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diy - DIY & Electronics

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 No.1400[Reply]

Have any of you ever taken die shots?

How expensive of a hobby is it?
What equipment should I use?
How could I even begin to understand the chip logic that these shots capture?
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 No.1401

You need a very good camera and a heat gun I imagine.

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 No.1402

>>1400
Nitric acid?
https://www.youtube.com/watch?v=mT1FStxAVz4

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 No.1404

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>>1400
Macro photography... DSLR or EVIL (Electronic Viewfinder Interchangeable Lens) camera;

You do use m43 system, r-right... as its the most flexible, portable and cyb camera system out there... as camera SYSTEMS go this is as close to open source as it gets - as in it fits near any lens and has many different manufactures making for it not just 1 or 2 like CaNikon!

Also m43 has some advantages with macro shooting... more dof than a ff or aps-c sensor and a grater zoom (magnification) for a given lens length.

First off a normal macro lens wont be powerful enough, 1:1 in macro lens speak means the image projected on the sensor is the same size as the thing your looking at... 1mm object will project across 1mm of the sensor!

You can get a 5:1 macro (only for m43), this might start getting there ($$$):
http://www.yasuhara.co.jp/nanoha/index-e.html

Failing that the way to step up your macro game is with some macro extension tubes (~$10)... these move the lens further away from the sensor, allowing a much closer focus point, works well with a moderate zoom e.g. >100mm.
http://www.cambridgeincolour.com/tutorials/macro-extension-tubes-closeup.htm

Post too long. Click here to view the full text.


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 No.273[Reply]

I've been thinking about getting into chemistry. But every time I think about it I ask myself, "what are you even going to do?" So, what are some cool things to do in diy chem to help inspire me?

Also chemistry thread.
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 No.1382

>>1372
Bubble it through hydrogen peroxide solution instead of water. This will aid in the oxidation of NO2 to nitrate.

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 No.1383

>>1382
Also don't taste it. Buy litmus strips for christ sake.

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 No.1384

Acetone Peroxide OP

Dooont drooop itttt <3

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 No.1397

>>1384
The mode by which acetone peroxide explodes is pretty neat. Supposedly it generates no heat during the explosion. Anyone know of any papers that go into more detail about entropic explosives?

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 No.1399

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>>280
I second this. This was the primary motivational book for David Hahn. He built
a nuclear reactor at the age of 17.


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 No.1248[Reply]

So I'm in the dorms at a US college and since I'm pretty nerdy and socially awkward like most of us, there's really no opportunities to get alcohol until I'm 21. So I decided to take the DIY approach.

As somebody who has never brewed anything in his life before and just had the internet, I decided to get two S bend airlocks (with included bungs), some 5g packets of Red Star champagne yeast, and some big containers of juice.

I poured out a bit of the juice from the bottle, and a gram of yeast was measured out and poured into the juice. The bung was inserted into the mouth of the bottle and the S-bend (with some water inside of it) was fitted into the hole.

A day or so later it started bubbling, and after 9 days of brewing, the grape juice turned into (pretty shitty) wine and the apple juice into mediocre cider.

My test subjects rated (based on taste) the grape juice as an average of 2/10, and the cider as a 7/10.

Since I'm doing this sort of brewing completely blind, and obviously don't have the sorts of resources to do anything more complicated than this, I just wanted to share this little project and maybe pick some of your minds for some more advice. Let me know what you think!

Pic obviously related.
16 posts omitted. Click reply to view.
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 No.1355

>>1354
So if you, for example, buy 12% cider yeast (if it's specified, mine is just 'cider yeast'...) that'll make precisely 12% cider and any excess sugar will be added to the sweetness of the drink?

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 No.1356

>neurosuggesting making your own alcohol without a recipe

kids nowadays will do anything.

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 No.1358

>>1355

Yeah, that's pretty much how it works with my Ginger Beer, so I imagine that's how it would work with your cider. But, and this is a bit but, 12% ABV is kind of a lot, for cider. Spicy (as in cinnamon/ginger) might be better than sweet, for that.

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 No.1361

>>1347
OP here, thanks for the tips and the textfiles link. I'll have to look into that.

