We should have a Back to School Challenge!

I think that this would be a great, fun, and relevant contest for the months of August and September.

Posted by jseely23 2 months ago

Would a small scale model of your own house fit in the theme the Tiny Home contest?

Question for mods. Sorry if this is the wrong spot.

Posted by DIYJRAY 2 months ago

Calibrate Compass

I have compass cmps-12 and i want to use it or calibrate it with my raspberry pi 3 using python. I already check on website but im not find it how to make it work. Please anyone knows how to calibrate compass cmps using python on raspi3 i need your help. :(

Posted by alharis 6 weeks ago

Construction of a robot learning to move in internal rooms

I am looking for a person who knows how to make a robot that will move inside the space, avoid obstacles and create maps of the rooms in which he works?

Posted by finder11 2 months ago

What to do with old vacuum tubes?

I recently found a really old tv in a crawlspace at work and I brought it home and salvaged 13 vacuum tubes out of it. I figured I could make some sort of cool project out of them like maybe a mad scientist lamp with LEDs or something. But before I actually start using them I wanted to brainstorm some more ideas of possible projects. So if anybody has any good ideas of cool things to do with vacuum tubes, let me know. Also, just out of a nerdy curiosity I was wondering what exactly vacuum tubes are designed to do, does anyone know?

Posted by cannedham160 9 years ago

Trying to create my own car head unit.. Sorta.

So i enjoy electronics, so i thought of an idea that would really benefit my life. I enjoy listening to music in the car. Like really enjoy it. Currently i have the original head unit that came with the ford focus mk1. Its terrible, and the speakers distort at loud volumes. Plus there is no way currently for me to listen to my own music apart from a CD. Which come on.. no one uses anymore.So here's my idea that im finding difficult to bring to light. I was hoping i could create some sort of botch head unit. But i want to create this using components that are not end products. So no i do not want a £100+ amp that does this for me without the DIY. It should be a lot cheaper to do this DIY.So my idea was 1 amplifier circuit board, which is difficult to find to power 4, 4 Ohm speakers. So my idea was to have 4 separate amplifiers for each speaker. I can't find a single channel amplifier to power a 4 Ohm speaker however. The signal the amplifiers would receive would be through an auxiliary cable or bluetooth reciever.Any ideas to point me in the right direction would be awesome. If there's a loophole in my idea then please let me know. Still a lot to learn, but that's what were here for right.Thanks in advance.

Posted by BrandonC211 7 weeks ago

Edf jet longboard how much thrust is needed

Hello i want to create a longboard that is powerd by an edf jet engine just would like to know how much thrust whould i need to me

Posted by paul the maker 6 weeks ago

Tool for vibrating concrete? (DIY?)

So I've been thinking of making some homemade concrete stuff with different molds I plan on making. Since I'm not a big expert on concrete and such I've been reading all over the Internet for how-to guides and what not. And something that seems to be a really good idea is to use a tool to vibrate out the bubbles and air pockets from the molds before they set... and so far I've not found any instructable here on how to make such a tool ( because it's a bit expensive to buy one, and hey.. why not make it myself) So my question is simply if any one know of a good idea of such a tool, how to make one or whatever.. (maybe modifying something, making one from an electric motor?) I need ideas!  

Posted by Mr_And3rsson 7 years ago

Time constants of batteries ?

Hi,I'm trying to figure out the way solar battery charger work and I'm a bit confused about the following point.I read that for batteries you could consider the PWM voltage to be equivalent to DC. This I understand well for average voltage (obviously it's the same), but what about the dynamics ?If your PWM frequency is something like 100 kHz, that's a 10 µs period. Does the battery has time to follow and make big voltage and current peaks or does it just averages all that to more decent values ?One way to put it is : Are the battery time constants indeed much bigger than the PWM period ?Thanks for any idea on that topic !

