Archived threads in /diy/ - Do It yourself - 532. page

>>987039
Going to school and getting a job are typically the ways to acquire skills. You're relying on a bunch of know-nothing volunteers building budget houses to teach you shit? I'd become an apprentice before I do that.

>>987044
you could start by killing yourself if you are this poster

>>987044
They have actual contractors showing volunteers how to do tedious tasks

>>973546
Fedora smiting

>>973546
>>972956

Well I guess that is one of them.


>>973668
Forging is less autistic than some of the other shit on 4chan...

OPEEE you gotta start it off with something to talk about. Like anvils, favorite hammers/tools, charcoal vs coal. Blacksmiths hate him, 1 neat trick to make your anvils stop fucking ringing so loud you wish you could buy a suppressor for it

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There is a difference in the top ring on the piston. The new one has a receded top for the piston to fit into. The old one does not.

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Also, the old piston is scored to fuck. The walls of the cylinder have minor scoring(pic related). Does it need honing? Can I use this new piston?

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>>998313
Old piston

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another angle

>>998269
IKEA fitting thingy

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>>998269
>>998273
Have this helpful diagram

don't use your in-camera/phone flash, use a light-source at a 45° angle from the surface.
try and minimise light hitting your phone/hand and also whatever is behind you.

also polycarbonate is 3x the price of acrylic and for this purpose you wouldn't notice a difference.

>>998070
Use an iron. Put the paper on a flat surface, as flat as you can get it to stay. Put a towel over it, and iron the towel on low heat. Let it cool, and take the photo.

>>998075
Many receipts are made through xerography, i.e. with heat. Wont ironing them turn them black and thus ruin them?

Of quality? Lol. No.

Potentially a scrap yard

>>998012
Building sites at night.

Also, in the back of unlocked vans and tradesmans vehicles.

>>997806
Yes
/thread

>>997806
Sure. Unless your house catches on fire and you were depending on that smoke alarm to let you know. But that cord has a plug on the end, so you're all good there.

>>997807
>>997813
oh ok, i still have detectors in each room but that specific one kept giving me the "malfunction" code so i removed it. just wanted to make sure that cord thing wasn't hazardous

thanks guys :^ )

>>997633
>Are there ventilation devices that can be regulated via voltage or with a resistor?
You did not state how big of a device you wanted, or exactly how you wanted to control it. But anyway-

1. Most home-ventilation fans are synchronous motors, and varying the speed of them is rather complicated to do. The speed they turn at is dependent on the AC supply voltage frequency.

2. PC fans have brushless motors (which is good, as they last longer than brushed motors) but they have a driver circuit built-in so that they can run right off 12v DC. You can get PC fans from 25mm up to 200mm diameter or so, and motor controllers that will work with DC motors are cheap and simple to use.

3. To adjust the speed of a 12v dc fan, you need a "DC motor controller" that is rated for 12 volts and at least maybe 25%-50% more current that the fan is rated to draw. You can get small DC motor controller boards that have a knob to adjust by hand, or you can get them with "digital" wire hookups that you can operate by an arduino or whatever (5v) microprocessor you want.

4. If you want a fan that can be adjusted manually AND automatically by an arduino, then you run the fan by arduino (using a digital motor controller) and you also have controls hooked to the arduino to tell it what speed you want (there are very cheap + durable capacitive button boards available, with 4 buttons on them). There are motorized pots available but they are kinda expensive, prone to wear and may be difficult to replace in the future.

5. To run a 12v DC motor, you would also need a 12v DC power supply that can deliver at least 2-3 amps. These aren't expensive either. I prefer the ones that have their own metal enclosure over the ones that are a bare circuit board.

6. My own opinion,,,,,,, if you are building electronics projects that plug into a wall socket, it is VERY WISE to put a fuse on them and size it aggressively.

>>997650
Or you could get a four-wire fan, and control it with a voltage-driven PWM signal.

I see how this might have passed you by, given how it only became a standard in 2006 or so.

>>997650
I thank you most respectfully for your extensive answer, despite of the insufficient information provided in my initial post.

I'd work with a 12v DC Fan with about 10 cm diameter, because i'd like to use the same power supply to power LEDs, so in any case i have to get down from the 220V in the network.
Of course the LEDs have different needs that have to be treated in a separate circuit from the 12V power supply.

I will look further into motor controllers then.

>>997500
a 10$ one is fine. unless you intend to use it on mains voltage a lot. or you need some specific feature like transistor or capacitor testing. or ESD protection.

as a matter of safety, if you're using it on death voltages like you will find at mains voltage, you need standardized rated probes so it cant arc through cheap chinky plastic.

>>997500
If you already have a multimeter then why do you need a new one? There are better things to waste money on.
If your job/life depends on it then get a proper multimeter. 30$ won't cut the mustard.

Auto-range is a nice feature i would like to have.
Also frequency meter useful when working with PWM.

I'm playing a lot with AVR uC so having second multimeter is convenient

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Draino is ass
Get this shit

Have you snaked the nigger?

either you snaked it wrong or you didn't go far enough

>>997080
Torx

>>997080
You'll need a torx bit. also known as a star bit.

>>997088
>>997087
Thanks

What a bizzar tool. Why not just life simple and use standard Philip's?

>>993889
That one looks pretty good, use that.

>>993889
Computer engineer here, your project is completely pointless.
The whole point of cooling is to keep the chips in a certain temperature range and this can easily be achieved with air or water cooling.
There is no point in going below some temperature, so unless you live in an oven, a compressor is fairly pointless.

However if you insist on it, you're going to need:
>Microcontroller
just use an Arduino
>Temperature Sensor
Either a Thermistor + adc or a microchip, refer to https://en.m.wikipedia.org/wiki/List_of_temperature_sensors
>Motor controller
You may be able to scavenge one from the fridge. Be advised that a fridge will likely use a 230/110 Volt AC motor, so buy the correct part.

And that's it. Hook the motor controller and temperature sensor to the microcontroller and load a simple program that adjusts the power to the motor according to the temperature.

If you are content with just an on/off switch, you can do without a microcontroller altogether. Just ask if you have more questions.

>>993925
op here
people have gone to extents of cooling using liquid nitrogen so a compressor would definitely not be an overkill( I am going to use it duing overclocking).
plus i am repurposing a fridge compressor.
i think i might need knowledge of welding and coupling for the pipes, and some knowledge of thermodynamics and the physical properties of gasses.
My major concerns are what dangers and precautions should i be aware of.

>>990510
acetone peroxide

Baby powder

>>990510
Borax and icing sugar.

seconded

Pretty sure that thing is only good for aluminum. Which doesn't mean you shouldn't make it, but just don't expect it to be more versatile than turning cans into knick-knacks.

But it does seem like if you want to melt aluminum on a hobby scale, that's a pretty damned good way of doing it.

>>988916
I've built two now, it works pretty well for aluminum, I haven't tried anything else though. I think it's good for the amount of money spent building it.

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Rest in pieces of smashed lame circuitboards, fellow alcoholic :)

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>name
>value

every time man, every time

>>987082
"He installed "hassler" devices that emitted high-pitched sounds whenever someone talked too loud, and even blew up an annoyingpublic addressspeaker with firecrackers.[11]Jim Williamsrecalled an incident when, after tracing externalelectromagnetic interferenceto thecontrol towerof theSan Jose airport, Widlar telephoned the airport and demanded they shut down the transmitter"

What a fucking legend.