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File: -cold-rolled-steel-sheets.jpg (31 KB, 500x375) Image search: [iqdb] [SauceNao] [Google]
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So guys I have a project in mind but it involves some steel cutting. Problem: I don't have any power tools (torch cutter, plasma cutter, angle grinder, etc.). Is there a simple way to cut steel without these instruments?
>Pic not related those aren't the plates
39 replies and 4 images submitted. Click here to view.
>>
short answer:no

long answer: yes, with very very heavy manual labour for a couple years.

rent tools or don't ask dumb questions.
>>
>>925442
Yes, you can cut steel with a Hacksaw.

It will take a very, very long time, a lot of sweat and a bunch of Hacksaw blades if you have any significant amount of steel to cut through.

Rent/buy a cheap angle grinder FFS. The only way a Hacksaw comes out cheaper is if your time is 100% worthless.
>>
>>925451
If it's more than 2mm thick don't even bother trying.

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Question:
Drive 30 minutes round trip and pay £18 for metal £1.04 fuel cost

or to save £5.50 on price

Drive 2 hours round trip and pay £12.47 for parts £2.80 fuel cost

It's exactly the same part, the closer company buy it from the larger company further away.

£3.74 more but save one and a half hours of my life on the boring fucking motorway.

Also I'm making a welding bench, any advice?
1100mm high (i'm 6'4" with a bad back)
1600mm long
1000mm depth
14 replies and 2 images submitted. Click here to view.
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Is your time worth £2.50/hour?
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>>925429
Is it worth £3.74 not to drive for 2 hours?
Yes it is.
I don't know where you got the £2.50 from but yes, i've sooner do nothing and pay £2.50 than drive for an hour, even though i'm a taxi driver.
>>
>>925429
Not to mention wear on the vehicle. This is a penny wise, pound foolish way of thinking. If you really want to save money move to an apartment that's $100 cheaper a month, save $1,200 annual. Quit worrying about $5 is retarded.

File: IMG_20160104_164751.jpg (313 KB, 1024x768) Image search: [iqdb] [SauceNao] [Google]
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ITT- the ultimate trailerable catamaran!

Please help me with suggestions, drawings, etc.

I live in a landlocked state, but the sea calls to me. So I figured I'd try to design a catamaran.

I'd like help, pls!

My biggest question right now, is can it be a flat bottom? All the designs for trailerable catamarans I've seen have rounded, contoured bottoms.

I've got plenty questions, I'll get into those later.
75 replies and 37 images submitted. Click here to view.
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Here are towing regulations in all 50 states.

You'll notice in my OP picture, the rectangle at the bottom is 40 squares long and 13 squares high. That represents the maximum side profile I have to work with. The square at the top left is the maximum frontal profile. Each square is one foot.

At the bottom left is a line 13 high beside an L shaped line that's 7 high and 3 across the bottom. That's how big my doors are to the backyard and I put those there for scale.
>>
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Here's one of the better trailerable catamaran layouts I've seen. I've got a couple I use for inspiration.

The main problems to me are the hulls are too short. I'd want standing headroom for almost the entire length of the hulls.
>>
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I believe this is a picture of the catamaran from here >>924985

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Any tips on saving on electric?

>HVAC was replaced in 2014
>keep most lights off when I'm not in the room

What else?
36 replies and 4 images submitted. Click here to view.
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>>923452
well it all depends
where do you live?
somewhere hot? ac is expensive, blow up a paddling pool infront of your sofa to steep your feet in to keep you cool
somewhere cold? wear a jumper. if your heating is even electric.

insulate your house. double glazing, blinds, heavy curtains. curtains over doors. how many rooms/floors? heat/cool a smaller area, live in a bedroom if necessary. keep other doors closed to help insulate from the outside

what electric do you use?
lights? switch to cfl/led when...
Comment too long. Click here to view the full text.
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>>923469
Fuck. I guess your right, thanks though for the info
>>
>>923452
electricity is cheap, after the big saving things like adjusting thermostat and turning down water heater. your time is better spent making more money than saving on electricity

File: 20160109_195121.jpg (4 MB, 5312x2988) Image search: [iqdb] [SauceNao] [Google]
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Okay, the goal is to use this auto led bar for an aquarium moon light (preferably with a dimmer).

I did some calculations but I likely fucked up somewhere. The bar needs 12V DC and a maximum of 1A. I'm in America, so the outlet I'll be using is 120V AC.
6 replies and 1 images submitted. Click here to view.
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buyfag here

getting the psu from amazon will be much easier than building one from scratch (also probably safer, if you don't cheap out)
>>
I'm just trying to go the cheap route since I work in an auto parts store and can get stuff cheaply there. If I were to just buy stuff, I'd go ahead and buy an actual moonlight fixture
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>>927599
12v 1A power supply is like $4 on ebay. Do you really think you can get any cheaper?

