Archived threads in /diy/ - Do It yourself - 542. page

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The First idea is to place two 30mm fans directly above the cpu.

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The second plan is to place 80mm fan on the case

Last is to remove sections and replace it with mesh.

>>992975
>A bore of maybe 1"
So a 5 horse briggs

>>992975
Home shop machinist forums and model aircraft forums would be good sources of information. The bore you want is similar to some larger engines for model aircraft. Copy their carbs.

>>992975
maybe just buy a cheap one meant for a 100-200cc engine and adapt it?

Yeah, it is silly. I wish the Fed.gov would fund more research into phase change AC alternatives instead of banning known good refrigerants.

>>992720
As a poor fuck who can't survive over 75 degree temps without AC, I understand your frustration.

>>993745
Have you looked into a swamp cooler? It wouldn't work if you live in a humid place but beyond that it's pretty close to AC.

>>992688
My house is heated with radiators that use hot water running through pipes. It uses a bigass furnace that isn't connected to the water heater though, I doubt that a water heater would have enough juice to do the same. Plus you need to regulate the temp and pump the water through.

>>992688
They make timed water circulators you can put on the hot out, and it will circulate hot water whenever you have the time set to come on throughout the day.

>>992688
Calculate the number of BTUs needed to heat a room

How many BTUs can your water heater put out

Not enough.

There are radiant floor systems specifically designed for this kind of workload.

>>992562
burn them

>>992574
very helpful cunt

Go make some cool shelves, OP. Hopefully it'll be a learning process for you and fuels more creativity. Make something you'll at least be using, so it doesn't go to waste.

fix it

>>992459
The acid that leaked did not damaged the circuits?

Looks perfectly serviceable to me.

>>992350
I've built smaller trebuchets before. There are rules of thumb that you can look up for proportions that should get you in the ballpark. You should probably use a pullcord trigger, which would be easy to rig for specific spots for set distances.

Some fiddly stuff you should be prepared for: For best performance, a trebuchet should be "tuned". This means that the payload, counterweight, arm lengths, and sling are all working optimally together, and virtually all of the counterweight's gravitationally energy goes into the projectile. The arm of a perfectly tuned trebuchet will stop in a vertical position as it releases the projectile, with no swinging. The angle of the pin is what determines when the sling is released (which is generally the best way to set distance, since the right sling length depends on the arm.). Make sure you can adjust it to dial it in, but once set it won't budge. For consistency, make sure the sliding surfaces are smooth and clean. Trebuchets aren't exactly precision weapons, but attention to detail can make a big difference here.

If you're going for max range, you'll want all the weight you can fit in 9L, which means solid metal counterweights. Steel or iron would be decent (70kg). Lead would be better (100kg). Tungsten or depleted uranium would be much better (170kg). For an egg, this is a vastly disproportionate weight, and engineering the arm for that will produce some odd proportions.

170kg of tungsten is around 20 000 dollars.... steel and lead are more feasible. The sling pouch design will the most critical part as it needs to distribute the acceleration forces evenly on the egg and release the egg cleanly so it doesn't break up at that point. Its definitely going to take some time to optimize the machine for maximum range.

>>992375
>170kg of tungsten is around 20 000 dollars
You didn't give a budget. Some people spend lots of money on competitions like this.

>The sling pouch design will the most critical
Probably not. I've never had any issues with any slings. Most any soft material will not break the egg (trebuchet accelerations are very gentle as catapults go), and unless the sling grips the egg like a glove (it shouldn't - cup it just enough so the egg doesn't roll out the sides), there shouldn't be any problems with release (with the sling at least - as I mentioned, the hook can be tricky.) Maybe thin leather with cord sewn into the edges. I usually cup my slings by using two pieces of material, slightly wider in the middle, and baseball-stitching them together.

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Dimensions.

>>992274
Well, since you never asked a question in your post, I'll just stick to pointing out that this is a terrible design.

You have absolutely nothing on it which will make it the least bit stable. Put some form of bracing on it, otherwise all of the legs are going to rotate and twist with respect to each other. Put crossbracing (diagonals) connecting the legs together in the long direction, and at least put cross bracing on each end in the small direction.

Also, the bar you have connecting the legs together near the bottom is the least efficient option you could have. The bar isn't making the legs any stiffer, you should really have two bars, one on either side.

If it's fully welded, it will have some stiffness, and might get the job done for what you need it to do (maybe) but it is still a bad design. You could get the same stiffness at a fifth of the weight if you make it better.

