Hardware Reference
In-Depth Information
type of resistor has long legs to i t easily into a breadboard for rapid prototyping
of circuits. Other kinds of resistors include surface-mounted resistors, available
if you need to save space and are working on a printed circuit board, but they
can be difi cult to solder. The most common resistors look like the component
shown in Figure 3-5.
R
1
× R
2
R
1
+ R
2
=
R =
R
1
R
2
Figure 3-4:
Resistors in parallel
Resistor
LED
Figure 3-5:
A common axial 10% tolerance resistor
Note the bands of color on the resistor; resistors are too small to put any
readable text on and are color-coded to indicate their value. Typically, you'll
i nd resistors with 4 stripes on them, though versions with 5 or 6 bands exist
as well. Table 3-1 lists the color code.
Table 3-1:
Resistor Color Code
COLOR
DIGIT 1
DIGIT 2
MULTIPLIER
TOLERANCE
Black
0
0
x 10
0
x 10
1
Brown
1
1
Red
2
2
x 10
2
Orange
3
3
x 10
3
Yellow
4
4
x 10
4
x 10
5
Green
5
5
Blue
6
6
x 10
6
Continues
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