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Archived threads in /diy/ - Do It yourself - 25. page
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Creating a super radio capable of sending and receiving signals from long distances. Very long distances. Possible? Teach me, diy.
Pic unrelated.
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short wave
>>
Short save? Please elaborate?
>>
wtf do you want it for

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Anyone use software and a mic to tune their piano? i've got a tuning hammer, and i'm gonna borrow a friends laptop so i can try and use the "Entropy Piano Tuner" http://piano-tuner.org/ that creates a stretched inharmonicity tuning for you after recording all your keys. i guess the idea is that by randomizing the variation between keys, you create a piano that doesn't go out of tune as fast, as the tunings drift, they're not as distinguishable or something.

anyways, what have your results been with this?
8 replies and 2 images submitted. Click here to view.
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I've used tunelab but that cost quite a bit of money.
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>>1073595
Why not just get a fake piano? It feels pretty much the same and it sounds decent enough.
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>>1073777
Why not get a harbor freight impact drill. It feels pretty much the same as a dewalt and it works decent enough

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I'm looking for a cabinet to store my shit in and I don't have the expertise or tools to make a really nice one for inside the house and not just some makeshift one in the shed or backyard (I want something simple and rustic).

How do you figure out whether the prices you see on kijiji or craigslist is fair when there's no retail equivalent to compare to?

Pic related is CAD$385 for example
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>>1073593
When did /diy/ mean shopping network?
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>>1073593
Buy a nice used wood dresser at an estate sale or something. I have two. I paid $40 for one and $55 for the other. They are both 5 drawer highboys, similar to your picture, but 'waterfall' style. They are wood with veneers, so loads better than the new particle board and paper shit you see most places. You gotta shop around for the deal, man.

>CAD$385
I forget the Loonie to McDollars ratio but that is more than I would pay. The only reason that is selling for so much...
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I store my shit in a toilet. And unless you are from india you should too.

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Hello DIYnosaurs i need some advice on this transformer i salvaged.
how do i wire it up without frying anything?
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>>1073441
here are the connection terminals
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>>1073442
>>1073441
>>
>>1073441
nice find.
use an ohmmeter and find the coil that doesnt change when turning it, that would be the primary.

the output would be the others i assume.

keep in mind that autotransformers are not isolating like normal transformers, therefore one phase of the output is common with one of the inputs.

I have a bedbug infestation, and I need something cheap and guaranteed to work. These sashays keep me awake at night and stain my bedsheets and blankets with blood-shit.

Anything that's good for spraying on walls/beds/carpets/etc. and won't harm me or my family.
24 replies and 3 images submitted. Click here to view.
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>>1073280
>cheap
>guaranteed to work
>won't harm me or my family

This attitude tends to lead to prolonged suffering. Take it seriously.
And if you're renting, it's the landlord's problem, at least in some places.
>>
>>1073280
diatomaceous earth in a squeeze bottle, mist and cover the edge and corners of the bed and all the nooks and crannies nearby

it will be dusty as fuck and everything should look white but the more coverage the better

also inspect the bed and bedsheets every day, look into the little folded areas along the elastic edges that is where they usually nest in, then nuke the area with the earth
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>>1073285
Literally looked up "diatomaceous earth" and in 5 sec I learned that it's the fucking bane of all small insects. I'm going fucking Crusades on these bastards.

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Hello,
recently i bought an electrical oven, it warms up nicely, however there's a huge issue with it-
the oven is incredibly loud, it's almost as loud as a washing machine. Up to this day i've always had gas ovens. Is this normal for electrical ovens to be this loud ? (it begins to be loud 20-30 seconds after I start it to work). If it is not normal, what can be damaged inside ?
Best regards,
Dynio
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install gentoo
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>>1073263
Did you buy it new or used? Does it have a convection fan? Bearings in the fan could be going bad. Just guesses.
>>
and what is that ? a Microwave? How am I supposed to bake anything in a microwave?

