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I have a little 50cc 2 stroke pocket bike engine I bought for a few bucks. I want to make it run on 91% isopropyl alcohol because otherwise its just taking up space for no reason so I might as well make a project out of it. How do I figure out the stoichiometric ratio of isopropyl alcohol and how do I use that to calculate what size jet I need in the carb? I'm not concerned about rubber damage as if I comes to it I can just get or make some alcohol resistant seals.
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You look it up
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>>1090132
how to you plan on lubricating the engine?
2 strokes mix lubricating oil with the gasoline
damaging gaskets are the least of your worries when the motor seizes
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>>1090133
To add to that good luck with your floats
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Is making something like pic related starting from no knowledge (but I will be borrowing my dad's tools) a good idea? Should I start with easier projects first and just buy some cheap Ikea drawer for now? I am in desperate need of more storage right now for my clothes + everything else. I don't exactly want a bedroom wardrobe but something like it, just more general purpose.
My first problem is, what terms do I even google for? Googling for cabinets give me mostly kitchen cabinets, something with entirely drawers might not be flexible enough for me either since I have books too. A wardrobe isn't what I'm looking for either since I want something more general-purpose.
Maybe something like a bookshelf but with covers (ideally dustproof if that is even possible) instead, but what the heck do you even call that?
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>>1090113
It's always a good idea to try to make what you get an impulse to do. Just learn basic safety rules for the various spinning and cutting tools and go ahead.
Tips:
>1 Measure twice, cut once.
>2 Draw a schematic based on available materials, but feel free to sketch first to see what materials might be good
>3 Assume you will make mistakes, then try to plan to avoid them
>4 Don't expect results like pic related. That's made from carefully selected wood with few knots and matching grain by a professional.
>5 Don't be afraid to fuck up, just keep going at it.
>6 It will take much longer than you expect.
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>>1090113
what do you have for tools?
granted it could all be done with a drill (just for pre drilling holes so screw don't split) and jig saw as long as you have a good straight edge and a few clamps and a screw driver.
don't rely on glue, wood shrinks and contracts with changes in humidity. forget about dovetail joints just starting out.
if it has drawers and you don't plan on using hardware, use wax to lubricate the wood on wood sliding surfaces
what i picture in my head of what you described is like a china cabinet, but maybe not with glass on the doors
stay away from the particle board vinyl veneered crap, its fine once you assemble it, but you end up junking it if you ever have to move it.
if your using a table saw, use push sticks, you can't regrow fingers.
>>1090115
this guy is right, don't be afraid.
everyone starts off with no experience, go for it and learn, even through trial and error.
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>>1090113
Start with a few smaller projects. That way, if you screw up a cut you don't mess up a large expensive piece of wood. When you get comfortable with power tools, go for it.
Also, learning power saws is easier and safer with smaller pieces of wood. As long as you remember to always use push sticks.
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What is the cheapest 3d online printing site.
Trying to make my prototype
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3D hubs, although it varies depending on the production method you want to use. They're still going to charge you 5x material costs minimum, possibly as much as 10x for small items once you factor in P&P.
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>>1090010
Would any of you guys consider shapeways cheap?
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>>1090116
Hell no.
They do nice things, and I'm sure the cost of the equipment justifies most of that price, but it's still expensive as hell.
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Hey guys, i need someone experienced with wireless transmission to give me a hand here.
I'm trying to build POV display id you don't know what that is watch this: https://www.youtube.com/watch?v=CVOgsUOslMs&t=1s
And the problem i have is with how to power the rotating part. I was thinking about wireless power transmission but can't find a guide how to send power up to 9V - on lower voltages all you need is coil and transistor.
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>>1090002
Just do what they do for tank turrets. Make a slip ring.
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Why not brushes? That's how DC motors get power to the spinning electromagnets.
I've done some wireless power stuff. It's a transformer with air between the coils instead of ferrite. You need AC on the primary coil and bridge rectifier, decoupling, and maybe regulator on the secondary coil to get DC. The regular transformer rules apply, you just lose a lot of current from the poor efficiency caused by no ferrite core. Vp/Vs = Np/Ns = Is/Ip . Get more voltage out by putting more voltage in or changing the difference in number of turns between primary and secondary coils.
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im going to be taking an electrical techniques course in canada this january what equipment will i need if any? also what books and general advice would you say give me a little help?
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>>1089967
>electrical techniques course in canada
what the fuck is electrical techniques
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>>1089971
it's supposed to teach me these things
Application of the Canadian Electrical Code
Electrical Theory
Electrical Trade Safety
Math fundamentals
Commercial and residential building prints and standards
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>>1089974
Sounds like it might be a books only course. There are electrical stores in Canada if you need something and if you're coming from the US you can buy $135 of stuff for $100.
