User Manual - findMEMS.com
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1. g IONIX Kionix Inc USB Demo Board Kit User s Manual Oct 1 2007 Table of Contents idee stia 1 I Kionix Demonstration Board Technical 1 Il Software lhsfallalio ice 1 seriale librari 2 IM Demo SoftWare E AE R AE A E AER ADE aE irii 2 Te Acceleration 3 2 MISCUNOS CO ash wes un a cps eee teeta det 3 3 Data EOC 3 ceca 4 Ba QUIS i i u i tuddU Odd 4 Bs Freeman 4 Tir SPIACOMPptaesosl Wil i 4 B MVitpaltiglb9SD6L etie E Nee 5 EE Pcia PEE 6 10 Artificial HOZOM 6 11 6 12 Bump Alen 5 5 0 tache rbi dun su 6 TNEGAMES een 7 Freeware Shareware DeMOS nennen nnne 8 Appendix Programmer s Manual nnns 9 uibus AMT 9 8523 RR H M 9 Sensor MethodSs nennen nnn nnne 9 Measurements Available From TriAxis2g Sensor 10 Configuration Options Drm 10 2 COTPIUICSlOTE ss cocto ce hrs ie xm E e 11 eS 11 Appendix B Basic Concepts of2. Y Add the average of velocity X Add the average of velocity Y to position X to position Y The average of velocity X is the average of The average of velocity Y is the average of the X velocity at the beginning of this time period the Y velocity at the beginning of this time period and the X velocity at the end of this time period and the Y velocity at the end of this time period Y Update Screen ball positionX ball positionY 0 Page 1 ball velocityX 0 ball velocityY 0 while running ACCX ACCY ACCZ sensor allreadings OLDVELX ball velocityX OLDVELY ball velocityY Add acceleration to velocity ball velocityX ball velocityX ACCX ball velocityY ball velocityY ACCY For a better feel the following implements friction The best value for FRICTION depends on the application if absolute value ball velocityX FRICTI ball velocityX 0 else if ball velocityX gt 0 then ball velocityX ball velocityX else ball velocityX ball velocityX end if end if if absolute value ball velocityY FRICTI ball velocityY 0 else if ball velocityY gt 0 then ball velocityY 11 I O 0 velocityY else ball velocityY ball velocityY end if end if Add average velocity to position ball posit
3. 005 on Tilt Sensing http www kionix com sensors application notes html 3 Free fall Detection A tri axis accelerometer can be used to detect when an object is in free fall The first step is to calculate the overall magnitude of the acceleration being applied to the object This is done with the Pythagorean Theorem a ay g 2 If the object is in free fall the value will be very close to zero Depending on the rotation of the object however it may be a somewhat higher number see Limitations of These Methods below for details The distance the object fell can be calculated by using gravity g 9 8 m s as acceleration a in the equation for calculating distance d from acceleration a and time t d 142 2 Note that this calculation will produce the wrong number if the object has been thrown upward or downward Again see Limitations of These Methods below for more details 4 Limitations of These Methods While these equations are effective for many applications there are several limitations and gotchas that one has to watch for when using the data returned by the accelerometer Noise In Acceleration gt Velocity gt Distance Calculations All measurements contain a small amount of background noise Unfortunately in an acceleration reading noise can disrupt the apparent velocity of the device This difference will become more apparent over time as the phantom velocity pushes the Page 13 dis
4. Calculating Change in Distance Given vo v and t from previous equations vo v 2 Results in Ad the change distance during the time period Calculating Final Distance Given Ad from the previous equation Ad t Given do the distance at the start of the time period d do Ad Results in d the distance at the end of the time period Conclusion At the end of these equations we have both the final velocity v and the final distance d This information can be used to determine the same values in the next time period resulting in a continuous flow of acceleration velocity and distance data Page 12 2 Calculating Angle of Tilt From Acceleration The acceleration data can also be used to find how far the device is tilted This can be done because the Earth is always pulling on the device with 1g of acceleration If the device is put on a flat surface and is completely still all of that acceleration is on the Z axis The acceleration on the X and Y axes will be zero If the object is put on its side whichever axis is pointed toward the earth will read 1g Getting the angle from the readings on an axis can be done two different ways The simplest way although it is not very exact is to multiply the acceleration on the axis by 90 rotation acceleration 90 For a much more exact value take the inverse sine of the acceleration rotation asin acceleration For more information see Kionix Application Note