Maybe just a home-mad satellite that I can send signals in the air. The title is a joke, but I still want to send signals with it. I have: One foot of thin copper wire from head-phones, two old intact phones I don't need anymore, one TV that can't produce light so I don't need it anymore, a pile of hangers, a pile of forks, and sheets of aluminum. Any help?
28 replies and 3 images submitted. Click here to view.
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You need to read about the fcc laws about broadcasting. They limit frequency and power for hobby broadcasting.

Your best bet is a HAM radio which you need a license to operate. It's a niche group of diyers that get into it but they're OK folks.
>>
>>1073177
What are you wanting to transmit? Hopefully nothing that would end with you getting assfucked with a huge dildo by the FCC right?
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>>1073177
I haven't seen E.T. since I was a kid but I vaguely remember a record player and a circular saw blade being involved. Do you have a record player and a saw blade?

Hi, Does anyone have any DIY pictures, ect regarding suvival/Nuclear war survival/ Surviving aftermath ect? Anything you might deem relevant/Nescessary is greatly appreciated! thanks in advance.
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>>1073161
Bump for the love of god
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>>1073166
Is there something you aren't telling us anon?
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>>1073169
Yes. This isn't /pol/

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This thing broke off the dishwasher with minor jostling. Is there any way it can be replaced without replacing the whole thing?
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God, the quality on this phone is garbage. The "thing" I'm talking about is that greyish greenish thing at the top-middle of the image.
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>>1073134
It's not even sort of important. Just put the soap in and close the door real fast. Problem solved.
>>
If you use soap packets you can just put them in the bottom of the dishwasher before you start it. I have done this for years since the little hinge/door thing on mine broke. It's not worth repairing, all it does is open immediately when you close the dishwasher.

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blower motor is good, resistor must be at fault, when I turn on the car it starts to spins, the blower, then stops, anyone know how to repair these resistors?
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>>
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>>1073096
...do you know what a resistor is?

it's probably that fat TO247 package BJT thats fried

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I need to know about circular saws. I need to cut some metal with very straight lines. I have my fathers old circular saw which specifically says not to cut metal or use abrasive blades. I see plenty of circular saws on Amazon(picture related, thinking about buying this) but they dont say if they are approved for metal cutting. There are some that say they are metal cutting but they want 400 dollars for that shit.

Whats going on here?
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>>1072924
liability and or warranty
Your dads old saw is probably better than the one you are looking at.

The "metal cutting" saws have heavy duty, high torque lower RPM motors better suited for cutting metal, and they have fully enclosed stronger safety guards.
>>
>>1072924
this >>1072930
for metal cuting you need specific metal cuting saw they designed for metal cuting like mentioned safety and motor if you are poor to buy you can rent one
>>
What type of metal are you cutting and how thick is it?

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I do not have much money, around 15 dollars to play with. I am just getting into boxing, and I cannot afford a punching bag, any ideas? Pic unrelated, its my dog.
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>>1072727
Well, there you go, just buy enough super glue to keep your punching bag in place.
>>
Go to a military surplus store, buy a used seabag, fill with old clothes, towels, sheets, get some rope, hang the bag from a beam, put on an old pair of work gloves, start punching
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>>1072732
This is pretty much how I started out, you could also look at CL and see if there are any cheap there, if you are attending a gym and they have a notice board then try putting a notice up asking if anyone has a cheap one for sale.

You could also try asking on /fit/ although I don't know much about that board or how helpful they are in general, and just in case anyone here has a cheap/free bag you might like to list where you live, you town and country.

Good luck anon.

Guten Tag /diy/

So I'm getting together the materials to do some backyard metal melting and molds.

I've got access to a lot of metals and wish to turn them into ingots, mostly for the space

Now the problem is not the different furnace designs...I've already chosen a design to make.

The problem is the walls of the inner furnace. I can't find a single furnace wall mixture that everyone can agree on. Everyone has got their own recipes but which do I choose? which one can help me forge the ring of power in the bowels of Mt. Doom?

p.s....
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The metals I intend to melt down are
- Aluminum
- Copper
- Brass
- Silver

Don't need to go hotter than that if that helps
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>>1072514
I have the kit from Foundry101.com, and don't regret it. The walls are a ceramic insulation fixed to a wire mesh frame. The top is steel over ceramic insulation. The bottom is refractory, with a steel pipe tuyeer. The burner runs on Propane and is easy to start.