Posted by Emmanuel2015 7 weeks ago

Native iOS and Android App Retirement

Hello Community! In an ongoing effort to make sure that Instructables is able to focus its product development efforts where they count most for existing an new authors, we are officially retiring our native iOS and Android apps. Note that this does not affect mobile web. I expect continued investment in mobile technologies for years to come, but we will focus on the experience of people using Instructables through their mobile web browsers, rather than through downloaded apps. For those keeping score, this isn't exactly news. We have not released new versions of either app in over two years, and they have become steadily buggier and buggier during that time due primarily to changes in their respective environments. Android 2 and iOS 5 were current when we released them originally, and Android 7 and iOS 10 are very different beasts. Simply keeping up -- even without adding anything new or fixing any bugs -- requires a constant investment of development time from Instructables, and prevents that time from going to projects with greater impact. The original purposes for the apps were: 1) To lower the bar to Instructables authorship by providing direct access to upload photos taken on smart phones 2) To improve the browsing experience by making it faster Since they were released, mobile technologies have progressed to the point that #1 is no longer a concern. Our mobile web editor already has full support for uploading images directly from your phone. #2 is also coming into striking distance soon, as browser manufacturers begin to standardize their implementation of offline content for mobile web sites, sometimes referred to collectively as "progressive web apps". We'll be watching these technologies closely, and we'll be among the first to speed up your browsing experience with offline components when cross-browser solutions become available. We have already developed (and will continue to expand on) Accelerated Mobile Pages, which mean we display nearly instantaneously when you tap an AMP result on mobile from Google. You can identify these pages via a lightning bolt in mobile search results: In short, the reasons that we developed the native apps no longer apply, and we're dropping support for them in favor of putting those energies where they are able to have greater impact for the community: Mobile Web. The apps will soon be removed from sale from their respective download stores. For existing users who have downloaded these apps and are using them currently: feel free to continue doing so, though we would urge you to upload your Instructable Drafts to the website as soon as possible. While we don't expect the editing process to break, no support is available should you experience issues in the future. You can also use the apps to browse Instructables, though I believe there are already some issues that have started adding friction to this experience. Thanks, all, for your continued support of our vibrant community! ~Devs

Posted by pseaton 1 year ago

Creating an electromagnet as powerful as an NeFeB magnet with same size

Is this possible?So I'm working on this project on levitation using superconductor and strong NeFeB magnets. I'm try to determine the possibility of replacing the magnets with electromagnets equally as powerful and of the same size if not smaller. But I'm bit skeptic about the idea as I'm not sure how possible it will be to construct such electromagnet (or buy them preferable). Is this something that is possible? can anyone reading this give me recommendations? thanks

Posted by gjimoh 7 weeks ago

Sheet metal input

Fixin’ to make to magnetic board and need some input on what to purchase. I’m seeing several types of sheet metal. There’s plain sheet metal, zinc plated, cold rolled, weldable, galvanized, etc. Is there a particular type I should purchase? Hoping to avoid anything that will tarnish or leave marks on any paper out on the board. Thank you for your input!

Posted by jpmarth 8 weeks ago

Solar Powered Electric Wheelchair

I would like to put a Challenge out there for anyone to come up with. You see, I am in a wheelchair and I would love to go hiking with my son, but my chair can only go so far before it needs to be plugged back into a socket. I hate this, because it keeps me from going most places I want to go outdoors. But it dawned on me that if I had a Solar Powered Option to my chair, nothing could hold me back from being outdoors again. Ok yah,  it would help if I could redesign the platform & wheels too, but that's not the most important part... I NEED POWER. So, if anyone feels like taking on a new challenge and you are into Solar Power perhaps you could help me in this way. Thank You for your time in reading this, I hope to plant seeds of inspiration with all of you! May Love Light Your Way, Blessings! 

Posted by CherishJames 1 year ago

Launch Stats Not Working

11 days ago I reported that the Launch Stats on my members page was not working ... it was working but suddenly stopped. Others have the same problem too but to date there has been no response from those who manage the website.Reposting as perhaps my first post has been missed?

Posted by lingib 3 months ago

Need a USB-Controlled lock box

Google led me here, and I have to say that I'm very impressed with the ingenuity of the people here! Hopefully someone here can help me. I'm trying to find a USB-controlled box. The box can be quite small, as it needs to contain just a single key. As for the USB part, I can go two ways: first, I would need the state of the box lid (i.e. open or closed) to be sent via USB to the computer. Or, the second alternative would be that the box lid would only open if a certain signal was received via the USB cable. I can do the software programming to either send or interpret the signal, it's the mechanical part I can't figure out. I would happily pay someone to build this for me. Any suggestions? Thanks! Lee

Posted by Indecisiveo 10 years ago

My condo apartment smells of chemicals like paint.

I am living in a condo (apartment Building, 2nd Floor). For the last 5 days my house smells of chemicals like paint or something very close to the paint . In the living room we have small office area with computer and printer where smells very strong. Also this smell is in the kitchen, in the bedroom, all over the apartment. I am the only one that can smell it. It is not paint. The refrigerator works ok, the stove is electric and the furnace is turned off.  The Consumers checked for gas, but there was non. Who should I call in order to come and detect where  this smell is coming from? 

