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

github.com

31–40 of 156 posts

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

#31
post #16

Earlier quoted context omitted.

Can’t you get capacitance with a wet sponge? Like your typical dish cellulose sponge. You could make a small platform?

I remember drawing on my old iPad back in the day by shoving a wet q-tip into a BIC pen and using it as a stylus. I am sure something similar could be rigged here

I've used carrots and cucumbers as a capacitive stylus while wearing gloves.

It's the reason why I love Note and S Ultra phones - the stylus. I'm using it now.

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

#32
post #14

Apparantely on safari there's touch strength so this should be possible to make for the web too, cool

Somebody could use this as a starting point. http://touchscale.co/ You'd have to collect new data on touch strength vs. weight to get the regression parameters.

(If you do this, let me know and I can add it to the site above, and then we can both delight in the surprisingly large amount of unmonetizable traffic it gets.)

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

#33
post #24

This reminds me of how, twenty years ago, I used the PowerBook’s hard drive vibration sensor to rig up a seismograph to measure construction noise: https://allthegooddomainsweretaken.justinmiller.io/2007/04/0...

Reminds me of the people who used their ThinkPad's vibration sensor to detect smacks on the machine, and rigged their X window manager to switch virtual desktops when smacked from the appropriate side, panning right when smacked on the left, and left when smacked on the right.

Oh, I vaguely remember someone hacking that for some sort of windowing back then on OS X!

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

#34
post #24

Earlier quoted context omitted.

Reminds me of the people who used their ThinkPad's vibration sensor to detect smacks on the machine, and rigged their X window manager to switch virtual desktops when smacked from the appropriate side, panning right when smacked on the left, and left when smacked on the right.

Oh, I vaguely remember someone hacking that for some sort of windowing back then on OS X!

The smackbook pro! https://www.youtube.com/watch?v=6uvQTTPr9Rw

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

#35

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?

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

#36

This reminds me of how, twenty years ago, I used the PowerBook’s hard drive vibration sensor to rig up a seismograph to measure construction noise: https://allthegooddomainsweretaken.justinmiller.io/2007/04/0...

I heard that IBM decided to move out of this building [1] because vibration due to the construction of the tower across the street kept destroying hard drives in their computing center. [1] https://en.wikipedia.org/wiki/330_North_Wabash

Obligatory link to Brendan Gregg shouting at hard drives: https://www.youtube.com/watch?v=tDacjrSCeq4.

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

#38
post #34

Earlier quoted context omitted.

Oh, I vaguely remember someone hacking that for some sort of windowing back then on OS X!

The smackbook pro! https://www.youtube.com/watch?v=6uvQTTPr9Rw

What a great name

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

#39
post #3

There used to be iPhone apps that did something similar - https://www.theverge.com/2015/10/28/9625340/iphone-6s-gravit...

My memory was that the weight API was made private because they didn’t want people using iPhones for drug deals.

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

#40

Earlier quoted context omitted.

I remember drawing on my old iPad back in the day by shoving a wet q-tip into a BIC pen and using it as a stylus. I am sure something similar could be rigged here

I've used carrots and cucumbers as a capacitive stylus while wearing gloves. It's the reason why I love Note and S Ultra phones - the stylus. I'm using it now.

The recipe was on your phone/tablet and there was no way you were taking your gloves off?
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