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FPGAhacker

2,646 karma · joined January 14, 2018

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FPGAhacker··on Ask HN: How can I start a business to generate electricity?
If you are going to make a claim, you should back it up with citations. [1]

[1] https://guides.lib.uw.edu/research/citations/citationwhat

FPGAhacker··on Patent Trolls Inbound: Our First Lawsuit
“Right thing to do”, or, “punch back 10 times harder so the next troll thinks twice.”

Both work for me. When people trumpet their altruism, I usually don’t buy it.

I don’t really care about geohotz motivation though. Glad to see someone with the means standing up to the trolls.

FPGAhacker··on The end of the manual transmission is near?
That's like saying dancing is a shitty way to experience music.
FPGAhacker··on John Carmack: Best Programming Setup and IDE – Lex Fridman Podcast Clips
I suppose it depends on what vim features you use but it hits the sweet spot for me now. I frequently use macros and block editing, as well as tim pope’s surround.

I hit edge cases occasionally still though I can’t think of a specific one right now. When it happens I sometimes open vscode’s terminal panel and Do a quick edit in nvim on the spot without leaving vscode.

Vscode has replaced putty for me in my workflow.

FPGAhacker··on John Carmack: Best Programming Setup and IDE – Lex Fridman Podcast Clips
They both work fine for me most of the time.

There are edge cases but I can’t think of a specific right now. When I run into one, which isn’t that often anymore, I’ll open vscode’s terminal panel and do a quick edit in nvim there.

FPGAhacker··on How to Stop Procrastinating on Your Goals by Using the “Seinfeld Strategy”
The don’t break the chain thing is nice. I’ve used it a few times, but it can be very demotivational when you had a super long chain and you broke it. It’s very hard to get momentum again.
FPGAhacker··on Bill Watterson’s refusal to license Calvin and Hobbes (2016)
Or perhaps they just want people to enjoy the work. Success is an overloaded term.

I would definitely prefer people producing things I’m interested in promote them than not.

FPGAhacker··on FTC action against Harley-Davidson and Westinghouse for limiting right to repair
I’m not saying you can’t have bob the janitor fix it. I’m just not going to guarantee bob the janitor didn’t screw the whole thing up. But knock yourself out, have bob fix whatever. It’s your widget.
FPGAhacker··on FTC action against Harley-Davidson and Westinghouse for limiting right to repair
I don’t disagree but this is about warranties. Apple etc make it difficult to just repair, because they glue stuff together and invent weird screws that need specialized tools. Just hard to repair.

This legal action is about Harley saying your warranty is void if you have repairs done through a third party.

I mean the law says whatever it says and that’s the end of it, but it sounds like crap to me.

If I sell you a widget and I guarantee it’ll work for 5 years as long as you have me repair it instead of bob the janitor, I have a hard time seeing the problem. Frankly I think if you have bob the janitor repair your widget it’s now on bob to provide a warranty.

But what I think doesn’t matter, whatever the law requires is.

FPGAhacker··on Ask HN: How to learn mathematical proofs from scratch?
That's what algebra was like for me. I never was able to develop any intuition for algebra. Calculus on the other hand was very intuitive for me.

Algebra was like solving a puzzle where you randomly move pieces around to try to get them in order. There didn't seem to be any real principles involved. Just a set of rules to memorize.

FPGAhacker··on Purdue Starts Comprehensive Semiconductor Degree Programs in U.S.
In my experience, programming is something you can get pretty far learning on your own. In grade school. I’m not talking about red-black trees or computer sciencey things, but you can definitely get started making games of varying complexity when you are 10 years old or younger.

Things you can build and see and have immediate feedback.

That just doesn’t happen with chip design. Not that it can’t, and I’m sure there are examples (Woz’s paper and pencil circuit design come to mind) but it’s far from common, compared to coding.

I remember in 5th grade being asked to help another student write a choose-your-own-adventure style game in basic on an apple //e back in the “one per classroom if you are lucky” days.

I figured I was going to be a programmer as a profession but college came around and it was a coin toss for me between computer engineering and computer science. At the time, engineers made more money so I went with that. Doubled as an EE/CE. I was ok at the typical EE stuff, better at the little bit of programming we were exposed to (in pascal). I did very well in semiconductor physics, but I didn’t really get sucked into it. Got to a digital design class, and that hit the spot for me. I didn’t like plugging wires in on breadboards because it was entirely too frustrating trying to figure out which wire you got wrong, plus I’m colorblind and the shades of red and green insulation on wires are perfectly impossible for me to tell apart except under very very bright light. But I loved designing the synchronous digital logic.

It’s just not something you are super likely to randomly pick up on your own at an early age. And to be honest, even if I had been exposed to digital design back in grade school, I doubt it would have resonated. I could easily understand things like “GOTO 10.” Understanding clocked logic, or binary arithmetic probably wasn’t within my reach back then.

Nearly all of the EEs in my class had never programmed anything before the 2 classes in our curriculum. All the people that knew how to program went into CS (except for a few like me). So the few logic designers that come out of an EE program don’t seem very likely to be good at programming. Just different interests.

