MisterHW

@MisterHW@fosstodon.org

Studied physics, now into power electronics and RF. PCB design with KiCad, mechanical design with FreeCAD. C/C++, Python to breathe life into things. Likes FEM, FDTD.

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erictopol, to random
@erictopol@mstdn.social avatar

Brain injury, loss of grey matter, and cognitive dysfunction at 1-year in people initially hospitalized compared with controls
https://researchsquare.com/article/rs-3818580/v1 preprint
"cognitive deficits...equivalent in magnitude to 20 years of aging"
Image

MisterHW,

@erictopol "evidence of ongoing brain injury" will never be accepted by the JustAFlu-ists. On the bright side, we will have plenty of evidence to analyze 10-20 years down the line.
Something tells me we'll only process this pandemic on a broad basis when denying the onset of the next one will fail.

ktemkin, to random
@ktemkin@chaos.social avatar

things you expect to burn yourself on when soldering and doing rework:

  • the iron
  • the hot air gun

things you actually burn yourself on:

  • the tweezers you forget you had under hot air
  • the solder braid you’re holding despite it touching an iron four inches away
  • that PCB you just hot air’d but couldn’t wait long enough before you grabbed it
  • the damned mounting/shield pins on SMA connectors
MisterHW,

@crazor @ktemkin

Hemostatic clamps here, they're the best!

erictopol, to random
@erictopol@mstdn.social avatar

The totality of all data available strongly supports masks to reduce SARS-CoV-2 spread, especially those of high quality.

New report https://jamanetwork.com/journals/jamanetworkopen/fullarticle/2811136

New analysis of flawed Cochrane review

https://www.researchsquare.com/article/rs-3486610/v1

image/png

MisterHW,

@erictopol

I keep posting this simple experiment. With it, for me at least, all is said re uncertainty whether masks work or not:

Forget OSHA fit testing for the general population.

Tape is the answer to how we should communicate how masks work.
It's the best way to experience the fit and leakage of face masks, period.
There should be essentially no leakage.

image/png

joeycastillo, to random
@joeycastillo@mastodon.social avatar

Fantastic paste application. 10/10, no notes.

MisterHW,

Excelllent illustration why I don't see QFN as a big issue. Solder bridges are so much easier to remove than on TSSOP. The only thing that can make it nasty is SAC solder on thicker power PCBs that wick away the heat.

MisterHW, to random

It's really tragic and funny how hackaday hides / deletes each and every comment that is not advertiser-friendly, or criticizes of their preferred content creators.
The latest offender is a blurb by @JennyList . I know these embellished links to other content don't pay well, but the criticism that Ivan Miranda ignores what Wintergatan pulled off can also be directed as the HaD writers.
But go on deleting all the comments, be like youtube.

MisterHW,

Here's the example what HaD found "too offensive". You're hysterical, @hackaday

MisterHW,

@hackaday

>this comment in particular is still up
you're late to the party, and the gaslighting won't work, as screenshots with the comments missing have been provided.

Maybe read up on my detailed comments and links to the MMX work first.

ps. the Wordpress "when in doubt, nuke the entire thread" approach is bullshit, as many other readers have also pointed out over time.

erictopol, to ai
@erictopol@mstdn.social avatar

It's counterintuitive, but can and will promote humanity and empathy in medicine https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(23)02292-4/fulltext

MisterHW,

@erictopol as much as I value your tireless efforts and scientific contribution ... until the "AI" progress you're talking about manages to end the greed of big pharma corporations, I'm not buying any of it.
All it will do is centralize massive data collection and monopolize control.

acb, to random
@acb@mastodon.social avatar

This is thoughtful design: Muji apparently released a flashlight that works with any combination of 2 AA and 2 AAA batteries, only more dimly with fewer batteries.

MisterHW,

@acb Oh I love this. Have been trying to come up with a compartment lately that accepts 26650 or 3x AA cells.
Wasn't super happy with flaps that fold inward when the 26mm diameter single cell gets shoved into the compartment.

image/png

kevinrothrock, to random

X rolls out new ad format that can't be reported, blocked: The new ads also don't disclose who the advertiser is or that they are even ads.

https://mashable.com/article/twitter-x-new-clickbait-ad-format

MisterHW,

@kevinrothrock

And worse still: "In addition, users cannot add Community Notes to these ads either."

mcdanlj, to 3DPrinting
@mcdanlj@social.makerforums.info avatar

OK hive mind... I don't care about resolution but I do care about ability to focus close. The webcam I put into my new printer can't focus anywhere near close enough, so the images are blury.

I don't have a lot of room in this case. I'd love one of the bare circuit board style cameras like the one I bought, except one that can focus close. What do you have that works, and that preferably isn't super expensive? I don't care about resolution, I just want to focus up close, and prefer fixed focus to avoid focus hunting as the print head zips around the enclosure.

MisterHW,

@mcdanlj @mattdm

anecdotally, ripping the lens holder off an IMX219 module isn't so great, as it needs to be glued back on with good coplanarity. I've managed to unstick several lenses (M7/M8 and M12), a little bit of heat goes a long way, as does scraping off the adhesive visible from the outside.

image/png

MisterHW, to random

"Switchable metasurface for nearly perfect reflection, transmission, and absorption using PIN diodes"

... with BAP50-03 pin diodes and 2L PCBs (Rogers RO4350B :< may need to see how this works with regular FR4)

https://opg.optica.org/oe/fulltext.cfm?uri=oe-29-18-29320&id=458203

f4grx, to random French

@North Who even need a glass lathe? Did you see this?

https://www.youtube.com/watch?v=3cxt8i0PYyY

MisterHW,

@f4grx @North

Also check this out:
https://www.youtube.com/watch?v=_fI3gpO5hW4

Sheril, to science
@Sheril@mastodon.social avatar

This quote by Carl Sagan hangs in my office.

MisterHW,

@Sheril I like how this is presented as something that goes back to character or attitude and made to sound like it's an actual effort. In reality, it's more about being addicted to finding out, and fitting new information into the picture that is meaningful enough that it demands from one to abandon other pieces that are not proven to be right or proven to be wrong is the reward.
It's a kind of conditioning like being able to pause and admire beauty in nature.

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