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Archived threads in /diy/ - Do It yourself - 248. page
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File: 1444923478838.gif (2 MB, 500x500) Image search: [iqdb] [SauceNao] [Google]
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which one for noob?
I have some undesrtanding in electronics
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>>912244
Depends on what you want to do.
>>
PIC/STM: Buying a box of lego

Arduino: Buying a newer box of lego with those custom made weird looking bricks in there

RasPi: Buying a lego model someone else built
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>>912257
Forgot to add, in terms of purity it goes:

PIC -> STM -> Arduino -> RasPi

In terms of ease of use it goes:

RasPi -> Arduino -> STM -> PIC

And in terms of usefulness it is all equal because you use the correct tool for the job.
Sometimes you need to flash a PIC, sometimes you just need to throw a RasPi and some copy-pasted code at it until it works.

I'm a PIC man myself but in fairness I think that's because I got started before the arduino and raspi...
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are there any good public websites explaining the safe way to dig out the underground of a house? for a cellar, mostly. I've been searching around but googlefu is weak
15 replies and 2 images submitted. Click here to view.
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http://lmgtfy.com/?q=build+a+basement#
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>>912119
>le let me google meme

all of those results are for building underground BEFORE the house is built. I'm asking how to properly support a cavern under a house.
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>>912132
> i can't make a logical step from a suggestion.
> http://lmgtfy.com/?q=build+a+basement+into+an+existing+property

God help anyone who lives in that house..

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Can anyone recommend me a good wood burning kit and maybe any tips on how to start getting decent at wood burning?
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lady carrying an instrument stops a NYC cop and asks, ''how can i get to Juliards?''
cops answers, ''lots of practice!''
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>>911917
Protip: that's just a soldering iron.
>>
>>911957
So can I just buy a decent soldering iron and get two birds with one stone?

Sup anons

Car won't start. Toyota Avalon 2002. Battery replaced a week ago

When I try to start the car I hear a loud click and then everything turns off won't even try to start. If I wait like 10 min all the lights will turn on but when I go to start it same thing happens

Any help?
18 replies and 1 images submitted. Click here to view.
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obtain meter.
check battery.

- it aint rocket science, anon, Whydyi replace old battery?
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>>911494
Sounds like your alternator has shit the bed. Google up how to test one and see how you go.
>>
>>911494
Prob bad alternator discharged your battery?

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Hey /diy/,

I have never seen a thread about /diy/ related chemistry such as home laboratories, simple experiments, and amateur research.

I was wondering if that is due to either lack of interest or if discussing these things is a violation of the rules. Going to err on the side of caution regarding this until I get some response as to whether or not it's OK to discuss those sorts of things here.
19 replies and 3 images submitted. Click here to view.
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>>911363
Not against the rules, unless you want drugs and explosives.
Lack of interest is largely due to faggy restrictions and general terrorism & druggie paranoia.
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>>911374
Oh, and personal protection and waste management tend to be problems as well.
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>>911363

Three issues:

1.) Difficulty obtaining materials due to legal restrictions
2.) There isn't actually that much use for DIY chemistry. Other than household cleaning supplies and soap, I can't even think of anything off the top of my head that I'd need to do any chemistratin' for. Okay, well, I guess actually I made some copper chloride for etching circuit boards, but, other than that, nada. It's a fairly niche topic.
3.) It's kinda dangerous, depending on what exactly you're...
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File: PEg_cart.jpg (104 KB, 750x750) Image search: [iqdb] [SauceNao] [Google]
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Building a gravitational potential energy powered cart for a physics class.

Any advice on maximizing the distance to 9 meters or above? It would have been easy if I were aloud to use elastics, but I am not.

It also must be under one kilo, but that's manageable.

I'm planning on building one similar to the one in the attached pic.
39 replies and 5 images submitted. Click here to view.
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>>910218
Drop it off a 10m platform.
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Flywheel. 10M of string. Reducing transmission to wheels.
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>>910219
The weight? should have said this before, but the all parts need to be attached to the vehicle, and a 10m platform is too tall to be added to that.

