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Hi all.
This has been bugging me for a while.
Does the xperia actually have a accelerometer?
Don't see it mentioned in the white papers or previews.
as far as i know it dont
as you say it's not mentioned and the
prerelease version people have
been reviewing dont seem to
i'd like an accelerometer myself but also the option to turn it off
AFAIK it does.
I'm 95% sure it doesn't. Atleast not the one i've been using.
Didn't the early prototype vids show it having one?
Maybe I'm just thinking of the Diamond...idk
It switches to landscape when you open the keyboard. Otherwise, the pre-release doesn't have an accelerometer.
I used to have a link, but cannot find it anymore, But back when it was announced, there was a video shot with one of SE reps showing off the phone. (i know, there were hundreds!)
At that time he was distinctly talking about the X1 using the front facing cam to pick up and recognise gesture controls. I have since seen a press release(again, lost, sorry, but try ESATO or SENSE) that SE were dealing with a company who specialise in that line of things.
What i do find odd, maybe just my ignorance, is that as similar as HTC Touch Pro, and X1 are internally, how SE did not have the accelerometer installed. Surely it would only add a small amount to the total cost of the phone?
Yeah, even for a consumer to buy a cheap acceleromenter is only like $1, lol
I've got a very technical, but very elemental question on this subject, please forgive me for being such a nerd.
What do I ultimately need an accelerometer for in a phone?
How does this accelerometer function work anyway?
In laptops I can understand it's function to protect the hard drive.
As soon as it detects high accelerations (i.e. "free fall" --> acceleration of 9.81m/s^2 = 1g) it shuts down all moving parts in anticipation of an imminent impact (which because of the sudden stop results in massive accelerations around 1500g and more).
Easy physics, no mystery there...
But in mobile phones an accelerometer is often mentioned in relation to automatically rotating screens and of course apple's famous ball-through-labyrinth-game.
Technically an accelerometer on its own cannot do that. All you get from this device is a statement like
"The velocity of rotation around the phone's z-axis is increasing by 3 rad/square-second."
so in order to know the phone's orientation from that you'd need
1. initial calibration (i.e. tell the phone where "down" and "stop" is every time you turn it on)
2. constant measurement of acceleration on all 6 spacial axes (miss one move and your calibration is off).
As far as I can tell there's no note in the iPhone's Manual saying you may only turn it on when it's sitting on a stationary horizontal surface (so much for initial calibration).
And I can imagine the electronics reading the accelerometer go into a low-power "alarming amplitude only" state too most of the time to preserve battery power. Also you'd have to consider the Earth's rotation and path in that calculation too, since the measurement is rather absolute.
Besides, there are more simple and reliable methods out there to to create an artificial horizon (gravity sensor), so what's the benefit of using an accelerometer in the first place?
So, how do these Phones really know where "down" is to auto-rotate my screen if they use an accelerometer, and why not use something simpler?
The only benefit I see is for car navigation software to use the sensor when the GPS signal vanishes (in tunnels etc.) to extrapolate your course from the last confirmed position and velocity, but as far as I know they don't even use it (yet).
Ok, let's say either:
A) you have a slight factory calibration so it can "guess" which direction.
B) it dynamically calibrates as the phone is held/moved/twisted.
C) It's not near perfect, just a guesstimate of movement.
and
it's just for screen rotation and games
dont believe gps's use it as it's not precise enough
Let me apologize first, because, I know nothing about all that disertation about accelerometers. But let me have my street guy comon sense opinion.
First I don't think these phones have such a sofistcated type of accelerometer. The use of the accelerometer word in mobile phones is a missnomer because I'm sure they have something simpler that I would call it "Balancerometer"
I believe it's just 2 or 3 tubular circles perpendicular to each other. These tiny tubes are filled with some kind of liquid The reading of the position of these liquid is enough to know the position of the device ex: Vertical, horizontal, diagonal at any angle of mesurement. It probably cost no more than $2.00 in mass production.
You know better tha me. Do you think I am crazy or worst?
GSM Arena says
Size 800 x 480 pixels, 3.0 inches
- Full QWERTY keyboard
- Accelerometer sensor for auto-rotate
- Optical joystick navigation
Click to expand...
