Digital multimeter is a test equipment which offers several electronic measurement task in one tool. This friction opposes the flow of electrons and thus reduces the voltage pressure placed on other electronic components b y restricting the amount of current that can pass through it. Test each pair of leads both ways six tests in total. Best easy way how to accurately test diodes, capacitors, bridge rectifiers in tv powersupply boards, how to use multimeter to test or read tv parts in pow. The surrounding components on a circuit board can greatly affect the reading. Digital multimeters typically have the ability to measure impedance, voltage, and current for electrical devices, from bus bars down to integrated chips. If you suspect that your circuit board has a bad transistor, you can test for a failure by using a multimeter.
It is a standard diagnostic tool for technicians in the. Analogue and digital multimeters have either a rotary selector switch or. If you are in the electronic repair line you would know that checking electronic components in electronic boards can take up lots. In this video, i have shown how to test all the basic electronics components like resistor, capacitor, diode, led, transistor, fuse with a multimeter. Most production facilities have some qa processcomponents go through before they leave the factory,but bad components do slip through. Using one to test your electronic components lets you determine if they need to be repaired or replaced. Set a digital multimeter to diode test and an analogue multimeter to a low resistance range such as. It is a type of multimeter which functions digitally. Just like with resistance testing, youll need to manually set the expected range and make. A handheld multimeter is low cost, easy to use and gives accurate readings. A digital multimeter incorporates a set of digits on the show associate degreed an analogue multimeter incorporates a scale with a pointer or needle.
Apr 04, 2016 checking voltage is the most basic way to troubleshoot a circuit you can look for bad connections, burnedout components, or a dead battery. Note the different length terminals on one of the capacitors. You really want each varieties to hide the quantity of. Aug 30, 2018 there are many electronic components like resistors, capacitors, leds, transistors, etc. You have remained in right site to start getting this info. In this tutorial, you can get a brief overview of few of the most common basic electronic components. The small capacitors usually used in electronics are often measured in microfarads and nanofarads.
So if youve measuring a 12v battery, use the 20v setting. Getting the most from your multimeter american radio history. Most ee components and elements used in electrical and electronics. Basic electronic components such as resistors, capacitors, diodes and transistors are widely used in any electronic devices and gadgets. How to test a diode with a multimeter electronics post. There are many electronic components like resistors, capacitors, leds, transistors, etc. Checking voltage can be very dangerous, be sure to get the proper training before attempting. Easy way how to test capacitors, diodes, rectifiers on powersupply. The electronic multimeter is a device which is used for the measurement of various electrical and electronic quantities such as current, voltage, resistance etc. A multimeter is as basic to an electronic technician as a brush is to apainter. Electronic multimeters electronic circuits and diagrams. May 23, 2018 hi, i am sure all of my blog reader understand that in the field of mobile phone repairing multimeter is a very the important tool without a multimeter you will not be able to measure anything in the field of the cell phone repairing so come let we try and understand how we can use the digital multimeter to measure ac current and dc voltage and how we can check basic electronic components.
Knowing how to conduct a test on this components using a multimeter would give you an idea on how to trouble shoot and repair any defective cellphones or electronic equipments at home. Use a multimeter on these test points to see if the voltage measured matches the labeled test point voltage. To check if the resistor is in good condition or broken, we use a multimeter. Jul 08, 2019 though mosfets usually require sophisticated equipment for checking their conditions, a simple way using a multimeter is also considered effective most of the time for checking them.
How to perform a continuity test for electric components with. How to test electronic components linkedin slideshare. As a result the multimeter prices vary according to what is. This pool of electrons is available for electronic components to use. Simple secrets to speed up on how to test electronic componentspart i. Dec 08, 2010 basic electronic components such as resistors, capacitors, diodes and transistors are widely used in any electronic devices and gadgets. This friction opposes the flow of electrons and thus reduces the voltage pressure placed on other electronic components b y.
