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File: IMG_0173.jpg (581 KB, 2000x1500) Image search: [iqdb] [SauceNao] [Google]
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How do I take the backing off these cuff links?
They were made from Japanese menuki. The backing is silver.
Any help would be appreciated.
11 replies and 1 images submitted. Click here to view.
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>>908207
Uhh, with a soldering iron capable of melting silver you dense tripcunt fuck..?
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>>908210
I don't want to damage the menuki.
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>>908212
Gee, I wonder how they were able to solder it to the thing in the first place then. Cause you're the expert about what will and wont damage it. Maybe the heated the silver solder with the power of bushido.

So I have somewhere in the range of 5500 fake dollar bills. The intention was to use them for a halloween costume but they showed up a bit late.

One idea I had was to make coasters out of them, encased in an epoxy or something, but I have no idea what I'm talking about. Anyone know how I would do such a thing?

They are just regular paper and don't look all that much like real money.
19 replies and 2 images submitted. Click here to view.
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>>908160
put them on cars. On the back write "sorry I dinged your car" and leave your number. Post results.
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>>908161
They're like half size, it wouldn't fly.

That being said, would be great if I don't actually ding their car
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>>908160
probably the easiest way to do that would be to make a small stack (like 8 bills stacked 2x2) and then paint them with a clear finish, like lacquer or polyurethane, a few dozen times.

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Hi, this is probably a stupid question. I'm looking to paint a piece of furniture that's made out of wood. I don't want it to look like wood anymore?


I honestly have no idea? Wood filler? many layers of paint?

I'm so clueless.
14 replies and 2 images submitted. Click here to view.
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>>908007
sand it as fine as you can be bothered
then just paint it. follow instructions as to primer/undercoat
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>>908012
i just discovered this stuff called lacquer
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>>908007
Seal, sand, prime, sand, paint, sand, paint. Once you sand the paint, you'll have a perfectly smooth surface that you can paint. Maybe use a spray for the topcoat?

I'm not sure how well your disguise will work though, because wood has the general shape of wood, most furniture is made of wood, and people know furniture is made of wood.

File: BuzzBox.jpg (3 MB, 3264x2448) Image search: [iqdb] [SauceNao] [Google]
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sup /diy/,

I tried /o/ but they keep telling me (an anon with bugger all wrench time and no real space to work) to just do an engine swap. Well, one guy does, no one else is responding. to keep this TL;DR check out the details on /o/, will repost here if and when that thread dies.

>>>/o/13946618

Long story short, I think it's a blown headgasket but before I commit to buying tools and parts I would like a confirm, or at least some suggestions of other things to check before I go pulling the head off. There is no...
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56 replies and 9 images submitted. Click here to view.
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>>907807
it could be a cracked engine, which you are fucked and needs to get it tested
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>>907809
That's.. Ambiguous..

Considering the leak appears to be at the top of the engine, would a compression test confirm that? Engine runs fine otherwise, delivers power as it should across all RPM ranges, I imagine a crack in the head/block would have an impact on that.
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>>907810
no one can tell you what is wrong unless you do a test, there is no magic over the internet can tell you without it

File: sponge.jpg (3 KB, 160x160) Image search: [iqdb] [SauceNao] [Google]
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I want something like an arduino except with about 440 pins.
can i get an adapter for a rasberri pi?
95% of the pins only need to be output
61 replies and 7 images submitted. Click here to view.
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>>907736
why not just wiring 100 wires to one pin?
>>
no way you're gonna find this. it'll have to be shift registers, or a bunch of different mega boards talking to each other.
http://www.thekanes.org/2010/06/09/expanding-the-arduino-cheap-ways-to-add-output-pins-and-power/

or, if you want to enter the wonderful world of FPGA, you can get an Actel APA750 for about $1,000 dollars.
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>>907736
95% of the pins need to be input*

File: 183.jpg (28 KB, 500x450) Image search: [iqdb] [SauceNao] [Google]
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An experiment I want to do requires me light up a box with rainbow light which has frequencies of 380nm(Upper violet) or less to over 9000nm(Room temperature infrared).
It'd be most useful if it was radial, lighting up the soil with a junction between all colours at the centre and around that arcs of different colours.
Preferrably, the light energy will be independent of wavelength, i.e. for every watt of violet there's a watt of red.