Click to collapse
http://www.gsmarena.com/sony_ericsson_xperia_x1-2246.php
But then again ... who knows.
In the diamond app forum, Ikari creatied pocket gforce which from the picture, its not just a simple tilt sensor. Even I wonder why we need the full thing.
But cool though.
x1_wp_r3a.pdf manual
I have the manual above. Not sure where I got it from .... but it doesn't mention accelerometer and it is SEs own May 08 X1 whitepaper.
It detailed many things people suggested the X1 didn't have ... like it does have hardware for 3D accelerated graphics and the supporting drivers ... It also cleared up the actual RAM - 256m rather than the oh ... there is some sort of 400m of something.
Intro was as follows :
XPERIA™ is premium brand in the Sony Ericsson portfolio to meet the consumer need for a converged entertainment and mobile Web communication experience. XPERIA™ delivers a premium experience of energized communication - anytime, anywhere, anything and with anyone.
X1 is the first product on the XPERIA™ lineup and introduces new experiences for mobile productivity with an extraordinary new blend of multimedia, enterprise and Web functionality. The need for multiple devices – such as a mobile phone, an e-mail client, a mobile companion for a PC and more – are all met in one device with easy-to-use functionality. A sturdy metal design to withstand everyday use and a ground breaking XPERIA™ panel combine to give a seamless and premium user experience.
Features include:
•3-inch Wide-VGA (800x480) TFT 65K color LCD
•XPERIA™ panel concept
•Unified Media Experience
•3.2-megapixel camera with Touch auto focus
•Video capture and playback up to 30 fps
•Integrated WiFi and A-GPS
•Mobile broadband
•Handsfree headset with a 3.5 mm audio jack, USB charger, USB cable provided in the kit
•Internet Explorer Mobile browser
•HSDPA 7.2Mbps, HSUPA 2Mbps
•Windows Mobile® 6.1 Professional
•YouTube support (3GPP playback)
•FM radio, streaming audio/video
•Video telephony
•Bluetooth™ 2.0
•HW 3D Graphics
•Supports microSD™ High Capacity memory card
•Exchange /IMAP4/POP3 e-mail
•Quad-band EDGE (850/900/1800/1900 MHz)
•Tri-band HSPA X1a850/1900/2100 MHz) X1i900/1900/2100 MHz) )
The slim arc form factor has a large 3-inch Wide-VGA color screen. Memory capacity is up to 400 MB internally and includes a slot for a microSD™ card. The ergonomically designed QWERTY keypad allows you to quickly write text messages, type phone numbers or search for particular content such as pictures or tracks. The user can quickly toggle between different relevant functions, tailored for all situations in life, and use them as active desktop home screens by using the unique XPERIA™ panel concept.
Panel stuff :
•Sony Ericsson panel – a panel to read news, weather, finance, world clock and shortcuts to communication and applications.
•Media Experience panel – center for viewing and playing multimedia files.
•Slideshow panel – slideshow of recently taken videos and photos.
•Microsoft Today panel – this panel is the actual Microsoft today screen.
•3D Fish panel – a panel that showcases the 3D features of the phone; a fish tank with 3D fishes.
•FM radio panel - a panel to access your FM radio straight.
•Google panel - provides access to all GOogle services.
•Customized panels can be offered.
and for me ... to avoid having a N95 as well as an HTC ...
3.2-megapixel camera and video call camera
There are two cameras. The main camera is 3.2 megapixel and includes Touch auto focus. A picture can be shared with friends or family, as a picture message or e-mail, or using any available transfer method, such as Bluetooth™. There is also a QCIF camera, for video calls, located on the front.
Photo light
When lighting conditions are poor, pictures can be enhanced by turning on the Photo light.
Video capture
The camera also records video and which are stored in the phone or on a memory card. A video clip can be shared with friends or family as a picture message or e-mail, or using any available transfer method, such as Bluetooth™. The phone supports VGA size video recording at up to 30 frames per second.
•MPEG-4: 30fps at VGA*
•H.263: 30fps at VGA*
•H.264: 15fps at VGA*
Can forward on to people if they want it ....