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 No.1385

http://homedistiller.org/
Has a lot of info. Also check out the forum.
Discussions on vacuum distillation are quite interesting.


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 No.633[Reply]

Hello lainons!

Anyone else ever done any blacksmithing before? I did about a year and a half ago. I took an introductory class that taught us the basics. It was quite fun!

I thought I would make a thread showing one of the things I made, and also to to have a general blacksmithing thread. I will also be posting a few PDFs.
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 No.658

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I've never done any actual blacksmithing but I've read a ton of books about it, my favourite being The Art of Blacksmithing by Alex W. Bealer which has some really nice illustrations.

Sadly I don't have the cash for much charcoal at the moment, but I've got a 70 lb anvil tucked away and made my own clay forge. Next I'll make a double-chambered bellows (I'll upload some images if I can scan them next week).
A good vice can also serve as an anvil, but they don't have the curved horns. Plus most of the hand tools you can make yourself.

If anyone here goes to renaissance fairs you can usually find a blacksmith or two doing demos. They generally enjoy helping people get started, at least in my experience. Last time I was there the smiths were hammering flat pic related into little swords for $1, and they sold close to three boxes of nails in a day! You can also find some clubs set up here and there, though there aren't many.


>>639
Did you get to see any big trip hammers at the class's workshop?

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 No.1225

>>658
Cool! How did you get your anvil? And, if you bought it, how did that work out?

>Plus most of the hand tools you can make yourself
Have any PDFs about making said hand tools?

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 No.1230

>>1225
https://www.youtube.com/watch?v=jBVa2bw3r_k
Shows how to make kind of a forge. According to a blacksmith I met, the forge is totally ok (he used that for a long time), but his blacksmithing technique is soykaf .

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 No.1232

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I made the messer in this picture. It's crude but it was my first attempt at something that complex.
I was mostly making hooks, litte tools out of rebar and little knives out of nails before that.
You can see one of said nail knive in the picture.
>>637
I like doing this kind of twisted thing. It's not that hard but it's very satisfying.

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 No.1376

I made a candlestick in high school who I gave to my parents as a christmas gift. Pretty awesome it was.


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 No.1319[Reply]

I thought you guys might appreciate this:

http://www.techworm.net/2015/10/working-thors-hammer-build-by-engineer-that-only-can-be-lifted-by-him.html
1 post omitted. Click reply to view.
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 No.1333

>>1330
I doubt that there's much practical use for this. It's more of a trick. What would you even wanna use it for?

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 No.1334

>>1333
The only application I can think of is to stabilize large machinery or household appliances to the floor without drilling or cementing.

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 No.1345

>>1333
You could leave a suitcase in a public place where someone else needs to get it. Calibrate it to them and then nobody else can take it. Same would be good for purses or any other object that would be in a public place and also of value.

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 No.1371

>>1345
sounded stupid at first but most people wouldnt attempt to just break into it in a public place it looks too strange.

still if it was anything important inside you would want to lock it up still and maybe use something more durable than a suitcase.

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 No.1403

>>1345
Sure thing ahmed, not a chance on earth that your suit case is detonated by the bomb squad and you and the other person put on a permanent watchlist. Just your regular friendly neighbor leaving this case here because reasons, officer ;)


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 No.1370[Reply]

we can have a thread about mechanics how cars, motorcycles and industries.

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 No.301[Reply]

Makeshift or improvised weapons are /cyb/ as Hell.
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 No.1363

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>>1362
You mean this.
It doesn't seems too doable since the case would need to be extremely tough an the electronics packed in a tight space.

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 No.1364

>>1363
Not exactly. Imagine that the actual taser was strapped to your arm and you had some cables extend the current to your knuckles. The electronics would be safe from the beating and you could make it so that it only activates when punching something. I'll draw something later and updload it, maybe it'll be clearer that way.

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 No.1365

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>>1364
Power fist lainon here. Image related is a crude design of what I meant. Let me explain it a bit:

The left part is what would be the "fist". You can see it's attached to the knucles. Inside the box there are two spikes that will be the ones delivering the charge and a red button that will activate it. When you throw a punch at something, the non-conductive part on the left comes inside the bigger one, pushing the button and activating it. At the same time, the spikes are revealed and shock the punch receiver. Once you stop making contact, some springs separate the two parts of the box, releasing the button and therefore deactivating the taser. Also providing some protection for the spikes.

