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OpenERV

@openerv

I've designed and am trying to mass produce fans for cr-box style air purifiers, which are far far quieter for greater airflow than the usual box fans. About 10% more flow for 1/220 the noise energy (24 db). Www.bigquietfan.com

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22.10.2024
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Latest posts by OpenERV @openerv

What baffles me is that even people with considerable engineering experience seem to do this. I think it's more in line with human psychology in general to be honest. Perhaps a sort of context window limitation. We just tend to forget/suppress the memory of how messy things are :'(

25.02.2026 18:40 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

The only thing that remains is to test the final version of the motor driver board and finalize the firmware on it. Due to the holiday in China that's going to take until about March 10. Then things will be totally done as they can be. The cr box foundation is also doing testing feb 26.

25.02.2026 18:33 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I think what's happening is that people get a bit mentally lazy. They allow the costs to expand to meet the size of their container, and laziness to expand in like manner. Large challenges are treated in a manner very similar to small ones when this doesn't really make sense.

25.02.2026 18:30 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

To be honest it's very frustrating how everyone I try to collaborate with seems to think things are going to be easy, then they never are and I have to hold everyone's hand and guide everything and remind them I told them that way back and they didn't listen...

25.02.2026 18:30 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 3 ๐Ÿ“Œ 0

It's time to announce the mechanical side of the big quiet fan is as done as I can make it. There are often chances that are needed as things go to production but since the molding guys etc don't want to just talk about it and solve things ahead of time, we will just have to barrel ahead.

25.02.2026 18:30 ๐Ÿ‘ 6 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

The norms around ownership are clearly part of the problem. But we don't question that, oh no. If someone owns something, well that's that, doesn't matter how they got it, what they are doing with it etc.

22.02.2026 22:41 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Someone robs you every day for a whole year and all you settle for is a refund?

21.02.2026 20:02 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

No, you need to get those people out of power. Stop hiding from the real work.

20.02.2026 17:44 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Uh so you are going to just rev up the immune system permanently? Clearly that's likely to have serious downsides. An overactive immune system is exactly the main problem with many long COVID situations. Iirc. The system will also get exhausted etc?

20.02.2026 17:42 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Man the big quiet fan is pretty much done now but I'm waiting on other people mostly. Just gotta get it produced now. Everything is so slow.

18.02.2026 19:32 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Why don't we make a meta tool to integrate all such wisdom so we can have something we can just ask to do X and it actually does it?

17.02.2026 20:16 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

The thing is, when will someone make a meta tool that harnesses all these tools using wisdom like this? When they do, we will be back to that prompt except it will do a better job on larger tasks with smaller prompts.

17.02.2026 20:15 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

So if we suppose 38.3 thousands people, that's a million dollars per person? Yes. Have we all forgotten how to do math???

17.02.2026 20:01 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I'm pretty sure you could get away with a filter on the intake. I would expect whatever goes in comes out. The resistance to airflow at the intake is not a big deal, the pump is very powerful and will not notice. I see no reason it would fuck up the machine unless they did a really trash design

17.02.2026 19:51 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

They claimed to be from pratt and whitney, but were using a clearly bs Gmail address. They cannot spoof a fake address very well. They can't have the right domain name to make that part convincing. We need some way to stem the tide of fraud.

17.02.2026 19:48 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Someone tried to scam me just yesterday. It looked like they had a bot of some kind reading websites and sending emails to lure you into something. I blocked them immediately. Their email addy was shit. Thing is the email addy they cannot have for cheap. Tokens they can.

17.02.2026 19:46 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

What's your input and output solution? I.e. keyboard and mouse plus head mounted display, I guess. I think there is a ton of potential to improve these. It's nuts to be chained to a certain bodily position so much of the day.

17.02.2026 19:44 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I would prefer to roll it together with other reforms that improve things across the board, including taxation. This may involve raising taxes on some regular people in some ways, but usually reducing them and taxing rich people more. I don't think it's best to frame the issue as us needing to pay

17.02.2026 19:41 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

That's more like market research than engineering though. Also again they literally do not know. My personal solution is to use rational economics as a guide, however you could easily starve like that. You cannot predict behavior of humans that well.

16.02.2026 17:37 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 2 ๐Ÿ“Œ 0

There was open source ecology, and look what happened to it. This explains why we do not have them now.

16.02.2026 17:35 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

I'm with you. Collapsing things to blame on the individual is exactly what the ruling class wants. There is an excellent article in the palestine issue of Science for the people magazine discussing this. However we all do have a bit of lattitude, it sounds like you do use that. It does add up.

16.02.2026 17:35 ๐Ÿ‘ 4 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

To be fair, people generally do not know what they want. Even if you ask them, they will not tell you what they really want. If you make what they want they will squirm out and not buy it most of the time.

16.02.2026 17:32 ๐Ÿ‘ 5 ๐Ÿ” 0 ๐Ÿ’ฌ 1 ๐Ÿ“Œ 0

Someone should tell the boss that, though. The respectable kind of engineering is like that. Unfortunately we are usually coerced into being a cog in a giant scheme to extract money from people. And to survielle and control them. Or even kill.

16.02.2026 17:30 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

Technological progress! I no longer like caffeine though. Looking back, I've consumed a great deal and it's not clear it gave net benefit. The downsides are quite harsh and generally underappreciated :(.

12.02.2026 20:37 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

According to Wired, ICE has leased space in Southfield, Mi. The feds are being all hush hush about it. Maybe we should throw a welcome party for them, complete with whistles.
WIRED
CITY
Southfield
STATE
Michigan
ADDRESS
One Towne Square

12.02.2026 14:21 ๐Ÿ‘ 2 ๐Ÿ” 2 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

There is a book entitled happiness:a guide to life's most important skill. Sounds like bs but the guy's actually a former biologist. It discusses similar phenomena and offers some good ideas on how to do better, with modern psychology/neurology knowledge and Buddhist wisdom.

12.02.2026 20:31 ๐Ÿ‘ 1 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

It also improves reliability. If things can be repaired independently, it removes the incentive to use planned obsolescence, so things will be better designed from the get go. Repairability also tends to go hand in hand with compatibility.

11.02.2026 18:17 ๐Ÿ‘ 0 ๐Ÿ” 1 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0
Post image

Repair Manifesto: If we can't fix it, we don't own it.
- Repair is better than recycling.
- Repair saves us money.
- Repair teaches basic engineering.
- Repair saves the planet.
- Repair connects people and things.
- Repair is sustainable.
#Minimalism

10.02.2026 21:17 ๐Ÿ‘ 2804 ๐Ÿ” 875 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 71

What a profoundly foolish effort to try to hide from the whole world in silly boxes. You cannot escape drought, famine, war, hurricanes, fascism, by hiding in a box.

11.02.2026 17:57 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0

As someone who designs energy recovery ventilators and air purifiers, this is absurd. You can't hide from the whole world in your silly box. The fossil fuel taps must be turned off. Nothing else will work. It's foolish to put your chips in that basket.

11.02.2026 17:56 ๐Ÿ‘ 0 ๐Ÿ” 0 ๐Ÿ’ฌ 0 ๐Ÿ“Œ 0