I do struggle that so many people are worried about WVGA. The G900 ran all the s/w I have without issues including Softmaker Office, CPL6, PI, FM, Pie+ etc ... WVGA is real extra screen estate rather than just VGA prettiness.
I know only time will tell, but this has to be leagues ahead of the Pro.
It is only the price that scares me ... and the fact that there are still performance issues with video at 30fps .... which as you can see from the above is a biggie for me.
The only daft thing missing I can see is the TV-Out ...
downloadtest82 said:
How does this accelerometer function work anyway?
Click to expand...
Click to collapse
These accelerometers actually measure the Earth's gravity also. It constantly measures the 1g with which the Earth is pulling the phone. A 3-axis accelerometer gives you the projection of the gravity vector on each axis (x, y, z). Assuming that the phone is only rotating (and not translating), it is easy to find to where the phone is facing... for example, if the x and y acceleration is ~0 and z is ~1, then the phone is facing up, like leaving it on a table top. If x=1, y=0, z=0 => phone in landscape. If x=0, y=1, z=0 => phone in portait mode.
When the phone is being translated (moving, that is) in a non-constant manner, a "dynamic" acceleration vector is added to the 1g Earth's vector. In that case, calculating the phone's position/rotation becomes more tricky and more erroneous...
downloadtest82 said:
i.e. "free fall" --> acceleration of 9.81m/s^2 = 1g
Click to expand...
Click to collapse
Actually, in free-fall, the acceleration is reported as zero.
Even ipod nanos come with accelerometers now. Don't sit well with me if the xperia doesn't.
Well, even the C905 and G705 have accelerometers, so why couldn't SE put one into their flagship
Pinguino1 said:
...the accelerometer word in mobile phones is a missnomer because I'm sure they have something simpler that I would call it "Balancerometer"
I believe it's just 2 or 3 tubular circles perpendicular to each other. These tiny tubes are filled with some kind of liquid The reading of the position of these liquid is enough to know the position of the device ex: Vertical, horizontal, diagonal at any angle of mesurement...
Click to expand...
Click to collapse
Years ago I used to think alot of debives measured that way, at one time it may have been like that but not now.
http://en.wikipedia.org/wiki/Piezoelectric_accelerometer
I have an RC Helicopter and a strong interest in electronics...so yeah, I just happen to know random stuff like this, lol.
They manufacture these in bulk as chips often...some even having 3+ (rotation) axi on the same chip.
Even at retail you can get the raw high-end chips for a couple bucks...imagine how much they cost in bulk.
hypest said:
Actually, in free-fall, the acceleration is reported as zero.
Click to expand...
Click to collapse
i suggest you to retake physics...
currently the accelerometer is just for user interface for phones, not too many uses
i couldnt find a thread that explains exactly what it was... is it hardware or software...
hardware. I think its a type of accelerometer.
my wife is also interested in this.
so my phone wouldnt have it then.. doesnt the camera have some kinda sensor like it in it?
your wife needs to get a diamond or touch pro...
andason said:
my wife is also interested in this.
Click to expand...
Click to collapse
gotvitamink said:
hardware. I think its a type of accelerometer.
Click to expand...
Click to collapse
As far as I know it IS an accelerometer. Same thing I would say. Don't have much knowledge, but it's basically the same technology the iPhone uses. It can detect how you're holding your phone. Yes, you could use your front camera on your phone as a accelerometer and it's been asked before, but no one attempted to do so since it would consume too much battery.
Kraize92 said:
As far as I know it IS an accelerometer. Same thing I would say. Don't have much knowledge, but it's basically the same technology the iPhone uses. It can detect how you're holding your phone. Yes, you could use your front camera on your phone as a accelerometer and it's been asked before, but no one attempted to do so since it would consume too much battery.
Click to expand...
Click to collapse
yea i wasn't really sure if it differed from an accelerometer. I used google and wikipedia and i couldn't find anything on G-sensor, and I didn't find G-sensor under the accelerometer wikipedia entry.
but yea, basically the technology that iPhone uses.
someone should do it...
its an accelerometer which is hardware to do what the iphone does where when u turn it to its side its screen also changes to the sideways orientation.