Posted by Aladana 3 years ago

Help connecting a Led strip to laptop power source.

Hi all, I want to illuminate my laptop keyboard and since the name of the device is LAPTOP meaning it is a mobile device, the tutorials on Youtube were not that promising ... and trust me I searched a lot. I work at a lighting company, we have tons of led stips ... the lowest is a 12V 7W LED strip and that's 7W per meter ... the closest CUT-HERE mark on the strip involves 6 SMD LEDs which is enough for me, this strip doesn't overheat, I put my finger on it.  The question is it possible to solder these 6 LEDS to the 12V DC power jack of the laptop or the USB power (+ / -) port ( on the mainboard ) .... as for the strip itself, I can install it on the Laptop Chassis, not necessary inside te Chassis in a very neat way. can it be done? is there any risk on the laptop ? .... will the USB still be usable ? ( again I don't want to plug a USB cable to power the LEDs I want to solder on the USB port on mainboard) Thank you

Posted by ElGringo82 2 years ago

Friendship Lamp

You may have seen these online selling for ridiculous priceshttps://www.uncommongoods.com/product/long-distanc...But it occured to me how easy this would probably be on arduino. Do any of you know what would be the bare minimum you would need to get this to work? I would assume you'd need them to connect to wifi, and just send a simple signal but I'm not quite sure how to implement this. Any ideas from those more knowledgeable in the particulars?Thanks,

Posted by gravityisweak 2 months ago

What is the most affordable laser cutter for a beginner?

I really would love to try out laser cutting. ..But have no idea what knowledge it requires. I want to be able to design and cut custom wooden puzzle, laser cut fabric and also to cut felt and foam. I would like to start up a small home business. Keeping in mind that I have no clue what knowledge it requires and also know that I have 4 kids and will have to have this machine in my home. I do own a silhouette cameo but unfortunately it does not cut felt or wood. It’s a fun machine for cardstock and all…but nothing heavy duty. So is it safe to have a laser cutter at home with kids?? I mean will the light or whatever that comes off the machine be harmful for my children? Also how much is the cheapest desktop version? Will it be able to cut large fabric? Can it cut 0.5” or 0.75” hard wood?? Would that be pushing my luck?? Please let me know…so I can start saving up for it. I really really love crafting….but availability of items and affordability is a big issue. Thanks!

Posted by shazni 2 years ago

Control Amperage

Hiyas, I was wondering if you could point me in the right direction. I was wanting to build or buy something I could control Amp input. The system would be 12 -14 v dc and I want to be able to limit the input to say... 25 - 30 amps. So if a system would naturally draw more amps I want to be able to control the system be limiting the amp input...if that is making any sense. Got any thoughts ??? tks Huchleberry

Posted by huchleberry 10 years ago


Im looking for a two man go kart fram reitivly big just frame and wheels is all i want cuase it wont look the same when im done withit any way im only 13 so i really dont have a big budget.

Posted by the iron engeneer 9 years ago

Is writing an art form?

Is writing considered as an art form? I think it is. You create highly emotive pictures using pen and paper instead of paint or other mediums. Your opinions?

Posted by super moderator 9 years ago

Dremel Micro Repair/Reuse

Recently at the end of 2016, I acquired a Dremel Micro cordless rotary tool from a garage sale/yard sale for about $20. I used it maybe 3 - 4 times until it didn't want to hold a charge for long. Basically when I put it on the charger, the LEDs scroll top/down indicating it is charging but after a minute or two they stop their normal scrolling sequence and they all stay lit up, which isn't even mentioned of in the manual. The fuel gauge battery indicator shows up red meaning it's near its battery life. At this point, I'm considering either to salvage the motor or buy a new battery for the dremel (which are 2 Sanyo 14650 batteries that are soldered onto a circuit board inside). I'm just wondering is there something that I have failed to do that would make the dremel not hold a charge? Thanks in advance!

Posted by TXVisual 1 year ago

Rescue a defunct phone charger

I have an old cell phone charger that is very handy for charging my Kindle Touch and a set of Bluetooth earbuds. It quit working one day after someone used it to charge a high demand device. I read that the capacitors in these often fail. I got two electrolytic capacitors at a surplus store for less than a dollar total. I had to use a fine saw to open the plastic case. The new capacitors were the same electrical size, but not the same physical size. Closing the plastic case was not an option. I covered all exposed electrical contacts with hot glue, which is an excellent insulator. It looks ugly, but I have a good versatile charger again. (The high voltage connections are buried deep down where my fingers can not reach. As best I can tell, the terminals covered with hot glue for insulation are all low voltage.)