It's expensive, but I enjoy this far more than the charcoal one I made previously out of furnace cement and perlite.
>>
How much do you want to spend?

At the lowest cost end, its hard to go past a DIY mix of perlite and waterglass (sodium silicate), as that will last quite a few dozen burns - typically you'll end up damaging it through klutzness before it gets too heat damaged and you can buy enough material for several furnaces for around $50.

Perlite from the nearest hydroponics (or even garden) store, and waterglass either purchased or home made from that crystal kitty litter and caustic soda (see youtube for videos on making it).

That'll happily withstand...
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So my neighbor wants me to landscape his yard and is paying me a few thousand dollars for materials and labor...but I'm not a contractor and I don't have a license. In the state of California any project that cost more than $500 requires a contractor's license.

Do I risk the potential legal hassle to make a quick buck or what?
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are you white? if so just bring a Mexican friend with you
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>>1072165
to give the illusion that I'm a contractor or what?
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>>1072162
get him to pay you 499.99 dollars and a blow job from his daughter

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Sup, faggots. Poorfag here who decided to buy cheap furniture from that one cheap Polish home decor company and ended up breaking it in the first week. How do I go about fixing cheap Belgian furniture wood?

Pic related: First pic is of right side where the piece broke off.
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>>1072032
Remove the staples. Replace wood. Glue and clamp.
>>
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Second pic: left side of Point Break... starring Keanu Reeves, Patrick Swayze and Demi Moore.
>>
Yeah it looks like you just need to whack that block back in and replace the strut. Use wood glue if you're feeling ambitious.

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Are there any games that can make you better at understanding mechanics, electrics, or other DIY stuff?

Like, physics games for fundamental building principles, or quizzes about materials and plants.
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Something I've found related to this are all of these informative slideshows:

http://electronics.wisc-online.com/

It has a ton of quiz questions, but I'm also looking for something a bit more interactive.
>>
>>1071550
no
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>>1071550
that is a fire / CO hazard

even if it does not ignite the blanket could smoulder in you sleep because if it's fire retardant treatment and kill you with carbon monoxide

Please contact the photographer and tell them that they are in danger

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last thread: >>1061668

tp://pastebin.com/9UgLjyND

>I'm new to electronics, where do I get started?
There are several good books and YouTube channels that are commonly recommended for beginners and those wanting to learn more, many with advanced techniques. The best way to get involved in electronics is just to make stuff. Don't be afraid to get your hands dirty.

>What books are there?

Beginner:
Getting Started in Electronics Forrest Mims III
Make: Electronics Charles Platt
How to Diagnose and Fix Everything Electronic Michael Jay Greier

Intermediate:
All New Electronics Self-Teaching Guide: Kybett, Boysen
Practical Electronics for Inventors: Paul Scherz and Simon Monk

Advanced:
The Art of Electronics by Paul Horowitz

>What YouTube channels are there?
https://www.youtube.com/user/mjlorton
https://www.youtube.com/user/paceworldwide
https://www.youtube.com/user/eevblog
https://www.youtube.com/user/EcProjects
https://www.youtube.com/user/greatscottlab
https://www.youtube.com/user/mikeselectricstuff
https://www.youtube.com/user/AfroTechMods
https://www.youtube.com/user/Photonvids
https://www.youtube.com/user/sdgelectronics
https://www.youtube.com/user/TheSignalPathBlog

>What websites feature electronics projects or ideas?
http://adafruit.com
http://instructables.com/tag/type-id/category-technology/
http://makezine.com/category/electronics/

>Where do I get components and lab equipment from?
digikey.com
jameco.com
sparkfun.com
ramseyelectronics.com
allelectronics.com
futurlec.com
ladyada.net/library/procure/hobbyist.html
mouser.com
alliedelec.com
newark.com
ebay.com

>What circuit sim software do you use?
This mostly comes down to personal preference. These are the most common ones though:
NI Multisim
LTSpice
CircuitLab
iCircuit for Macs

>What software should I use to layout circuits?
Circuit Wizard
ExpressPCB
EAGLE
KiCad
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So I recently came across a genuine hakko 936 soldering set when I was helping clean out a lab. The controller is busted which is probably why it was hiding in a box in the closet and not being used. The iron is still good and I'm thinking of making something like pic related which is a mobile soldering station, runs off any voltage like from a car or lab power supply and even RC batteries.