5. collection of 2D games that have been modified to accept joypad inputs as well as key strokes Windows identifies tte USB demo board as a gamepad with the X Y and Z axis identified as joystick inputs This makes the USB demo board a motion enabled controller Tilt left to turn left tilt right to turn right Tipping it forward will move your player forward and tipping it back will move your player back Several of these games were created with GameMaker 6 http www gamemaker nl 1 1945 2D scrolling game X and Y axis move the plane Use the space bar to shoot 2 Asteroids Asteroids game by Mark Overmars Tipping the demo board forward Y axis will move the ship There is no backward Rotate the ship 180 and tip forward to slow down Use the space bar to shoot 3 Breakout Standard 2D breakout game Tipping the demo board left and right will move the bat 4 Jump Platform game Use Y to jump 5 Labyrinth Maze game written by Keith Epstein Hold the demo board with the Y axis up and the led facing toward the monitor This game uses the X and Z axis to control the movement of the ball 6 Pacman GameMaker6 demo This is a very basic version of PacMan 7 Plop Written by Keith Epstein Hold the demo board with the Y axis up and the led facing toward the monitor This game uses the X and Z axis to control the movement of the bear Bounce the demo board to drop bombs 8 roll the ball Written by Keith Epstein Hold the demo bo
6. use Persons handling the product s must have electronics training and observe good engineering practice standards As such the goods being provided are not intended to be complete in terms of required design marketing and or manufacturing related protective considerations including product safety and environmental measures typically found in end products that incorporate such semiconductor components or circuit boards This evaluation board kit does not fall within the scope of the European Union directives regarding electromagnetic compatibility restricted substances RoHS recycling WEEE FCC CE or UL and therefore may not meet the technical requirements of these directives or other related directives Kionix warrants that the evaluation board kit sold will upon shipment be free of defects in materials and workmanship under normal and proper usage This warranty shall expire 30 days from date of shipment Kionix will repair or replace at Kionix s discretion any defective goods upon prompt written notice from the Customer within the warranty period Such repair or replacement shall constitute fulfillment of all liabilities of Kionix with respect to warranty and shall constitute Customer s exclusive remedy for defective goods The user assumes all responsibility and liability for proper and safe handling of the goods Further the user indemnifies KIONIX from all claims arising from the handling or use of the goods Due to the open constr
7. with the board on the USB cable 9 Theft Detection Movement detection for laptops Plug the dongle into the USB port of the laptop The accelerometer is set to detect tilt This nl x allows the user to type and move the laptop but even a small Sensitivity 10 tilt will sound an alarm The sensitivity can be changed and the Password 7 password for unlocking the alarm can be set The Lock button T T will arm the system so that any tilt will cause an alarm to sound through the computers speakers Type your password to Un Unlocked arm the program and change the sensitivity The default password is testpass If you forget the password close the Figure 9 Theft Detection program and start again 10 Artificial Horizon This demo is meant to show how an accelerometer can be used to sense tilt and pitch the way an artificial horizon shows roll and pitch in an airplane Figure 10 Horizon 11 Screen Rotation Similar to artificial horizon this demo shows how an accelerometer sensing roll can keep an image or an object flat and level on the screen Figure 11 Screen Rotation 12 Bump Alert MET Detects even the slightest vibration Plug the dongle 008 into the USB port of the laptop and begin the program The accelerometer is set to detect any motion Even pee the slightest vibration will trigger the alarm Figure 12 Bump Alert Page 6 PC Tilt Games A
