Saturday, May 15, 2021

Tesla Model S Onboard Systems Battery Runs Down While on Charger

…and the the fun begins.

Posted at 10:34 Permalink

Friday, May 14, 2021

Inside a 10 Gigabit per Second USB-C Cable

The tip of a ball-point pen is shown for scale. Not all such cables use these micro-coaxial conductors: some use shielded twisted pairs. The conductors in the centre are for compatibility with USB 2.0.

Posted at 12:04 Permalink

Thursday, May 13, 2021

The True Cost of Processor Manufacturing: Taiwan Semiconductor Manufacturing Company 7 Nanometre Process

Posted at 12:10 Permalink

Tuesday, May 11, 2021

The Joys of Surface-Mount Components

Posted at 07:59 Permalink

Sunday, May 9, 2021

HP 9825 Repair Part 7: How Dynamic RAM Works (or Doesn't)

In the next installment of the “everything is broken” saga, the focus moves on to the random access memory (RAM) of the Hewlett-Packard 9825 laboratory computer. The refresh circuitry appears not to be working, which causes the system to rapidly forget what's been stored. What's refresh? Perhaps a deep dive into the history and technology of dynamic RAM will refresh your memory!

The HP 9825 uses the 4116 dynamic RAM chip, which brought back…memories…as I designed a 64 Kb memory board in 1979 using this same iconic chip.

Posted at 11:41 Permalink

Saturday, May 8, 2021

Judging Theories of Everything, with Lee Smolin and Eric Weinstein

There's even a brief discussion of the forthcoming Pentagon disclosures on UFOs at the end.

Posted at 14:26 Permalink

Friday, May 7, 2021

GoPro Inside a Dishwasher

If he'd added detergent during the initial rinse cycle (note that the detergent dispenser has an indentation to the left of the compartment that holds the dose for the wash cycle intended for this purpose), the grotty cruft on the plates would likely have been removed much earlier in the cleaning cycle, with more flushed out with the rinse water before the start of the main wash. See SCANALYZER for 2020-12-22 for details.

Posted at 13:28 Permalink

Wednesday, May 5, 2021

That Time a DC-8 Flew Faster than Sound

Here is an interview with Richard H. Edwards, flight engineer on the 1961-08-21 supersonic flight.

Posted at 12:46 Permalink

Tuesday, May 4, 2021

Rendering 3D in the Brain—The Pulfrich Effect

Here is more about the Pulfrich effect.

Posted at 12:35 Permalink

Monday, May 3, 2021

International Space Station Transits the Moon

Posted at 12:15 Permalink

Saturday, May 1, 2021

The Mind of a Chess Grandmaster

Posted at 14:11 Permalink

When a Boeing 747 Flew with 1088 People on Board

Here is more information about Operation Solomon, of which the flight was a part. The exact number of people on the flight was stated in contemporary reports as between 1078 and 1122, with agreement that two were born on board during the flight.

Posted at 13:36 Permalink

Friday, April 30, 2021

Weed Eater Wars!

Posted at 14:12 Permalink

Thursday, April 29, 2021

Black Plasma

Sodium ions absorb light from a sodium vapour lamp, resulting in a black plasma flame. The trick only works with monochromatic sodium light.

Posted at 14:20 Permalink

Wednesday, April 28, 2021

“Slash Resistant” Portable “Safe”

Posted at 13:31 Permalink

Saturday, April 24, 2021

Deep Dive—SpaceX Starship: Why Do a Belly Flop, and Why So Close to the Ground?

Posted at 10:53 Permalink

Friday, April 23, 2021

How Did the ‘Impossible’ Perfect Bridge Deal Happen?

Posted at 11:45 Permalink

Thursday, April 22, 2021

Empire of Grifters: “Quadro Tracker”

The amazing “Quadro Tracker”—invented by a former used car salesman named Wade L. Quattlebaum—is like Doc Smith’s “object compass”, except with dead ants, it claimed to be able to detect lost golf balls, drugs, weapons, explosives, missing persons, and game animals. Around 1000 units were sold at prices ranging from US$400 to US$8000 each to gullible school districts, law enforcement agencies, and airports, including the Texas Department of Public Safety.

Quadro Corporation, who marketed it between 1993 and 1996 before being shut down by the FBI and its principals indicted for mail fraud, said it worked via “static electricity produced by the body inhaling and exhaling gases into and out of the lung cavity” to “charge the free-floating neutral electrons of the signature card with the major strength of the signal”.

At trial in January 1997, the three principals of the company were acquitted of mail fraud and conspiracy.

Posted at 12:31 Permalink

Wednesday, April 21, 2021

Classical Music Medley Played by a Model Train

Here is more about Miniatur Wunderland in Hamburg, Germany.

Posted at 10:27 Permalink

Tuesday, April 20, 2021

Lined Up to Land on a Taxiway: Air Canada Flight 759

“Where's this guy goin'? He's on the taxiway.”

Here is more about the incident. “Air Canada has stopped using flight number 759.”

Is “whoa” the most-misspelled four-letter word in the English language?

Posted at 13:02 Permalink