Posted by Phil B 7 weeks ago

Foam Board/Cardboard Shoes

Hey, I was walking past my little sister watching PBS Kids and on one of the shows this girl was trying to make her own shoes. Out of cardboard. Lightbulb. The only reason that they didn't work is because they got waterlogged. I am thinking that with good enough sealing and strong enough glue, useable shoes made from cardboard are a possibility!The only problem is that I don't have foamboard or time to spare or a working camera at the moment. If anyone could carry this idea further than me, have at it!

Posted by Thorondor95 3 months ago

Any idea how to build something like this Blood flow restriction device?

I saw this https://www.bfrshop.com/products/signature-series-...And now im thinking about building one, but i don't know what parts i should or can use for it. Any suggestions?

Posted by jonathans401 3 months ago

Extracting lead from car batteries?

I have a couple of battered old car batteries. There is no local scrap dealer that will take them so I was wondering if it would be possible to extract the lead myself and sell it for scrap. I have searched on google and cannot find anything about this and I suspect it would be dangerous and impractical. However I thought there's no harm in asking here. I was imagining that I could open the battery up and pour the acid into some kind of strong alkali, neutralising it to make it safe for disposal. But then, I certainly wouldn't like to try this without some advice first. Cheers! Pete

Posted by peater 8 years ago

Receive arduino midi controller notes with android

Hi, I've made a midi controller follow this:https://www.instructables.com/id/Add-MIDI-port-to-K...It works fine on my computer and all of my DAW like Cubase, Mixcraft and...But when i connect my Arduino Usb cable to my computer (Only for power cause i'm not using batteries) and my Usb to midi cable to my phone, My midi keyboard does not produce any sound, I use many different apps like Midikeyboard, Perfect piano, Midiscope, Walk band and etc... But it doesn't works...What is the mistake?Note: When i connect my midi cable to my computer the red led on the midi-to-usb cable switch On only when i play a note but when i connect it to my phone the red led always stays On! [See attached image]Note: My phone supports midi keyboard and running on android 6.0.1.Thanks.

Posted by JavadK9 6 months ago

Lipo battery cut off

I'm using a couple of Lipo batteries to power a speaker on a trailer, I bought 2 low voltage alarms that plug into the balance cables but upon testing I found it to be unlikely that I'll hear them over the speaker. So would it be possible to modify the alarms so that they activate some kind of cut off device attached to the power cable instead? Each battery is 4s 10000mah.

Posted by ambientvoid 8 weeks ago

Hi, I'm a student and I'm looking for an experienced partner for help with my project :)

Hi, my name's Chaitra and i'm a 17 year old product design student in the UK, doing A level product design.As part of our coursework, we are required to find and interact with an "expert", a person with a good level of understanding of product development and technology.As you might expect, it's quite hard to find someone like this at random, which i why I've come here to see if anyone is willing to collaborate with me :)My coursework will be based on air conditioning, specifically regulating and purifying air conditions during sleep, so it will involve a good amount of electronics and physical design. As the "expert" of my project, we might exchange ideas and offer suggestions to improve the project, and even maybe advice on the best ways to manufacture the final prototype for assessment. You can be as involved as you want to be honest, I appreciate that everyone is busy so you won't be able to commit a huge amount of time to this, but maybe exchanging emails around once a month? I might send over some sketches / cad files over email for you to evaluate and suggest some improvements or ideas on, nothing more than that.If you're willing to help, please answer this topic so we can work something out! Thanks a lot :)PS. this is my first time using instructables, if I've submitted in this wrong place or something, please let me know

Posted by chaitrakawathekar26 3 months ago

Need a receipt for Pro Membership Purchase

I purchased a Pro Membership for a program we run at a school.  I need some sort of receipt for the membership purchase to give to our accountants so i can track it in my budget.  Is there a way to get one? I tried emailing a few times but only got back automated emails in return.  Thanks for the help..

Posted by ecorral 7 years ago

Enter existing instructable into contest

How do I enter an existing instructable into a contest?