It detects which way the phone is facing and can detect acceleration in 3 axis.
petard said:
It detects which way the phone is facing and can detect acceleration in 3 axis.
Click to expand...
Click to collapse
Ah, there is the more technical answer. It can detect movement. Basically you use the 3 axis which detects movement in all directions. You tilt left and right and you tilt up and down. I knew that just didn't know the technical meaning lol.
In most cases the G-Sensor is simply a small metal ball laying in a tub with several contacts. When you turn or move your phone, the ball moves also, connecting some of these contacts to anothers. So the phone can figure out how you hold it (portrait or landscape, upside down etc.) and can switch the screen or perform different actions. Its called G-Sensor because the ball is driven by G-Force.
What is G-Sensor ?
A G sensor is usually an accelerometer. It measures the forces that act on it during changes in velocity. The wiki article below has more details.
Source(s):
http://en.wikipedia.org/wiki/Accelerometer
Dennis78 said:
In most cases the G-Sensor is simply a small metal ball laying in a tub with several contacts. When you turn or move your phone, the ball moves also, connecting some of these contacts to anothers. So the phone can figure out how you hold it (portrait or landscape, upside down etc.) and can switch the screen or perform different actions. Its called G-Sensor because the ball is driven by G-Force.
Click to expand...
Click to collapse
False. It's a three (and probably sometimes two) axis MEMS accelerometer - there are a few companies making those, but probably the most popular ones are analog devices' ADXL series. Similar device sits in wiimote (just as a secondary motion detection system, the more accurate one is camera+sensor bar).
Because these chips became really cheap recently, and are way more accurate, reliable, and robust than any mechanical sensors (in the same price ans size range), they're being shoved in every possible device You can find them in digital cameras (used to recognize if the photo is portrait or landscape and tag it accordingly), in hard drives (to detect mechanical shocks and protect the hdd by parking its head), in laptops (usually same as above plus to detect when the computer is falling down or other dangerous situations and protect the hard drives), in cell phones (you probably know this one's uses), in toys, portable media players, and lots of other stuff.
It detects which way the phone is facing and can detect acceleration in 3 axis.
Click to expand...
Click to collapse
A more precise answer is that it detects acceleration in three axes, and from these values phone's orientation can be calculated.
[MORE DETAILED EXPLANATION]
It's rather simple - when the phone is normally handled (it's not free falling and it's not being waved around), the dominant acceleration detected by the accelerometer is the gravitational acceleration (-9.81m/s^2 in vertical axis). So, if most of the time acceleration detected along the vertical axis of the phone is bigger than one detected along horizontal axis, the phone is being held in landscape position. If the situation is reversed, it's held in portrait orientation. If the acceleration is largest in the third axis (tangent to the screen), it means that the phone is being held nearly horizontally or it's lying on some surface - better not change screen orientation then
But as i said - it's only true when the dominant acceleration is the gravitational one - the sensor can't tell it from other sources of acceleration like waving the phone around. If you run one of the g-sensor games or demos and try quickly moving the phone around the desk (keeping it horizontal at all times), you'll see that the game will interpret this movement as tilting the phone.
[/MORE DETAILED EXPLANATION]
And by the way, why is this thread in development and hacking?
mr_deimos said:
False. It's a three (and probably sometimes two) axis MEMS accelerometer - there are a few companies making those, but probably the most popular ones are analog devices' ADXL series. Similar device sits in wiimote (just as a secondary motion detection system, the more accurate one is camera+sensor bar).
Because these chips became really cheap recently, and are way more accurate, reliable, and robust than any mechanical sensors (in the same price ans size range), they're being shoved in every possible device You can find them in digital cameras (used to recognize if the photo is portrait or landscape and tag it accordingly), in hard drives (to detect mechanical shocks and protect the hdd by parking its head), in laptops (usually same as above plus to detect when the computer is falling down or other dangerous situations and protect the hard drives), in cell phones (you probably know this one's uses), in toys, portable media players, and lots of other stuff.
A more precise answer is that it detects acceleration in three axes, and from these values phone's orientation can be calculated.