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Remind me, folks.

After the apocalypse, what fuels still work for vehicles?
How long do they last?
What can be done to make them last longer?

No need to go into how to retrofit vehicles so that they can use other fuels, yet.
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Diesel engines can run on vegetable oil.

If you ferment sugar and then distill the liquid, you'll get ethanol which flex fuel engines can run on.
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>>909145
cars can run on wood too. Look up wood gasifier car.
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>>909145
Alcohol and biodiesel are the only practical ones you can make but holy shit it needs so much edible plant matter to make a little bit of fuel.

I think practically electric will be the best option.

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Which is it, /diy/?
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Which one has a cord?
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>>908670
you have to buy the adaptor that lets you plug it right into the charger
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When you're creative, $$$ don't matter.
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till the bailiffs arrive for the bills.
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>>908378
then creatively avoid them
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>>908383
Well, he's got us there. Pack it up, boys.

File: 2015-11-29 14.09.24.png (1 MB, 540x959) Image search: [iqdb] [SauceNao] [Google]
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A while ago I found this old old knife on my family's property. I'm trying to remove the rust (which is really thick) with lemon juice + salt and steel wool. I'm having some success, but is there any better way to do this? If anyone knows possibly the approximate age or manufacturer of the thing that'd be awesome.
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It also looks like there used to be some sort of name pressed into the handle
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Sandpaper.
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Update:
After more scrubbing there seems to be a logo starting to appear. Should be able to ID soon

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Hi /diy/ I'm working with gases and pneumatic tanks and I'm wondering if any of you have a lot of experience?

I want to experiment with co2 enriched horticulture.

My plan is to use a 24 oz Paintball tank with a low pressure regulator. The regulator limits the pressure coming out of the tank to 200 psi which is low enough for my electronically controlled gas solenoid to moderate. I want the solenoid to open when the co2 drops below a certain ppm. This is going to be detected using mq-135 gas sensors, one at the top of the enclosure, one at the bottom,...
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37 replies and 3 images submitted. Click here to view.
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I think you're going to need a bigger tank.
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>>907620
this is for less than 1 sq meter with controlled release.
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>>907577
Its readily apparent you have no fucking clue what you're doing.

A 24oz container of CO2 will only take up 13.5cu.ft of space at room temperature and sea level.

Using this small of a tank for anything other than a single plant in a small container would be pointless.

If this is for something hobbyist related, such as a mini greenhouse or the like, you are better off using nature to raise CO2 levels. I have a 25' greenhouse that I put compost piles in during the winter. Put of plenty of...
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So I've been researching this topic for the past hour and id like to know /diy/ opinion on this. I believe I will do this with this http://pcpartpicker.com/p/mgC2P6
30 replies and 4 images submitted. Click here to view.
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>>907079
Fun gimick for hardware reviewers. Not really practical for people.

You still need a radiator. The performance gain the reviewers see is from the huge sink it is. Once its at capacity its not much better than water cooling.

You're also not running up against any sort of performance wall with air cooled boards any more. This might have a use if you need to get one more .1v out of your cpucore to get another 200mhz. Realistically that's not a worthwhile gain and you could probably get it by just...
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>>907081
I'm doing it for looks over practicality. I don't plan on upgrading but when I must I will just build a new pc :)
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>>907093
I did it. It was cool. Had a small fish tank with a rounded front sitting around. The oil was very expensive, though. Wouldn't do it again, although it cooled the components fairly well. It's too risky with kids, and I can't fathom submerging expensive parts in it.