8. 12 1 Calculating Velocity and Distance From Acceleration 12 Calculating Change Etre tiere eee 12 Calculating Final Hr perve Rie 12 Calculating Change in Distance iii 12 Calculating coe sob eod ob ace Gd ee ho hed 12 GORGIUSIOIE 12 2 Calculating Angle of Tilt From 13 sS Froe4tali Deleclionat aiar datu i 13 4 Limitations of These 13 Noise In Acceleration gt Velocity gt Distance Calculations 13 Differentiating Between Tilt and Motion 14 Rotation and Center of Mass in Free fall Detection 14 Free fall Time When an Object is ThrOWN 14 Appendix C Algorithm References ii 1 1 Converting From Acceleration to Tilt 1 2 Controlling a Rolling Ball by Tilting 1 3 Detecting Freefall uctor De trn Eid ead ieri 3 4 Jolt Detection 4 EVALUATION BOARD KIT IMPORTANT NOTICE KIONIX provides the enclosed product s under the following conditions This evaluation board kit is intended for ENGINEERING DEVELOPMENT DEMONSTRATION OR EVALUATION PURPOSES ONLY and is not considered by KIONIX to be a finished end product fit for general consumer
9. ard with the Y axis up and the led facing toward the monitor Hit the black ball 10 times before your time runs out to move to the next level 9 Rotate Written by Keith Epstein This game uses all three axis of the accelerometer Match the numbers by turning the board in all three axis in the correct direction This is unlike any game you have ever played Page 7 10 screen rotation Demo by Keith Epstein 11 Street race Scrolling game by Mark Overmars X and Y axis control the car Freeware Shareware Demos 12 Connman 150 A freeware pacman game from ConnectiX http www connectix gr Use X and Y axis to move the player Freeware 13 FatHead A Groovy Lime http groovylime com platform game by Trevor Simpson X axis moves the player left and right Y axis jumps the player Freeware 14 Hamsterball Demo game available fromRaptisoft http www raptisoft com hamsterball shtml Page 8 Appendix A Programmer s Manual 1 Perl API The Perl API for the Kionix demo board provides an easy object oriented interface for a Perl programmer to access acceleration data It is invoked in much the same way as any other Perl module and returns an object which can be used to interact with the sensor Usage Create a new Sensor object from scratch use Sensor my Sensor Sensor new Serial TriAxis2g Port gt 1 Sensor gt open or warn Failed to open sensor Create a Sensor object fro
10. erly The default sensitivity is 2g Adjust X Y Z These are the amounts by which each reading on the relevant axis is adjusted in g s before it is returned This is to account for any slight variations in center the device might have Dead Zone X Y Z This is the minimum absolute value a reading must reach before it is registered If it is below this value it will be read as zero Having a dead zone can filter out noise but at the cost of losing real readings if they are very small The default of 0 is perfect for the demonstration programs When you are finished adjusting the settings press Save to save and exit the program IV Demo Software Various demos are included with this distribution to demonstrate the capabilities of the tri axis accelerometer and to get you started writing your own applications The demo programs are written in the Perl scripting language which is an easy to learn and extensible language for anything from simple tasks to complex programs and web applications For more information on Perl visit www perl org Several of these demos also use the OpenGL graphics system For more information on OpenGL visit www opengl org Page 2 1 Acceleration Data The Acceleration Data demo shows the current readings of the device in the most raw form as is possible For those interested in pure data a device could be attached to a piece of memory to store a running log of all readings The data could be retr
11. h case the user at his own expense will be required to take whatever measures may be required to correct this interference Kionix Inc 36 Thornwood Drive Ithaca NY 14850 www kionix com Kit Contents 1 Kionix USB demo board 2 USB A male mini 4 cable 3 4 CD with program files and user s manual 5 Quick start guide USB A male mini 4 adapter Demo Kit Kionix Demonstration Board Technical Overview Demo boards are available in 1 50 2g 3g 5g 10g and 20g sensitivities The demo board is powered by the USB port It receives a 5V current and converts it to the 3 3V Vdd used to power its components The X Y and Z axis lines are connected to the analog to digital converters on the USB chip The sensor runs at a bandwidth of 50Hz The demonstration programs read samples at about 250 samples second II Software Installation Connect the Demonstration Board to the mini USB connector on the USB cable Connect the USB A end of the cable to the USB port on your PC Run the KionixDemos exe program from the CD or from the Kionix website http www kionix com sensors downloads html Run the Configuration program from Start Menu gt Kionix Demos to configure and calibrate the sensor See Configuration below Page 1 III Configuration The configuration program shown in the figure below will allow you to configure communication with the device PTk 1ni x 1 Interface The me
