28017 Parallax Inc, 28017 Datasheet

KIT DEMO ACCELEROMETER MEMSIC

28017

Manufacturer Part Number
28017
Description
KIT DEMO ACCELEROMETER MEMSIC
Manufacturer
Parallax Inc
Series
BASIC Stamp®r
Datasheet

Specifications of 28017

Sensor Type
Accelerometer, 2 Axis
Sensing Range
±2g
Interface
I²C
Sensitivity
512 counts/g
Voltage - Supply
2.7 V ~ 5.25 V
Embedded
No
Utilized Ic / Part
BASIC Stamp® or Javelin Modules
Product
Microcontroller Accessories
Flash
512 KB
Timers
10 x 8 bit
Operating Supply Voltage
5 V
Board Size
69.34 mm x 46.99 mm x 21.84 mm
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Memsic 2125 Accelerometer Demo Kit (#28017)
Acceleration, Tilt, and Rotation Measurement
Introduction
The Memsic 2125 is a low cost, dual-axis thermal accelerometer capable of measuring dynamic
acceleration (vibration) and static acceleration (gravity) with a range of ±2 g.
existing applications, the Memsic 2125 is electrically compatible with other popular accelerometers.
What kind of things can be done with the Memsic 2125 accelerometer?
possibilities, here's a small list of ideas that can be realized with a Memsic 2125 and the Parallax BASIC
Stamp
Packing List
Verify that your Memsic 2125 Demo Kit is complete in accordance with the list below:
Note: Demonstration software files may be downloaded from www.parallax.com.
Features
Connections
Connecting the Memsic 2125 to the BASIC Stamp is a straightforward operation, requiring just two IO
pins. If single-axis tilt of less than 60 degrees is your requirement, only one output from the Memsic
2125 need be connected. See Figure 1 for connection details.
© Parallax, Inc. • Memsic 2125 Accelerometer Demo Kit (#28017) • 09/2004
®
Dual-axis tilt sensing for autonomous robotics applications (BOE-Bot, Toddler, SumoBot)
Single-axis rotational position sensing
Movement/Lack-of-movement sensing for alarm systems
Parallax Memsic 2125 Demo PCB (uses Memsic MXD2125GL)
Documentation
Measure 0 to ±2 g on either axis; less than 1 mg resolution
Fully temperature compensated over 0
Simple, pulse output of g-force for X and Y axis – direct connection to BASIC Stamp
Analog output of temperature (TOut pin)
Low current operation: less than 4 mA at 5 vdc
microcontroller:
599 Menlo Drive, Suite 100
Rocklin, California 95765, USA
Office: (916) 624-8333
Fax: (916) 624-8003
°
to 70
°
C range
General: info@parallax.com
Technical: support@parallax.com
Web Site: www.parallax.com
Educational: www.stampsinclass.com
While there are many
For integration into
1

Related parts for 28017

28017 Summary of contents

Page 1

... If single-axis tilt of less than 60 degrees is your requirement, only one output from the Memsic 2125 need be connected. See Figure 1 for connection details. © Parallax, Inc. • Memsic 2125 Accelerometer Demo Kit (#28017) • 09/2004 599 Menlo Drive, Suite 100 General: info@parallax.com Technical: support@parallax ...

Page 2

... At this point the standard equation provided by Memsic can be applied, adjusting the values to account for the pulse-width in microseconds. hence the final multiplication. The result is a signed value representing g-force in milli-g's (1/1000th g). © Parallax, Inc. • Memsic 2125 Accelerometer Demo Kit (#28017) • 09/2004 2 A(g) = ((T1 / T2) – 0.5) / 12.5% ° ...

Page 3

... BS2, BS2E Scale CON $200 #CASE BS2SX Scale CON $0CC #CASE BS2P © Parallax, Inc. • Memsic 2125 Accelerometer Demo Kit (#28017) • 09/2004 Calculations for ' X input from Memsic 2125 ' Y input from Memsic 2125 ' 2.0 us per unit ' 0.8 us per unit 3 ...

Page 4

... DEC (yRaw / 1000), ".", DEC3 yRaw, " ms", CLREOL, CR, "G Force... ", (ymG.BIT15 * 13 + " "), DEC (ABS ymG / 1000), ".", DEC3 (ABS ymG), " g", © Parallax, Inc. • Memsic 2125 Accelerometer Demo Kit (#28017) • 09/2004 4 ' 0.75 us per unit ' 1.88 us per unit ...

Page 5

... LOOP angle = angle */ 360 RETURN Arcsine: GOSUB Arccosine angle = 90 - angle RETURN © Parallax, Inc. • Memsic 2125 Accelerometer Demo Kit (#28017) • 09/2004 ' update about 5x/second ' read pulse output ' convert to uSecs ' calc 1/1000 displacement ' fix sign ' y displacement ' fix sign ...

Page 6

... HiPulse CON 1 LoPulse CON 0 © Parallax, Inc. • Memsic 2125 Accelerometer Demo Kit (#28017) • 09/2004 input from Memsic 2125 ' Y input from Memsic 2125 ' 2.0 us per unit ' 0.8 us per unit ' 0.75 us per unit ' 1.88 us per unit ' measure high-going pulse ...

Page 7

... Scale xmG = ((pulse / 10) - 500 PULSIN Yin, HiPulse, pulse pulse = pulse */ Scale ymG = ((pulse / 10) - 500 RETURN © Parallax, Inc. • Memsic 2125 Accelerometer Demo Kit (#28017) • 09/2004 ' degrees symbol ' pulse input ' g force (1000ths) ' binary radians ' read X and Y ' calculate angle ...

Page 8

... SampleDelay CON 500 AlarmLevel CON 5 XLimit CON 5 YLimit CON 5 ' -----[ Variables ]------------------------------------------------------- © Parallax, Inc. • Memsic 2125 Accelerometer Demo Kit (#28017) • 09/2004 pulse input ' Y pulse input ' reset LED ' alarm LED ' measure high-going pulse ' 0.5 sec ' 5 x SampleDelay ' x motion max ' y motion max ...

Page 9

... PULSIN Yin, HiPulse, yMove xMove = xMove / 10 yMove = yMove / 10 PAUSE SampleDelay RETURN ' Blink Alarm LED ' -- will run until BASIC Stamp is reset © Parallax, Inc. • Memsic 2125 Accelerometer Demo Kit (#28017) • 09/2004 ' x calibration value ' y calibration value ' x sample ' y sample ' x axis difference ' y axis difference ...

Page 10

... LTC1298). Details: • Output calibrated to 1.25 volts @ 25.0 • Output change: 5 millivolts per degree C © Parallax, Inc. • Memsic 2125 Accelerometer Demo Kit (#28017) • 09/2004 10 ' blink alarm LED ' loop until reset This would make an interesting, intelligent "leash" for a ° ...

Related keywords