Understanding how to use a multimeter is important for everything from testing batteries and fuses, to diagnosing component and circuit failures. Choosing a multimeter a digital multimeter is the best choice for your first multimeter, even the cheapest will be suitable for testing simple projects and i recommend this one from rapid electronics. Its probably not new to you, but sometimes we want to analyze a powered circuit with a multimeter. Component inside them are different because analog multimeter shows output in continuous form while digital multimeter shows output in digital form. Learn in testing electronic components using multimeter. The most basic things we measure are voltage and current. Join rae hoyt for an indepth discussion in this video, testing components with a multimeter, part of learning arduino.
Use eye protection when experimenting on your own circuits. Some multimeters have a builtin transistor testing function, if yours does, you can skip this blog post simply insert your transistor into the socket on the multimeter and set the meter to the correct. Both ac and dc currents can be measured with a multimeter by connecting the meter in series with the circuit, in which current being measured provided the current in that circuit is limited or controlled by a load or appropriate values of resistance. Test the 3 before using it to make sure it is operating properly. This pool of electrons is available for electronic components to use. Most ee components and elements used in electrical and electronics equipments, devices and instruments are common in their functions and operations. The baseemitter be junction should behave like a diode and conduct one way only. Always use a power switch to remove power when building circuits. First steps in using a multimeter starting electronics. Again the test using a multimeter only provides a confidence check that the bipolar transistor has not blown, but it is still very. Familiarisation of electronic components and equipments 8 capacitors the capacitor, sometimes referred to as condenser, is a simple passive element that is used to store electricity. How to test automotive wiring with a multimeter it still runs.
Before we have a tendency to begin, fixing something could be a combination of ability, luck and sensible identification. Homemade continuity tester you can even make a continuity tester yourself at home using a 9v battery, resistor, buzzer or led and two wires. You need to spend on a multimeter that is worth it in the long run. 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. Jestine yong reserves the right to use the full force of the law in the. How to use a multimeter learn at sparkfun electronics. Do not discharge it by shorting out the terminals, as this can. This would be the same as shorting the component out with a piece of wire. Full text of testing electronic components by colin mitchell. To realize the most out of your device, ensure it comes with these very important aspects or essentials. How to take resistance measurements with a multimeter similarly to voltage measurements, we measure our resistance through the component we are testing. The multimeter combines a voltmeter, ammeter, and ohmmeter in one unit. To test the continuity of a wire, you just need to connect each probe to the wire tips. Unit 36 electrical components 567 this arrangement, an internal short circuit to the capacitor case will blow the system fuses without passing the current through the motor start winding.
Some multimeters have additional features such as transistor testing and ranges for measuring capacitance and frequency. A look at circuit board components resistors, capacitors, and diodes and. In this article, we have seen few basic electronic components and test equipment that we come across very frequently when designing or testing electronic circuits. This multimeter has a single dial setting for both the diode test and the continuity test. First of all i will show you the testing of resistors,capacitor,transistor npn. 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. Identification of basic electronic components their characteristics. Most of my trouble shooting and electronic testing involved voltage and resistance measurements. Diode test using a multimeter how to test a transistor with a multimeter. Testing components with a multimeter linkedin learning.
How to test electronic components using multimeter youtube. These are great cables for connecting to large wires or pins on a breadboard. Use mydaq digital multimeter dmm to test mysnap components if they appear to be damaged or not working. Our webiste has thousands of circuits, projects and other information you that will find interesting. When youre testing components, always start with continuity. Inspect the test leads before using to make sure there are no breaks or shorts.
Connect the general purpose pn junction diode to across the positive and. Test each pair of leads both ways six tests in total. Also consider getting a set of appropriate test clips for what youre working on so they are physically secure. How to diagnose a circuit board with a bad transistor. Some also have additional features like diode testing, continuity testing, transistor testing and capacitance testing. If you continue browsing the site, you agree to the use of cookies on this website. Passive devices devices or components which do not require external source to their operation. The diode test using an analogue multimeter can be extended to give a simple and straightforward confidence check for bipolar transistors. For this test, you can view the transistor as two diodes connected as shown in below figure for both npn and pnp transistors.
How to test electronic components slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. In this case, the diode tester is used and continuity is shown on the multimeter s display. Set a digital multimeter to diode test and an analogue multimeter to a low resistance range such as. A resistor is an electronic component that is used to resist the flow of current and cause a reduction in potential. Introduction to basic electronics, electronic components. Introduction to basic electronics learning about basic electronics and creating your own projects is a lot easier than you may think. Dec 02, 2015 how to test transistor with digital 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. A transistor, internally, is basically a component made up of different diode junctions.