12. ieved later for analysis The actual collection and processing of accelerometer data does not require very much processor power and the sample rate of the device is very high so an accelerometer can be added to almost any application while creating minimal overhead 2 Oscilloscope ini x Kionix Serial Demo Board 2 tri axis Acc 1 000 0 046 AccyY 0 005 7 0 992 Status Figure 2 Acceleration Data Kionix Accelerometer Demo The Virtual Oscilloscope demo graphs data in a simple T visual format to give the viewer a general idea of the pattens present in the motion of the device By recognizing these patterns such a device could become integral in several kinds of applications A free fall detector could be used to protect important data by spinning down a hard drive before it hits the ground A jolt detector could create a record of package mishandling during shipping A vibration detector could be placed on a piece of machinery to issue an alert if the pattern of movement changes significantly indicating the possible need for maintenance 3 Data Logger The data logger takes a constant stream of Figure 3 Oscilloscope x readings from the device and graphs them in real time to the screen Sampling is done by setting the time you wish to sample the rate at which you wish to sample and pressing Go NATE MOTA vc c Note that the sample rate y
13. ionX ball positionX average ball velocityX OLDVELX ball positionY ball positionY average ball velocityY OLDVELY end while Page 2 ON then FRICTION FRICTION ON then FRICTION FRICTION 3 Detecting Free fall r Read accelerations X Y andZ Calculate total acceleration sqrt x 2 y 2 z 2 Y Compare A to the freefall threshold Depending on the application 0 3g to 0 5g is usually a reliable threshold Y Is A greater han threshold No Freefall Not Freefall FREEFALL 0 3 g Threshold under which the object is considered to be in free fall IN FREEFALL false Stores whether or not the device is falling while running ACCX ACCY ACCZ sensor allreadings TOTAL ACC square root ACCX 2 ACCY 2 ACCZ 2 if TOTAL ACC FREEFALL then IN FREEFALL true else IN FREEFALL false end if end while Page 3 4 Jolt Detection Start 4 2 Read accelerations Y and Z Y Calculate total acceleration ACC 2 2 2 2 Y Compare ACC to LAST ACC Difference greater than JOLT_THRESHOLD JOLT_THRESHOLD 1 g Amount by which the overall acceleration reading mus
14. m an existing configuration file use Sensor my Sensor Sensor newFromConfig default ini Sensor gt open or warn Failed to open sensor Sensor Methods The following methods are universal to all Sensor objects Sensor gt new SInterface SDevice Options Create a new object based on the interface driver 1nterface and the device driver SDriver The Options hash will be used to override default options if it is included Sensor gt newFromConfig SFile Override Create a new object reading configuration options from File The Override hash be used to override options read from the configuration file SSensor loadConfig SFile Load configuration options from rile and apply them to Sensor SSensor configure S Key SValue Sets a configuration option for the object Valid options are detailed in Configuration Options below Sensor open Opens the sensor and prepares it for reading Returns true or false depending on if the open was successful SSensor gt close Closes the sensor Returns true of false depending on if the close was successful SSensor gt canMeasure SSensor gt canMeasure SReading SSensor canMeasure Readings Page 9 When called with no parameters canMeasure returns a list of all the readings a sensor can return When called with one parameter canMeasure returns a true or false indicating if that reading can be returned When called with multiple para
