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fotbr

702 karma · joined October 27, 2011

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fotbr··on Sherline Tools Is Going Out of Business
Do you expect the homeowner that needs to mow their lawn to build their own lawnmower? How about the "tech savvy" homeowner that wants an automated lawnmower? Should they be derided for buying one of the robot mowers instead of building their own? Should the person that needs a hammer and nails to build a raised bed for their gardening hobby be required to make the hammer or the nails, in the name of "learning something new/valuable"?

It comes down to the fact that these things are tools. Now that reasonably affordable "turnkey" or "off the shelf" options are available, what you're really seeing is the divide between those wanting building the tool itself as their hobby, and those that just want a tool to use on their other hobbies. There was less of a divide previously because for most people, the "just buy one" option simply didn't exist. Now it does.

I spent a lot of time over the years wire-wrapping circuits, then manually laying out and etching/making circuit boards, then using software to do the layouts while still etching/drilling boards myself, then learning and switching the bulk of my projects to surface-mount. It was a necessary part of making electronic bits for stuff I wanted, but I didn't enjoy that part. Now that I can draw something up, send it off and for a few bucks have professionally manufactured multi-layer boards in days/weeks, with many/most components already placed and soldered, why wouldn't I cut out the part I don't enjoy?

I played with 3d printers off and on from about 2006 onwards, though I never kept one around for any real length of time. I found that while I really wanted the capabilities, I didn't want "building and keeping a 3d printer running" to be my hobby. 20 years later, there are options that don't require printer maintenance to be it's own hobby, and I'm much more willing to keep one around.

I've had a couple Chinese-made mini-mills since 2002 -- Sieg X2s, if I remember the old naming scheme correctly, though they were sold by various importers with their own names/model numbers. I converted one to CNC operation in 2004. While I appreciate the work done by others that I could learn from, I did not enjoy the process or the project. If there had been a reasonably affordable "turnkey" option with the capabilities I wanted, I would have 100% taken it. If I needed another one now, with the options available, there's no way I'd bother to build my own. Even then, I would have gone with sherline's early cnc offerings -- they fit my budget, but were just too small for what I wanted to do.

My first CNC router was scratch-built in the early 2000s. My current one came in a crate 4 years ago, and cost about half of what building a new one with the same capabilities from scratch would have. Instead of spending a several months' worth of weekends building it, I spent one weekend unpacking it and setting it up, another fine-tuning it and the software settings, and then was able to start using it for projects I enjoyed.

The ability for people to make things at home is expanding, just not in the way you'd like to see. That isn't a bad thing.

At the end of the day, time is what is ultimately valuable, and I don't have nearly as much of it as I did when I was younger. At this point, I'd much rather spend what time I do have enjoying my hobbies and creating the things I want to create, not building tools or suffering through tasks I hate simply because someone else thinks that is the important part. It seems I'm not the only one.

As for companies that "care" disappearing, well, that's just the current business environment. When the only measure of success that's deemed important is the stock value -- or potential stock value, in the case of startups -- customer service is an expense that can be cut to inflate next months' quarterly report. In exchange, the concept of customer loyalty is dying as well.

fotbr··on Build Log: Macintosh Classic
I have a relatively ancient 8086 I still use from time to time with plain text files and a simple editor.

It provides a distraction-free environment for writing.

Save it to a 720kb floppy that my linux box can still read, and move it to a "modern" system for editing and such.

fotbr··on United Just Grounded Fleet of Planes Because Its No Smoking Signs Don't Turn Off
They're looking at it wrong. The signs are operable by the flight crew.

Given: Aircraft power is on, signs are on. Aircraft power is off, signs are off. Aircraft power is operable by the flight crew.

Therefore: Signs are operable by the flight crew.

In addition to the aircraft main power system(s), there's almost certainly a circuit-breaker that would turn the signs off. It might turn other things off as well, and circuit-breakers are not generally designed to be used regularly as switches, but there's a circuit breaker in reach of the crew that would turn those signs off.

fotbr··on Hair sample that put a man in prison turned out to be dog hair
https://cifsjustice.org/leadership/

4 Founders

6 Board of Directors

14 Advisory Board Members

3 Staff

I'll grant there may be a 4th staff member not (yet) listed on their webpage, but their organization seems a little top-heavy.

fotbr··on UK ditches ban on 'legal but harmful' online content
That's not worse, that's an outstanding mental image.
fotbr··on Why won’t anyone teach me math?
To pick on my favorite example,

Many years ago, my univerity's choice of calculus book also had the solutions to half the problems (evens or odds, doesn't really matter).