Anonymous
Fix a broken guitar by myself 2016-11-26 18:05:54 Post No.1089957
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Fix a broken guitar by myself 2016-11-26 18:05:54 Post No.1089957
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Fix a broken guitar by myself
Anonymous
2016-11-26 18:05:54
Post No. 1089957
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Hello /diy/, this is my first time posting on this board, I hope I'm not breaking any rules.
Some time ago I used to strum my father's guitar every so often. It wasn't a particularly fine guitar, it was the very cheap kind one buys to start learning how to play, but since it was a gift his late father made him when he was young, he somewhat cared about it. Anyways, a day I foolishly placed the guitar standing on a wall, and right when I turned away, it fell on the ground and the result is what you can see in the picture.
The head separated completely from the fingerboard, although it didn't snap the way I would have expected (a coarse, splintery mess). Instead, at first glance it seems that it came apart in a quite clean way, so I'm hoping I could manage to fix it by simply applying the proper glue and the right amount of pressure (and obviously sanding it and plastering it before).
I'm not sure if I want to hand it to a luthier, because the guitar is pretty battered in other points and I'm afraid he would insist on revamping it totally (e.g. by stripping it and then painting it with some fancy coating) or substituting the whole fretboard, both of which would surely make me spend a lot more than the original guitar's value. Anyways, since I want to give it to my father for Christmas, I could afford spending a bit on it (still not too much, 50€ is my maximum budget, poorfag here).
tl;dr/recap: do you think it's feasible to fix this guitar by myself? Will it snap back in two pieces once I tighten the strings? Note that my main concern for now is to make it usable again, I don't really care at this moment if it's not gonna be a spotless job.
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More pictures of the broken guitar.
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>>1089957
Glue and biscuits after scraping it smooth would be my preference. You could also spline it together.
Unless you have significant experience with joinery you're more likely to do more harm than good.
Take it to a proffesional and have them give you a quote. Sure they'll try and upsell you, thats how they make money. Just tell him
>"no thanks, just repair the neck. I only really have it for the sentimental value, not for playing."
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>>1089959
For the record, that was just a glued butt-joint there.
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Hey /diy, I often comment but rarely post. Today I have bought a CD player SL PG460A (Technics) from a used item shop for 20 bucks. Seems to work well in the store but when I plug it on my amplifier there was a problem. The seller is a douchebag who won't take it back. Too bad I have to repair it myself.
So, when I put a CD inside the player the optical pickup glitch randomly later in the song and it is very annoying. I was wondering if you could have any ideas.
I 'm an electronic student so I thought I could go in it by myself but... It's not too easy because I don't know where to start.
On vid you can see the optical pickup doing shit
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My webm is also doing shit. Anyway here is a schematic of the beast
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force the diode down to the start.
Your problem is not electronic the little diode cartridge just fell out of the carrier screw .
Also 20$ for a CD player. Son you some sort of retard? Nets thing you tell me is you got a brand new pet rock with a pedigree for just 100$. You got ripped off.
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Don't know where else to ask this but, I found this old sewing machine. Can anyone identify it? Maybe it's worth some money? Brand is Sear Kenmore.
Date written on the table seems to say 1967. I'm assuming that's when it was built.
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*Sears
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>>1089796
Kenmore is Sear's brand, like Merona clothing for target. They make washing machines now mostly.
Not really worth a whole lot, it's one of a million classic sewing machines, radios, typewriters etc you find in every antique shop.
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>>1089796
It will be made by Singer or one of the other major sewing machine mfg. That's what Sears did, put there name on other folks shit. A little Google-fu will tell you who. I have quite a few old restored wood working machines that were Sears from the '20s, '30s and '40s they are all good quality and made by respected names like Emerson, Rockwell etc.
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Hi fellow /diy/ers, me and my father are going to build our first cnc. We want a working area of 130x100cm (rougly 3x4 feet). I want a fixed gantry design, while my father wants a moving gantry. And here comes the problem, we live in the third world (argentina), and cnc supplies are not cheap. We can get SBR20 rails for a good price, but SBR25 are more than double the price, which is a no-go. We can also get hiwin-like 15mm rails for about the same price (a little more, but not much). With hiwin-like rails we need a very flat surface, that means aluminum extrusion which is super expensive here (we don't even consider that route), or a machined surface. We have a mill and a shaper, both of which only machine a 50cm lenght, and sending our pieces out to machine would be too expensive here. So, we need to go with SBR20 rails, which don't need that flat of a surface (I belive that with hand selected structural steed, properly squared, aligned and mayble shimmed, it's doable).
We want to cut mostly wood, with the occasional aluminum (I don't care if it takes an entire day to mill some aluminum, but I want to be able to). What do you think? Is it doable with structural steel and SBR20 rails? Moving or fixed gantry?