15. meters canMeasure returns a true or false value indicating if all of the readings can be returned SSensor gt status Returns the status of the device 1 indicating a ready status and 0 indicating a bad status If there is no way to determine the status of the device this command returns undef Sensor gt Reading Return the desired reading as indicated by Reading Reading can be any of the measurements returned by Sensor gt canMeasure For an example see Measurements Available From a TriAxis2g Sensor below Measurements Available From a TriAxis2g Sensor SSensor gt Accx Sensor gt AccY SSensor gt AccZ Returns acceleration on the X Y or Z axis This value is in g s the acceleration due to the Earth s gravity That is 1g 9 8m s Fortilt calculations 1g 90 More information on using the values returned by an accelerometer can be found in Appendix B Basic Concepts of Motion SSensor Acc Unlike the other readings Acc is a calculated value It is based on AccX AccY and AccZ using the Pythagorean Theorem in three dimensions It is a measurement of the magnitude of the acceleration currently being applied to the accelerometer without the direction It is useful for applications such as jolt and free fall detection SSensor gt AccAll Returns an array of the X Y and Z accelerations Note that because all three of these are sampled anyway each time any one reading is taken usi
16. nfo wXpos 32768 26214 4 Sensitivity AdjustX The resulting number is the acceleration value returned by the sensor in g s Page 11 Appendix B Basic Concepts of Motion The concepts discussed in this section are widely available and are a part of any Physics course but they have been reproduced here both as a refresher and as a quick reference useful to anyone working with accelerometer data There is also a discussion of the limitations of these methods when used to determine the position or tilt of a device using a tri axis accelerometer 1 Calculating Velocity and Distance From Acceleration Given an acceleration a and a period of time t it is possible to calculate the change in velocity during the relevant time period If the original velocity is also available the velocity at the end of the time period and the change in position over the time period can be calculated Lastly if the original position is available the position at the end of the time period can be calculated This can be done according to the steps below Calculating Change in Velocity Given a the acceleration applied on the axis Given t the time period for which the acceleration was applied Av at Results in Av the change in velocity during the time period Calculating Final Velocity Given Av from the previous equation Given vo the velocity at the start of the time period v vytAv Results in v the velocity at the end of the time period
17. ng this method is three times faster than calling AccX AccY and AccZ in succession Configuration Options The following options can be passed to the configure method Port This option is accepted by any object using the Serial interface driver It specifies which COM port the sensor is plugged into AdjustX AdjustY AdjustZ These options are accepted by sensors which can return AccX AccY and AccZ Specifically the calculation used to get overall acceleration is y 2 Page 10 respectively They are the amount by which the reading is adjusted to account for slight offsets in the zero position of the sensor These are usually set during a calibration process like the one in the configure pl example script DeadZoneX DeadZoneY DeadZzoneZ These options are accepted by sensors which can return AccX AccY and AccZ respectively They specify a minimum absolute value above which each reading must be If the reading is within the dead zone for the axis it is simply returned as zero These are usually set to filter out noise when the device is level 2 Communication For those who wish to communicate with the device in their own program or programming language of choice this section details how communication with the demo board takes place The USB demo board communicates with Microsoft Windows as a generic 3 axis game controller As such it will show up in a Game Controller or Gaming Options c
18. o forces except for gravity are acting on it That means that if you throw the device upward it will be in free fall even when it is falling upward Similarly being thrown downward will shorten the time the object is in free fall before it hits the ground Either of these events will throw off the equation presented in Free fall Detection above which assumes that the object was released into free fall with a velocity of zero This limitation is not an issue for applications such as hard drive protection as they are only concerned with the fact that the object has been dropped but can adversely affect applications in which the distance the object fell is important In these cases it may be better to use an accelerometer with a higher range and implement impact detection instead of using a low range accelerometer for detecting free fall Page 14 Appendix C Algorithm References 1 Converting From Acceleration to Tilt X roll vul VY 22 Y pitch 0 ws Faz 2 Controlling a Rolling Ball by Tilting C Sun D i Initialize Ball with position and velocity at zero i Read accelerations X and Y Add acceleration X to velocity X gt Add acceleration Y to velocity Y Y Slow velocity X by FRICTION Slow velocity Y by FRICTION The best value for FRICTION depends Bd The best value for FRICTION depends on the application on the application