Posted by TexasBaconMan 6 years ago

Im not even familiar with electronics but I would like to reuse this Bass AMP HB-20B

Hello, I have recived an Bass amp from a friend , obviously since the TDA2030A chip went wrong, his friend built new one amp and gave me his amp.The chip is the one mentioned is up typed, still works fine, now What Im trying to do is make stereo, since the Bass amp is mono,https://www.petervis.com/Electronics_Kits/TDA2030A...This is the site , I only need to make bottom circuit, but the issue is that this one is prebuilt by manufacturer and has volume knobs, Low, Mid1/2, and high equalization, has input 1,2.I mean this https://www.thomann.de/gb/harley_benton_hb_20b.htm(note about this link, its not that correct one)It sounds good for my usage, but since I wanna add another chip of it and make it stereo I need help, since Im complete idiot, and I wanna keep the Equalization.Here are few pics.https://ibb.co/c7wbcehttps://ibb.co/ktuwceI hope you understand me.Thank you!

Posted by Albert1999 2 months ago

Error message while publishing Instructable

I was trying to publish an Instructable. The icon that says "Generating Image" was going, then this error message popped up: "Oops! We couldn't understand your request. Please contact us to tell us as much detail as possible about what you were trying to do when this happened."So, being an obedient citizen of Instructables.com, here are a list of details of what I was doing:-Publishing an Instructable into Outside, Camping, Creative Misuse Contest-Windows 10 with Microsoft Edge-The PC went to sleep sometime after all my photos finished importing, maybe severing a connection (I don't really know what I'm talking about, btw)-I had perfect internet connection to my knowledge after I woke up the PC and started on my InstructableHope this helps, Auf Wedersehen!____UPDATE____I immediately went back to my draft and tried again, and successfully published my Instructable. It must have been a small glitch or something, thanks for the help you didn't have time to give! :)

Posted by Thorondor95 2 months ago

Plastic recycled 3D printer

Planning to design a 3D printer that takes plastic bottles as input, I mean long narrow pieces of plastic bottles are fed as the printing filament. What will the difficulties in realizing such a design?

Posted by SHAMSUDHEEN MARAKKAR 2 months ago

WheatStone bridge

Recently i studied the wheatstone bridge in me physics book in class but i could not understand it properly. I asked the teacher about my confusion but he also dont know. i have posted the picture of topic(wheatstone bridge). My question is ;1.Why current I1 is following through point A to D in loop ADBA. 2.Why current I2 is following through point D to C in loop DCBD.My confusion is that why current are following through these two paths. As current always flow through level of a higher potential to a level of lower potential but here it seems opposite.

Posted by DabuHackker 2 months ago

Contest FAQ (Frequently Asked Questions)