When I look up 907 controller on eBay I'm given dozens of variations, does anyone have any experience with these things or recommendations? Or even any info on diy versions...
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would this all be possible with a single arduino? i know very little about them and never used one but im willing to learn how to wire and program it. basically this stemmed from wanting to electronically control the throttle of my diy generator engine (yeah im that guy from before) to keep it in the efficient rpm range when the electrical load starts to slow the engine down. i thought that since im already going through the trouble with the throttle and im going to have the other sensors anyway i might as well hook them all up to a controller and have them output to a screen...
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Absolute noob here. I made a small circuit on a breadboard by following a tutorial, but they didn't cover how to go from being on a breadboard to being soldered together. The board's grouped by rows, so do I just solder everything that's in the same row together? So for example, all the negative terminals are on row 16, so I'd wrap all those together and solder them, right?

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Questions that don't deserve their own thread: the thread
Time to ask your question, look hours later and find nobody answered it!
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would one of these make an ok fuel tank for a generator? i installed a fuel pump on it so that i can use a larger tank than the small gravity feed one it comes with and i can get as my of these as i want from work for free. is there any way i should modify it for safety?
>>
>>1067635
>would one of these make an ok fuel tank for a generator?
How many liters it can hold? On this photo, it looks like a beverage can.
>>
>>1067639
looks like a 5 gal UN rated jerrycan.

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came into some moolah recently. tell me about your projects and ideas (so i can cop them) and i'll tell you how a crazy man can pull off a miracle.
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>>1065967
electroacoustics are bestacoustics
>>
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>>1065969
thanks for getting it started anon.

my story starts in early march of this year. frustrated from years of just cruising through life, i was looking for something to do that wasnt work, that i could learn a lot from and obsess over. a project with clear progress and a clear result. a project that would involve a lot of problem solving, a lot of time, and would be something i would be thoroughly proud of.

a project car was my natural solution. now, having no car at the time, i had to find something close...
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I just bought this infinity g20. Repairing some problems from high mileage before turning it into a dual purpose car similar to classic enduro motorcycles. Think a rally car meets a grocery getter

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I'm going to build a metal roller and I would like to take suggestions. The basic design is this, I'm considering adding another arm on the other side, but I like the idea of an open top roller. I wanna be able to roll 1"x1/4" flat bar, and 14 gauge sheet metal (on a 4" width). I belive that I can get away with not having another arm for my rolling requeriments, what do you think? I was going to simulate it on SolidWorks, but apparently you can't do it with assemblyes.
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you want to roll 1/4inch thick by 1inch wide flat bar? youre going to need a serious fucking piece of equipment to deliver that much force without breaking

you arent that same anon who thought he could make a new 4jaw chuck styled after the kurt vices are you?
>>
>>1065241
I think you could go with open design.
Myself, going open design, I would go full retard with 30mm top roller axle.
>>
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>>1065258
No I'm not that dude.
I'm taking the basic design from this comercial one, which takes 1 inch by 1/4 inch flat bar. Mine is more robust, the arm is half inch by 1 1/4, and the piece where it pivotes is more robust also. It's true that in my design I have 4 inch long rollers, but it shouldn't make a difference if I roll the 1/4" flat bar at the back. And with 14 gauge steel I belive I won't have that much deflection.

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So /g/ is full of people who hate fun. Anyone here do any PC case mods or custom cases? What have you done or wanted to do?

Pic related is my current PC.
Modifications I've made are:
Painted the inside red
Removing the molded plastic grill to make room for a better dust filter
I swapped out the HDD LED for a brighter one, changed one with a slow color changing one, and drilled holes for 2 new ones to make a sunset lighting.
Removed the front "grill" and cut out some plastic to help with the front fan from suffocating.

