201–210 of 218 posts
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Because "they" have more influence in politics than the user.
Ah yes, the political conspiracies of “Big Scales”.
What I wrote sounded more conspiratorial than I am planned, but I stand by the opinion that coperate interests are overrepresented in regulations.
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I would buy a couple of these in an instant, it's exactly what I want, except it's so BIG. I want something as small as reasonably possible.
We originally designed a smaller monitor but it makes it very difficult to get an accurate temperature reading because the enclosure heats up and you cannot have a good distance from the active components to the temperature sensor.
I'm happy with that, and I will place an order.
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Easy solution though, just limit the scale's display to a magnitude that it can accurately measure reproducible.
Easy solution if your customer understands accuracy. They don't. They want the highest resolution so they can see their 10 gram progress when dieting. But they want the measurement to be stable enough to not cause them too much anxiety.
Do they? 100g is already quite granular, and you can lose that in a day.
I have two scales which are giving me different measures - I've been weighting myself and assume I'm in the middle of both. It's a bit annoying, but works for my goals.
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That should be outright illegal... Why do they allow equipment that deliberately lies to the user?
I'm not actually sure now you mention it; it used to be a serious crime to mess with weights and scales, when they were used for weighing coins. Probably still is.
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No, they lie to cover up the cheapness and inadequacy of their flextures. "Users can't handle the truth" is a bullshit excuse and you should be ashamed for making it.
Whoah there: Your typical (cheap) consumer scale will have four (50kg) load cells hooked up to an hx711 (or clone) and the cheapest microcontroller the manufacturer could find that can drive an LCD directly. Even the cheapest load cell is pretty damned accurate and the average between the four of them is going to be accurate within 0.1kg (~0.22lbs). Having said that, load cells have this problem where their values dr…
My cat sat on it, read 9.4lb. I stood on it, it gave my weight, then I picked up my cat and it read (my weight + 9.4)lb.
I was impressed!
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The state of the art for reasonably priced CO2 monitors seems to be that they hard code in the "ambient" Co2 level and instructions tell you to let it sit outside every once in a while. The the sensor adjusts can adjust it's baseline accordingly , assuming that the lowest CO2 level it's seen in the last week or so is equivalent to the "ambient" outside level. Ofc this is susceptible to issues and can require even mor…
Here we are talking about 1-2 ppm accuracies. I don't need more than 100ppm accuracy from my CO2 monitor. Hell, just show me one of 4 values: 400, 600, 800 and 1000+ but don't lie.
My Aranet4 was more like 1000 ppm off before putting it outside for awhile, despite being labeled as calibrated from the factory. It was going absolutely ballistic thinking my apartment was full of smog. After sitting outside to get a taste of ambient air, suddenly the inside of my apartment was fine.
There are CO2 sensors on AliExpress for less than $10, they are scams. What they do is that they take the cheapest sensor available that reacts to something in the air, and extrapolate a reading. It may give you an indication that the air is "stuffy", but the numbers are completely made up.
My three AirGradient DIY units are going strong. They seem very accurate -- strongly correlating with nearby weather stations and online services. Definitely nice to have high-granularity/accuracy details both indoors and outdoors. It's also really interesting to see different "trends" and how different weather conditions correlate with (and/or affect) air quality!
Are there online co2 measurements from weather stations? I couldn't find any for Sweden
Author here. I wrote this article a few weeks ago after discovering that a well known air quality monitor in the market that retails for more than USD 1000 actually uses a PM module that costs less than USD 20. Often people assume that the more expensive, the better but as you can see in the article this is often not the case -especially when it comes to the accuracy of the monitor. If you are looking for an open sou…
The same is true of digital bathroom scales. In fact almost all consumer grade digital scales have “fake accuracy” built into the firmware that ensures the same exact weight shows up when you step on the scale twice in a row, even if you pick up e.g a quarter-pound weight in your hand the second time
I say that because it seems like certain tenths of a pound are outright impossible to achieve.
Author here. I wrote this article a few weeks ago after discovering that a well known air quality monitor in the market that retails for more than USD 1000 actually uses a PM module that costs less than USD 20. Often people assume that the more expensive, the better but as you can see in the article this is often not the case -especially when it comes to the accuracy of the monitor. If you are looking for an open sou…