Here at Instructables we run a ton of contests! We also get asked a ton of questions about those contests. Below is a list of the contest questions we get asked most frequently and also some questions that we feel could use a little more explaining. (Let’s be honest - reading the official rules is not fun.)Please ask addition questions in this forum topic - I'm sure there are some we have not covered! General Contest Questions How do you choose which contests to run?We do this in a few different ways.Contests are planned based on past contest themes, what’s trending in search, which categories/channels need a little love, new site features or if there’s a certain type of content we want. Contest ideas also come from staff meetings and through the official contest idea forum topic.I have an idea for a contest! How do I tell you guys?Please post here and let us know! We can’t run all of them, but we love seeing the ideas you guys come up with. How do I win a contest?Post something awesome! Check out this collection of tutorials that will tell you how to write a great instructable. Why do Instructables employees enter the contests?We enter contests to set the bar and give an example of the type of entries we want in the contests. We're not able to win them, though!It's important to note that several employees were authors on the site before they worked here, though, so you might see some wins in our achievements! :) Entering Contests Can I enter if my country is not listed in the official rules?Yes! You can definitely enter.However, you must have a mailing address in an eligible country to win. If you have a friend in the US or another eligible country that can receive your prize, go ahead and enter!You can read more about our progress to add more countries to the eligible shipping locations here. I live in -----, why can't I enter?!Chances are your country has incredibly strict laws regarding gambling, sweepstakes and contests. We try our best to play by the rules, and if we can't meet the minimum requirements to run a contest in your country, we don't run them there!That's the easy answer. The hard answer is that it's very complicated and involves lots of risk and scary legal language. Why isn't my entry showing up in the contest? I entered three minutes ago!Real humans look at each entry! This means it take take a while sometimes. We work standard office hours, 9-5ish PST. We tend to moderate first thing in the morning, Monday-Friday.If you enter at the end of the work day or over the weekend, you may have to wait until the next business day to be accepted. Why can I only enter one contest with one Instructable?It’s all the spirit of fairness. In the past, we've had popular instructables sweep multiple contests with huge wins. This new rule will allow more authors to win! Why was I rejected from the contest?The number one reason for this is not fitting the contest theme - we try our best to explain the sorts of entries we’re looking for on the main page of each contest, so double check your eligibility there.We also sometimes make mistakes or encounter bugs during the approval/denial process. (Checking the wrong box, clicking the wrong button, breaking the back end of the site) It’s rare, but it happens! We’re human and can’t help it, but we do our best to right those mistakes as soon as we know they happened! Why can’t I enter an instructable I published before the start date into the contest?We want to see NEW and exciting content built just for the contest. If we allowed old instructables in, we’d just see the same things over and over again. Plus, the number entries in the contests would make it very hard to choose finalists and winners.Keep in mind that simply republishing an old project will not make it eligible - we check for that. ;) Can I edit my Instructable after it's entered in a contest?Short answer: YES!Long answer: You can make any modifications you want to an Instructable that's already entered! We get so many entries that there's absolutely no way we'd be able to police it even if we wanted to - but it's never something we want to discourage.Improvement is always a good thing as far as I'm concerned. :)However, we must caution you: it's best to get those changes done before voting closes. The voting period matters the most because that's the time that we start looking into picking finalists.Another slightly related caveat: don't publish a mostly empty instructable and try to fill it after the contest ends. We're starting to see this happen more often, always with a promise that updates are coming. You can never tell when we'll be reviewing it as a possible finalist, so chances are you'll get overlooked going about it that way. We are currently looking at 50-300 entries per contest, so anything incomplete doesn't stand a chance these days! Finalist & Winner Selection When are the finalists selected?Finalists are selected starting the Tuesday after the contest closes. The finalist selection process normally ends Thursday of the same week, depending on how tricky the contest is and how many people give input. How are finalists selected?Finalist selection is a mixture of votes and staff choices. We look for all kinds of things when it comes to picking finalists, including: Good photos! Pretty photos put you five steps ahead of all the other entries already, honestly. We're going to want to click through and look at it as soon as we see it if it's pretty! Good explanation of both WHAT the project is and HOW you made it. Sometimes it can be really hard to figure out what we're looking at. (Personally, if I have to spend several minutes staring at photos and reading to understand it, I'm not very excited about it anymore.) Try to convey the project through both photos and video if it's needed. For example - if it's a rocket, upload a video of it in action! A good story! I read more projects than you could ever imagine every month. I love it when an author takes time to explain why they made the project, or documents the errors they made along the way. That makes an instructable so much more enjoyable to read. :) Citing your sources/inspirations - look, we realize there's hardly an original idea on the internets anymore, so we can't fault you for that. But it's only fair to give credit where credit is due. We like that. Plus, it sometimes makes for an awesome story. Creativity! Look, I cannot even begin to tell you how many paracord bracelets, Altoid tin survival kits and Iron Man arc reactors I have looked at. My eyes glaze at the thought. Don't just go for the common and easy, take that project and put a new spin on it!!Relation to prize. In some contests, we offer a Judges Prize. Entries that qualify for this prize are also taken into consideration. We always suggest authors read their own work with an objective eye. Does it make sense if you aren’t familiar with the subject already? Did you provide enough description? Are the photos understandable? How many finalists are there?To find this out easily, go to the contest page and look at the total number of prizes to be awarded. The number of finalists for a given contest will match the number of total prizes. Why wasn't my project chosen as a winner/finalist?This can happen for all kinds of reasons, honestly. See the "How are finalists selected?" question above for a more in depth explanation of what we're looking for.The most important thing to stress is that we are going through TONS of entries for every contest, so it's important to set yourself apart. Choose a clear and concise title, tell us a story, share great photos, explain the project well. If there are projects similar to yours in the contest already, make sure your project exceeds theirs in awesomeness. Also remember that competition is fierce in the contests - there are always a LOT of amazing entries. When it comes down to selecting winners sometimes it's the little things because when you're comparing awesome to awesome the little things are all you can look at. So be detailed orientated when writing your instructable. Judging Who judges the contests?This is typically a mix of Instructables staff and authors on the site (your peers!). Each contest is normally assigned 10-50 judges.Lately we’ve had an average of 15-20 judges complete the process. I always try to add as many judges as possible, because more judges means the judging is more fair and helps to reduce bias. How can I help judge a contest?If you’re interested in helping us judge, check out this forum topic! To judge, you must have published at least one Instructable.We send out PMs to judges on the Friday after a contest closes. How do I judge a contest/access the judging ballot?We’ve written up an Instructable over it! You can find it here: https://www.instructables.com/id/How-to-Judge-a-C...Once you're added to the list of judges, you’ll be able to access the ballot. Prizes How do you pick prizes? Can I suggest prizes?We've got a pretty small budget prize here, so it's a mix of trying to be frugal but still give you guys something fancy. We try to order most of our prizes from Amazon.com because they have reliable shipping and tons of options.If you'd like to suggest an awesome prize, do it here! I don't like these prizes, can I trade?Short answer: nope!Long answer: we choose prizes well ahead of time and order prizes at the start of the contest (for 95% of what we run) and we don’t make substitutions. We typically have anywhere from 100-250 winners a month (and increasing all the time!), so it’s not feasible to give choices and sub things out. Only three of us on staff work with ordering the prizes and shipping them out, so that would be lots of work!However, we have allowed winners to switch prizes with another winner on occasion (both parties must agree and let us know before we ship them!) and we’re fine with you selling your prize somewhere else. How do I get my prize if I win?When contest winners are announced, we’ll send you a message with a form to fill out. Make sure to fill this out completely and remember that we require a phone number and that we can’t ship to P.O. boxes.Winners are responsible for any trade tax or tariffs incurred for shipping to your location. We cannot reduce the value of the prize so you pay less tax (nice try, though, you sneaky hobbit!!). When will my prize ship?We try to ship prizes as soon as possible! 75% of our contests have prizes that are easily shipped right away and you should receive notification of shipment within a week or so.Sometimes we do have to order items AFTER the contest ends or wait for a sponsor to ship the items. If we think there will be a delay, we’ll let the winners know. We’ve been trying very hard to make sure we’re reaching out and updating winners about prize statuses.Also: VERY IMPORTANT - the sooner all winners give us their contact info, the sooner we can make big orders of custom sizes. Sometimes there’s a huge delay just because we’ve got one straggler. Be a good winner and let us give you prizes, dangit!!

