Electronics for Dummies (2005)2

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Nội dung chi tiết: Electronics for Dummies (2005)2

Electronics for Dummies (2005)2

ChaptersMaking Friends with Your Multimeter•••••••••••••••••••••••••••••••••••••••••••••••••Jn This Chapter>Understanding rhe basics of multimeters>Ke

Electronics for Dummies (2005)2eeping yourself (and your multimeter) safe>Using a multimeter to measure all kinds of things>Going digital or analog>Setting up your multimeterF Makin

g five basic tests to get started>Testing resistors, diodes, and other components•••••••••••••••••••••••••••••••••••••••••••••••••Jfcl multimeter is t Electronics for Dummies (2005)2

o an electronics geek as an oxygen tank is to a scuba r • diver. Sure, you can hold your breath underwater, but not for long: you soon have to come up

Electronics for Dummies (2005)2

for air. As a builder of cool electronics gadgets, you can only experiment for so long before you need a multimeter to take you the rest of the way.W

Electronics for Dummies (2005)2nection. You’d be surprised how much troubleshooting you can do with just these simple tests, and a multimeter does them all.In this chapter, you lear

n the basics of using a multimeter to perform important checks on electronic circuits and parts. These tests help you determine If everything Is A-OK Electronics for Dummies (2005)2

or If you have a problem that Houston should know about.The Basics of MultimetersThe multimeter, also called a volt-ohm meter (or VOM), Is the basic t

Electronics for Dummies (2005)2

ool for anyone working in electronics. You can see a fairly typical modern multimeter in Figure 9-1.TERM LinG - Live, informative. Non-cost and Genuin

Electronics for Dummies (2005)2t, and continuity. Some also test diodes, capacitors, and transistors.You use a multimeter to take a variety OÍ electrical measurements — hence the te

rm “multi." With this one tool, you canp" Measure AC voltagesp" Measure DC voltagesp" Measure resistanceMeasure current going through a circuitp* Meas Electronics for Dummies (2005)2

ure continuity (whether a circuit Is broken or not)Anti, depending on the model, you may also be able to test the operation of diodes, capacitors, and

Electronics for Dummies (2005)2

transistors to see if they’re good.All multimeters come with a pair of test leads, one black and one red (black is for the ground connection: red Is

Electronics for Dummies (2005)2e meter. On larger models, you can unplug the test leatls.If you don't already own a multimeter, you should seriously consider buying one. It’s well w

orth the relatively low cost, considering how much you'll use the meter. Prices for new multimeters range from $10 to over $100. The mainTERM Line - L Electronics for Dummies (2005)2

ive, informative. Non-cost and Genuine !Chapter 9: Making Friends with Your Multimeter 177(inference between the high- and low-priced meters is the fe

Electronics for Dummies (2005)2

atures that you gel, such as built-in testing features for capacitors and transistors. Shop around and compare features and prices. Know that, whateve

Electronics for Dummies (2005)2plex, your multimeter can keep up.Remember: Safety First!Most tests using a multimeter involve low voltage and resistance, both of which can’t hurt yo

u much. But sometimes you may need to lest high voltages, such as the input to an AC-operated power supply. In a case such as this, careless use of th Electronics for Dummies (2005)2

e multimeter can cause serious bodily harm. Even when you're not actively testing a high voltage circuit, dangerous current may be exposed if you work

Electronics for Dummies (2005)2

on certain electronics equipment, such as a radio, hi-fi. or VCR.x Remember this: If you ever need to work with an electronics project that uses ■iy"