inphase factor of an unknown e.
They can provide a variable resistance by simply varying the knob on top of its head. In this project we will be able to control the speed of dc motor with potentiometer and we can adjust the speed by rotating the knob of potentiometer. This is different to a rheostat, where here one end is fixed and the sliding terminal is connected to the circuit. A very common misconception students have about potentiometers is the relationship between resistance and direction of wiper motion. The potential is directly proportional to the concentration of the ions.
Acps potentiometers can be adjusted from either side, both in the. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Since clarosystem and mod pot potentiometers are modular in construction, we can produce prototype quantities of 12 or 58 inch square, conductive plastic, cermet, or hot molded carbon pots for you in just a few hours. Introduction a potentiometer is an instrument designed to measure an unknown voltage by comparing it with a known voltage. Types of resistors the two main characteristics of a resistor are its resistance, r, in ohms and its power rating, p, in watts. The rotary potentiometer c0104 is provided with a bearingless design. High quality faders are often constructed from conductive plastic. The terminal voltage of a cell is the potential difference between its terminals. For example, a dc cromptons potentiometer is designed to measure voltages up to 1. Potentiometry is mainly used to determine the potential or the electromotive force of a sample solution. Convert powerpoint to pdf make ppt and pptx slideshows easy to view by converting them to pdf.
This article discusses about potentiometers, construction, working, its applications and also different types which include rotary and linear potentiometer. Information about the components and usage of arduino hardware. Community documentation tutorials created by the arduino community. Determine the value of the resistance r3of the potentiometer using your ohmmeter. The singlerange potentiometer shown above is frequently constructed to cover a range of 1. The potentiometer is extensively used for a calibration of voltmeters and ammeters and has, in fact. Usages cw cw r2 r210k 10k voltage sampling ccw ccw. A potentiometer is an instrument for measuring voltage or potential difference by comparison of an unknown voltage with a known reference voltage. Wait for smallpdf to convert the file to pdf format. The potential difference is determined by the electrochemical cell which is composed of pair of electrodes namely the indicator electrode and the reference electrode. And also it is used to compare emfs of different cells. One is their resistance rohms itself and the other is its power pwatts. For instance, it is common to hear a student say something like this, turning the potentiometer so the wiper moves up will increase the resistance of the potentiometer. Department of eee svecw page 4 output of the instrument, which needs to be calibrated.
The working principle of the ac potentiometer is same as that of the dc potentiometer, i. Thumbwheels and shafts can be provided either separately or already inserted in the potentiometer. General equations for bridge balance, measurement of self inductance by maxwells. A pot is a manually adjustable variable resistor with three terminals. Potentiometers where the wiper moves along a linear path. Conductive plastic potentiometer voltage divider, resistors ruler was. A digital potentiometer is a digitallycontrolled electronic component that mimics the analog functions of a potentiometer.
Attach the ammeter and adjust the potentiometer until the ammeter reads zero current. For example, the shaft rotation might represent an angle, and the voltage division ratio can be made proportional to the cosine of the angle. For controlling the speed of dc motor we have various methods, but in this project we are controlling dc motor speed using pwm. Potentiometer motor control wiring diagram abroad study. The potentiometers or the pots, as it is commonly known in the electric circles, is a three terminal variable resistor. It consists of a long wire of uniform crosssectional area and of 10 m. The potentiometer is an electric instrument that used to measure the emf electro motive force of a given cell, the internal resistance of a cell. The resistance of the wire is directly proportional to the length of the wire, thus as.
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