Using a multimeter with an output value no higher than 0. How to use a multimeter beginners guide random nerd. In this digital meter to measure resistance range have been a total of 6. You can also troubleshoot your circuit to see where current is failing and pinpoint the problem. A test of circuitboard components, such as capacitors, resistors, transistors and integrated circuits, can be done to some extent without removing the components from the circuit board. Using component test on the fluke 867b graphical multimeters introduction the fluke 867b provides you with the unique ability to test electrical electronic components in an unpowered circuit. How to use a digital multimeter tutorial core electronics. Jul 29, 2019 a transistor is a semiconductor that allows current to flow through it under certain conditions, and cuts current off when other conditions are present. How to test electronic componets testing electronic components with dmm. Learn how to use multimeter to test electronic components and perform electronic repair like a professional right now. 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.
Learning schematics and testing components power board of a philips lcd monitor eadp43af a duration. Using a multimeter and testing wires commando car alarms. Electronic products like tvs, vcrs and computer equipment run on dc power. The power is generated by a 250 w loudspeaker horn positioned about 5 cm from the test circuit terminal board. 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. Let the cost not stand in the way to a quality model that will save you additional costs in the future. Probe types there are many different types of probes available for multimeters. The test meter or multimeter is one of the most flexible items of test equipment. The gmm supplies a sinewave of voltage to the component under test and then plots the voltage vs current relationship on the display. The thyristor pin assignment diagram of to220 package is given for ready reference. A digital multimeter can be used as a fast and simple way to check a transistor for open or shorted junctions. We all know the rule and importance of troubleshooting in electrical and electronics engineering.
Episode 54 basic component faultfinding with a multimeter duration. How to test electric components with a multimeter freds. Most production facilities have some qa processcomponents go through before they leave the factory,but bad components do slip through. How to test transistor using multimeter diy electrical projects. Dec 27, 2017 you are watching mhb channel01 on you tube. How to use a multimeter for electronic testing sportsmith blog. It can be used to measure ac and dc voltage, ac and dc current, and resistance by changing the settings and range of the multimeter. The small capacitors usually used in electronics are often measured in microfarads and nanofarads. Episode 54 basic component faultfinding with a multimeter some basic component testing with a multimeter. Testing electrical and electronics components and devices. Note the different length terminals on one of the capacitors.
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. Basic multimeters measures voltage, current and resistance, while more elaborate multimeters, such as the fluke 78, or fluke 88 have featues that can. The three components in an electrical system are electrical pressure, or voltage measured in volts, the amount of electricity flowing, or current measured in amps, and. How to carry out resistance tests on semiconductor devices. The small capacitors usually used in electronics are. Use mydaq digital multi meter dmm to test mysnap components if they appear to be damaged or not working properly.
Using component test on the fluke 867b graphical multimeters. Are there any best practices, dos and dont for using multimeters on circuits and components. Open the mydaq multimeter with the ni elvismx instrument launcher and set to ohms. A second multimeter is used to do the same stripboard test. Youve learned how to measure voltage, current and resistance, and how to check continuity.
You have to set the multimeter to a range that it can measure. All the testing methods below uses a multimeter and hence its how to test fets especially the jfet and mosfet using a multimeter. Learn how to use a multimeter to test a car battery or measure battery amps and battery voltage how to check battery with multimeter how to use a multimeter to test a car battery check battery voltage and battery amperage using a multimeter. For this purpose, take avo meter or digital multimeter and select resistance in avo meterrotate the knob to the. Before proceeding further it is good to refresh about basics of bjt. You can test a transistor with a multimeter that has a diode test function. In this video, i have shown how to test all the basic electronics components like resistor, capacitor, diode, led, transistor, fuse with a multimeter. Nov 30, 2016 multimeters can be used to help diagnose pretty much any part of your circuit. It combines the functions of a voltmeter, ammeter, and ohmmeter. A leading cause of failure in fitness equipment is insufficient power to the internal components of a machine or no power at all. Electronics club multimeters, digital, analogue, choosing. How to check basic electronic components using a multi meter basic electronic components such as resistors, capacitors, diodes and transistors are widely used in any electronic devices and gadgets.
How to perform a continuity test for electric components. Without using a dmm to immediately measure live voltage and currents, there is a risk of painful shocks that can even be lethal. A multimeter is an electronics testing device that, um, tests multiple things, including resistance, voltage, and current. If you suspect that your circuit board has a bad transistor, you can test for a failure by using a multimeter. How to test electronic components with a multimeter our. Test leads are great for connecting components together to test a circuit without the need for soldering. How to test scr using multimeter engineering tutorial.
In this beginners guide, weve shown you how to use a multimeter. Testing a transistor with a digital multimeter engineering. 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. Analog multimeter, measuring current steps in using your meter to measure current flow. Noise levels developed in the test specimen are meas ured across a shielded 100 kfi wirewound re. There are a lot more components like transformers, buttons, switches, connectors, etc. More comprehensive testing can be performed on these components when the component is removed. To read the rest of the chapter of testing electronic components. Basic electronics chapter 2, 3a test t5, t6 basic electrical principles and the functions of components figures in this course book are reproduced with the permission of the american radio relay league. The capacitor stores energy in an electrical field, the inductor stores energy in a magnetic field, and a resistor increases the. Ordinary diodes as wells as zener diodes can be checked by using a multimeter.
