TAILIEUCHUNG - Electronics for Dummies (2005)2
(BQ) Part 2 book "Electronics for dummies" has contents: Making friends with your multimeter, getting down with logic probes and oscilloscopes, creating your own breadboard circuit, the exciting world of microcontrollers, ten electronics formulas you should know,.and other contents. | Chapter 9 Making Friends with Your Multimeter In This Chapter ᮣ Understanding the basics of multimeters ᮣ Keeping yourself (and your multimeter) safe ᮣ Using a multimeter to measure all kinds of things ᮣ Going digital or analog ᮣ Setting up your multimeter ᮣ Making five basic tests to get started ᮣ Testing resistors, diodes, and other components A multimeter is to an electronics geek as an oxygen tank is to a scuba diver. Sure, you can hold your breath underwater, but not for long; you soon have to come up 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. With this one handy tool, you can not only verify proper voltages but also test whether you have a short circuit or if there’s a break in a wire or connection. 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 learn 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 or if you have a problem that Houston should know about. The Basics of Multimeters The multimeter, also called a volt-ohm meter (or VOM), is the basic tool for anyone working in electronics. You can see a fairly typical modern multimeter in Figure 9-1. TEAM LinG - Live, Informative, Non-cost and Genuine ! 176 Part IV: Getting Your Hands Dirty Figure 9-1: Multimeters test voltages, resistance, current, and continuity. Some also test diodes, capacitors, and transistors. You use a multimeter to take a variety of electrical measurements — hence the term “multi.” With this one tool, you can ߜ Measure AC voltages ߜ Measure DC voltages ߜ Measure resistance ߜ Measure current going through a circuit ߜ Measure continuity (whether a circuit is broken or not) And, depending on the model, you may also be able to test the operation of diodes, capacitors, and transistors to see
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