Sorry if that sounds harsh, but if you are considering bolting it down, it sounds like you need it to be good, and the bottom line is this needs work.

I think it's overkill unless you're gonna be taking apart a V8 on it or something, but as anon says
>You could get the same stiffness at a fifth of the weight if you make it better.

>>992163
Plaster and water. Or maybe joint compound and water (I've seen it cheaper than plaster).

Both will be cheaper and stronger than either of your options, and will last longer.

Google stolloween ffs!

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>>992163
use flour or corn starch only for a VERY short-term project. Like, a few days, a week at most....
Once the bugs find it, there will be no stopping them and you will have to throw the whole thing out.

And I thought that corn starch was solid?... I am USA and work for a grocery store chain, and don't ever remember seeing liquid corn starch
besides, you can just add water to it anyway.

pic unrelated

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maybe I'm missing something but why wouldnt you just build a normal bedframe and store the boxes underneath?

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>>992162
I like the look better. Also my floors are carpet and the boxes wouldn't be as easy to slide around. They are that multilevel carpet stuff that was popular in the 70's and 80's. Thats what I do now and its causing the boxes to come apart. They are only made of cardboard. Picture related.

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>>992156
this is the IKEA FLAXA

no dividers, just 3 walls and a single, huge open space.

The walls are 1" particleboard (MDF) and its plenty to support the weight of 2 people.

>>991979
Was it really too much effort to check if your old thread still existed?
>>990730

I'm not sure I understand your goal. Are you using 2 stepper motors to move a point in a Cartesian plane from a given starting and to a given ending point?

Adafruit has a motor shield and library for controlling steppers that you could use. You really don't even need that though if you understand how steppers work and can get an H-bridge (L293 I believe is a good general purpose one).

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>>991979
>>991979
First thing that comes to mind is that two points do not make an arc on a plane. You need three points at least.

Take a look at the attached image, that's called midpoint integration. It does something different, but it gives you a nice set of vertical and horizontal lines that approximate the curve. The denser the rectangles, the closer the approximation of the curve. When they get really dense it'll stop looking like a bunch of corners and start looking like a line.
Now say that for the first 5 steps on x we need to go 7 steps on y. Assume you need both of these to happen in a given timeframe, e.g. one second. This gives you different step frequencies for the next second for axes x and y (in this example it's 5 Hz for x and 7 Hz for y). Feed that to the driver, run the motors at those freqs for one second and then recalculate for the next second and so forth. Perhaps if your resolution isn't shit it might work.

1st of all I'm not an expert, but why do you want to build cement house? Do you plan to move there permanently? I'm not sure if this type of house wuld be a nice place to be in, I would feel like in a bunker.

Maybe think about building log cabin first?
https://www.youtube.com/watch?v=QHXNWJj8cus

Ferrocement is bitchass, just make sure it's covered in good insulation against damp, both ground and ceiling/walls
Loads of windows a must (roofs included) - you will need LOTS of light not to feel like in a burrow.

Also, consider this - http://earthship.com/

https://www.youtube.com/watch?v=9-UawJo5blU&list=PL3F06C35DB74DBD2D

Build a cabin

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Close-up

>>991970
>>991973

Why do we have so many autistic dark souls item crafting build requests.

It's just some fucking stone. The sword will turn black and rust. Good luck making the sword.

>>991970
Make a sword with a nail, see this https://youtu.be/ii0C3j1ZZvk

Tig weld or rivet.

>>991896
The joints on an aluminium computer case are usually done with rivets, it's probably the easiest way to do it (just drill a hole in the two pieces, get a rivet gun and put it in) but it's semi permanent (you can drill them out, but can't undo them like a screw or bolt)

As for making the form, the tool usually used to bend aluminium sheeting is called a "Brake" but it might be a bit costly for you, especially if you only want it for this project, you might be able to rent one or find a workshop that will let you use one (maker space or something, I dunno) if you type in "bending aluminium sheeting" into google there are a few "diy" methods, but I haven't looked into those.

>>991950
It would probably be more economical for OP to design a case in CAD and get it fabbed instead.

I plan on doing something like that over the next few weeks for my own things.

At least 10x20 ft, I'd go for 20x20ft at a minimum if you're building furniture.

as big as you can afford and legally allowed.

You can build tables in normal sized garages, it's all about space management.

>>991887
Could you elaborate? Why do I need more than 20 by 20?