I'm currently...
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>>1058721
Here's the sunset. The case originally had blue LED's in the bottom of the front of the case where the orange ones are now.
>>
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>>1058721
And here's the mockup I made with GIMP.
The case is a mini-box M350. The stencil would be about 6"x6", though I've never done stencils and would appreciate any advice.
The plan is to do the base coat of gold or yellow, then black, then red or white
>>
>>1058731
http://content.photojojo.com/diy/inkjet-image-transfers/

Stencils or silk screening will both probably have good results though because it's such a simple design.

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What's a good way to get into woodworking with hand tools?

Anyone have a list of simple projects? A book perhaps?

Roy Underhill inspired me to give it a shot.
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Blogs and books by

Christopher schwarz
Unplugged woodworker
Renaissance woodworker

General hand skills and tool info

Books by Charles hayward,Paul sellers, to. Fidgen and I guess David Charlesworth to.
>>
>>1074634
Also interested, I like the appeal of just using hand tools, powertools remove the need for skill and all that
>>
Hand tool woodworking is a fad that will die out in a matter of months.

Invest in a quality table saw, jointer, and planer and the rest will sort itself out.

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First time working with wood/masonry.

I just built a pad for a wood burner out of some concrete board and some slate.

However I have just realized I do not have a whole lot of room to grout the slate.

Less than a 1/4 inch between the tiles.

Is there an effective way to grout this thing? Like a frosting bag or something?


>Inb4 "include me in the screenshot"
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>>1074550
just push them as tight as you can together
the joints will just be more places for ash to get stuck
>>
you could caulk it
>>
>>1074554
grout is needed per fire code

>>1074557
i'll look for some high temp colored silicon sealant. good idea. thanks.

Hello /diy/ first time poster once a week browser.

Designing a push button spring release design thingy!?

I'm trying to make pic related that is self contained, that only includes the two buttons and a spring and someway to connect them together so they stay parallel with each other.
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what?
>>
>>1074520
/cm/ that way
>>>/cm/
>>
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>>1074547
is this some sort of glory hole device?

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what should comments in code entail? i feel like a lot of it is silly when it's just x=2 \\x has been assigned 2 hurrrrrrrrrrrr pfftthppfthfphthflthlfhltp /n
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>>1074346
Don't explain what, explain why.
The general rule is if you have to explain what then your assignments are to complicated and you should split them up, but if you feel like going rogue then don't worry about it, leave them complicated fuck it.
But certainly you should explain why instead of what
Don't be afraid to comment on a block instead of line by line if it makes sense.

Basically when you write software usually you come up with an algorithm, point by point what you are going to do,...
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>>1074346
At the header and return of a function you should document exactly what variables it's getting, from where, and what it will do to them. The return specifically should re-state what it did to spit out this particular return, especially if there are different cases.

The problem with introductory programming commenting some of it really is too dumb to bother commenting, but teachers will still want it because it's so hard to find anyone that comments code properly later in their career.
>>
I've always liked these comments

https://en.wikipedia.org/wiki/Fast_inverse_square_root

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Hi!

Not sure if this is the best place to ask, but I'm looking for adding color lighting to my apartment, and I have no idea what kind of equipment to use.
I've been looking for a while but there's always at least one thing missing, the only viable solution is to go through companies to that install it for you, and that's way too expensive.

Here's exactly what I'm looking to do and what my constraints are:

> I want to add an alternative lighting system in my apartment that can be switched to any color
Can...
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>>
Remote controlled RGB LED lamps that go into the normal lamp socket, or RGB LED strips + control and power modules.

Neither would require any drilling/nailing as you can use adhesive tape for the strips.

