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TrackWeight: Turn your MacBook's trackpad into a digital weighing scale

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Re: TrackWeight: Turn your MacBook's trackpad into a digital weighing scale

#77
post #70

Very cool, but I'd still probably just buy a cheap digital scale.

One less thing to carry.

I used to travel with one of these[0].

[0] https://en.m.wikipedia.org/wiki/Macintosh_Portable

Re: TrackWeight: Turn your MacBook's trackpad into a digital weighing scale

#78
post #17

I think this is neat, but only in a Rube Goldberg machine sort of way. The instructions are: 1. Open the scale 2. Rest your finger on the trackpad 3. While mainting finger contact, put your object on the trackpad 4. Try and put as little pressure on the trackpad while still maintaining contact. This is the weight of your object That is, the pressure sensors only work if it detects capacitance, so you need to be touch…

Could a small piece of conductive foam or some cleverly layered tin foil+paper work? So put the object on the shim (which has a known or even negligeable weight)

I once put some aluminum duct tape completely over the touch pad of an old laptop to see what would happen. Turns out it induced enough "eddy currents" to make the mouse move around the screen without me touching it--in a way, visualizing the currents!

I connected the foil to ground using a small strip of the tape to the ground metal of a USB port on the side and it disabled the touch pad.

Re: TrackWeight: Turn your MacBook's trackpad into a digital weighing scale

#79

I think this is neat, but only in a Rube Goldberg machine sort of way. The instructions are: 1. Open the scale 2. Rest your finger on the trackpad 3. While mainting finger contact, put your object on the trackpad 4. Try and put as little pressure on the trackpad while still maintaining contact. This is the weight of your object That is, the pressure sensors only work if it detects capacitance, so you need to be touch…

Could you accurately weigh a hot dog?

No, only cool ones.
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