It's a biology experiment, I want to put a simple plant (moss or algae) in a mutagen and see if it will create a form...
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51 replies and 4 images submitted. Click here to view.
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>>907558
that's gonna be tough...
from 380 to 980 or so you could do it piecewise with LEDs and phosphors, but specific wavelength lightsources are going to add up. Above that, you may need to go incandescent and filters... and I have no idea what you will do for filtered output longer than 2000nm. You're already talking about crazy expensive optics.

Stuff like a prism is not going to be linear or usable outside of the spectrum right around visible...
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>>907565
Does it become any easier if I forsake a smooth gradient, and instead go with a couple dozen sources of increasing wavelength?
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>>907569
Sort of, but I can't think of a way that's not hella expensive, so some other clever anon might have better ideas.

Like, you want to do what a spectrometer does internally. Except with really high power output.

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You guys know how its bad for lithium batterys to stay at 100%.

Most people leave they're laptops plugged in or its a hassle to keep plugging it in and out, also just taking the battery out can be bad in case of a power outtage you loose the date.

Why isn't there a thing to detect current draw and cut power when it reaches a certain draw ?
(li ion current draw tapers off near full charge, so it's likely to be able to detect battery %/capacity this way and cut it at 80% or so lets say)

Does noone need this or don't they even know they need it ?
24 replies and 1 images submitted. Click here to view.
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>>907475
It's fine for lithium batteries to stay at 100%. The only thing that effects lithium is the actual number of charge cycles. Good batteries track this and will report this. Your battery capacity almost certainty isn't going down outside of the expected further. I just replaced my Lenovo at 1800 cycles. It had gone from 7 hours to 7 minutes.
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>>907475
Your laptop also does what you're saying already unless its a shit tier white label china shit. It's called battery tending.

If your laptop loses the date without you're battery then you need to get the cmos battery replaced. It's a button lithium cell just like in a real computer
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>>907480
i guess ur in the second category of not actually knowing you need one http://batteryuniversity.com/learn/article/how_to_store_batteries

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Has anyone here ever looked into building a power plant for home use? I am looking into building either a bio diesel generator, steam generator or something in that order. Has anyone looked into or built anything like this?
27 replies and 5 images submitted. Click here to view.
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>>907473
>hire a company to dig an oil well on ur proprety
>down there its hot, dump water, comes out as steam
>??
>profit!
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>>907479
It's about 10 dollars a foot to drill here and the most anyone around can only drill about 200 feet. I would have to bring in someone from out of state, which would cost even more.
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>>907473
depends entirely on the resources you have available.

do you have a free flowing stream on your property?

do you have lots of sunlight or wind where you live?

do you have a large spot of land to build some kind of power generation?

whats your budget?

how much power do you want?

Started reading up on electronics about a month ago, reading a couple books that I got off tpb. I'm currently working on a battery tester, using a ИB-15 lamp that I found with some scrap electronics (pic related). However, I can't make heads nor tails of how to actually get the bulb to start glowing. The best info that I've come across is this page: http://www.radiomuseum.org/tubes/tube_iv-15.html, but like I said, I can't figure out how to translate this into an actual circuit. Any explanations would be awesome. I've already tried googling the terms...
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39 replies and 10 images submitted. Click here to view.
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File: iv15_02[1].jpg (49 KB, 800x600) Image search: [iqdb] [SauceNao] [Google]
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Another image of the lamp
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File: iv-15_pins.png (2 KB, 93x174) Image search: [iqdb] [SauceNao] [Google]
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>>906855
I don't work with tubes, but from what I gather by looking at that webpage:

Drive the filament (f+=2 f-=3) with 0.6v DC.
Apply 10 to 50 volts at the Anode (A)
Apply a 5 volt signal at pin G for indication.

