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iPhone scale application?

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BUMMMMMMMMMMPPPPPPPPPPPPPP!!! anything new going on wit this??? i want to see a more legit scale than the iscale... which only weighs 5 grams?? :confused: nothing more, nothing less... plus it doesnt work for Iphone 2.x..... BS!!!!!!!! I WANT YOUR APP! make it exclusively for jail breaking too, screw Apple... please email with any updates! its a must! thank you!
 
I know how this could work (but not well...)

If you use the phone as a balance scale, i.e. use the accelerometer instead of touch to measure change in weight. You would have to balance it on your finger or something, exactly in the middle of the phone and then see how much whatever you are weighing tilts the phone. I have a feeling this is the curve he was talking about, accelerometer tilt to weight displacement. If so, it would be a terrible app and really annoying to use.
 
crandel said:
If you use the phone as a balance scale, i.e. use the accelerometer instead of touch to measure change in weight. You would have to balance it on your finger or something, exactly in the middle of the phone and then see how much whatever you are weighing tilts the phone. I have a feeling this is the curve he was talking about, accelerometer tilt to weight displacement. If so, it would be a terrible app and really annoying to use.
Click to expand...

This already exist.... The Iscale... Iphonescale.com check it. it only works for 1.x firmware, so im already SOL. but from the video i saw it was accurate, but it only weighed up to and nothing under 5 grams... so its not that tight. i would build a leveler for it instead of my finger. its still worth it...
 
ser0pro said:
This already exist.... The Iscale... Iphonescale.com check it. it only works for 1.x firmware, so im already SOL. but from the video i saw it was accurate, but it only weighed up to and nothing under 5 grams... so its not that tight. i would build a leveler for it instead of my finger. its still worth it...
Click to expand...

Damn is that dumb.

balancing the iPhone on your finger then using the tilt as the "scale"? aaahhh hahahahha
 
umm it has already been said, the iPhone does NOT have a pressure sensitive screen. That is why it does not work with gloves on. The iPhone screen uses capacitive technology.

"Capacitive
A capacitive touchscreen panel is coated with a material, typically indium tin oxide, that conducts a continuous electrical current across the sensor.[3][4] The sensor therefore exhibits a precisely controlled field of stored electrons in both the horizontal and vertical axes - it achieves capacitance. The human body is also an electrical device which has stored electrons and therefore also exhibits capacitance. Capacitive sensors work based on proximity, and do not have to be directly touched to be triggered. It is a durable technology that is used in a wide range of applications including point-of-sale systems, industrial controls, and public information kiosks. It has a higher clarity than Resistive technology, but it only responds to finger contact and will not work with a gloved hand or pen stylus unless the stylus is conductive and transmits the user's capacitance. Capacitive touch screens can also support Multitouch. Examples include Apple Inc.'s iPhone and iPod touch, and HTC's T-Mobile G1."

http://en.wikipedia.org/wiki/Touchscreen
 
Show me where in the specs where you read that the iPhone has a "pressure-sensitive" screen. It does not have a pressure sensitive screen. It has a touch sensitive screen.

I bet you're one of those people at Wal-Mart that presses really hard on the "Credit" option when you pay with your card on their machine and cuss at it when you don't know why it doesn't respond. Touch sensitive...not pressure sensitive buddy.

Don't blame the machine. Blame the user.
 
Then there'd be tons of posts "Help! I was using the scale application and stood on my phone to see how much I weigh and broke it" :(
 
iPhone Savvy said:
I think it could work, just have something on screen, such as a giant touch button, that measures the pressure being applied to the touch portion under the glass. ;)
Click to expand...

I don't think the iPhone measures pressure at all - as has been said several times in this thread, although I can't say I know for sure...
 
iScale

OK...I can now tell you the method.

The method was to measure the z-component of the accelerometer while the vibrator was running.

This gave a curve that could be characterized according to how much weight was placed on the device.

It works well between 3-5 pounds, but is useless below that.

Everyone wants grams and ounces...not feasible with this method.
 
questrillion said:
OK...I can now tell you the method.

The method was to measure the z-component of the accelerometer while the vibrator was running.

This gave a curve that could be characterized according to how much weight was placed on the device.

It works well between 3-5 pounds, but is useless below that.

Everyone wants grams and ounces...not feasible with this method.
Click to expand...

That actually sounds like a pretty ingenious solution, but I doubt it would be very accurate. I hope you didn't spend too much time developing the program.
 
Crank Lucas said:
no really Im wondering now I mean the touch screen is pressure sensative, so how hard would it take to have a application (lets call it iScale:)) that can measure whatever you put on it in grams?

you know, just to measure some small materials ;)

so waddaya think?
Click to expand...

why in grams??
this sounds like you're buying drugs
 
questrillion said:
OK...I can now tell you the method.

The method was to measure the z-component of the accelerometer while the vibrator was running.

This gave a curve that could be characterized according to how much weight was placed on the device.

It works well between 3-5 pounds, but is useless below that.

Everyone wants grams and ounces...not feasible with this method.
Click to expand...

I can't really think of many 3 - 5 pound objects I would be needing to weigh...

Very cool concept though.
 
actually this concept is so flawed it would never work


a) only hard, stable surfaces would work
b) these motors are not calibrated
c) this would kill your battery pretty quickly
 
But he's not talking about using the touch screen ... There's no way that would work since the touch screen deals with electrical conductivity and not pressure ... He's talking about using the accelerometer.
 
xbuddycorex said:
But he's not talking about using the touch screen ... There's no way that would work since the touch screen deals with electrical conductivity and not pressure ... He's talking about using the accelerometer.
Click to expand...

It's an interesting concept. A good set of scales should have a standard weight or two. You could calibrate the vibrate if you looked at it and found it was consistent.

Maybe you'd need to have the iphone in a solid case, which could have the to be weight material added, and the measure how much the iPhone moves on a plumb line.
 
If you developed an iPhone app that could measure weight to .00000000001 accuracy, I'd never use it. Why would I risk putting heavy objects on a $300 phone when there are dedicated scales available for $10.
 
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