madengr

Per the article, it’s just more kids taking it. My kids HS has national testing day during the school week, when I assume everyone takes it.

Though not all radar uses pulses. Some are CW, as were the earliest experiments for detection (no ranging).

What kind of jobs do you run on them?

Glass PC cases; so much for EMI compliance. The old computers had metalized plastic cases for a reason.

We had that same rotary network in school (1986). It was neat that you would download to multiple machines at once, then upload from individuals. Of course we'd play Telengard and Battlezone when not programming, or using the hex editor to put 4 letter words in Battlezone. Fun times. I have a Model 100 I need to dig out and play with. I'd still like to have a Model 3.

If you look at a map, the entire area is broken into numbered areas, with 51 being the most famous.

The water analogy fails in the saturation region of the transistor, as no more water flows through the pipe despite increasing pressure.

Globalstar simplex only takes about 200 mW over 2 seconds to deliver a 72 byte message, into an antenna about 0 dBi gain. See the STX3 transmitter module.

I had on original “Big Red” from my grandfather, which unfortunately someone walked-off with. That book saved my butt in school several times, especially with the Laplace transform tables.

Reminds me of the Tom Baker Dr. Who episode where the Jaggaroth commander is split through time, existing in multiple centuries. He has daVinci paint multiple copies of the Mona Lisa which stay hidden away for centuries. He then steals the "original" in the 20th century and sells all of them on the black market to fund his time experiments.

Of course the Doctor goes back in time and paints FAKE on all but one canvas, leaving a note to daVinci to "nevermind the scribble, just paint over it".

Line of sight (1/r^2) often has lower attenuation than urban propagation (1/r^3 to 1/r^4), so it’s often easier to hit a LEO satellite than a terrestrial tower.

I use BNC connectors almost daily, and that have been around for almost 80 years.

I’d stay away from any of the PC based stuff. Get a scope with physical knobs and screen.

We had the “test of knowledge”, which if you didn’t pass (multiple attempts), you didn’t pass the course.

It was 60 questions in 180 seconds. No hard calculations, just stuff you were an embarrassment to the prof if you passed EM and didn’t know.

He gave it right before break (3 hour class). I got a 96 first attempt. Next highest grade was a 30. He said I could leave as the remainder of class was to go over the test. I literally strutted out and said I was going to have a cold beer. Good times.

None here. I bought a 2015 Leaf in 2017 with 19k miles for $8,500. At 75k mile now with zero issues. Just plug it in at night and drive it around town. It's a glorified golf cart, but it works great.

Why has crypto crashed when it was supposed to be inflation proof?

Doesn't the normal Starlink have an Az-El motor for rough positioning? Beam steering only gets you so far, and the more off-boresight you get, the worse the performance.

Yep, the domain knowledge is too narrow to develop free or open source tools like that. Someone with that knowledge needs to work full time to gain it, thus needs to make a living at it. The few open source tools come from universities were labor is cheap, and suffer from bit rot. I’m specifically thinking of MAGIC.

I'd argue it's not even a wheel, as those are round. If a snake could slither vertically, it could climb a hill with a wave motion too.

Yeah, I did some EM simulations of that years ago when I read about it. Shame it never took off. The balloon tether is really cool.

http://www.corridor.biz/

Yeah, POE is great. I have a 48 port Ubiquiti switch with POE AP and cameras. I ran duplex fiber and 2 pair of shielded CAT 5 to each room. For the downstairs rooms, those are through short runs of conduit to the basement, so I can poke whatever else through there, like the single mode jumpers. I should have run conduit upstairs, but I do have a 4" PVC running from basement to attic, so I could run single mode upstairs, but would require drilling and fishing.

I wired my house with 62/125 fiber 22 years ago as a 1 km spool was only $250. I’m too lazy to look it up, but I suspect multimode fiber is cheaper than copper, and termination kits are cheap now.

I’m running 10G on single mode 100 ft jumpers to a few computers in the house and that’s cheap too. SFP are $35 but the NIC are more.

The parasitics all depend on the model, as I used LTSpice recently for an RFIC class for a 5 GHz LNA. The .net directive allows two-port analysis and even a Smith chart. Though Microwave Office is my go-to tool.

If process engineers are so rare, why don’t they pay them like they are rare? My wife got the hell out and into data science. Much more respect and pay.

What is the other ship in that photo?

Which is exactly what concerns me as people start throwing high level languages with loads of questionable libraries into critical microcontroller circuits.

I’ve recently dealt with power-on reset, oscillator start up, and UART timing issues which required digging into 600 page data sheets to resolve the issues. No way in hell I’d ever deploy a product with circuit Python, Wiring, Arduino, etc.

As an RF/Microwave engineer, I think the elephant in the room are the control electronics. Presently these are racks of equipment for a few logical qubits.

Isn’t there a spareness limit to the qubit arrays to maintain entanglement? How are the read and write electronics going to be reasonably sized, or ever going to achieve the density needed for a million physical qubits?

Ha ha, when I was a kid with my C64, I used my moms old reel-to-reel tape deck to store data.

I still have a C64 and tape drive.

There was a magazine in the 80’s where you could scan in the code with a bar code scanner.

I have 83% capacity on my Leaf at 7 years and 75k miles. I live in Kansas City where it typically ranges from 0F to 100F over the year.

The kid down the road from me in rural VA had no indoor plumbing, but had a VIC 20.

I eventually got a C64, but that was after my dad brought home a IBM PC for a few months to do chemical calculations in a spreadsheet. He said it was revolutionary that he could put this machine on the factory floor reactor and develop plug-in-chug calculations for reactions.

He also contracted a local EE to develop a CNC marine buoy winding machine based on the PC. I remember talking to the guy as a kid and he said it was compiled BASIC. It interfaced to the gantry motors and servo system via a giant, custom control board he made.