![](https://spgrn.com/api/v3/image_proxy?url=https%3A%2F%2Flemmy.blahaj.zone%2Fpictrs%2Fimage%2Fa5bd6ec8-659b-43a4-8945-99b6f677f1f0.jpeg)
![](https://spgrn.com/api/v3/image_proxy?url=https%3A%2F%2Ffry.gs%2Fpictrs%2Fimage%2Fc6832070-8625-4688-b9e5-5d519541e092.png)
681·
11 months agoThe first version was actually patented, so we know how that one worked fully. The latest versions are secretive but they still likely measure the same thing.
https://www.cs.cmu.edu/~dst/Secrets/E-Meter/hubbard-patent.html
The first version was actually patented, so we know how that one worked fully. The latest versions are secretive but they still likely measure the same thing.
https://www.cs.cmu.edu/~dst/Secrets/E-Meter/hubbard-patent.html
Just 1h?
Amateur