1. Chapter 3 Engineering Notation

2. Overview  Variation on Scientific Notation Exponents only change by threes  0, 3, 6, 9, 12, etc  0, -3, -6, -9, etc Engineering Notations Exponents match with Engineering Prefixes  Milli matches with 10 -3  Micro matches with 10 -6  Kilo matches with 10 3  Etc.

3. Bill R. Deem and Tony Zannini Electronics and Computer Math, Eighth Edition Copyright ©2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Prefixes used with Electrical units

4. Bill R. Deem and Tony Zannini Electronics and Computer Math, Eighth Edition Copyright ©2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. SI Electrical units

5. Converting Units Converting to Basic Units  Replace Prefix with power of 10 it represents 2200 uS  Yields 2200 * 10 -6 S = 0.002200 S 1100 kW  Yields 1100 * 10 3 W  Equals 1,100,000 W Changing Prefixes  Change exponents 20 mA to ____ uA

6. Converting Units Changing Prefixes  Change exponents 20 mA = 20 * 10 -3 A  1 milli =1000 micro  1 * 10 -3 = 1000 * 10 -6 Thus 20 mA 20000 uA