Just google either or both.
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>>1074168
There was a pretty cool bulb I saw on Shark Tank. You replace all the bulbs in your house with it and download their app which controls the bulbs via bluetooth. You can do mood lighting, party lighting, synch it to music, have different settings for each room etc. It looked pretty cool.
>>
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Hmm maybe modify a "NZXT hue+"? They provide 2 channels and it's all controlled through software on your pc. The 2 channels are independent from each other.
If you could make so it can handle bigger strip lights and connect the strips to individual outlets then your set.
Curious as well.. I have a great led fetish

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Any way to use a thermoelectric generator to harness the heat off of rooftop solar panels to charge a deep cycle battery bank?
7 replies and 1 images submitted. Click here to view.
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>>1074111
TEGs are very inefficient at generating electricity from heat, and you'll need a significant temperature difference to get anything useful out of them. i red somewhere that even having a hot air engine with a dynamo is still more efficient than a TEG,
>>
>>1074122
This, maybe you could use the heat to heat water or something
>>
>>1074111
>>1074122
>>1074132
TEGs are fine when you have a lot of them together. They are a good solid state solution to waste heat electric generation. They are easy to install and have little maintenance. Their only draw backs are initial expense and low output per square foot.

Fluid-based PV panel cooling is also a good option, but requires a lot of space just for the heat exchangers in both removing the heat from the PV panels and placing it into whatever device you want to use to make electric with. This type of cooling is better used for heating potable water for domestic use in houses than for making electric in a van (if pic is related.) Faults and failures in the system become very messing and troublesome. In cold areas, you must have 2 fluid circuits if heating domestic-use water. One is antifreeze and the other is the domestic-use water. For non-domestic-water use you only need the antifreeze circuit. The best electrical generation would be to use the fluid system with a Stirling Engine of rather large diameter. Remember that all parts of the system except the heat exchangers must be well insulated and have active flower using a pump (the pump will eat up more electric efficiency). Thermosiphon flow can't be done efficiently when the heating is at the top of the circuit.

Costs for the fluid-based system will ultimately be higher than the TEG system for the amount of watts you will be able to attain. Costs also include maintenance and time spent designing, maintaining, and building a non-standard fluid system.

Using only air instead of fluid would be a waste of time and effort.

All cooling methods for PV panels will increase the efficiency of the panels and extend their life.

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How does a WiFi receiver work, and how can I build a bigger, more sensitive one?
8 replies and 2 images submitted. Click here to view.
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>>1074057
>Picture unrelated
>No useful info
>No tools
>No skills
>Wheres my DIY Bingo image when I need it

>How does a WiFi receiver work
Google it.

>how can I build a bigger, more sensitive one
The antenna is probably more important than the receiver for whatever it is you are doing. You...
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>>
Acquire PhD in RFIC design or equivalent
>>
>>1074057
Perhaps I should have specified antenna.

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So i had an internet cafe more than 10 computers, have since sold off most of my hardware but still have like 6 17" 768*1024 monitors, is there a cheaper way than using 2 triplehead2go adapters to run my 6 monitor video wall?

Gonna take the casing of and weld up a frame to hold my 6 monitors 2 high, 3 wide.

Using a gtx 960 4gb that can technically run 4 monitors, but my monitors are old vga and dvi a, don't want to have to deal with 20 adapters to use only one triplehead2go, just want a simple to setup solution.

So basically wondering if anyone...
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just stuff more graphics cards in, and use SoftTH
nvidia nvs280s were adequate as secondaries when i had a video wall
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>>1074008
Usb to vga adapters?
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>>1074100

that right there is fucking stupid. why thew hell use 6 smal monitors when you can buy a like 72" TV or video display and eliminate those fucking bezels that just would annoy the fuck out of me watching video on that

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Hey /diy/, newbie diy-er here. Does anyone have any knowledge on CONIA TVs?

I've had this one for a while, picked it up for cheap due to it making a buzzing noise whenever it's on. Never really had the time to get around to fixing it, and just used it anyway. Now I was wondering if there was a way I could fix this.

From what I've gathered it's a busted capacitor, but I'm more or less useless when it comes to this stuff so I'm wondering if anyone has an idea of where I should start. I know it's tied to the contrast/brightness...
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Left side (from the back)
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>>1074006
Right side
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>>1074007
>>1074006
Find the backlight control board
replace the caps one by one until the buzzing stops.

Alternatively sell that piece of shit on CL and buy a new one.


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