Posted by jessyratfink 4 years ago

Zipfizz Containers

I have a bunch of empty Zipfizz containers. I don't want to toss them in the trash (no plastic recycling in my area). What in the world could I make with them that would be useful?

Posted by jwade19 5 years ago

How to combine charge from solarpanel(3w,6v) and 6v d. C generator?

Combine charge from solar panel and dc generator and charge the battery.

Posted by prasad1909 2 months ago

Image Problems

Hey everyone, I just joined today. I was working on my first instructable, I tried to uplad an animated gif I made showing what it does. Well the gif is bugging out, and I can't figure out how to delete it from my library. So two questions: 1. Can animated gif's be uploaded somehow that won't mess them up? 2. How can I delete things from my library? PS: Is this the right place to post this?

Posted by oshihari 5 months ago

Is anyone skilled in metallurgical engineering?

*Yes, I know, another question involving college and my future life.*I am kind of split between mechanical engineer and metallurgical engineer. They both have some great benefits and trades that I'd love to go into, but it's difficult deciding which would be better for me.I do aspire, no matter what field I go into, to weld and do other metalworking, although I don't just want to weld for people. I know it sounds weird, but I like to take the time to know about what I am working on, and not work at "face value", if you will.So, any mechanical or metallurgical engineers who want to try to sway me one way or another, please do so now. ;-) Thanks,Bran.

Posted by Bran 10 years ago

Support contact problems

Hi, Is anyone else experiencing problems contacting the Instructables support team via email? I have tried to email them via different channels three times now but it comes back as non-existent email address.... ironically the reason I'm trying to email support in the first place is because despite changing my contact to a new email address in my personal settings, emails are still being sent to my old email address. If anyone knows how to get through to support or if they are having the same issue maybe we can join forces to resolve it..? Cheers!

Posted by PabloDee 5 years ago

1381-J replacement for Miller Solar Engine?