19. ontrol panel This control panel can be used to test the connection to the USB demo board and calibrate the response of the X Y and Z axis Note that calibration settings of another game controller can affect the response of the demo board for Kionix s Demonstration Software When running the Demonstration Software reset the calibration to default before running Kionix s configuration routine Windows multimedia joystick API commands can be used to obtain the X Y and Z axis information In particular the JOYINFO structure and the getJoyPos query are used in Kionix s Perl demos to obtain the data from the demo board Please see http msdn2 microsoft com en us library ms709359 aspx for more information about the JOYINFO structure Please see http msdn2 microsoft com en us library ms709352 aspx for more information about the joyGetPos query Return Values The value returned for an axis reading Xpos Ypos or Zpos is a 16 bit integer The resulting value represents a number on an arbitrary scale set by the analog to digital converter taking the reading To convert this value to acceleration in g s subtract the 0g Offset or center 32768 for a 16 bit operation Then divide by the sensitivity rating of the part in g The default demo board uses a device with a sensitivity of 2g An adjustment based on the calibration can be added to calculation to correct for any errors in the Og reading as shown in the following equation AccX JoyI
20. ou specify is the target sample rate If you specify a very high number the program may read less samples than you expect If you wish to save the data you collected press Save to write the data to lu a CSV comma separated values file You can then use Excel MatLab etc to analyze and graph the data Page 3 Sample Time Seconds Sample Rate 5o Samples Second Figure 4 Date Logger 4 3D Ball The 3D Ball demo is a simple demonstration of accelerometer based controls in video games By tilting the device the user is able to roll the ball around the board and roll over the red target Additionally a strong bump applied to the z axis of the device will cause the ball to bounce into the air A game development team could use this unique control scheme to add a new level of playability to games like the classic Marble Madness by Atari Games or to create an entirely new game of their own Other games which this could be used with include motorcycle racing snowboarding skateboarding and jet fighter games Figure 5 3D Ball Kionix Blackbox Demo gigi 5 Cursor The mouse cursor is a simple demonstration of the idea of a tilt mouse After opening the program the mouse cursor can be moved by tipping the device To end this program press CTRL C 6 Freefall Free fall Detector demo is an example of the free fall it Time s Distance ft detection algo
21. rithm described in Appendix B It registers when it 1 0733 079 has been in free fall for half a foot then reports how far it fell i i when it reaches the bottom of its fall Logging can be 2 0536 4613 temporarily paused with the Stop button or the log can be 3 0235 1 409 saved to a CSV comma separated values file with the Save button For more details on the algorithm see Free fall Detection in Appendix B ER Stop Save Quit Figure 6 Freefall 7 Spaceship This Perl program demonstrates how an accelerometer can be used as a game controller The tilt action is translated to control the movements of a virtual spaceship Avoid the asteroids If you crash into an asteroid the game will end and need to be closed and restarted to begin again Page 4 Figure 7 Spaceship 8 Virtual Light Saber The virtual light saber shows the unique values available from a tri axis accelerometer The light saber is activated by picking up or moving the demo board As you move the demo board the light saber will mimick your moves Ten seconds of inactivity will cause the saber to turn off Moving the demo board will again activate the light saber Page 5 Figure 8 Virtual Light Saber Demo Software for the Dongle The following four software demos work best when the demo board is plugged directly into the USB port of a notebook computer using the mini4 male A USB adapter They still work