Department policy was also one of "we won't provide you the correct answers" even after an assignment had been turned in because the book was used for multiple years. The publisher had a new edition every year, but the university stuck with the same book because it was used for Calculus I, II, and III, which for most students was 3 or 4 semesters between starting I and finishing III, usually due to a scheduling conflict requiring a semester off between them, or because they had to repeat Calc II since the math department's selection of instructors was particularly bad for that course.

Those same (usually bad) instructors were all too happy to follow the department policy and not provide any feedback other than "correct" or "incorrect".

On the other hand, the university book store carried, and put on the shelf right next to the calculus book, the publisher's "teacher's solution guide", in two very reasonably priced volumes, which had the answers for the other half of the problem sets, as well as the step-by-step process for most of them, which was the valuable part, as you could see where you were erring.

Math department policy was that you weren't allowed to have those, either.

You can guess how well that policy was followed.

Those that put the effort in and learned the material did well. Those that just copied from the solutions book and turned it in did not.

fotbr··on Dumping and extracting the SpaceX Starlink user terminal firmware
Good catch. Curiosity got me and I focused on the distance aspect, missing the forest for the trees, so to speak.
fotbr··on Dumping and extracting the SpaceX Starlink user terminal firmware
Assuming that they're referring to decimal degree notation, and not Degrees-Minutes-Seconds, and that the location is correct, and ignoring the spheroid vs perfect sphere issues: about 11.1 meters (36.4 ft).

http://wiki.gis.com/wiki/index.php/Decimal_degrees

If it's DMS, again assuming location is correct, ignoring spheroid vs sphere: something between 80 and 100 ft (24.4 - 30.48 meters).

https://www.usgs.gov/faqs/how-much-distance-does-a-degree-mi...

fotbr··on Back in 1993, I was taking a number theory class
Trivially defeated with a boot disk and ResEdit.

Breaking things with ResEdit was pretty much my jr. high school hobby. It took a bit before I figured out how to restore things when I was done.

Head "tech" guy in the building eventually figured out it was me, showed me a few things and ended up just giving me an un-limited login and a few rules. Also taught me how to intelligently use ResEdit instead of the brute-force method(s) I was used to.

fotbr··on Elevator Sabbath service mode (SHO)
First, I appreciate the answer. I didn't know about the "no large bodies of water" requirement. When then leads me to ask, what's a "large" body of water?

Second, and I'm not trying to be snarky, just trying to understand: What is the limit on size? I understand there's a point where physically building and maintaining it isn't practical, but is still theoretically possible.

As for defeating the point, I'll admit I only somewhat understand that argument.

As far as I understand -- and I'll readily admit I do not have a great understanding -- the whole concept of the eruv is specifically designed to "defeat the point" of another rule (or set of rules).

Why is "defeating the point" considered to be "ok" or not "ok" based on scale?

Likewise, if "defeating the point" is wrong, why is it not always wrong?

Again, my intention is to understand, not to be snarky or otherwise inappropriate about it, and I'll apologize in advance if my questions cross lines I was unaware of.

fotbr··on Elevator Sabbath service mode (SHO)
To which I ask: Why not place a small loop of (wire, cord, thread, whatever qualifies) on the ground in a park somewhere. Then define "outside" and "inside" the other way 'round from "normal", thus making very-nearly the entirety of the earth "inside", and the very small portion "outside".

It seems logical to me, and I've never heard a reason it can't be done other than "that's defeating the point."

Which I admit, it entirely is, but I don't see it as any more "wrong" than encircling entire cities, and it's a whole lot simpler to maintain.

fotbr··on U.S. Supreme Court rebuffs Facebook appeal in user tracking lawsuit
Some states allow "one party consent" to recordings of communications (ie, phone calls). Extending that, as long as Company A is aware of FB's practices, then your wishes are irrelevant as far as the law is concerned.

