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That's awesome. You can make a scale another way too, by using the barometer in the iPhone. You will need a ziplock or other airtight clear plastic bag, and an
by cryptoz 11y ago
That's awesome. You can make a scale another way too, by using the barometer in the iPhone. You will need a ziplock or other airtight clear plastic bag, and an object of known weight for calibration.
You can measure the change in air pressure in the bag with your iPhone inside, and put your object to weigh on top of the bag (carefully balanced). There is a linear relationship between the rise in air pressure and the weight of the object on the bag (I tried this and it does work)
- userbinator 11y agoNote that the bag must be extremely flexible for that to work. Otherwise the weight will be supported by the bag and the air pressure inside will be lower. For some reason, that reminds me of the classic "measure the height of a building using a barometer" joke.
- deleted 11y ago[deleted]
- toxicFork 11y agoIf you put a very light balloon in there won't the air pressure increase more than a smaller but heavier apple?