jwildeboer, (edited ) to 3DPrinting
@jwildeboer@social.wildeboer.net avatar

I finally gave in and ordered 200 small but strong magnets to up my 3D printing game to cool gadgets that can open and close with the power of invisible attraction :)

maugendre, to mathematics
@maugendre@hachyderm.io avatar

Concentration of measures:
Talagrand's "work illustrates the idea that the interplay of many random events can, counter-intuitively, lead to outcomes that are more predictable, and gives estimates for the extent to which the uncertainty is reigned in."

Marianne Freiberger: https://plus.maths.org/content/abel-prize-2024 @data @mathematics

itnewsbot, to random
itnewsbot, to random

Thermal Earring Tracks Body Temperature - If you want to constantly measure body temperature to track things like ovulation,... - https://hackaday.com/2024/02/13/thermal-earring-tracks-body-temperature/

wjmaggos, to random
@wjmaggos@liberal.city avatar

Trolls live in the weird space of lies, stupidity and cruelty. The inverse of what I call , the personal qualities a culture needs to cultivate to make democracy work well: integrity, curiosity and empathy.

Like all trolls, you never know if wants you to think he's serious when he is not, or he just has no idea what he's talking about. He's always trying to get attention and raise up his supporters by making others feel bad or confused. It breaks public discourse.

SirTapTap, to politics
@SirTapTap@mastodon.social avatar
mikemathia, to random
@mikemathia@ioc.exchange avatar
LouisIngenthron, to boardgames
@LouisIngenthron@qoto.org avatar

Prototyping a idea with and !

kbob, to 3DPrinting
@kbob@chaos.social avatar

Help! What's the best way to bond wire to a nail?

I want to make a magnetic switch where if a piece of iron is touching two magnetized surfaces, it completes the circuit, and a micro controller notices. I think I can make the surfaces from nail heads and magnets in a 3D printed housing. Is there a good way to attach hookup wire to a nail? Solder? Crimp? Other?

Completely different ideas?

Thank you.

🧵 1/2

kbob,
@kbob@chaos.social avatar

This is the general idea. Can I attach wires to the sharp ends of the nails somehow?

I want the switch to close when a paperclip or similar is stuck to the heads of the nails.

It is for an indoor environment, room temperature, low vibration. Milliamps of current. But I'd like it to last for a few years.

kbob,
@kbob@chaos.social avatar
kbob,
@kbob@chaos.social avatar

@Siff The electronics are assembled now. Not the cleanest, but acceptable.

The metal plate is a cover for a ceiling junction box. It's a heatsink for the LEDs. I ground out a hole using a Dremel cutoff wheel -- that was the best tool I had on hand. And I dropped it while the thermal adhesive was wet. That's why it's smeared all around.

Still, I'm my own worst critic. It's just fine, and I'm sure the recipient will love it.

Underside of the assembly in the last photo. On the bottom of the steel plate, a Teensy LC is attached with 3M Dual-Lock™ tape. A power MOSFET is also attached with Dual-Lock tape, and a piece of orange electrician's tape is under the MOSFET's pins. Several pieces of hookup wire connect the Teensy, the MOSFET, the LED ring, and the two studs in the dark printed assembly, which isn't really visible here -- it's on the top side.

kbob,
@kbob@chaos.social avatar

@Siff And here's some video. It still works.

N.B., those screws are placeholders. The full assembly will use longer screws with bigger heads (or washers).

The same assembly as in previous posts. I drop a paperclip onto the stainless studs, and the LED ring lights up. I remove the paperclip, fumbling slightly, and the LEDs fade away.

kbob,
@kbob@chaos.social avatar
kbob,
@kbob@chaos.social avatar

@Siff This is a desk lamp.

When it has some scrap, it lights up. When I take the scrap away, it goes dark.

My cousin works for the manufacturer, and he wanted it for his desk. He hasn't seen it yet.

FlockOfCats, to apple
@FlockOfCats@famichiki.jp avatar

I looked everywhere for some screws I had set down before I started working on my computer.

I looked on the ground, under the sofa, behind the desk, under the cabinet. I was totally flummoxed.

Turns out they had hitched a ride on the iPad when I cleared off the desk 😮

rasterweb, to 3DPrinting
@rasterweb@mastodon.social avatar

Tool Magnetizer / Demagnetizer! After all the info yesterday I printed two parts to stick some of those hard drive magnets into and yes, it does work. Both magnetizing & demagnetizing.

I wrapped gaff tape around half of the thing so you have to use the other side because of the polarity of the hard drive magnets.

I should have made the slots a little larger so I could fit two magnets in each cavity.

And now I am tempted to buy one so I can compare performance. 😜

a 3D printed tool magnetizer / demagnetizer with some gaff tape wrapped around half of it and a hard drive magnet.

itnewsbot, to Depression

In depression treatment trials, placebo effect is growing stronger - Enlarge / A decent placebo setup for transcranial magnetic stimulation ... - https://arstechnica.com/?p=1971234

InCameraNet, to ADHD

Hexagon tile magnet slider prototype. Produced October 2022. Epoxy resin. Transparent blue. ~50mm diameter. 13.8mm thick. 25.9 grams. 4mm magnets. Polished up to 2000 grit. Not for sale.

image/png
image/png

InCameraNet, to ADHD

Hexagon tile magnet slider prototype. Produced October 2022. Colorless epoxy resin. 4mm magnets. 49mm diameter. 12.4mm thick. 24.4 grams. Polished up to 800 grit. Not for sale.

image/png
image/png

InCameraNet, to Orange

Hexagon tile magnet slider prototype. Produced October 2022. Epoxy resin pigmented with fluorescent orange acrylic paint. 4mm magnets. 47.4mm diameter. 14.6mm thick. 26.7 grams. Polished up to 1000 grit. Not for sale.

image/png
image/png

Scientists Trap Light Inside a Magnet – Paves Way for Tech Innovations (scitechdaily.com)

Researchers have discovered that trapping light in specific magnetic materials can greatly amplify their properties, offering potential innovations like magnetic lasers and a fresh perspective on optically controlled magnetic memory. A groundbreaking study conducted by Vinod M. Menon and his team

Lab Lab Mini: Portable Electronics Workstation

I made this design so that I can take all of the gadgets and prototyping electronics that I work on and attach it to my laptop making my setup much more portable. I was too late on submitting for the magnet contest, but made an instructables guide on how to set it up. I also have a printables post for the 3D parts. I have mounts...

bornach, to medicalcannabis
@bornach@fosstodon.org avatar
Maker_of_Things, to random

Q1 Hello Makers! Say hi, and tell us what you’ve been up to this week. #MakersHour

A1: #MakersHour Hello, I’m Alfred and I have been finishing the trusses at @CleavleyWorks, and clearing up a fallen tree branch after Monday’s sudden storm. Also been doing maintenance in Manchester.

Tonight’s soundtrack is: https://www.youtube.com/watch?v=55ik-PzAXsQ

bornach,
@bornach@fosstodon.org avatar

A similar device demonstrated at UK where on a spinning turntable were used to trigger notes
https://youtu.be/hLkNJIMj-Mo

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