22. t change between readings to be considered a PI jolt ACCX ACCY ACCZ sensor allreadings LAST ACC square _ root ACCX 2 ACCY 2 ACCZ 2 while running ACCX ACCY ACCZ sensor allreadings ACC square root ACCX 2 ACCY 2 ACCZ 2 JOLT absolute value ACC LAST ACC if JOLT JOLT THRESHOLD then A jolt has occurred end if LAST ACC ACC end while Page 4
23. tance measurements farther and farther from reality This change will be relatively slow however due to the low noise nature of the device The difference can also be made less visible by taking an average of several readings instead of acting on each reading as it arrives A dead zone can also be implemented risking the possible loss of the actual readings if they are very small Differentiating Between Tilt and Motion While the ability to measure either motion or tilt is very useful it comes with the unfortunate disadvantage of not being able to easily differentiate between the two The z axis of this device may make this distinction possible on the x and y axes by watching the effect of the acceleration in question on the z axis and the acquired data could be applied to future demos Of course associated equations will also be made available Rotation and Center of Mass in Free fall Detection Centripetal acceleration present if the object is rotating can throw off free fall detection by causing the overall acceleration of the object to be significantly higher than zero even when the object is actually in free fall This effect can be reduced by putting the device in a heavy casing positioning the accelerometer as close as possible to the device s center of mass and allowing a range of values to represent free fall 0 0 to 0 5g is usually a safe range to use Free fall Time When an Object is Thrown An object is in free fall as soon as n
24. thod used to communicate with the device Currently the method is Gamepad the USB COM Gamepad port of the computer Device MiniUSB Gamepad 2 Device The driver specific to the Kionix part being used aes oe Because the tri axis accelerometer is used through the nor gamepad driver the driver named MiniUSB is accessed E 3 Serial Port This selects the serial port to which the Performance device is connected Press Scan to limit the list to ports ses 2 5 that can actually be accessed A label to the right of the Adiustx 01321533 g r Adjust Y D button will appear showing how many ports were found to 2 EE be available Then select the port to which the device is s connected from the address pull down above and press perdzore vii o Test to check that the device is connected properly If it is a label will appear to the right of the Test button cea confirming that the test was a success Figure 1 configure pl 4 Performance These boxes show the adjustments made to readings received You may enter these manually if you wish but it is easiest to lay the device flat press Calibrate and accept the default settings Sensitivity This is a pull down menu for selecting the sensitivity of the demo board Sensitivity is set at the factory You must select the correct g level for your board or the demos will not function prop
25. uction of the product it is the user s responsibility to take any and all appropriate precautions with regard to electrostatic discharge IT IS HEREBY EXPRESSLY AGREED THAT KIONIX MAKES AND CUSTOMER RECEIVES NO OTHER WARRANTY EXPRESS OR IMPLIED THAT ALL WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED AND THAT KIONIX SHALL HAVE NO LIABILITY UNDER ANY CIRCUMSTANCES FOR CONSEQUENTIAL INCIDENTAL OR EXEMPLARY DAMAGES ARISING IN ANY WAY FROM THE MISUSE OF ITS PRODUCTS KIONIX assumes no liability for applications assistance customer product design software performance or infringement of patents or services described herein No license is granted under any patent right or other intellectual property right of KIONIX covering or relating to any machine process or combination in which such KIONIX products or services might be or are used FCC Warning This evaluation board kit is intended for ENGINEERING DEVELOPMENT DEMONSTRATION OR EVALUATION PURPOSES ONLY and is not considered by KIONIX to be a finished end product fit for general consumer use It generates uses and can radiate radio frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules which are designed to provide reasonable protection against radio frequency interference Operation of this equipment in other environments may cause interference with radio communications in whic
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