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Hi guys. I'm wondering how to make a display where 3 or 4 leds slowly fade in and out. I'd like a blue, white green and red one and I'll have them behind some acrylic to wash the light a bit. What I'm wondering is, if its not possible to do this with single components. What about a arduino type thing ? I don't really want to learn or buy an arduino. So I was wondering is there some little chip one can programme and put on a breadboard that could achieve this task ??
Many thanks..
14 replies and 3 images submitted. Click here to view.
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Arduino is complete overkill for a project like this so you're right to look for something else. Any low end microcontroller like something from the PIC12F or an Atiny families more than enough. You can implement PWM LED fading in software on any digital output, it doesn't have to be an "analog" (PWM) output.

> inb4 somebody tries to start a PIC, AVR, ARM debate.

One of the reason the Arduino is popular is because it can be programmed just by plugging the USB cable into your computer. Most dev boards come with bootloaders...
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>>912134
>> inb4 somebody tries to start a PIC, AVR, ARM debate.
You already did. Since the OP is obviously a complete newbie, an Arduino is a perfect solution.
>>
There's nothing really wrong with Arduino, while it's certainly overkill for the application, it's still a good learning tool as long as you realize that Arduino should just be a stepping stone towards pure AVR or other platforms. Nothing wrong with either of them.
The thing you quickly need to realize is that 'Arduino' is really just the ATMega mounted on top of a vastly overpriced board, if you go the Arduino route, first up buy a Chinese one, such as Funduino, it's much, much cheaper than straight Arduino and works just as well. The let's...
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File: sodium_persulfate_solution.png (1 MB, 1920x1080) Image search: [iqdb] [SauceNao] [Google]
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Hi diy. I want to buy a few hundred grammes of sodium persulfate but I can only source it in 50kg sacks. location republic of ireland. halp!
11 replies and 2 images submitted. Click here to view.
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You can't just go to your local electronics shop and pick up ferric chloride?
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>>912056
I guess I could come by it easier but I attended a class where the instructor used this stuff and it was much cleaner and easier to handle. He recommended it over ferric chloride.
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never mind I found some. strange I couldn't come across it before now.>>912056
thanks for the suggestion.

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I'm looking to get a kickass turntable this Christmas, which makes this piece of junk obsolete. So, I'm going to completely dismantle it and rebuild it. I'm going to 86 the speakers and make it so I just plug it in via aux. I know the whole player is shitty, i just want to make something interesting looking.
Has it been done before? Can I see some builds?
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File: essential_6.jpg (83 KB, 1000x747) Image search: [iqdb] [SauceNao] [Google]
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I'm getting this one, so I think I'd like to aim for a minimalist look.
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>>911071
1) look for a belt driven. If the belt isn't showing, then don't get it

2) look for a thick heavy plate. I mean 1 inch thick at least

3) look for conical shaped under legs

4) you must get an external mono amplifier. Decent ones let you choose the voltage and resistors, according to your turntable cartridge

5) expend some money on a cork mat, for the turntable plate

6) learn how to propetly ground your turntable, otherwise you will listen to hiss sound

7) learn the basics on how to handle your records: https://www.youtube.com/watch?v=L2QfjcgDjsY

8) learn where to get quality records

9) get some high end amplifier

10) get some decent speakrs or headphones

that >>911071 record player sucks, to the trash it goes

this one >>911072 looks decent, but it lacks the thick plate, so I would give it a 5/10

if you hate the inconvenience of doing all this shit, then don't get a record player, get an spotify account and some nice headphones
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>>911071
>I know the whole player is shitty, i just want to make something interesting looking.
Interesting idea, but I'm not sure if I'd even bother to go that far with it. Even with the guts ripped out, these made in China Crosleys are only good for firewood.

Just my opinion, but try checking out a nice turntable from the 70's era. Some of the best built equipment comes from the 70's, early 80's. Not sure who makes a really decent turntable these days. Some research will definitely pay off.

>>911087
>1) look for a belt driven. If the belt isn't showing, then don't get it
Nothing wrong with direct drive, though.
And a reasonably good belt driven model doesn't necessarily have to have an external belt.

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