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unknown2895 commented on a post in r/SubredditDrama
dimechimes 6 points

Gotta admit, I found the image more disconcerting than wondrous. But I get that some people find that stuff neat. Telling an engineer to reconsider their perspective is as futile as pushing a rope.

unknown2895 2 points

Well it's the engineers themselves who know the true extent of harm caused by these machines. It's literally part of their job. As somebody already said there

Dave, did someone shit in your cornflakes today? I doubt anyone here >argues about the horrible effects the fossil fuel industry has on our lovely >planet, but this subreddit is about the engineering feat of establishing the >oil terminal in those conditions. Apparently, you can't keep those two things >apart.

Draqur -9 points

Means the product is shit 99/100 times.

Maybe this is the 1 time they talk about.

unknown2895 2 points

This is a $2 million+ dollar watch. So I am pretty sure this product was never "shit"

SirLasberry -2 points

Is this engineering? The product seems completely useless.

unknown2895 5 points

Usefulness is irrelevant to whether or not its engineering or not. It involves engineering practices and creating something according to given specifications and goals. Hence, it's engineering.

Is it useful? that's philosophy not engineering.

corporate-viking 2 points

I've read a number of wild papers about potential means of terraforming Venus, namely through the complete physical removal of its atmosphere and speeding up its rotation via mostly blasting the shit out of it until all its noxious gases fly into space and its rotational period is altered to a day/night cycle more similar to that of Earth; it's a lot of trouble but Venus at least has a gravitational pull similar to Earth, so it may be more anatomically appealing in the long run

unknown2895 2 points

I can see how the physics can work out but I can't see how engineering will work out

ImAnIronmanBtw 1 point

is the podcast good?

unknown2895 2 points

Yup. It's really good. It's nice to hear from scientists who are actually doing research on things like this

There's also Houston we have a podcast from NASA Johnson space centre which is also pretty good

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unknown2895 commented on a post in r/batteries
unknown2895 3 points

I don't think a quick test will hurt. Just keep checking the voltages with a multimeter to ensure safety. Here's a graph of life cycle of Li-ion cells after being charged to voltages different from 4.2V. You can easily see why BMS is important for cycle life:

Source for the graph:

outplay-nation 1 point

what if there is no way for me to check the voltages with a multimeter( battery inside a fuselage). Is there any thing else I can do to ensure safety?

unknown2895 1 point

If it's a standard Li-ion charger, I think it would be fine for one time. So, IMO, you can go ahead and do your test.

unknown2895 commented on a post in r/AskEngineers
unknown2895 9 points

Sounds like Mechanical engineering. I mean, it literally has mechanical in the name. And since it's pretty broad in terms of scope ( jack of all trades but master of none), you can easily transition into something else in case this plane doesn't work out.

I should, however, mention that there is no specific course for mechanical puzzles (or at least to my knowledge) but you will easily get all the basic knowledge such as heat and mass transfer, structural analysis, mechatronics, Fluid dynamics, manufacturing etc that you may need for your endeavour

unknown2895 commented on a post in r/space
unknown2895 3 points

Well Indian space research organisation has a pretty well record of sticking to their plans. It's mostly because they keep it simple and cheap.

I wish they were a little bit more ambitious though. I think playing safe is why they can stick to the plan. After all, innovation is risky and you can't be more innovative and stick to your plans at the same time

unknown2895 commented on a post in r/SubredditDrama
semtex94 15 points

We've done that before with SRBs.

He's damn good at PR, I'll give him that.

Again, he's so good at PR that he got his fan club to buy a bunch of glorified blowtorches.

I already shit on both, I can handle another.

unknown2895 4 points

We've done that before with SRBs.

No we haven't. Space shuttle program was mostly a disaster (it was a great learning experience though) as it huge cost overruns and it had nowhere near reusability as falcon rockets.

Cthonic 7 points

SpaceX actually has a pretty terrible track record compared to real space agencies and the Falcon rocket is barely any better than the aging Saturn V. He's doing things that NASA, if properly funded, could blow out of the water for half the budget.

He's a huckster with no real interest in actual space exploration. He's dangerously apathetic about the side effects of his company's actions and is a cheerleader for a stupid, ass-backwards plan from the 50s just because "muh Mars colony".

unknown2895 3 points

I just wanna point out that a single saturn V launch used to cost more than a billion dollars (after adjusting for inflation) while falcon heavy costs about 90 million dollars. Of course, the comparison is futile because saturn V is dead and will never fly again. Also, NASA can't do what SpaceX does and neither it should. It is an exploration agency and should focus on exploring moons and planets and leave this stuff on private contractors like SpaceX that can do it in a much more cheaper way.

