Digital Scale App

[taz707]

Hi,
I Would love to see a Digital Scale App , My Family owns a jewelry store and it would be convenient to weigh jewelry and gold on my android. If it is possible ? or anyone can do it let me know willing to pay ,greatly appreciated thanks .

[deserttopping]

what hardware sensor would register weight? don't think this is possible w/o hooking a sensor to the usb, plus you'd need an app.

[Iceberg]

I think there has been an app that tried to do that, but it didn't get good reviews and I wouldn't buy jewelry from you if you were weighing it on your phone, less it was a chunk of gold and I know the g1 would weigh it less than what it was

[DesignDawg]

This has been brought up before. People seem to think that there's pressure sensitivity on the screen that could be measured and translated to weight. Definitely not the case. The screen on all Android phones currently out are capacitive, and don't measure pressure--much less "touch"--at all. They measure electricity, to overly-simplify it. This is why your screen will not work with a stylus, or a pencil, or even your fingernail. It's designed to register the electrostatic distortion specifically caused by your flesh.

There's no way this could be translated to weight. For that matter, the other major touchscreen tech, resistive, works on the same principle, but by physically pressing two conductive surfaces together. Both technologies can be utilized to give some sense of pressure sensitivity by basically determining how big of a "fingerprint" you are making. the harder you press, the bigger the area being "activated" on the screen. But it's all relative. You couldn't possibly use it to measure anything with an absolute value. For example, someone with a very skinny, pointy finger may not be able to make near as big a "fingerprint" as someone with a very flat, fat finger, no matter how hard they press. And what about someone putting their palm on the screen? That large area would require no pressure at all to seem far, far heavier to such a system.

So, no. No digital scale is coming soon to these phones. I'd suggest dropping the subject if you don't want to be accused of being a drug dealer like everyone else who has brought it up.

[Iceberg]

@DesignDawg you PWN!

[kellypawlak]

Design dawg, since you like making people with innocent questions look like *******s, let me do the same for you.
Smart phones like the Iphone and android phones have more than touch sensors... they also have acceloremeters. Oh and what could you do with this fantastically accurate device? Well for one you could balance a phone half off of a flat surface and calibrate It's position as zero, then place the mass In question on the other side of the phone and translate the degree of elevation into a mass (which would be negligible to the eye but it would show up substantial in the readings).

But nice try. You aren't as smart as you think.
and if you doubt my method its already been done. Google it.

Forgive my typos I'm on my phone

[constellanation]

Design dawg, since you like making people with innocent questions look like *******s, let me do the same for you.
Smart phones like the Iphone and android phones have more than touch sensors... they also have acceloremeters. Oh and what could you do with this fantastically accurate device? Well for one you could balance a phone half off of a flat surface and calibrate It's position as zero, then place the mass In question on the other side of the phone and translate the degree of elevation into a mass (which would be negligible to the eye but it would show up substantial in the readings).

But nice try. You aren't as smart as you think.
and if you doubt my method its already been done. Google it.

Forgive my typos I'm on my phone

really this is how you make your first post, by attacking a three month old post, which is rather thought out, well said and in all respects the truth, yet not attacking but only answering the original posters question?

as for your response, even if it is plausible, it would require additional hardware and could not be done simply by an app...

[kellypawlak]

Don't start with me. You came at this person for no reason. And I'm not the type to be on forums I just wanted to clarify the problem here and fix your ego.

Don't tell me it needs more hardware when its been done. Sounds like you just can't handle being wrong.

[Iceberg]

Don't start with me. You came at this person for no reason. And I'm not the type to be on forums I just wanted to clarify the problem here and fix your ego.

Don't tell me it needs more hardware when its been done. Sounds like you just can't handle being wrong.

Shut the hell up let's see that accelerometer calculate how crooked your head will be when I kick it off your neck. Don't start with anyone here especially constellanation.


If you were in a profession that needed scales and measuring devices the last thing you would want is your phone to do it.

Maybe you're autistic and are very passionate about the limitless abilities of science and technology, but there's no way I'll let you get away with anything talking in the manner you are.

[f4phantomii]

From a purely engineering perspective, using the accel sensors wouldn't be my first hope. The OP was talking of trying to measure something that likely weighs a fraction of the total phone weight.

While the accel sensors *might* have the precision needed, I would *not* want to be the one that had to precisely balance the phone itself on a fulcrum as necessary to get any kind of accurate weight measurement based on the angle. I would imagine there are variations in the battery weights alone that would make this nearly impossible.

For jewelry, assuming it is metallic, perhaps one could use the magnetometer? If it's stones....yikes! I agree with DesignDawg.....highly impractical.