Like I said, I don't work with tubes so I don't really understand what is going on, but I am pretty sure this is what they mean.
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>>906869
Does this tube not require a ground then? I understand that ИB-15 is used in logic circuits, but I've got a generic LED stuck in my head when I try to light it up, with a positive lead and a lead going to ground/negative

Hello all and happy holidays. I just moved in to a new house and my room has this huge hole leading to the living room and kitchen. The noise can be unbearable at times and the lack of privacy is frustrating. so I've been thinking of ways to cover up said hole that would block out some of the sound. I can't do any construction because we are only renting the house but i was thinking of filling it in with some sort of foam or Styrofoam blocks, then painting it or covering it with a curtain. any thoughts or advice is greatly appreciated.
19 replies and 6 images submitted. Click here to view.
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>>906753
If you want to go off the foam idea you should try measuring out large foam boarding and make what is basically a giant puzzle piece for your wall. Slide it into the wall and hang a blanket with a cool design on top of it.
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>>906753
use acoustic foam. Try tacking up a thick curtain on each side first, it may solve a lot of the problem. (It won't drop it a ton, but may be 10db is all you need.) If that doesn't work, then yes, use acoustic foam. It won't help a ton because drywall doesn't block sound very well either, as many apartment owners have found.
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>>906753

ok so thats not actually a bedroom... and also why would you rent a place that you knew had this feature, when you decided to use that "extra room" as a bedroom?

File: FLIR1634.jpg (101 KB, 653x237) Image search: [iqdb] [SauceNao] [Google]
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/diy/, make me aware of some basic thermography and how could I improve the situation.

The pic is made from outside. The windows are supposed to be new, triple glass. Northern Europe, so heat insulation is important.

You can see that there are three places that the heat is leaking from. Is this normal that:
1) the place you this gypsum stuff on the wall is where the heat is leaking?
2) the place where the window connects to the frane is where the heat is also leaking?
3) the place where the glass pane is connected to the frame is where the heat is leaking...
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16 replies and 1 images submitted. Click here to view.
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>>906623
>the place you see this gypsum stuff
quickfix

>frame
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>>906625
bump
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>>906623
it look slike where the glass meets the frame and the gap where the window closes.

the dar filler in the wall might be thinner than the rest of the wall OR the heat from the window gap could just be warming it up.
compare it with the sides if they are filled in a similar fashion.

just because its red doesn't mean its actually hot
the seals where the window closes will always be warmer than the rest because there is a gap
look at the scale, there is what 9C difference? at -4 you are doing pretty...
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File: 20151028_121640.jpg (1 MB, 2560x1536) Image search: [iqdb] [SauceNao] [Google]
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52 replies and 11 images submitted. Click here to view.
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No, I'm good. Thanks though, OP.
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I've got an OLD oudoor central ac unit that is leaking freon around the charging valves. Is it possible to replace the valves?

I have freon to charge the system, but do not have a way decompress the system and store existing freon in a bypass tank. That I can think of. I'd like to not waste everything in the system since the stuff is worth its weight in gold now.
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>>906438
Not falling for that again.

What are some good /diy/ YouTube channels? Can be carpentry, buildings, man cave/garage shit, living off the grid, etc.
68 replies and 9 images submitted. Click here to view.
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...
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...
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>>905762
>>905758

Could you at least greentext what each channel has?

How to make a lab at home? Specifically a biological laboratory. What do I need? and the security specifications. It is legal?
32 replies and 6 images submitted. Click here to view.
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>>905673
a biological laboratory?
>is it legal?
to do what?
look at your own faeces under a microscope?
sure.

>what do i need
money
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>>905673
if i want to do mdma?
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>>905673
I mean, if you have to ask you clearly have no idea what your doing so don't do it.
Heaving said that (and sounded like a total dyke) what do you actually want to do in the lab?
Is it an analytical lab, a research and test stile.
Owning lab equipment is legal as long as you don't use it for illegal activities.

File: image.jpg (1 MB, 3264x2448) Image search: [iqdb] [SauceNao] [Google]
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Check out this thing I found. It's a nice ~ 1.5'x1.5' mounting box and it had some ab industrial relays and a square d nema 0 in it. The things people throw away..
20 replies and 3 images submitted. Click here to view.
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Not that surprising. One man's trash etc. Good score if you need it.
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>>905085
just gonna end up in your hoard pile huh.
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>>905144
not OP but better off in his "hoard pile" than in a land fill you pretentious piece of shit.

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