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ginbot86 1 point

Nice! Which one did you get?

unknown2895 1 point

It's bq34110 Multi-Chemistry CEDV Battery Gas Gauge for Rarely Discharged Applications Evaluation Module

The problem is that it's not for automotive applications but hey it's something

ginbot86 1 point

Ah, that's not really an Impedance Track gauge (CEDV = Compensated End of Discharge Voltage, which is effectively a coulomb-counting-only algorithm), and that particular gauge is a fairly niche one intended for standby applications.

It is pin-compatible with a standard Impedance Track gauge like the bq34z100-G1, so you could theoretically change the chip out but you would lose the calibration data stored on the existing gauge. If you're doing basic voltage/current/temperature measurements this isn't an issue, but actually using it as a fuel gauge is more challenging if you don't have a TI EV2300/EV2400 USB interface (their software won't accept anything else).

unknown2895 1 point

Oh I see. Well, I wasn't going to do much with this probe anyways. My college has a whole a TI lab so I guess I can ask them for EV2400. Thanks for help!

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aussieEbiker 2 points

I've thought about it some more: just forget about being able to add another 2p later, even RC balance chargers can't cope with cells in the same parallel bank having different capacities, you'd have to unsolder/unspotweld the whole thing and group your cells into parallel banks of the same capacity. Not worth it, you're likely to wreck cells trying.

Instead make two 3p batteries, one now, one later. Have two BMSs.

Though given you only want 6s the RC balance chargers are perfect too, you wouldn't have to split packs. Up to you. Just forget about combining different capacity and age cells, it's inherently dangerous, that's why I called people building packs out of old laptop cells crazy.

unknown2895 1 point

I won't be doing that. I will be buying new cells all together

aussieEbiker 1 point

it's if you tried integrating them into an existing battery you'd be mixing capacities and ages, because cell capacity reduces with charging cycles

unknown2895 1 point

I guessed that it may cause issues. I was planning to build the 5p before but due to budget constraints (it's a college project), I had to drop some cells. Anyways, thanks for the help!

1Davide 2 points

Li-ion ... culture doesn't even exist here.

Tell that to our many customers for Li-ion BMSs in India! There's plenty of Li-ion culture in India, "thanks" to the poor reliability of the grid.

unknown2895 1 point

I am pretty sure that small level customers do exist but when it comes to mainstream market, electric vehicles, in general, are almost non-existent. Although, that might change in a couple of years.

1Davide 1 point

small level customers

One of our customers in India is 100 M$ company, not "small", and they're running a large volume of Li-ion batteries for telecom towers,

unknown2895 1 point

Oh I see. I was thinking more in terms of automotive. Didn't think those telecom towers also used Li-ion packs

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1Davide 2 points


Here's the charger in question: "Flyfilms 24V 2A AC DC Power Supply Adapter(5.5mm Tip) charger for LED Lights Battery Camera dslr dv nikon sony canon panasonic "

That is not a charger. You need a charger, not a power supply.

unknown2895 1 point

Oh I see. Thanks for the help!

unknown2895 commented on a post in r/penpals
sdfgregre -2 points

ya im sorry /.\

unknown2895 1 point

No need to be sorry. Any plans for college?

Vagina-Juice 9 points

you just fed a troll and didn't even notice.

unknown2895 3 points

I looked at his/her history and its the same thing over and over again. I know it might be troll and but he/she might just need help. If it was a troll, he/she would've deleted other posts.

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Vew 2 points

This doesn't really answer your question on what equipment you need, but it may help you with the rest. I picked it up from a fellow redditor that works in the industry.

This might be a controlled document, so i'll probably remove the link in a couple of days.

unknown2895 1 point

Thanks! I have got the document and will look more into it

unknown2895 commented on a post in r/india
kwadd 1 point

You're saying that we're taught from a young age to think that we're better off copying that to do something original? Yes, creative thought is actively discouraged here. We're encouraged to memorise and learn 'by heart'. This could have something to do with plagiarism.

unknown2895 4 points

I think its bit more nuanced than that. You can "copy" someone else's and build upon it. Research papers do that all the time. But there is a way to cite things properly. Nobody in Indian schools is even taught about this concept. People tend to think its either cheating or coming up with something completely original. The concept of building something upon someone else's work while giving it the respect it deserves doesn't exist here

unknown2895 5 points

I disagree with him about his conclusion.It's not just "because they can" but its because copying is part of this culture. Just look at how kids do their homework and labs in school. Its just mindless copying from peers and wikipedia. Nobody even understands the meaning of "citation" let alone do cite a source according to MLA or Chicago or some other format.