So if youre thinking about learning how to test electronic components with a multimeter and perform electronic repair, one that you can learn from the convenience of your own home, and youre looking to spend as little as possible to get started, i believe i can help you on this. To read the rest of the chapter of testing electronic components. Checking voltage is the most basic way to troubleshoot a circuit you can look for bad connections, burnedout components, or a dead battery. Monday, may 04, 2020 dear friend, m y name is jestine yong and im a professional. Even if you dont have an electrical schematic of the circuit board, which would identify components and give you the voltage and resistor values that should be present, many circuit boards have test points. All the testing methods below uses a multimeter and hence its how to test fets especially the jfet and mosfet using a multimeter. Nov 27, 2018 how to test a diode with a multimeter. As this is complete multimeter tutorial for testing all basic electronics components you can click on the following time stamps to skip. They may also be able to measure frequency and duty cycle a measurement relating. I took my first electronics repair course back in the year 1987. How to use a multimeter on a circuit board our pastimes. The multimeter name is given to it to define its relevance for measuring multiple quantities. Bookmark file pdf testing electronic components with multimeter testing electronic components with multimeter recognizing the artifice ways to acquire this book testing electronic components with multimeter is additionally useful.
Write it down in your book what are the results that you get whencomparing and checking a good and a bad zener diode. The most basic things we measure are voltage and current. Some components can be electrically ok, but a voltage check can ensure it is mechanically ok. M y name is jestine yong and im a professional electronics repairer and an instructor. Often circuits like transistor radios fail after they have been used for many years, and it is useful to be able to mend them also when constructing equipment, circuits do not always work first time and it is necessary to faultfind. It is also known as the voltmeter or ohm meter or volt ohm meter. Remove and solder electronic components from and onto pcb board. Components are attached to a printed circuit board. How to test electric components with a multimeter freds. Digital multimeters dmm are a common measurement tool to test or troubleshoot a wide range of electrical issues. If you need to find out whether electronic components or circuits work, you can easily test them in your home with a multimeter. If you are in the electronic repair line you would know that checking electronic components in electronic boards can take up lots of your time especially if you do not know the short cut way to test it.
How to test all electronic components with multimeter. Now why did we set the multimeter to the 20v dc setting. Jul 03, 2018 as this is complete multimeter tutorial for testing all basic electronics components you can click on the following time stamps to skip any portion of the video. Often circuits like transistor radios fail after they have been used for many years, and it is useful to be. Diodes are one of the components that can be tested very easily. Feb 25, 2012 start measuring zener diode takenout from your components rack or from scraped electronic board,compare a good zener diode and a shorted one and see for yourself. I often pick up the meter quickly and without checking. Throughhole soldering is needed to connect components to the board. If you continue browsing the site, you agree to the use of cookies on this website. A basic multimeter measures resistance, voltage and current. Digital multimeter stepbystep guide mobile repairing online. Digital multimeters are available at mouser electronics from industry leading manufacturers. Electronic multimeters it is one of the most versatile general purpose instruments capable of measuring dc and ac voltages as well as current and resistances.
A good diode will show a low voltage drop across its junction 0. Identify and measure most of the basic electronic components so that you can start to troubleshoot any type of electronics equipment. Resistors a twoterminal passive component that opposes the flow of current reduces the electric current and at the same time lowers the voltage levels in a circuit. You really want each varieties to hide the quantity of tests required for coming up with and repairwork. Three primary electronic components are used in circuits. Nov 21, 2017 checking voltage can be very dangerous, be sure to get the proper training before attempting. Digital multimeter working principle analyse a meter. How to use a multimeter learn at sparkfun electronics. A digital multimeter or dmm is test equipment used for resistance, voltage, current measurement and other electrical parameters as per requirement and displaying the results in. This compilation is not intended as a complete survey of the field of electrical and electronic equipment testing. Before going for the assembly of the basic electronic components in any particular circuit, it is always advisable to test the components about their working condition or functioning, to avoid the undesired outcome.