I have no idea what California's laws are regarding the matter, or the laws governing any of the other participants. I'm just speaking in the general case, that some states allow it, and the argument that could be made.

fotbr··on Bruce Blackburn, Designer of NASA Worm Logo, Has Died
All I see when I look at the JAXA logo is the blue Lockheed Martin star that they've used since the mid 90s, if not earlier.
fotbr··on The mathematics of shuffling
I had a similar problem, several constraints (dozen or so, iirc), data set of a few thousand items.

I thought about finding an elegant solution, but in the end decided that just doing a (psuedo-)random selection of the remaining set and then running through the resulting ordered list checking each one for all the constraints (ie, random sort). As soon as it failed a hard constraint, or failed > x soft constraints, toss the list and do another random sort.

Ugly, but it worked. Chose this solution because 1) I knew how big the data set would be, and I knew it would not change size enough to matter; 2) The other, very jr developer could understand the method; 3) The constraints, while semi-complex, were simple to check; 4) would be needed once or twice a year, could run completely off-line, and could be started well in advance of when it was needed; 5) and finally computers are fast & cheap, while my time is finite and valuable

As a result, the decision that "brute force" running on any available workstation for a weekend was an acceptable solution. In it's lifetime, I think the longest time it took to find an acceptable solution was a few hundred thousand sorts, finished in a few minutes.

It's now been retired as the program it supported went away.

I wish I'd had the time to explore better, more proper solutions, but at the time, quick and dirty and done was more important.

fotbr··on Satran Satellite Tracking Antenna
Regarding other software / platforms, HTTP GET seems easy enough to work with.

My issue with wifi is really just a matter of too-many-networks and interference making it a bad solution for me.

But I understand the appeal of the ESP8266 (and the rest of that family of chips) and don't blame you one bit. IIRC it has a serial port on a couple of pins, so that's another comm option.

In any case, I look forward to seeing your progress. Good luck!

fotbr··on Satran Satellite Tracking Antenna
Wish it had more details: Rate(s) of rotation, load capacities -- including windloading, etc.

Also rather wish it didn't rely on wifi/android, but that's mostly because I don't use anything android based, and don't run any wifi on the home network anymore.

All in all though, it's still a pretty nice looking little az-el rotator. With different control software, it might also be a useful little addition to give your static security camera a bit of extra capability without breaking the bank.

fotbr··on The Railway Clearing House (1936)
They did a lot of the "rails to trails" stuff around here as well, but the underlying deal is that it's all technically land-banked and the railroads can claim it back at basically any time as long as it gets put to active use.
fotbr··on How does a gas pump know to shut itself off? (1981)
There's a station local to me with above ground tanks. They're in an area that flood regularly, which is why the tanks aren't buried.

I've never noticed a measurable difference when filling up the 20 gallon tank in the truck.

I suspect you'd have to buy a LOT to make a meaningful difference.

fotbr··on XB-1 Supersonic Rollout
The theory is that they can reduce the supersonic shockwave to the point where supersonic flight over populated areas can be legalized again.
fotbr··on Lockheed Constellation and Super Constellation Survivors
I grew up with the "Save a Connie"[1] plane and organization in my back yard, so to speak -- we lived about 6 miles from the KC downtown airport. I remember dad taking me down to the airport to sit on the river levee and watch the it arrive when they ferried it to KC. After that, I think I attended every public event they hosted between the plane's arrival and the change to the Airline History Museum.

I think I still have a bunch of their airshow flyers and other give-aways squirreled away in the basement somewhere.

Thanks for the interesting trip down memory lane.

1: http://www.conniesurvivors.com/N6937C.htm

fotbr··on Some views on having your system timezone set to UTC
Many universities these days have students scattered around the world in various distance education programs, or have students/staff/faculty at various other locations doing research in collaboration with other labs, facilities, etc.

Then there are their research partners, which again may be scattered around the world, etc.

So, no not customers in the traditional sense, but they depend on University services, and many of them are paying for the privilege.

fotbr··on Postman delivers 'somewhere in Sheffield' parcel
A few years ago, I placed an order from a small company on the east coast, to be shipped via USPS parcel post (ie, the cheapest and slowest option possible, though the company does pay the extra for tracking). In a rush, I fat-fingered the zip code. To compound the error, after submitting the order, their shipping software helpfully "fixed" the bad zip code by adjusting the city and state to match.

The next day, when they sent the shipping confirmation and tracking email, I saw the error. Of course, contacting them was too late; they did ask that I give the post office time to sort it out but were happy to send another one if it was time critical. I opted to wait as the initial mistake was mine, not theirs.