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I inherited a pair of Marantz HD 660s from my grandfather.

I'm having some trouble finding some replacement capacitors with the same values, and I'm wondering if anyone might have some insight on removing the dials from the wooden case.
19 replies and 10 images submitted. Click here to view.
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>>
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This is the underside of the dial assembly in the front

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So I pulled this broken switch off of something, and I'm gonna replace it. however, I'm not certain if it's a pushbutton or a pot. Can anyone tell?
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>>927546
pot.
Tho you're gonna have to use a om meter to tell the value
>>
>>927546

it's got 4 connections, so my guess is that it's a pushbutton, similar to this, except the push-in part is recessed. if you press in the center, you might feel a click.

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So I'm building a table for /tg/ shit, and I want to put a projector inside to project whatever I need to show onto the table's surface. Then, of course, i'd put a layer of clear material over that to protect the projection surface.

The question is, what kind of material is best suited for this sort of projection? Is plexiglass or plastic better for protective covering? Would the projector take too much space?
29 replies and 3 images submitted. Click here to view.
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That's actually a pretty dank idea. You would need to shell out quite a bit for a decent projector tho, and especially important will be finding one that will focus at such a short distance (ie floor to surface of table). Plexiglass might be a good protective surface, but you'll need something semi-opaque for the projection to show up on, like a white sheet of some kind.
A (perhaps cheaper) alternative would be to put a big flatscreen into the table, but both have challanges
>>
I'd probably use a 4:3 flatpanel bolted under plexiglass in a way that it won't be load-bearing as to protect the screen itself. Any projector that can focus in that short of a distance is gonna set you back quite a bit.
>>
I actually work with projectors and surfaces on a daily basis, and I believe you could use anything white to project on as long as the room is dark enough. The covering for it would be best if it were very clean glass, but reflections are going to suck. You'd be better off just using a durable white surface that has a low-gloss finish. Maybe particle board of some type. If your ceiling is not at least 6 to 8 feet away then you may have trouble getting it to be a big enough image. But if it's closer then it will look better, so do some research on that matter and worry less about the table.

Pic not extremely related.

Has anyone got an idea for me of where I can find a jar-like container suitable for the following needs:
1. Not delicate (not like glass).
2. As near these measurements, but not lower than: 45mm opening, 150mm depth.
3. Strong sealing lid - so that the thin oil (Paraffin) I intend keep in it won't seep out.
4. Preferably transparent.
10 replies and 2 images submitted. Click here to view.
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>>925311
coke bottle? a little to deep?
old vasaleen tub, tooth paste tube if you clean it out well enough, not transparent though, you can buy plastic viles and plastic test tubes from ebay for dirt cheap, they have screw on lids... probably get 20 for like $10?
>>
>>925435
thanks for the comment; but those both sound too small, certainly the coke bottle. you might have mis-read the minimal measurements.

imagine a large jar (like those for pasta sauce or coffee grains); but with a very good sealing lid and not made of glass.
>>
Lava Lamp bottle.

Look for a stronger glass ( thicker borosilicate glass)

Or use plastic

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How to keep cast iron work tops rust free without much maintenance, and without imparting a greasy feel to it? I do a lot of /diy/ stuff on top of my table saw, it being the flattest and sturdiest surface I have. But even leaving a palm print on it tarnishes it.

Johnson paste wax - felt amazing to the touch, but barely any protection, tarnishing occurs within a few days and any moisture on the top would surely result in surface rust

WD-40/light penetrating oils - significantly improved protection, oily residue

I will not try a heavier oil or grease, because obviously despite being the best rust protectant, the surface has to be at least sort of clean to the touch. So basically, rust protection and 'feel' seem like inverse properties. Are there any substance that bucks this trend? Or perhaps, is there a good hard-coat that could be applied to bare cast iron to keep it dry to the touch, yet durable enough to work on and totally rust proofed?
49 replies and 5 images submitted. Click here to view.
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You could paint the top. The few thousandths of an inch error induced by paint won't affect woodwork.
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>>922581
Spray on carnauba wax maybe?
>>
File: renaissance wax.jpg (52 KB, 600x600) Image search: [iqdb] [SauceNao] [Google]
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>>922585
There's also this, which is supposed to be great, but it's pricey.