unknown2895 commented on a post in r/india
unknown2895 5 points

Isn't it that both sides keeping bombing each other and both sides keep crying about it? It's pretty much business as usual

HowTube55 -3 points

I can agree with u if u Provide me with a video of Pakistani media Like this Dude. And wont u Upvt This ???

unknown2895 7 points

After typing "Pakistan media on India attacks" on youtube, here is a results:

DDE93 6 points

Pioneers rarely prosper. They lost a ship in a scandalous accident. Now you have two orgs: one is working on suborbital tourism, and the other is working in what is largely a redux of Pegasus - a micro-class orbital launcher sent up from under the wing of a 747.

unknown2895 2 points

Good points. Do you see any future for them? I feel like spacex and blue origin can easily kill this company.

DDE93 2 points

Blue Origin will kill the tourist part of their business.

Their competitor in smallsats would be Rocketlab. There they have a moderate chance yet - the market is big enough for both of them.

SpaceX is simply laughing in the distance.

unknown2895 2 points

SpaceX is simply laughing in the distance

Considering they have announced there plans to send tourists around the moon, I think they are laughing really hard at them

unknown2895 commented on a post in r/AskEngineers
dangersandwich 5 points

I tend to read books that give me a wider view of what's happening in the world, or books that help me think critically about the information that we're constantly bombarded with by the Internet, the media, and our self-constructed filter bubbles in the social media networks we use.

To me, it's more important to have enough foundational knowledge in different areas to be able to interpret information from those fields, and also to have enough self-awareness to recognize when we might be suffering from Dunning-Kruger syndrome when we think about and discuss topics outside of our areas of expertise.

One of my biggest criticisms of engineers is that although we're masters of digesting complex information and arriving to informed conclusions, many of us fail to recognize the bigger picture because we aren't aware of contexts outside of technology.

Anyway, that's enough ranting. Here are some books that I highly recommend to add to your list.

  • "Inventing Accuracy: A Historical Sociology of Nuclear Missile Guidance" by Donald Mackenzie — This one's kind of cheating since it's about how inertial guidance systems for ICBMs were developed, but its focus is on how politics, public perception, and technology interact with each other during the development of cutting-edge technologies. Very applicable and prescient to modern events.

  • "The Great Escape: Health, Wealth, and the Origins of Inequality" by Angus Deaton — In this landmark book, Nobel-prize winning economist Angus Deaton describes the origins of economic inequality, what drives it today, and what the future holds for societies around the world as inequality continues to increase. In my opinion this is the most grounded book on the topic of inequality for non-economists, completely blowing all other books on the same topic out of the water including Piketty's "Capital" and all of Stiglitz's writings. Deaton does not resort to hyperbole or cleverly framed statistics to make his point, and strikes a neutral tone on what is otherwise a very politically-charged topic.

  • "Thinking, Fast and Slow" by Daniel Kahneman — Kahneman is a Nobel-prize winning psychologist, which is notable because he won the Nobel in economics for his work in pioneering behavioral economics. In his book, he describes the "system 1 & system 2" model of how our brains process information; cognitive biases that tricks this system to make us behave in ways that depart from the "rational actor" model of economics; what we can do to become aware of these biases; and how to combat them in our everyday decision-making processes. Some other books on behavioral economics and social behavior:

    • Nudge by Richard Thaler & Cass Sunstein
    • Predictably Irrational by Dan Ariely
    • Freakonomics and its sequel SuperFreakonomics by Steven Levitt & Stephen Dubner
    • The Black Swan by Nassim Taleb
unknown2895 3 points

You should check out The undoing project by Michael lewis which is about Daniel Kahneman and Amos Trevesky and how they worked together to develop the theories of behavioural economics

unknown2895 9 points

Predictably Irrational: The Hidden Forces That Shape Our Decisions

Bad Pharma: How Drug Companies Mislead Doctors and Harm Patients

Why Nations Fail: The Origins of Power, Prosperity, and Poverty

Superforecasting: The Art and Science of Prediction

As far as biographies goes, I was bored by Shoe dog.

The Everything Store: Jeff Bezos and the Age of Amazon

Steve Jobs by Walter Issacson

Alibaba: The house that Jack Ma built

And of course, the best book on our lord and saviour:

Elon Musk: Tesla, SpaceX, and the Quest for a Fantastic Future

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