The package arrived a day later than expected, having gone to the small town in the wrong state, been kicked back as "no such address", sent to some big USPS facility in Chicago where they apparently figured out where it should go, manually crossed out the bad city/state/zip and wrote a correct one in and then came straight to me via the local post office, skipping the nearby sorting center that most packages go through.

I don't know how they pulled that one off, especially in a pre-christmas shipping glut, and without the package ever having had the correct address on it until someone working for the postal service figured it out and fixed it. Having a unique name probably helps, as does having a fairly unique street address, but I'm still impressed it didn't just get tossed into the dead-letter pile.

Living in the middle of the country, the post office's abilities are almost magic. Need to send a letter anywhere in the US? Two or three days, for a few cents (no idea what it costs now, I bought a few rolls of "forever" stamps at 40 cents apiece). Need to ship a package? USPS is often cheaper than UPS ground, nearly always cheaper than FedEx ground, and faster than either of them at still only two or three days. Same goes for receiving mail or packages.

Quality of service of all three, I recognize, varies with location and people involved. Around here though, it is damn hard to beat the post office.

fotbr··on Coronavirus: Trump halts travel from Europe to US
Because Boris is UK-Trump? (said only semi-seriously, I don't follow UK politics close enough to know for sure how good the comparison is)

I suspect it's a matter of the "special relationship" the US and UK have had for decades; Trump doesn't want to be seen as the one throwing our UK friends under the bus, especially with the promises he made during the lead-up to and implementation of Brexit.

fotbr··on Citroën introduces a two-seat EV that costs €2,644 and then €19.99 a month
Drivers Ed was an optional summer course in my district, and did include an on-road component. Not required at all (although the insurance company gave a discount for completing it).

HS graduation requirements vary (in some cases, much more than you would think) between districts. Usually, each town/city has its own district -- in rural areas a district may span many towns, in more urban areas, you may have more than one district in a single city. There are state guidelines, but we also have 50 different states. Federal guidelines are pretty sparse, and often only enforced by accepting funding -- don't take their money and you don't have to play by their rules.

I suspect that there is no blanket statement about the US public school system that will hold true nationwide (except, perhaps "it could be better" or "it makes no sense").

The reaction to not having a license is probably simply due to 60+ years of "The American Dream" for a kid was having their own car and the freedom^tm that came with it, and the simple fact that in the majority of the country, public transportation is crap, and our cities are not designed around walking. So a car, and license, is pretty much a requirement.

fotbr··on LogMeIn Acquired by Private Equity
Thank you, it looks very promising, and I like the host-it-yourself aspect.
fotbr··on LogMeIn Acquired by Private Equity
Is there a current (preferably free, ideally open-source) replacement that is as easy to use as Hamachi was?
fotbr··on Tesla Cybertruck
I've got a truck (an older Tacoma) and too many hobbies that make it hard to give up, so I'll likely always have a truck.

If Tesla had introduced a factory version of Simone's, I'd be screaming at them to shut up and take my money.

This thing...I'm sorry, I can't get over the styling. I love the numbers, and don't even find the pricing to be too horrible, but there's no away I'll have something that looks like that. Maybe Tesla truck 2.0 will be worth looking at.

fotbr··on The first high-resolution map of America’s food supply chain
A lot of the midwest (or the great plains) is devoted to feed corn and corn for ethanol, wheat, and soybeans. It's not california where you'll find fields of lettuce, for example.

With that said, there's no shortage of small farms growing most anything that can be grown in the area, but they tend to not be exporting anything beyond the local farmers market.

fotbr··on Build Your Own Thrust Vectored Rockets for Vertical Landings Like SpaceX
He's not landing it back at the pad or anything like that, just wherever it happens to be coming down at. Then keep it vertical(ish), keep it from moving too fast sideways or it'll tip over (again, stability, not guidance), and wherever it touches down, it touches down.
fotbr··on Diagnosing the Steel Failure in the SF Transit Center
My memory might be wrong, but wasn't the Brooklyn Bridge built when steel was still a relatively new thing? Its properties weren't entirely understood, or even well understood, so as a result, it was tremendously over-built.

Now, everything is about how little material you can use, how close to the minimums you can get and still maintain a theoretical factor of safety. The problem is that in doing so, small mistakes have a much bigger impact.

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