[MORE DETAILED EXPLANATION]
It's rather simple - when the phone is normally handled (it's not free falling and it's not being waved around), the dominant acceleration detected by the accelerometer is the gravitational acceleration (-9.81m/s^2 in vertical axis). So, if most of the time acceleration detected along the vertical axis of the phone is bigger than one detected along horizontal axis, the phone is being held in landscape position. If the situation is reversed, it's held in portrait orientation. If the acceleration is largest in the third axis (tangent to the screen), it means that the phone is being held nearly horizontally or it's lying on some surface - better not change screen orientation then
But as i said - it's only true when the dominant acceleration is the gravitational one - the sensor can't tell it from other sources of acceleration like waving the phone around. If you run one of the g-sensor games or demos and try quickly moving the phone around the desk (keeping it horizontal at all times), you'll see that the game will interpret this movement as tilting the phone.
[/MORE DETAILED EXPLANATION]
And by the way, why is this thread in development and hacking?
Click to expand...
Click to collapse
How do you know this surplus of information? Was it from an engineering school / article / books / or phone dissection? How do you know this?
None of these answers made much sense, so I did a google search, found the following:
http://www.dimensionengineering.com/accelerometers.htm
poetryrocksalot said:
How do you know this surplus of information? Was it from an engineering school / article / books / or phone dissection? How do you know this?
Click to expand...
Click to collapse
The theory of operation is actually pre-high school level stuff - basic physics (you know, Newton's laws, and theory of gravity)
And the details - caught some of these at the engineering university, some from accelerometer datasheets. I had to interface one of them to a programmable microcontroller a while ago so i needed to do some research on my own
I just got a TP2 and is a bit confused as to the working of the G-Sensor. I have calibrate it (and it is switched on), but nothing happens when I turn the phone sideways - ie turning to landscape mode. Am I missing something or need to activate it somewhere else?
Thanks
stoutseun said:
I just got a TP2 and is a bit confused as to the working of the G-Sensor. I have calibrate it (and it is switched on), but nothing happens when I turn the phone sideways - ie turning to landscape mode. Am I missing something or need to activate it somewhere else?
Thanks
Click to expand...
Click to collapse
Hello, try to search on your programs, you will have "G-Config", it allows you to define which applications rotate.
Thanks very much. I searched but couldn't find any G-Config anyware in All programs. Only reference is the G-Sensor in All settings\System.
EDIT: Google reveiled G-Config to be a self written app. (just downloaded) So it's not a HTC app included in the ROM?
Lol this might be a dumb question but ive been lookin around and no answer... my logic tells me its the same thing but my curiosity keeps askin is there any difference? soo with that said is there any difference?
G1 Specs
Processor Qualcomm® MSM7201A™, 528 MHz
Operating System Android™
Memory
ROM: 256 MB
RAM: 192 MB
Dimensions (LxWxT) 117.7 mm x 55.7 mm x 17.1 mm
(4.60 in x 2.16 in x 0.62 in)
Weight 158 grams (5.60 ounces) with battery
Display 3.2-inch TFT-LCD flat touch-sensitive screen with 320 x 480 (HVGA) resolution
Special Features Digital Compass, Motion Sensor
Touch HD Specs
Model HTC Touch HD™ T8282
Processor Qualcomm® MSM 7201A™ 528 MHz
Operating System Windows Mobile® 6.1 Professional
Memory
ROM: 512 MB
RAM: 288 MB
Dimensions 115 mm x 62.8 mm x 12 mm
(4.35 in x 2.5 in x 0.47 in)
Weight 146.4 grams (5.164 ounces) with battery
Display 3.8-inch TFT-LCD flat touch-sensitive screen with 480 x 800 WVGA resolution
Special Features FM Radio, G-Sensor
What is the difference?
G-sensor is a gyroscope, in other words an orientation sensor.
motion sensor is more accurate, it MAY or MAY not have G-sensor's capability, this depends on the software implementation. but the hardware itself is capable of detecting and reacting to all kinds of movement.
