Resistance and resistors introduction teaching resources. Calculating the correct size of braking resistors dbrs. Resistors are the most fundamental and commonly used component in all the electronic circuits. Current electricity ppt free download as powerpoint presentation. Resistor color bands is a free application designed to be a simple tool that displays resistor color codes and values. Power in an ideal world you calculate the mechanical energy involved in each stop, using one. Updated explain the different types of resistors pdf. Inverter not only adjusts the speed but also adjusts the voltage to the motor. Stern writes i work in a computer lab with a physical computing studio, and recently i cleaned out the component closet. When modeled on a schematic, a resistor will show up as one of these two symbols. Resistors are available with ratings from as low as 18 watt to hundreds of watts. Resistor color coder ppt software free download resistor. If you continue browsing the site, you agree to the use of cookies on this website.
Figure 2 shows the same circuit as analyzed above when q1 is on and pg is low. If there is no tolerance band, then find the side that has. With our easytouse powerpoint to pdf converter, you can quickly convert your powerpoint presentations to pdf format while preserving the precise formatting and layout of your slides. Resistor color bands can be used as a learning tool for students studying in electronics. Winner of the standing ovation award for best powerpoint templates from presentations magazine.
We have seen that when converting from a delta network to an equivalent star network that the resistor connected to one terminal is the product of the two delta resistances connected to the same terminal, for example resistor p is the product of resistors a and b connected to terminal 1. Conversion calculator parallel and series resistor digikey. Relation between analog signal and digital equivalent n a i re i f i1 v b 2. The first two are usually combined into one variable, the power of the resistor. Resistors operate on the principle that energy can be neither created or destroyed, only changed from one state to another. Our online pdf to powerpoint converter is the best available, and you can use it free. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Kitronik ltd how to calculate and understand resistor values resistors a resistor is a device that opposes the flow of electrical current. It is a very powerful tool that you can use to create presentations that include pictures. The main function of a resistor within an electrical or electronic circuit is to oppose or resist the flow of current, hence named as resistor. In other words, the subsequent chip would not recognize the pg voltage as being a logic high. For example if r 2 is double the value of r 1 there will be twice the voltage across r 2 than across r 1. With a pullup resistor, the input pin will read a high state when the button is not pressed.
Powerpoint, with videos explaining what is resistance and how to combine resistor values. Our free pdf converter is the best solution for converting powerpoint to pdf files. Optical character recognition converts nonselectable text from scanned documents into editable office files. There is no time limit if you become a hipdf user right now. The output powerpoint presentation will retain its original formatting, for you to revise and edit. The speed of the ac induction motor is adjusted by the frequency variation of the ac power to the motor. Doc xls ppt to pdf converter 3000 is created as an easytouse and flexible converter which is designed to free batch convert word, excel, powerpoint to pdf with preserving the original text, graphics, images, layout etc. In the next tutorial about resistors, we will look at the different ways of identifying the resistive value of the. Ad conversion va bi encoder ex transducer interface.
Without resistors we would be unable to build electrical circuits. Wirewound resistor types are prefixed with a wh or w notation eg wh10. Power rating depends on the resistors construction. To specify the resistor we need to know three things. In general, we use an ac supply of 230v 50hz, but this power has to be changed into the required form with required values or voltage range for providing power supply to different. Powerpoint to pdf convert your ppt to pdf for free online. When the temperature of the thermistor is low, its. Convert your powerpoint to pdf online, easily and free. Even the battery has parts that offer resistance to the flow of electrons. Wirewound resistors however, do not not have the close tolerance of composition or film types. An electronic device, often an integrated circuit, that converts a digital number into a corresponding analog voltage or current. Chartstemplate provides a large number of free and handpicked feelings chart, which can be used for small, medium and largesized enterprises.
Resistors there is always some resistance in every circuit. Convert powerpoint to pdf make ppt and pptx slideshows easy to view by converting them to pdf. Ppt resistors powerpoint presentation free to download. Resistor color code system how to read the resistor code. The numbering of the resistor increases sequentially as you place each resistor. The only circuits that come near to zero resistance are superconductors.