Also to be noted, the gray part separating the box and the knucles is some padding to relieve some pain. It's easier to punch foam than something hard like plastic.

The black box on the right is the actual taser with a battery inside, and it's connected so that the blue cable deals the blow and the green one activates it.

Considering this design: do you think it'd be safe to wield this? What changes would you make?

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 No.1366

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>>1364
Nice, I didn't think about that, just machine a block of hard but non conductive material, add a microswitch going to the circuit and the high voltage cables coming from it going to the spikes. Make sure you use plenty of shrink tube and the appropriate voltage rated cables.

I also thought about doing a taser jacket, which is even more dangerous for the wearer, with exposed wires running down the sleeves and switches at the ends. Normally when somebody wants to restrain you they grab you by your arms, with this jacket that won't happen. The problem is you would need to insulate the whole sleeve and you might also want to put the exposed wires on the exterior so you don't shock yourself if you bring your arms too close to your body. Also it won't work when it rains for obvious reasons.

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 No.1367

>>506
breaking boxes and defending yourself from an attacker are two different things. very slight differences in handling can make a huge difference.


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 No.1342[Reply]

I have two Sun Sun Ray 1G 102 thin clients. What should I do with them?
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 No.1344

Quick, cool, low power terminal?
Tor relay?

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 No.1357

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media player to stream over network

xmbc maybe?


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 No.1324[Reply]

Has anyone any experience of this? What do you think of it? What kind of people are they suited for?
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 No.1337

I dropped by the one in my town, tucked away in the basement under a shopping plaza. From what I saw, the local focus was hardware, though I saw a whiteboard with a schedule of workshops for programming and webdev. I feel like I could learn a thing or two there, but there's a membership fee and I'm too busy with my last few semesters of university to spend enough time to be worth the money. Do hackerspaces usually have a sub fee?

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 No.1343

>>1337
That sounds like a fun hackerspace! They should let in a 1337 one like you with no membership fee.

Sub fee? I know that a decent amount of them give university students a discounted membership price.

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 No.1348

>>1337
A fee is pretty normal. They have to pay rent and electricity.

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 No.1349

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>>1343
>They should let in a 1337 one like you with no membership fee

mfw

But yeah there is a discounted student price. I may try it out if I survive this semester.

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 No.1352

https://sudoroom.org

This looks great!


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 No.1296[Reply]

I find very cool electronic but do not know where I need to start, where to learn, etc. Lains could help me?
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 No.1299

>>1297
>>1297
I'm talking about making circuits using diagrams.

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 No.1300

I'm a noob myself but you should get a book on the basics of electronics, a bread board, a hand full of parts and then start trying things out while working yourself through the book. A multimeter could also be useful.

Currently I'm using Practical Electronics for Inventors. I can't really say if it's bad or good but it's been recommended often and I think I'll be fine. A good book for later on is The Art of Electronics. But this one should really interest you later more as a reference book.

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 No.1311

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Here ya go:
http://ocw.mit.edu/courses/#electrical-engineering-and-computer-science

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 No.1318

>>1296
>>1300

I'm not a godlike by any means at electronics. But here's some stuff to help you out.

Don't cop out with modular soykaf .
Practical electronics for inventors - Good book, theory heavy, but covers the characteristics of almost everything.

The Art of Electronics - Now in it's third edition.

EEVblog - One of my favorite youtube channels pertaining to electronics. The guy is totally passionate about what he's doing. https://www.youtube.com/user/EEVblog

Make Getting Started With Arduino - Because modular is easier.

The equipment you'll need off the bat isn't that hard to find. But there's a few kits on amazon that will get you started.
Post too long. Click here to view the full text.

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 No.1350

I use the Navy Electrical Engineering Training Series (NEETS)

http://jacquesricher.com/NEETS/

Just use wget to grab the pdfs
The HP seems to be interesting anyways.


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