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>>1089668
Posting 2 of my favorites. Not your size though.
Openbuilds.org is CNC heaven.
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This one is my personal favorite. Very sleek.
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>>1089668
You can just buy the rails from aliexpress, and just about everything else as well. For that size I'd suggest moving gantry since you'd have a big-ass table to move.
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Alright /diy/, redpill me on glowbars.
>Do they go off after the oven ignites? (So is it safe to have them on for long periods of time?)
>Are they supposed to run on normal 120V or does the oven do something different?
>What is the ignition temperature of propane? (The temperature they heat up to)
I am trying to use one to sterilize compost.
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>>1089552
>Do they go off after the oven ignites?
Yes
>it it safe for long periods of time?
No
>Are they supposed to run on normal 120V
Yes
>What is the ignition temperature of propane?
455C 851F
>(The temperature they heat up to)
Not a clue but they get rilly hot.
Oh.. and never ever touch them with your bare hands. The oil in your skin will screw them up and make them burn out faster.
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>>1089552
Also.
Look up halogen lamps, they get hot enough to sterilize and can run all the time.
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>>1089616
So it will probably burn out prematurely if it's on for long periods of time?
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is it possible?
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>>1089466
you can 3d print it, vacuum form it, cnc carve it out of wood or steel, cast it with silicone, etc
so yes possible
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>>1089466
Sure is anon. I used ez-floor 60 2 part plastic and ice trays from the perv shop to make plastic Dickson for green sand casting.
Then I used it to make a high heat silicone to mold lead.
Melted the silicone and was expensive but it was identical flawless to the original mold.
Just get pic related and YouTube some turorials.
Mix it twice as much as u think u need and mix it more.
Still fucking have some liquefied...
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>>1089703
Grr...
Amazon 2 part silicone.
https://www.amazon.com/gp/aw/d/B004BNF3TK/ref=mp_s_a_1_1?ie=UTF8&qid=1480133166&sr=8-1&pi=SX200_QL40&keywords=2+part+silicone&dpPl=1&dpID=51cFiA-qZzL&ref=plSrch
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I'm thinking about learning how to work with gears, like a watchmaker, as a small hobby.
Is there a book on this?
And do I just buy a sheet of metal and cut out my own gears, like the old days, or is there a place to buy assorted gears?
I've tried looking it up, but my Google skillz are weak.
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What you have said is like saying "I want to work with bolts, like a mechanic, as a small hobby". Ambiguous as fuck.
Do you want to learn to cut gears? Or be a watchmaker? DO you have an application in mind or are you just going to make like monkeys at keyboards and cut random gears till you expire?
DETAILS anon.
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>>1089326
>Or be a watchmaker
This.
Really, I want to make small wind-up toys, but I might want to make watch some time, too.
And I don't want to actually apprentice as a watchmaker first.
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What do you wish to achieve? Clockwork mechanisms, steam punk stuff? Kind of need to point us in the right direction anon and the we can help
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What happened to the last blacksmithing general?
Can someone explain the sudden surge of stubby, tanto knives? Pic semi related.
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>>1089236
Less than 2 inch blade. Check your local laws for the implications
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>>1089236
Guess they'd make an ok box cutter, not a lot of use for much else.
Currently doing a run of little paring knives but they're about 90mm/3.5" blades, swear the smaller I make things the longer it takes sometimes
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>>1089275
short knives are good for leatherworking and woodworking
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Hi /diy/, pointed this way by /g/.
I'm a freelance videographer working out of the Middle East and parts of Africa. I'm tired of doing extensive editing on my laptop and am looking to build a portable editting station that I can leave back at the hotel. As I'm flying a lot I decided to place this inside a Pelican case. I have a Mac Mini, three multiple terabyte hard drives, a 60% mechanical keyboard and a mouse that need to be tucked away in addition to the 21 inch screen that I plan on fitting to the lid of the case.
What do I need to be conscious of when constructing this? How can I add an AC plug to the outside of the case without compromising its weather proof/drop proof design? If its only running while open, will heat be a problem? What's the best way to start cutting/drilling into this beast? Any help appreciated.
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If you weren't such a mac fag got you could buy a tough book and stop trying to cobble together one. Also, don't put a cord through the amazing pelican case. It's very well engineered and we don't want a sand bigger like you fucking it up.
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>>1089255
I'm an American working overseas. I'm putting this together as I'm tired of being limited to a laptop screen as it's not the most conducive screen size for editing.
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>>1089260
Why not just use an external screen then and tuck that into the case? As I understood it you want to build a complete PC in it?
Or is computing power a concern?
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Newest deco
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Hi, Frank
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>>1089072
Hi Frank, welcome to /diy/ you faggot
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>>1089072
Ahahaa! So doing this. Frank needs arms and gloves