Resistors and resistance how they all add up slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. This tool calculates the overall resistance value for multiple resistances connected either in series or in parallel. Explain how the following opamp circuit is able to convert the phototubes weak current signal into a strong voltage signal, without imposing any signi. All resistors generate heat as a product of their function. Choosing an appropriate pulluppulldown resistor for. In this article, we discuss about how to convert current to voltage using resistor with different examples like 020 ma to 010 vdc conversion, 420 ma to 210 vdc conversion, 020 ma to 05 vdc conversion convert current to voltage. Usually, the spindle diameter of a variable resistor is 6mm. Power rating of resistors in addition to having the required ohms value, a resistor should have a wattage rating high enough to dissipate the power produced by the current without becoming too hot. A free powerpoint ppt presentation displayed as a flash slide show on id. An inverter is nothing but a motor control which is used in adjusting the speed of an ac induction motor.
Sweeping a variable resistor virginia tech 1769 ppt presentation summary. Ohms law current, voltage and resistance ppt web4study. Resistors variable resistors are called potentiometers there is a fixed value of resistance between two terminals the moving part of the potentiometer is called the wiper resistors four band resistor colour code 1st band provides the first digit of the code 2nd band provides the second digit of the code 3rd band is the multiplier 4th band. This value is a maximum because choosing a larger resistor would result in a larger voltage drop across rpullup which would cause vpg to be lower than the minimum value of vih. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. Each component has a volt drop across it and is the force required to convert the electrical energy to some other form. If the power rating of a resistor is too low for a par ticular. The small resistance produces a voltage drop of ir 1. Various parameters like size, type of track and also resistance is used to define a variable resistance. Smallpdf will upload and start to work on the file right away. C the current in each resistor can be calculated from the volt drop across the resistor. Convertio advanced online tool that solving any problems with any files.
Our easytouse pdf to ppt converter converts your pdf to a powerpoint presentation in seconds, while retaining all the original formatting so you can easily edit and make changes to your ppt. Best way to convert your pdf to ppt file in seconds. In the case of the resistor, voltage is reduced by converting electrical energy into heat or thermal energy. It is extremely simple to measure 020 ma signal with a device that will measure only voltage inputs. Star delta transformation is simply the reverse of above. It occurred to me that the reason we had a build up of unlabled resistors was because noone knew how to read them without the resistulator widget or a resistance calculator website, so i made a sign to tack into the cabinet itself for offline calculation. Convert ppt to pdf online and free this page also contains information on the ppt and pdf file extensions for windows and mac. If the variable resistor has a straight track it is defined in the component by the short form lin representing a linear track. The bigger the value of a resistor the more it opposes the current flow. These charts will be a great study guide to help you master the resistor inside and out, backwards and forwards. This free online pdf to ppt converter allows you to easily convert a pdf file to a fully editable document in microsoft powerpoint ppt and pptx format.
If there is only one black band in the center, the resistor is called a zero ohm resistor. This resistance that is from the parts of the circuit itself especially. Convert pdf to powerpoint convert your pdfs to powerpoint. Generally, if an additional fifth band is black, the resistor is a wirewound resistor. A circuit is always made up of some wire, so there will be some resistance there. A wirewound resistor can have a smaller physical size for a given power rating than carbon composition or film resistors, compare this 5w resistor with the 1w resistor at labelled 3 in fig. Steps to convert the 230v ac to 5v dc using step down converter every electrical and electronic device that we use in our daytoday life will require a power supply. Drag and drop or click upload file to import your ppt. Resistor is defined as an electrical component which is used for controlling temperature and voltage.
Digital to analog converter georgia institute of technology. Capacitor, resistor, and ohms law 394826 ppt presentation summary. Thermistors a thermistor is another special type of resistor. Wait for smallpdf to convert the file to pdf format. Just click the video when the ppt in in fullscreen. If the voltage input module available will accept a 010. Steps to convert the 230v to 5v dc to powerup the circuits. On the result page, proceed to modify the file further if needed. Star delta transformation and delta star transformation. Follow these steps when choosing a resistor for a circuit. Originally developed by forethought, who microsoft bought out, ppt is the worlds most popular presentation file format. Use our online service to convert pdf to ppt in a heartbeat.
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