28029 Parallax Inc, 28029 Datasheet - Page 225

• Manufacturer Part Number: 28029
• Description: KIT PARTS SMART SENSORS W/TEXT
• Manufacturer: Parallax Inc

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

Example
Let's say that the adjacent distance to an object is 10 m, and at that distance the
accelerometer was held 1.5 m from the ground to get the line of sight of the top of an
object. The angle reported by the accelerometer unit was 61°. From this, we can
estimate the height of the object to be 19.54 m, as shown below.
ACTIVITY #2: RECORD AND PLAYBACK
With accelerometer projects, it will often be necessary to record and play back lots of
accelerometer measurements. In some cases, recording the value is the desired function,
like datalogging how a car handles a turn. In other cases, such as detecting the human
walking motion, it will be necessary to understand what the measurements are like before
a program can be written that tracks steps. In either case, recording and playing back
acceleration measurements is a necessary ingredient. This activity introduces a program
with subroutines that demonstrate how to record, play back, and erase values stored in the
unused portion of the BASIC Stamp EEPROM program memory.
EEPROM Storage with DATA, WRITE and READ
While not required for recording and playing back measurements,
used to set aside chunks of unused program memory. The
Adjacent
Accelerome
Accelerome
opposite
object
height
=
=
=
=
distance
10
18
adjacent
(
10
ter
ter
.
m
04
m
=
=
=
)(
18.04
19.54
tan
measured
height
opposite
1
.
804
=
θ
tan
10
m
m
=
)
m
θ
+
1.5
+
1.5
accelerome
θ
=
m
m
61
°
Chapter 6: Accelerometer Projects · Page 213
ter
height
DATA
DATA
directive's optional
directives can be