28029 Parallax Inc, 28029 Datasheet - Page 78
28029
Manufacturer Part Number
28029
Description
KIT PARTS SMART SENSORS W/TEXT
Manufacturer
Parallax Inc
Datasheet
1.122-28029.pdf
(340 pages)
Specifications of 28029
Accessory Type
Parts Kit
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
BASIC Stamp® or Javelin Modules
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
Other names
28029PAR
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Page 66 · Smart Sensors and Applications
The accelerometer you will be working with in this text is the Parallax Memsic 2125
Dual Axis Accelerometer module shown in Figure 3-1. This module measures less than
1
Figure 3-1: Accelerometer Module and MX2125 Chip
People naturally sense acceleration on three axes: forward/backward, left/right and
up/down. Just think about the last time you were in the passenger seat of a car on a hilly
and curvy road. Forward/backward acceleration is the sensation of speeding up and
slowing down. Left/right acceleration makes you lean when making turns, and up down
acceleration is what you felt going over hills.
Instead of the three axes people sense, the MX2125 accelerometer senses acceleration on
two axes. The acceleration it senses depends on how it’s positioned. By holding it one
way, it can sense forward/backward and left/right. If you hold it a different way, it can
sense up/down and forward/backward. Two axes of acceleration is enough for many of
the applications listed earlier. While you can always mount and monitor a second
accelerometer to capture that third axis, three-axis accelerometers are also common.
/
2
” ×
1
/
2
” ×
For a 3-axis accelerometer, try our Hitachi H48C Tri-Axis Accelerometer Module,
Parallax part #28026.
Accelerometer Module
1
/
2
”, and the accelerometer chip itself is less than
MX2125 Chip
1
/
4
” ×
1
/
4
” ×
1
/
8
”.
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