In this post let us discuss about how to test transistor using multimeter. A third multimeter which is a cheap one does not have an audible continuity tester. Dmms uses a more accurate and readable digital output than an analog solution. A multimeter is an essential tool in any electronics lab. Have someone check on you periodically if working alone. Transistors are commonly used as either a switch or a current amplifier. Testing electrical systems with a digital multimeter. Episode 54 basic component faultfinding with a multimeter. It consists of a low conductive component joined by conducting wires at both ends. Now im confused i was of the belief that testing voltages on a pcb when checking dc voltages you test to ground. Test meters or multimeters are used everywhere from home workshops to high technology laboratories and by people who range from electronics enthusiasts to students, and service engineers to high technology development engineers. This is easily done using a multimeter set to a voltage range. How to check electronics components with digital multimeter. If you are not sure whether the given transistor is npn type or pnp type.
Diodes are one of the components that can be tested very easily. How to check basic electronic components using a multi. I love to do that, but im a little worried that i might burn some components or the whole circuit. A digital multimeter dmm is a device that provides multiple types of measurements within one device. Aug 23, 2017 hello friends in this vedio i explained how to check electronics components with digital multimeter in this vedio i explained about diode, resistor, transister and capacitor in next vedio i will. Current measurement using multimeter electronics hub. We use the multimeter to measure the resistance, in ohms, of a particular component. Using component test on the fluke 867b graphical multimeters introduction the fluke 867b provides you with the unique ability to test electricalelectronic components in an unpowered circuit. These failures can cause both short circuits and open circuitsboth of which render the wires unusable. Full text of testing electronic components by colin mitchell see other formats. How to use a multimeter to test resistors techrepublic. Use mydaq digital multimeter dmm to test mysnap components if they appear to. Many of us when starting in the field of electronic repair check each electronic component one by one by removing it out from the board.
In this tutorial, were going to give you a brief overview of common electronic components and explain what their functions are. The first steps in checking the circuit are to ensure that it has power being supplied to it. Using a multimeter to test the voltage on a lipo battery. Using a junction diode, we can find out which ohmmeter lead is positive and which is negative. Testing wires before you make a connection is a sure fire way to make sure you are making a proper connection. Over time, these wires can become damaged due to misuse, accidents and component failure. Have a complete understanding of circuit being measured. How to use a multimeter on a circuit board our pastimes. Using certain multimeter models, you can test to be sure that components such as diodes, capacitors, and transistors function properly. In this article, we will go over different tests that we can use to determine whether a transistor is good or not, all by utilizing the ohmmeter of a digital multimeter. For example, 2v measures voltages up to 2 volts, and 20v measures voltages up to 20 volts. You have to have the continuity information as a baseline for reading your other results. Use a multimeter on these test points to see if the voltage measured matches the labeled test point voltage. Testing components electronic circuits and diagrams.
The capacitor is a component which has the ability or capacity to store energy in. Three primary electronic components are used in circuits. 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. However, for resistance, we need to connect our probes to the. Component testing range in multimeter digital multimeter to measure resistance from the black negative com wrote to prob plug and red positive to prob v. A digital multimeter is your safeguard when doing a car alarm, keyless entry or remote car starter installation. How to test a transistor learning about electronics. A complete guide to how to test a battery with a multimeter. Fortunately, using a dmm to get a basic passfail reading from a suspected faulty npn or pnp bipoloar transistor is a simple and quick task. An electronic circuit is composed of various types of components.
When current flows through the resistor, the electrical energy is absorbed by the resistor and dissipated in the form of heat. How to make a continuity tester at home using 9v battery. How to test all electronic components with multimeter resistor. Follow along to master the three most basic functions of a multimeter. Check out this post for more info on how to use a multimeter.
Sometimes you can fix something by letting it run until it finally fails. Introduction to basic electronics, electronic components and projects. Knowing the basics of using a multimeter will be a great help in your troubleshooting efforts. The hardest part of fixing a wire involves locating the defective onea process with which a multimeter can help. Both resistance and voltage tests rely on electricity passing through the part, and the multimeter wont know the difference between a part with the wrong resistance and a part with no continuity. To keep within the rules of these exercises, the only use for the resistance function.
Every fixer should know their way around a multimeter, which has just north of a zillion uses for testing electronic components and circuits. Mar 25, 2003 how to use a multimeter to test resistors. How to test electronic componets testing electronic. Set the knob to 20v in the dc range the dc voltage range has a v with a straight line next to it. Aug 09, 2012 in the same way, when the multimeter is set to amps or milliamps range, it must not be used to measure across any component in a circuit. Acoustic power is applied across an air gap to the circuit under test. Can i burn components short circuit by using a multimeter. Testing electrical systems with a digital multimeter perhaps the most important tool youll use in troubleshooting auto electrical systems is the multimeter.