buescher

55 ms·

811.
by buescher 5y ago
You probably got your amplifier into regeneration. As they say, amplifiers oscillate and oscillators don't. No rectifier needed.
812.
by buescher 5y ago
Those aren’t fractal antennas, which don’t really work very well anyway. Fractal antennas are effectively kind of like trying to tap a horn or discone antenna at the widest point. If you work in the biz there will always be people pitching
813.
by buescher 5y ago
Here's a rule of thumb that will work for you, no matter how large a company you work for or how you got the material or what agreements they have in place: if it's not explicitly public material you should not disclose it.
814.
by buescher 5y ago
The point was that building a simple x-ray device is about as technically far-out as say, winding your own transformer. Sure, not too many people do it, but it's not exactly on the forefront of technology either. To your point, safety
815.
by buescher 5y ago
They were certainly still around in the dusty corners of old shoe stores in the seventies and eighties but I never saw one used or even turned on. People were pretty aware of the hazards of that kind of thing by the fifties and sixties.
816.
by buescher 5y ago
It does, at least in part. https://www.rfcafe.com/references/radio-electronics/tv-xrays... https://www.repairfaq.org/samnew/tvfaq/tvaihxray.htm
817.
by buescher 5y ago
This example is totally unrealistic. In the USA someone supporting themselves working at McDonalds would qualify for Medicaid and have essentially no out-of-pocket medical expenses.
818.
by buescher 5y ago
Exactly, indeed. One of the links I gave shows how to use a 6BK4B rectifier tube for the purpose. No special X-ray tube or glasswork required. Most of the high voltage parts can be scavenged from old color tvs or monitors. Remember, thou
819.
by buescher 5y ago
I checked out all of Alfred Morgan's books from multiple public libraries (a platform accessible by children!!!) in the seventies and early eighties. Probably saw the golden book of chemistry experiments at some point too - it looked
820.
by buescher 5y ago
There's an irony in the breathless "built his very own x-ray machine" slant - x-rays are literally Victorian technology. Not for the reckless or uninitiated I suppose, but I remember books showing how to make x-ray devices f
821.
by buescher 5y ago
Two potential answers he left out: - It ships/deploys next month and you'll find out then - We've been shipping/using it since 2014 and you really should do your homework
822.
by buescher 5y ago
That's very nice dead-bug work. I'm surprised he didn't stake the wires or encapsulate the whole thing in glue, but since he brought everything out to tiny LEDs placed between pads, maybe staking was neither necessary nor co
823.
by buescher 5y ago
I have an opening price point Brother laser printer from about 2002 whose drum is on its last toner cartridge worth of wear. I’ve only used it lightly since I stopped contracting about fifteen years ago though.
824.
by buescher 5y ago
Too bad Google X couldn't invent indoor plumbing instead.
825.
by buescher 5y ago
I’ve met folks who’ve worked in that industry that won’t leave one running unattended.
826.
by buescher 5y ago
I've had exactly that problem and had to resort to searching other booksellers for the Penguin edition of something in the public domain.
827.
by buescher 5y ago
On a related note, Amazon's recommendation engine was terrifyingly excellent in 1999-2000 or so, to the point I was probably spending more on books than I should have been at the time. It has been on a long downhill trend since some p
828.
by buescher 5y ago
This is like a software engineer's idea of modular hardware. Looks like fun and may be great for one-offs. The problem for using a system like this for early prototypes and proof-of-concept is that the hardware AND software of a cost
829.
by buescher 5y ago
Then you go out of house until the saw can be repaired or you can recruit a new employee to run it. If it's really to your advantage to have the capability in-house, no one will bat an eye.
830.
by buescher 5y ago
Economies of scale, basically. Your options for a case are to go full-custom, which is expensive in small volumes, or to go semi-custom, which involves buying a case and having holes machined, which is expensive. With power supplies, you pr
831.
by buescher 5y ago
I thought your advice to look for contract gigs was pretty good. I'd only add that I worked in that space for a while and consultancies are generally either desperate for work or desperate for help. If they're desperate for help
832.
by buescher 5y ago
I like Wolfram Alpha a lot but google's calculator is faster and does a very good job with units analysis.
833.
by buescher 5y ago
It's a worthwhile specialization, but I have no idea how broken your recruiting pipeline would have to be to consider a layout designer for a "EE generalist who lays out his own circuit boards" sort of position. The typical
834.
by buescher 5y ago
You found a PCB layout designer, not a design engineer. A good one is a real force multiplier that can lay out boards faster and more professionally than pretty much any EE I've worked with that lays out his own boards. You might not
835.
by buescher 5y ago
5. Which leads to: for small volumes (or MVPs or early-stage prototypes), if you can buy your power supply, you should! 6A. Most products with a microcontroller will need verification that they are compliant with FCC regulations on unintent
836.
by buescher 5y ago
I forget if Commodore BASIC partly tokenized programs or simply stored them as text, but it definitely stored formatting information, so there was an art to minimizing memory footprint and execution speed by entering them that way.
837.
The 4096-bit RCA Selectron vacuum tube memory prototype(rcaselectron.com)
5 points by buescher 5y ago|0 comments
838.
by buescher 5y ago
It's 2022, software is free, you can have anything you want, and you want Windows 95. I'm going to go sulk about human nature for a while.
839.
by buescher 5y ago
You probably wouldn't enjoy his "Foreigners Around The World" in National Lampoon from 1976 either.
840.
by buescher 5y ago
Back in the first-to-invent days of U.S. patent law, lawyers and lab notebook guidelines used to recommend the "6 February 2021" format as unambiguous.

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