File: 20160109_170531.jpg (358 KB, 720x1280) Image search: [iqdb] [SauceNao] [Google]
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So I bought an enlarger head and power supply to use as a light source for my digital film scanning setup.

> pic related
7 replies and 3 images submitted. Click here to view.
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File: 20160109_170614.jpg (323 KB, 720x1280) Image search: [iqdb] [SauceNao] [Google]
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The setup requires a timer to complete the circuit and turn on the enlarger lamp. I don't have a timer. The timer plugs into the back of the power supply.

I only took a basic electrical engineering course in college so I don't know much about this. I'd like to avoid having to buy a timer. Could I use a spare electrical cord, plug it in the back of the power supply, and cut the other end off, connecting the positive and negative wires?
>>
Here is the manual for the enlarger with a connection diagram.

http://www.jollinger.com/photo/cam-coll/manuals/enlargers/omega/Super%20Chromega%20D%20Lamphouse%20Dichroic.pdf
>>
>>927489
OH wow guy, I just bought a Zenith BnW enlarger for my girlfriend.
She wants to build a dark room so I'm hoping to surprize her. A late new year sort of present.
However didn't get a timer with the unit. Its a simple little unit with a incandescent bulb in the top that just plugs in to a wall outlet.
I figured id just make an Arduino controlled timer with a relay switch and a timer.
But I haven't given it much thought yet.
I kinda figured i'd use a couple of buttons one prolongs exposures...
Comment too long. Click here to view the full text.

File: 20160109_110119-1.jpg (3 MB, 2008x2490) Image search: [iqdb] [SauceNao] [Google]
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Any way to get this off without damaging my shirt? Small black dots are part of shirt, but besides that Id like to remove the rest
10 replies and 4 images submitted. Click here to view.
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>>927323
we need to get some more information from you
what do you want to remove
what is it made of
what is the shirt made of
how did it happen
why do you want it removed
literally fucking any information at all
>>
>>927353
kek - was wondering 'wtf' myself, best guess, middle bottom be a bomb stain, but, difficult to tell. OP 4 stoner declared, prob. forgotten starting the thread already but.
>>
>>927353
>>927358
Stoner yes, sorry. Kinda made a shit post but I just wanted this stupid decal off. Feels...rubbery.. idk. Post tag in a sec

File: 2016-01-08_20.17.52.jpg (1 MB, 1249x1892) Image search: [iqdb] [SauceNao] [Google]
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Hello /diy/ I came across 19 omron relays. Some info
5a 240 vac
5a 28 vdc
Coil : 110/120 vacation
Are they worth anything if I was to sell them on ebay, and more importantly what are some things I could make with them?
11 replies and 2 images submitted. Click here to view.
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>>927144
Unless you have a hundred each of them it's not worth the bother, you'll get a few bucks apiece for them, and by the time you pay Ebay their jew money you'll have nothing or have lost money. Just throw 'em in your junk drawer in case you need them.
>>
i also have a few semiconductors, correct me if im wrong; they will allow power to flow through them if they hit the right temp? so i could say put it in a room with a heater and have something turn on or off depending on how hot i get the room? (my dumb downed comprehensions)
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>>927162
What are they specifically? What are the part numbers?

File: 20160106_135046.jpg (2 MB, 2560x1920) Image search: [iqdb] [SauceNao] [Google]
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How do I make my patio next to my studio more inviting?

I was thinking adding a solar pond in the right corner with nice rocks. Add some flat bed planters or something.

Any pictures for inspiration /diy/ has would be much appreciated.
7 replies and 1 images submitted. Click here to view.
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>>926047
>more inviting?
free drinks?
>>
>>926047
Try sweeping, for one.

Decorating to a general theme also works wonders.
>>
>>926047
The patio looks like a pretty dark corner. The dark color of the wood adds to that. You might want to change that.
Also the column, floor and everything else looks dirty. Clean that and/or buy new patio furniture. Add plants or grow spices or stuff.

File: image.jpg (208 KB, 2000x1325) Image search: [iqdb] [SauceNao] [Google]
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Can I build a LASER to destroy one skin cell?

How about just the DNA in a cell?
56 replies and 9 images submitted. Click here to view.
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>>923474
>tfw can't tell if shitposting or not
>>
>>923476
It's important.

Thinking about skin cancer.
>>
You can not DIY a laser with that level of precision. You could easily make one that burns off small patches though. If you wanted. For some reason. That wasn't insane. I mean, you can do self surgery with a pocket knife too, doesn't mean it's a good idea.

You can not target the DNA without damaging the rest of the cell. That requires higher wavelengths then a laser produces, like Xrays or Gamma rays.

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