Lutetium
@Abhishek Viswanathan this seems to fit neatly along those lines: https://www.seeedstudio.com/Smart-Citizen-Kit-p-2864.html
Ben: Kind of shocked you haven't heard of them. Very cool series, more for teaching you _how_ to build machine tools, with the side affect of, well, building machine tools. It's hard to argue that for most of us it is a cost effective way to equip a shop, but it's a great set of skill building projects.
I'll continue my monologue about micrometeorites for a little longer. Because one of the problems for citizen scientists in the field is to definitively prove that you have actually found something extraterrestrial. With Larsen's method you can learn how to find stuff and be pretty certain, but to be really sure you need an electron microscope and more importantly an electron microPROBE (https://en.wikipedia.org/wiki/Electron_microprobe/). It's similar to an electron microscope but uses Bragg diffraction to identify the constituent materials of the object being irradiated. Since you've built your own SEM, @Ben Krasnow, I'm really curious to hear if you've ever attempted or considering making a microprobe like that.
I want to do https://amzn.com/0596514921 and https://amzn.com/1449396593 but understand others have had legal problems. I guess it's not hardware hacking really.
how would you collect them?
@alexwhittemore nothing too bad, have to write a reflection essay, formal warning, etc... I think having it associated with that lab might have been worse actually because I've already been politely *corrected* for having some chemicals and things in there
@Ben Krasnow For your diy SEM, did you have any issues with the outgassing of the materials you used?
gingery home workshop, informed by developments since then like cheap graphite for air bearings and cheap industrialized flat granite for reference surfaces, means more people could do the dan-gelbart micron-accurate grinders too Mark VandeWettering
Ben: When you have done your difference project, did you have a plan for the different equipment needed? For example the SEM, and the sputtering project..
@me ah I thought you only meant hardware as in electronics
FYI, I'll be posting a transcript of the chat directly afterward, in case anyone misses a link or something.
For example did you plan ahead the need?
Kendall I'll be googling for those improvements :-)
Peter, yes! I originally used acrylic (PMMA) parts, it was too much. I could tell the parts were outgassing since the pressure would go up, the more parts I put into the chamber. I switched to PTFE, which was much better, and luckily mechanically good enough for what I was doing.
And the metal? what was the base plate made of?
@Sam Zeloof Reflection essay thesis: "Ultimately this experience has shown me that my decisions were largely optimal given the scenario, and others would not have achieved goals as effectively" :)
Aluminum. I've never had problems with metal choices in the realm of vaccum that I need.
@alexwhittemore haha perfect, thank you
I haven't worked with vacuum but I have heard that epoxy resins particularly have a problem of off-gassing
seeing as I'm looking to start some high vacuum experiments of my own when the lockdown is over, and I've just been hearing a lot of conflicting stuff about aluminum being usable or not
@Ben Krasnow how did the spark plug feedthroughs work for you? were they sealed with a crushable metal gasket or o-ring? seems like a nice cheap trick
You can get away with more than what you'd believe reading the forums. Buna-n O-rings are perfectly fine, which is what I used to seal the sparkplugs. Pretty much any metal will be fine. Any plastic that smells strongly like PVC or "vinyl" tubing, should be avoided.
Good evening, @Andy Geppert ! I loved to play with your magnetic core memory touch-screen at the hardware happy-hour event in SF back in February :) (I am Simen, btw)
anyone else think it's worth reflecting on "citizen science" as it interacts with your neighbors' rights to safety though...
@Ben Krasnow , what vacuum levels were you hitting?
large rubber stops with needle pressed through was also used in some experiments
@Micah Elizabeth Scott well sure
Epoxy can be very good. Hysol 1C is known as a good vacuum sealant.
I believe that you can get low-off gas expoy.. they are just expensive..
@scanlime : thats common sense isn't it: don't do anything you can't reasonably assume is safe to the environment around you
@Micah Elizabeth Scott I do - BUT I also thing it substantially comes down to "safety first" - as long as you're conducting yourself rationally and mitigating risk for yourself, that naturally extends to others.
Torr Seal works well, but quite expensive. Still less expensive than off the shelf vacuum fittings.
i mean, yes, but i'm also just seeing a culture of "safety third" for this stuff a lot, and this chat hasn't been taking the "reflection" seriously it seems
Could this be an experiment? measure the different off-gassing of materials?
@Micah Elizabeth Scott Oh well - if you work at SpaceX, sure.
and point your particle accelerator only in the direction of your least favorite neighbor ;)
Micah, I take it seriously. My neighbors actually discovered my channel organically, so they know what I'm up to in, at least what makes it onto YouTube, which is mostly every project.
i mean, in my experience diy culture is full of folks talking a big talk about safety and then doing risky experiments in apartment buildings
lab safety 101: determine the risks (worst case) of your experiment and determine the failure modes of your mitigations
Ben Krasnow what would it take to convince you to do an AR15 build on the channel? :D
OMG..
Do mean risky as in harming themselves or others?
I'm not really into guns, but don't hate them either. It's just not what my channel is about.