FPGAhacker··on How far behind a plane is its noise?
Well, in many planes it would be the firing of a cylinder. But you don’t need a distinct event. You look at an instant in time. It’s a fundamental of calculus called an infinitesimal.
FPGAhacker··on How far behind a plane is its noise?
I may have missed something, but what I saw I thought was accurate.

Is it in dispute that it takes time for the sound to reach you?

Is it in dispute that you can discern the direction from which a sound came?

Is it in dispute that the aircraft has moved during the time it takes for the sound to reach you?

Is in dispute that the sound emitted in the instant of time the aircraft is in position A will not reach you until the aircraft is in position A+k?

Is it in dispute that there are realistic velocity vectors for which the direction of sound from position A is perceivably distinct from the visually observed position A+k?

What if you imagine instead a boat traveling parallel to the shore on which you stand. Has the boat moved perceptibly from position A by the time the wavefront of the wake generated at position a reaches you?

How about this visual simulation of a moving sound source? https://www.youtube.com/watch?v=StXXPkCMREU

Or how about this video https://www.youtube.com/watch?v=6g6uJTsJ9CE

Do you notice the sound waves are not concentric?

FPGAhacker··on Show HN: IoT device to warn you of a supernova hours before Earth is destroyed
How is your dead corpse going to care about any of the hours of your life?
FPGAhacker··on How far behind a plane is its noise?
Of course you hear the siren or crazy man or anything, before it passes you if the component of the velocity vector pointing to you is slower than the speed of sound.

But it still takes time for the sound to reach you. And in that time the source has continued to move. So it will be as if you are watching a video but hearing with a tape delay.

If some one was standing 1000 meters away from you, and had a sign that flashed a sequence of numbers, 1,2,3,4,… once per second, and at the same time as the number flashed, they shouted the number loud enough that you could hear it, do you think what you heard and what you saw would be in sync?

FPGAhacker··on How far behind a plane is its noise?
This has got to be a troll. I have trouble believing you are being serious saying things like this.
FPGAhacker··on .01% of Bitcoin holders hold 27% of all Bitcoin
gp > “belief in its value”

p > “assets that are represented digitally”

Those seem equivalent to me.

FPGAhacker··on Is anyone still using assembly language? You betcha (2007)
Vendor lock in.
FPGAhacker··on Think of a Number. How Do Math Magicians Know What It Is?
Well, they can know the number, but not how fast you are thinking it.
FPGAhacker··on The strange business of hole-in-one insurance
> But why should my insurance premiums go toward paying for someone else without car insurance?

Because that is what uninsured motorist insurance is for? If you buy flood insurance and it floods…

FPGAhacker··on Why Jony Ive left Apple to the ‘accountants’
I don’t love the Touch Bar entirely, but I do really like the slider for brightness and volume.

I’d rather have fkeys for everything else. Maybe they could give us a mini touchbar just wide enough for going volume and brightness.

FPGAhacker··on Textsynth: Bellard's free GPT-NeoX-20B, GPT-J playground and paid API
<< The taco flew >> around the room and landed in our hands. I'm not going to lie: it was like a dream come true. My friends and I began to devour our delicious dinner; the taste of spicy, marinated beef, crunchy corn chips, and the smoky, salty, and delicious chorizo just set in. I have never had anything taste so amazing.
FPGAhacker··on Ask HN: What happened to Twitter poison pill?
>Why does the board get to sell my shares?

They don't. The deal has to be approved by shareholders (of stock with voting rights).

FPGAhacker··on The Ever Loving Hell
This is true, but Cleaver does not rhyme with Clever.
FPGAhacker··on Pupils Reveal ‘Aphantasia’ – The Absence of Visual Imagination
Or it the calculations were easy for you.
FPGAhacker··on Pupils Reveal ‘Aphantasia’ – The Absence of Visual Imagination
Oh, thanks. I guess I judged too quickly.
FPGAhacker··on Pupils Reveal ‘Aphantasia’ – The Absence of Visual Imagination
Eh, I’m not so sure about what they believe the pupillary response was a proxy for.

Your eyes dilate when you concentrate.

Stare at your eyes in the mirror and start doing simple arithmetic in your head. Adding numbers, multiplication of multi digit numbers. Your eyes will dilate noticeably.

FPGAhacker··on Melting KiCad
Ah yes. The Pollock Router.
FPGAhacker··on California grid set record of 97% renewable power on April 3
The fact that the return is not compounding makes a very large difference here.

$16,500 returning 10% of the original principle per year isn’t a great investment. 25 years you have $41,000 + 25 yr old solar panels.

$16,500 returning 10% compounding over 25 years gets you $162,000 + the $16,500 principle.

Considering opportunity cost spread evenly over 25 years, those panels cost over $5000 per year.

There are plenty of reasons to go solar, but return on investment is not one of them.

FPGAhacker··on Ask HN: Finally ready to share my personal work, how to manage expectations?
I thought the book was good, but I listened to the audiobook narrated by Peter Coyote which was excellent.
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