So I finally put my ass in gear and finished the cryptex I designed and started around this time last year. I haven't really posted on /diy/ before, but I have a sneaking suspicion that this flavor of content would be appreciated here.
Tools used: CNC router Bridgeport mill Lathe Propane torch and silver solder Heat treatment oven(because I had to anneal one of the damn tubes, knew a guy) Files Sandpaper Grinder Arbor press Metal stamp set Patience, lots
Materials used: 1.5" OD x 0.063" 4130 steel tube 1.375"... Comment too long. Click here to view the full text.
From looking up every cheap 3d printer, the reprap variants seem to be the best bang for your buck. Right now Im wondering if I should go cheap and get one I see for $175 or shell out $400. The latter would be a huge investment for me because Im a poor college student. >http://www.ebay.com/itm/2016-Upgraded-Quality-High-Precision-Reprap-Prusa-i3-DIY-3d-Printer-USA-OB-/272039768516?hash=item3f56d571c4:g:FwgAAOSwUEVYEKul >http://wanhaousa.com/products/duplicator-i3-steel-frame Secondly should I assume since... Comment too long. Click here to view the full text.
>>1087981 If you're a college student, look into your school's engineering/tech labs. I'd find it hard to believe they don't have at least a few 3D printers. They'll likely be significantly higher resolution than what you can get for $400, and (if your school is anything like mine) all you need to pay for is the cost of materials.
>>1088007 That's unfortunate. Have you checked if there's a makerspace type thing in town? Those cheaper 3D printers are a bitch to work with. The resolution is typically awful, the nozzles clog like nobodies business, and the hotbeds are unreliable at best.
What are you intending to do with it? If you want to make little sculptures to sand down and paint, the cheap ones will be okay. If you're trying to use it for rapid prototyping or production parts (please don't do this), then you'll really... Comment too long. Click here to view the full text.
I work at a party cleaning/fixup service, and there are always a metric fuck ton of helium balloons left over.
I was wondering if there is a way I can extract the helium from each balloon and put it back into a metal or glass container for long term storage, preferably a hand pump run system.
Picture is a pencil shaped stabber thing that you put in the balloon and connect some sort of hose or housing to the threaded side for the helium to go to, i came up with it but idk what you would attach it to.
It could work if it's really thin, like a needle so the ballon doesn't pop. When working on the air-conditioner of a car you have to first pump out the Freon, then you can add it all back. The Freon is stored in a metal container, kind of like an air compressor tank. You might look into rigging up a system like that.
>>1086004 If you put a small piece of sellotape on the surface of the inflated balloon, you can then pierce it without bursting it. If not, it doesn't really matter how small a needle you use, it's gonna pop.
>build air tight box >install a pump >install a way to pop the balloons (electric spark maybe?) Without opening the case >add balloons >pump out the dirty air >attach He tank >pop blooms >capture helium
Based on my middle school... Comment too long. Click here to view the full text.
I want to build an electric generator but have Nickie where to start. And any tutorial I look up yields a small generator. I want to be able to at least power 2 devices at once. And I'd like it to be human powered.
I want to build a switching circuit for diverting signal to and from guitar pedals as well I want to switch power on and off to the pedals at the same time.
Right now I am thinking of using an EDE2208 momentary to toggle ic and a couple of nlas44599's. I don't think that the nlas is capable of handling the necessary current through its switches though. Am I wrong? I am not very good at finding appropriate parts.
I'm interested in having an all tube guitar amp. I'm no electrician. Is it as simple as using a tube powered pre amp (Hughes & Kettiner Cream Machine or something like that) into one of these mini mp3 booster tube amps, then into a cab simulator? Any suggestions about which pre amp/amp/simulator would be appreciated.
Or any suggestions as to how to build one into a single unit. A tone stack would be a big plus as I would prefer that to running a pedal.
You clearly have no idea what you are doing. Not just electronic wise but guitar wise. I feel like you heard that tubes are cool and now thats why you want an all rube amp.
Yes you can make a tube amplifier and have it's impedance matched to a set of headphones. Why you would want to is beyond me. It would take two transformers, a power transformer for power, tubes take a lot of voltage, and a output transformer to match the output impedances. You could even get away with 2 tubes in each section. 2 push pull preamp tubes and 2 push pull amplifiers. Lets say you... Comment too long. Click here to view the full text.
