Writing A Number in Engineering Notation

• Shift the decimal point in “groups of three” until the number before the decimal point is between 0 and 999.

• Multiply by a power of 10 that is equal to the number of places the decimal point has been moved.

• The power of 10 is positive if the decimal point is moved to the left and negative if the decimal point is moved to the right.

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Commonly Used SI Prefixes

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Value Prefix Symbol

1012 tera T

109 giga G

106 mega M

103 kilo k

10-3 milli m

10-6 micro

10-9 nano n

10-12 pico p

10-15 femto f

How To Read A Resistor’s Value

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Resistor Color Code

How To Read A Capacitor’s Value

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First Digit

First Figure

Second Digit

Second Figure

Third Digit

# of Zeros

Fourth Digit

Tolerance

7 2 K

4 7 00 K

4700 pF 10%

Code Tolerance

A ±0.05%

B ±0.1%

C ±0.25%

D ±0.5%

F ±1%

G ±2%

J ±5%

K ±10%

M or NONE ±20%

N ±30%

Q −10%, +30%

S −20%, +50%

T −10%, +50%

Z −20%, +80%

Disc Capacitors

Note: Units on Disc Capacitors are always in pico-farads

Common Electronic Components Displays

1) Seven Segment Display

2) Light Emitting Diodes (LED)

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Common Electronic Components Integrated Circuits (IC’s) & Sockets

1) 8 Pin Solder Socket

2) 14 Pin Solder Socket

3) 14 Pin DIP IC

4) 8 Pin DIP IC

5) 40 Pin DIP

6) 14 PIN SOIC

7) 8 Pin SOIC

8) 44 Pin PLCC6

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6

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DIP – Dual Inline PackageSOIC – Small Outline Integrated CircuitPLCC - Plastic Leaded Chip Carrier

Common Electronic Components Misc Components

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2 3

1) Fuses

2) Transistor

3) Diodes

4) Dime

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