G-sensor needs _relatively_ sudden movements to activate the gyroscope (think of a marble in box), if the phones (the box) is in landscape, and you tilt it to portrait, the gryo detects it (ie marble rolls to one side). However, if you keep the phone/box's orientation the same, and move the phone closer or further from you (assumign you ar eholding the phone): now if you move it slowly, the marbles won't roll, this is g-sensor. becaue it can't detect this movement. but if you suddenly jerk the phone/box, even if the orientation is the same, the g-sensor should detect it (ie the marble will move). ummm.. just like those dice games on iphone/itouch (if you 've seen the latest itouch commercial).
motion sensor detects all kinds of movements, it's only up to the software to decide if all functionalities are implented or only "up till" the G-sensor capabilities are implemented or something else. best example, G1's compass view, slow movement with the phone in the same orientation will pan around the map.
that being said even the motion sensor has its limits, if you move the phone uber slowly, i bet it won't detect the motion, unless it's military grade (read: 007 gadget ), if that's the case, then i don't think the phone would be $179 either
buggybug0 said:
G-sensor is a gyroscope, in other words an orientation sensor.
motion sensor is more accurate, it MAY or MAY not have G-sensor's capability, this depends on the software implementation. but the hardware itself is capable of detecting and reacting to all kinds of movement.
G-sensor needs _relatively_ sudden movements to activate the gyroscope (think of a marble in box), if the phones (the box) is in landscape, and you tilt it to portrait, the gryo detects it (ie marble rolls to one side). However, if you keep the phone/box's orientation the same, and move the phone closer or further from you (assumign you ar eholding the phone): now if you move it slowly, the marbles won't roll, this is g-sensor. becaue it can't detect this movement. but if you suddenly jerk the phone/box, even if the orientation is the same, the g-sensor should detect it (ie the marble will move). ummm.. just like those dice games on iphone/itouch (if you 've seen the latest itouch commercial).
motion sensor detects all kinds of movements, it's only up to the software to decide if all functionalities are implented or only "up till" the G-sensor capabilities are implemented or something else. best example, G1's compass view, slow movement with the phone in the same orientation will pan around the map.
that being said even the motion sensor has its limits, if you move the phone uber slowly, i bet it won't detect the motion, unless it's military grade (read: 007 gadget ), if that's the case, then i don't think the phone would be $179 either
Click to expand...
Click to collapse
in other words motion sensor is better than the g sensor n that is super crack juice i was a lil worried there cause i thought g sensor would be better for some reason but thanks alot now i know something i didnt... thanks =)
In general, these are the same thing. They use a part called an Accelerometer, which measures acceleration, or the forces exerted on a mass within a chip. The force of gravity pulls it in a certain direction with 1G of force, so that's how things like the iphone can detect what orientation it's in, by looking for which direction gravity is.
By shaking the device or moving it, you also exert forces on the mass inside, and cause it to register different forces in different directions, which are reported to the OS in 3 axis.
Notebooks use the same tech to know when to park the heads. If the accelerometer suddenly sees that there is no gravity anymore, it assumes that it is moving towards the ground and will then park the heads of the drive to prevent damage.
"Motion Sensor" and "G Sensor" are the same thing, just showing that the chip can detect when it's being moved.
Correct, motion sensor and G sensor refer to the same device (accelerometer).
There is no difference apart from the name.
I have looked in every menu as far as I know, and I do not find the compass anywhere.
There are actually two "motion" sensors on the G1.
The first is the accelerometer, similar to the iPhone. It detects motion by changes in gravity on three axes. This does not mean the phone has to make big movements to detect anything. The force of gravity is, in part, determined by the distance between two objects, so the phone does not have to move for the sensor to get a reading.
The second is a digital compass, I think that there's a Nokia that has one but the iPhone does not. This, as the name implies, reads the earth's magnetic field and determines which way the phone is pointing.
I'm working on an app that will use both of these to allow the user to examine a virtual 3D object.
Actually I finally found it. It is not called 'compass mode' as advertised. You go into maps - then street view. It will say searching I think .. then you touch the spot it tells you to and there you are .. walking down the street. I don't know how often the pictures are refreshed, but must be fairly recent because I can see that I need to get my lawn mowed !!! of course .. it seems I always need to do that with all the rain here in florida, but I would rather play with my toys.
theonlynickleft said:
Actually I finally found it. It is not called 'compass mode' as advertised. You go into maps - then street view. It will say searching I think .. then you touch the spot it tells you to and there you are .. walking down the street. I don't know how often the pictures are refreshed, but must be fairly recent because I can see that I need to get my lawn mowed !!! of course .. it seems I always need to do that with all the rain here in florida, but I would rather play with my toys.
