28125 Parallax Inc, 28125 Datasheet - Page 338

• Manufacturer Part Number: 28125
• Description: TEXT ROBOTICS
• Manufacturer: Parallax Inc

Specifications of 28125

• Title: Robotics with the Boe-Bot
• Product: Microcontroller Accessories
• Lead Free Status / RoHS Status: Not applicable / Not applicable

Once you’ve solved for m, you can plug m back into either of the two y = mx + b
equations you started with to get b.
So, the two equations for solving for m and b turn out to be:
Let’s plug our sample values from Table F-2 into the equations and see what the scale
factor (m) and offset constant (b) will be for the left photoresistor. First, calculate m:
Then, use m, y
y (
b
b
b
b
−
m
m
m
m
m
y
−
2
=
=
=
≈
−
y (
=
=
=
=
=
2
=
y
7
215
. 6
−
y
−
y (
y (
y (
(
(
116
2
x (
x (
x (
159
1
mx
2
76
−
215
152
=
=
y
−
2,
2
2
2
2
2
2
1
−
2
mx
−
mx
mx
)
−
−
−
−
−
−
and x
=
−
+
−
(
=
−
x
y
x
y
x
y
. 1
2
1
. 1
b
−
2
1
56
36
1
1
1
1
m
1
+
+
37
37
)
)
)
)
−
)
)
x (
b
) b
)
)
2
−
×
2
to calculate b:
−
152
−
−
x
and
1
−
)
)
−
b
=
y
2
−
mx
2