Ben: what about Antenna projects?
:)
they aren't for everybody, but at a time when so many people are impulsively buying beyond their competence, it'd be nice to see level heads weighing in on them
christian: yes. i mean like producing fumes in enclosed spaces, producing x-rays in a dorm room, that kind of thing. it's a risk that people nearby don't know about or consent to.
Ben, is there an experiment or project you've been eager to do but have had to put off? Even a dream project.
Or another way.. what are your next big Projects in mind?
i'm not trying to be a pest to any one person i just see this celebrated a lot in the diy community- folks venting acid vapour out their balcony or whatever and the replies are all "lol sucks to be your neighbor" in a way which doesn't actually discourage this sort of thing at all *shrug*
I think guns are an interesting "ultimate beating swords into plowshares" industrial test case, if you can manufacture a modern firearm you can basically perform all of the precision operations that are necessary to also be able to make things like car engines and electric motors and generators. I'm not some crazy "everybody should have an ak47" nutjob but I also think they can't be un-invented.
Ashley, yes, an MRI machine ! Alan Yates and I had been planning it long ago. It's still on my list. There is also nuclear quadrapole resonance spectrometers, which are sometimes callled "zero field NMR".
yeah, the problem is that if you make a gun...well.. you have a gun. What use is that?
ben: what about building a DIY STM?
I'd rather have an electron microscope.
oh yeah an STM would be interesting, or AFM
what non-medical uses can such MRI scanners provide ?
eh? can be nothing but a fun bangstick in the best case, and used only for shooting cans, there's plenty of sports leagues for this stuff, IPSC and all
guns aren't magical violence wands
this isn't harry potter
i've seen some people claim to do it using COTS piezo buzzers
anyway, @Ben Krasnow any recommendations on the sort of TV to find that can make the best electron microscope?
Whitequark was doing some STM experiments with MLCC surface-mount caps. I don't have a link handy, but it was on hackaday
Ben: Are you open to the idea of a DIY community Projects?
I know I need some kind of CRT with an in place and not-discharged magnetic ring
you can use a gun to shoot a few balloons so you can descend https://en.wikipedia.org/wiki/Lawnchair_Larry_flight
@Ben Krasnow on the topic of citizen science, I really enjoyed your research on electroless plating. Did you find the circuits you produced to be robust enough to replace other home-produced PCBs? I recall you had some peeling issues, at least at some point
Or even Mentoring..
https://hackaday.com/2015/08/20/using-a-capacitor-as-an-actuator/ ?
I'm trying to work my way back into telescope making/optical fabrication, and an interferometer is on my list of todos.
I just built a face mask sanitizer using an old EPROM eraser UVC lamp
oh yeah also on the subject of projects, @Ben Krasnow do you have a github that you can put up so that people can build along or maybe even make submissions to?
Spencer, no. It needs more work to be ready for beta testing. I haven't developed it since presenting at Supercon.
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duuuuh thanks, I'm a googletard, lol
followed :D
@Mark VandeWettering - beats the plant pots I'm presently printing
@Micah Elizabeth Scott when I think about it I've seen some really stupid stuff that's dangerous to others/the environment. But on the other hand I think that most regulations are meant for commercial applications ie doint stuff all the time. So the causal chemist or the hardly used x-ray source should not pose a too great risk. but you are absolutly right I rather like to know it when someone is opperation an x-ray source nearby
Ben: Are you open to the idea of a DIY community Projects? Or Mentoring projects?
how much can you mitigate the risks of Xray stuff by either a) doing it in a basement with shielding over the top so that it's insulated by the earth, or b) doing some kind of rammed earth arrangement to bring that 'earth shielding above ground' in something like an earthship?
if everyone believes they're not doing "too much harm", you make a lot of collective harm
Mike, I guess it depends on the project specifics
also speculating on the exact intention of laws seems dangerous
shiz, the problem is that if everybody can do 'no harm' nothing gets done
*citation needed
I am back.
Can we make a Proposed Project Web Site?
that's a rather sweeping statement without any backup
so was yours, lol
I agree you have to not be short sighted on what do do with waste products, what electrical emissions you are producing, etc.. that's a being good to yourself, your neighbors, and the planet kind of thing. A lot of people don't think of that. Can't just dump random chemicals down the drain type of stuff.
@Kendall Meade http://www.radprocalculator.com/Gamma.aspx is excellent for working out dose rate calculations
Take in Idea's and choose?
noice, thanks phil :D
Mike, yes I started a reddit for the purpose of voting/generating project topics. It's been a while since I checked in...
oh really? wow..
do you have a link.. or would a different forum work better for you..
electrical emissions are worst on low frequencies and long wires - the higher the frequency, the less problems in the long range
https://www.reddit.com/r/AppliedScienceChannel/
r/AppliedScienceChannel
r/AppliedScienceChannel: Discussion area for the Applied Science youtube channel.
I can't even remember my login?
lol
@Ben Krasnow What tools/methods do you use to track progress in your projects?
don't feel bad I've been on reddit like 10+ years and I can't remember mine eitehr
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