Click to expand...
Click to collapse
Why you are in that screen hit menu and compass mode is in the bottom lower right corner and will react to your movements.
Thanks ... fouund it!
I'm trying to develop a proof of concept product, but I'm having a hard time finding some of the materials I need to get the project started. The main thing I need is a large(1ft by 1ft, or 2ft by 2ft) clear capacitive screen with a matrix of LED's attached to the underside of the screen. I want the LED's to be able to glow three different colors, preferable Red, Yellow, and Green.
I don't want to get into the details too much at this point, but the overall objective is to have a flat, clear surface that can detect the weight(force) exerted by an object along with it's footprint, and then assign a certain color 'halo' around that object based off criteria that will have to be programmed into microprocessor somewhere along the way.
Does anyone know of a company that sells the kind of Tech I'm looking for?
beebop483 said:
I'm trying to develop a proof of concept product, but I'm having a hard time finding some of the materials I need to get the project started. The main thing I need is a large(1ft by 1ft, or 2ft by 2ft) clear capacitive screen with a matrix of LED's attached to the underside of the screen. I want the LED's to be able to glow three different colors, preferable Red, Yellow, and Green.
I don't want to get into the details too much at this point, but the overall objective is to have a flat, clear surface that can detect the weight(force) exerted by an object along with it's footprint, and then assign a certain color 'halo' around that object based off criteria that will have to be programmed into microprocessor somewhere along the way.
Does anyone know of a company that sells the kind of Tech I'm looking for?
Click to expand...
Click to collapse
Capacitive touchscreens don't detect weight/force, and will also not detect nonconductive objects (humans are partly conductive)... Sure you don't mean resistive?
Some of what you describe sounds VERY similar to how FTIR touch sensing (Microsoft Surface, etc.) works, which senses contact and not conductivity or force. Maybe use infrared LEDs to provide baseline contact detection and control the visible LEDs?
Rgb led array( like those in adv boards). Along with ir / laser net just above the surface( much better than resistive touch panels) will do the trick. I think u want to make interactive walls(like fancy walls in disco clubs, in which leds light up in the shape of object that is in front of it). Or there is another way, use a cam to detect the object, convert it to corresponding electric signals to light up rgb led array/wall.
HPD V10( WITH EXTREME MODS) ON FIKERT r.2.16+ .
You can get a display and then add your own hardware to that using gpios or IOIO or ADK.
I did something similar
Well if you look at sites like Newark.com you can find some of these components. I played around with some of these but never to actual practical use.
Dear all,
This is my final year project, I got to be honest, mobile development is new to me (I'm mostly experienced with C programming on MCUs) but I want to learn and develop my skills in this field.
I want to develop a Vibration Analysis application. I want to use it to measure the vibration in an Elevator so one can analyze the riding comfort.
First, the phone will be put on the flooring in the middle of the cabin, the measurement should be along the Elevator's total travel (up to 1min ride) and at least following to 2 axis (X and Y, if I can measure following Z too, it will be great). Once those data are captured during this 1min, I want to plot them on a separate graphs (first graph: X position vs time, second graph: Y position vs time). Also, I might add the feature of measuring the elevator speed while traveling inside the cabin.
My questions are:
1- Can I get the data that I want only from the accelerometer? or I should use the gyroscope and the digital campus as well?
2- Can the accelerometer (on Samsung Note 2 for example) detect small vibrations? like ones that occurs in an elevator (around 15 m-g)
I want to know how hard can this project be, and if it's feasible or not. Any help will be much appreciated.
Many Thanks
I would try and look into the linear accelerometer. i'm not too familiar with how it works but you should look into this:
developer.android.com/guide/topics/sensors/sensors_motion.html
@Anubarak
An accelrometer can detect motion in x ,y and z axis on an average most accelrometers can pick vibrations of amplitude 0.1 - 1 Milli meters
more over you can't possibly detect vibrations with a gyroscope or a compass
So you will have to rely on the Accelerometer !
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