how strong are shipping containers when they stand verticaly? how unstable would it be if you had two 40ft ones stacked on top of each other? because if it was relatively easy, you could make a super badass tower pretty cheap.
I want to build a centrifuge for projects and kitchen stuffs, I've got a few options over spending $300-$3,000 on a professional one.
I'm not skilled enough to buy the rotors and circuitry so this is a superficial DIY- buy something that spins like a dremel or blender, and either botch it or in the case of the dremel, create an attachment. I can do the attachment part myself, some tips and ideas are welcome but my main thing is I have two concerns:
leaving a dremel on for 5 or more hours at 20,000+ rpm, good or bad?
Dremel has less torque than... Comment too long. Click here to view the full text.
>>920322 400ml of fluid is over half a kilo to spin. With a dremel or the like that means balancing needs to be done properly. Try to figure out an attachment and balance it very well maybe with the cell phone method where you run an app and adjust the rotor accordingly. Using falcon-sized centrifuge tubes also means the tubes need at least to run at an angle, preferably with a pivoting attachment so that whatever you are centrifuging won't wash out from the bottom when the centrifuge stops. And with larger tubes the... Comment too long. Click here to view the full text.
>>920355 I'm not sure what the cell phone method is but thanks for the info. I didn't like the 3d printed version because it has no pivot and doesn't allow for the vile to rest, which are both safer and more efficient.
if you could help me out one more time before I hurt myself, I was wondering how a string or chain would fail to balance perfectly, so long as the speed was adjusted slowly enough for it to not wrap around whatever the spindle would be?
in other words, viles A and B were attached... Comment too long. Click here to view the full text.
>>920497 Try searching for it. Balancing cell phone app rotation or whatever you know the drill. There is at least one instructable about it. I got seriusly drunk between posts so I'm trying to follow your train of thought before I forget this thread. One problem with a string/wire approach might be turbulence or wobbling. The centrifuge tube might wobble during rotation in a way that you can't see/measure it. I'm not sure if this is an issue but consider it. Wobbling would prolly reduce the effectiveness of the g's you are trying to achieve. A fixed stand for the vials might eliminate the risk of problems like this. I'm a molecular biologist so I have hands-on experience with these machines but no clue about designing of them. Off to sleep, fuk I'm fukt.
Hey /diy/, need some input on what the best way to handle this situation is.
The connection to my car's battery is really spotty. I've never seen battery terminals like this, and they're rusted so bad that they pop off of the battery leads. Anything I should know before I commit to desperately sawing them off and soldering on a new set?
There's a 3rd small cable coming off of the positive lead too, dunno if that's supposed to be the ground or something unrelated.
>>920295 No to the solder. Like the other anon said, they sell bolt on ones(basically what you have) that you can tie every thing back in on. The extra wire coming of the positive is absolutely not a ground. Ground will be the negative. Don't change any of the wiring unless you have to, run it exactly how it is. That other positive wire probably runs to the back of your alternator.
Some of the new cable ends come with spots to clamp down smaller wires, some do not. If the ones you get do not you'll need some... Comment too long. Click here to view the full text.
>Post and discuss /diy/ projects, ask questions regarding /diy/ topics and exchange ideas and techniques.
I do metal work with a little wood work but my dream is to run treasure hunts. I've done a few before that ran from one single website but I wan't to create something different, something you have to solve on the move.
I want to do scenarios like kidnapping and people have to follow the clues to find the victim, it'll all be light hearted, but I need ways of getting across clues, the move basic is QR codes, which... Comment too long. Click here to view the full text.
>>920181 i've been told CFM is the most important for most tools. that one is only 2CFM while most impacts i've seen take at least 4 CFM. also other tools like grinders quickly jump up to like 10 CFM and at that point you're getting into $1000 compressors.
maybe i'm just missing something but it seems like these tools take way too much air for what they do.
I'd like to start up a new soap general because I have just recently started back into it. However I am a dumb nigger and don't seem to have soapdad's recipe sheet.
Let's make the opening theme of this one about how to help dumb idiots like me not fuck up.
I have done two batches so far, and I did them both the same way.
I tried to make castille soap. Just olive oil, lye (NaOH), and distilled water. I followed instructions very carefully and used brambleberry's lye calculator. Additionally, I ensured that the lye water and oil... Comment too long. Click here to view the full text.
Because the parts are probably expensive and require greater engineering knowledge to assemble than is available on a diy forum. You aren't going to get a bunch of shit from your local hardwear store and make a hovercraft u nerd lmao
>>920150 They just aren't efficient enough to be practical. Fuel is heavy, and anything that uses ground effect uses a lot of fuel to stay airborne; physics, unfortunately, works, and in this case it works against you.
Hi /diy/. I'm doing a capstone project next year for my last year of mechanical engineering, and I'm having trouble thinking of what to do, so I was wondering if creative minds such as yourselves could throw some ideas out there.
Here's what I know: mechatronics (microcontrollers and whatnot), cars (very well), machining, PID control, and other basic engineering stuff.
Like really I'd like to make something with a humanitarian purpose or could be turned into a business idea, but if you had an idea like that then you'd be doing it yourself haha.
An actually affordable assistive exoskeleton using 3d printed parts for people who have limited mobility? (Possibly feeding from a wall plug so they can at least walk around their home, unless battery issue can be solved)
A better voice modulator for throat cancer patients that doesn't make them sound like a dalek? (Not sure if that would fall under your area of expertise)
A portable, but still effective jaws of life system (think small enough it could be tossed into a glovebox or doorwell of every car) to avoid waiting for emergency services in a critical situation (potentially dangerous for untrained, possibly include warnings on casing)
Possibly some form of hydraulic "talon" to be mounted underneath a vehicle in case of brake failure in cold and icy weather? Something that senses when the car is still sliding and goes "fuck, time for plan c"?
Let me know if I'm remotely close to the mark or way off, I'll think of more. Have not done anything with mechatronics and am certainly not by any means an expert.
Keep in mind that using any type of wood other than pine becomes very expensive, very quickly.
Personally I'd frame it with whatever studs you can find for cheap in the walls, use 2x6 yellow pine for the ceiling and floor joists and insulate the walls/ceiling/floor. R13 insulation in the walls, R19 bare minimum in the floors/ceiling. 2x4 studs costs like 2.50 at Lowes for an 8 footer.
Use something like wood beadboard panelling on the inside, maybe some rough-sawn... Comment too long. Click here to view the full text.
Since you want to do a wooden door, you might want to get an idea of what kind of door you want.
Solid wooden doors are also pretty expensive, so you could make a wood door out of boards like pic related but it would have near zero insulation value. Plus, framing a door to where it has a decent fit and wouldn't leak air all around it is very difficult unless you're a really competent carpenter.
Same... Comment too long. Click here to view the full text.
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