A threerange milliammeter, a threerange voltmeter with a sensitivity of 2,000 ohms per volt, and a tworange ohmmeter are combined in this circuit. A digital multimeter is a test tool used to measure two or more electrical valuesprincipally voltage volts, current amps and resistance ohms. Ordinary diodes as wells as zener diodes can be checked by using a multimeter. We take the example of two types of nchannel mosfets, the k1058 and the irfp240 and see how these mosfets can be tested using an ordinary digital multimeter. A multimeter is an ideal piece of test equipment to help with fault finding an electronics transistor circuit. The first describes the testing of various electronic components, assemblies, and systems. Every fixer should know their way around a multimeter, which has just north of a zillion uses for testing electronic components and circuits. Pass it through the meter cautiously, as too much current will blow the internal fuse. This tutorial will show you how to use a digital multimeter dmm, an indispensable tool that you can use to diagnose circuits, learn about other peoples electronic designs, and even test a battery. The resistor is an electronic component that has electrical friction. Follow along to master the three most basic functions of a multimeter. Testing electronic components, assemblies and systems page. How to check a mosfet using a digital multimeter homemade.
A short guide to testing electronic components gokimco. Electrical components unit 36 objectives after completing this unit, you will be able to. How to diagnose a circuit board with a bad transistor sciencing. It is a standard diagnostic tool for technicians in the electricalelectronic industries. Most ee components and elements used in electrical and electronics equipments, devices and instruments are common in their functions and operations. Now connect both ends of resistor with the avo or digital multimeter terminals. Use an analogdigital multimeter to measure voltage, current and resistance for troubleshooting purposes. Diodes are one of the components that can be tested very.
Since voltage, current and resistance are related through ohms law, resistors are a good way to control. A digital multimeter has a set of digits on the display and an analogue. Learn to use a multimeter to test voltage, resistance, and continuity. How to test electronic components with a multimeter our. Testing semiconductors without disconnecting them from circuit. How to check basic electronic components using a multi. A digital multimeter or dmm is test equipment used for resistance, voltage, current measurement and other electrical parameters as per requirement and displaying the results in the mathematical digits form on an lcd or led readout.
For this purpose, take avo meter or digital multimeter and select resistance in avo meterrotate the knob to the. If youre not happy with what you discover from testing electronic components, just send me an email and tell me the reason and ill send you a complete refund of every cent. Holes go all the way through the board from one side to the other. How to perform a continuity test for electric components. More advanced models can measure capacitance, inductance, and temperature. We all know the rule and importance of troubleshooting in electrical and electronics engineering. Figure 1 low resistance pipe high resistance pipe rough walls low pressure high. A multimeter is a handheld device that combines different electronic testing and measurement tools. Even if you dont have an electrical schematic of the circuit board, which would identify components and give you the voltage and resistor values that should be present, many circuit boards have test points that are clearly labeled. The capacitor stores energy in an electrical field, the inductor stores energy in a magnetic field, and a resistor increases the. Digital multimeters are widely accepted worldwide as they have better accuracy. Feb 26, 2015 how to test electronic components slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Because electronic circuits can cease to function if any one of their various components fail, circuit board troubleshooting can be a delicate and timeconsuming process. How to test all electronic components with multimeter resistor.
Few things hurt your ego more than spendingan afternoon fighting your code,only to realize hours laterthat a bad component was causing all of your problems. Testing components electronic circuits and diagrams. Resistors a resistor impedes the flow of electricity through a circuit. Learn how to use multimeter to test electronic components and perform electronic repair like a professional right now. How to diagnose a circuit board with a bad transistor.
Just like with resistance testing, youll need to manually set the expected range and make sure both the multimeter can handle the maximum expected voltage. As this is complete multimeter tutorial for testing all basic electronics components you can click on the following time stamps to skip any portion of the video. The post explains how to test mosfets using multimeter through a set of steps, which will show help you to accurately learn the good or faulty condition of a mosfet. If you want to be a successful electronic repairer then please pay attention to what i am about to tell you. How to check basic electronic components using a multimeter. You have to set the multimeter to a range that it can measure. Multimeter test meters come in a variety of shapes sizes and they have differing degrees of functionality and performance. Basic electrical and electronic components passive devices devices or components which do not require external source to their operation. The baseemitter be junction should behave like a diode and conduct one way only.
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