I have come into possession of a very large calrod heater. I know it probably goes to a very large reach-in/industrial cooler or freezer, but does anyone have any idea what brand it might come from, or can point me in any direction? So I can list it on eBay. Small calrod defrost heaters for refrigerators run $40-$60, so I'm guessing this thing is worth a good deal of change. Apologies, I know this isn't really diy, but I figured was best board to post on. Thanks in advance.
hello guys. im new into antenna design. i want to make an lna or something. y take apart ageneric directv lnb and i found some mabe usefull components. like pic but y cant found the datasheet for this transistor can you please help mi to find it or one similar. >also RECYCLING TRHEAD
I'm currently in a relationship with the first girl that actually makes me happy and is like me in a long list of failures. But that part isn't important, what is important is that Christmas is coming up, and I wanted to get her an awesome unique gift. Neither of us have a ton of money but we share a big passion for space, and so I ordered a necklace with thing made out of meteorite (pic related).
Is it possible to engrave this material? With lasers I think it has to be homogeneous, but cnc or a dremel tool seems risky in the event of shattering.
What... Comment too long. Click here to view the full text.
Hey /diy/, been clearing out a house for a family friend recently and discovered this.
It's obviously a thermometer, but it's got small grey metal balls at the bottom of it, covered over with a red substance- looks like wax?
The scale is also strange- graduations of 10 degrees all the way from 170 at the bottom to 00 at the top, then right at the very top jumping (in the same length of a normal 10 degree graduation) to 990 and to 980?
I've never seen a thermometer like this and wondered whether you guys know what it is and what it's use... Comment too long. Click here to view the full text.
Why is pic related so expensive? I don't know much about EMG,but if it's essentially just measuring the potential difference between two (expensive) electrodes,what's the big deal? Also, this seems to be the only muscle sensor kit out on the market,why?
>>1090560 >Why is pic related so expensive >Also, this seems to be the only kit out on the market I have absolutely no idea what you are talking about but it seems like you have already answered your own question.
>>1090560 >(expensive) electrodes Because the primary market for those electrodes are the health care professionals. They're fine with electrodes costing more than $0.01. >the only muscle sensor kit out on the market,why? Because there's no enough interest? Because guys who want to build those things rather design their own shit?
Hello, i got a night vision camera that works on 3x cr123a's but since these batteries wont last long i want to use an external battery or powerbank, now any tips on doing that? so i'll probably need 9volts or am i wrong? *pic related
>>1090414 9v battery won't last any longer. MAh rating is what matters. Think of volts has octane and mAh as fuel tank size. You're running on a 5 gallon tank, you need a 30 gallon tank. You need 6x D-cells in series, since 123's are 3v and D-cells are 1.5 (nicad anyways, some rechargables are 1.2v) Better yet would be a 6x2 of D-cells.
hey, quick question. I have this situation: there is a mains water pipe, it is an old pipe, and I am planning to bury it under plaster board, etc. On it I see a small corrosion center and currently there is no possibility to change the pipe into plastic one. Being paranoid of a leak this is what I am thinking - to take a piece of fiberglass, use some polyester resin and wrap around the area that concerns me. The question is if a hole would develop in a pipe, would this fiberglass infused with epoxy hold up? The pipe might have a pressure of up to 5 bar (72 psi), it's... Comment too long. Click here to view the full text.
>>1090025 It is an apartment building, it is a real pain in the as to shut down water, etc. The main question is would this work? I have a suspicion it would be plenty strong. But maybe there are some secrets I don't know. I know this is a shitty solution.
Its time for a whole new cordless tool set. Who is gonna have to best Black friday deal? Bonus if the line includes a tire inflator (heading to baja this month and need to constantly air down tires for beach driving)
What are your experiences with this? Every professional I know has disability insurance, but how does it work when you have a job that is actually dangerous? I'm willing to bet that it is very expensive, if you can even get insured at all.
Hey /diy/ Poor fag in college here (Computer Engineering) and I always wanted to learn how to diy-related items and make stuff or even draw but I never really have creativity for it at all, I just spend my time playing video games or watching anime or some shit.
I wanted to know if there is any advice for a fellow about doing little diy projects or getting creativity to make something?
Also have some communist propaganda or something that's been sitting in my laptop for a few months.
>>1088312 This works for me: See something cool somewhere. "I'd like to have that, I'll make it! " Or feel the need for a tool or thing ie or whatever and feel the urge to do it. So motivation and possibly necessity dictates what I make. Now I'm building a house. Shit its lot of work...
>>1087522 Yeah you could reprogram it but good luck getting the software AND making the changes without being caught. They are called one armed bandits for a reason.
Back before they were all electronic you might have had a reasonable chance to win but now that they are all electronic you'll never get ahead. They will give you small wins just to keep you going then suddenly you just stop winning
I recently starten taking my rally car apart, and discovered that the previous owners have straightened and "welded" dents using duct tape and seam sealer. Working on cleaning everything now. Anyone have som nifty tricks for pulling out sheet metal in cramped spaces like the inside of wheel arches?
Pic sort of related. Couldn't get a good pic of mine as it is still mostly covered by sealer.
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