I know BEAM robotics have fallen out of style a bit, but I hope someone is still mucking about with them because they are super cool.  I am working on a Miller Solar Engine and trying to find a replacement for the 1381-J voltage trigger. I tried out the DS1817. It was recommended to me by one the technicians at Digi-Key as a replacement for the MN1381-J and on paper it looks like a good swap, but in the circuit it is just not resetting once the voltage drops.  I have it breadboarded and I can stick the 1381 in it and it works perfectly.  When swapped with the DS1817 it triggers once the top voltage is reached, but then never resets (it just drains forever.)  I double-checked the component type to make sure it was just not a miss shipment of the wrong item, but it checks out.  And I tried swapping the DS1817 component out thinking that I just had a dud (or 5) but it does not seem to help.  Any thoughts? Here are the data sheets on the 2 items. http://datasheets.maximintegrated.com/en/ds/DS1817.pdf http://www.semicon.panasonic.co.jp/ds4/SAG00003CEM_discon.pdf one bit of weirdness I already figured out is that the 1381 looks like it has a different 1-2-3 pin out sequence at the top of the PDF but it turns out it does not at the bottom.

Posted by kaczchris 5 years ago

Need Strong Wire Coat Hangers for projects

Where can the strong dark clothes hangers be purchased? If you purchased good ones from Amazon, please indicate which ones were the good ones...Thank you so much

Posted by DoraS14 2 months ago

An awesome website I found for sharing the tools you use in your Instructables (or for anything else!)

I recently found a free website called Kit.com, and as the name implies, it's a website for making kits of the stuff you like and useSo far, I've made a bunch of different kits such as " Dremels & Rotary Tools: All of The Accessories You Need" " My MUST Have Workshop Tools I WISH I Would've Bought Earlier!" (And several others that are organized on my Kit profile page)I think it's a pretty cool website, and encourage everyone to make their own kits of the tools and stuff they use in their projects! If you make your own kits, link them to your Instructables profile page (Like I did with Linktree), and post a comment below so can all see what you use and waste more money on tools we're sure we need! :)They also have an option for embedding the kit in a website which looks really nice (see this, though when I tried it once it looked a bit different), but unfortunately Instructables doesn't support it... (hint-hint!)You can also create an affiliate code, so when people buy through the links, you earn a few percent of the sale, which is pretty cool too!Maybe unrelated, Kit was just acquired by Patreon so if you read this in the future it might not be free. I have no idea. Also, if you're an SEO genius you need to tell me how to make it so my kits rank on Google!Post a comment if you make one!

Posted by Yonatan24 3 months ago

Tin Can Turbine Engine

Hello!               Let me give you some insight into this project (Tin Can Turbine). I'm going to school to get an Airframe and Power Plant Cert. (Aircraft Mechanic). I stumbled across this idea on YouTube one day in class and it really got my gears turning. It's purely for fun, and I'm not even sure if I have the technical skills to get it to work.             First of all the way a turbine engine works in layman's terms is Suck, Squeeze, Bang, Blow. The fan section sucks air in from the atmosphere, Where it is moved to a compressor section which squeezes the air into a tighter pocket of air; which makes the air hotter and more explosive. When the compressed air is pushed into the combustion chamber, it is more volatile than normal air due to the compression. When you add a fuel (jet fuel, gasoline, propane, kerosene etc...) it will ignite with the compressed air (given that there is a spark to get the fuel vapors to ignite). When the fuel/air mixture is lit the fire will continue to burn without an ignition source due to the explosive nature of the compressed air. And the gas (burnt fuel/air) is pushed out the exhaust. There are blades in the rear of the engine called turbine blades, which are connected to the front of the fan/compressor section, in some cases there are two or three turbine blades, which drive the fan, compressor sections independently. Due to the turbine blades being pushed by the exiting gasses, the engine becomes self sustaining. And through black magic, you have a jet engine!!!              I'm going to attempt to construct a jet engine (not a motor!) out of a "tin can". I'm really not going to use a tin can, I'm actually going to use .032" thick 3" wide, and about 6" long exhaust piping made out galvanized steel. It's a lot thicker than a typical soup can, thus willing to stand up to more heat. My proposed fuel source will be propane, because it's cheap, and the I'm sure that I'm capable of controling the amount of fuel going into the engine. I'm not sure yet how many fan blades vs. turbine blades that I'm going to use. Right now I'm in the experiment phase. My blades are going to be made out steel can tops, because there is very little cutting involved, beside the actual cutting and angling the blades. and they fit perfectly into the pipe. As for the fuel delivery i'm going to use a copper pipe that is approx .042 thick and hallow. I'm going to cap the end, and wrap it around the inside of can. There will be eight holes drilled into the copper, which should give it plenty of fuel at equal pressure all the way around the can, equals same heat all around.         As for the drive shaft, I'm not exactly sure of what to use for that. I may want to go with something hardened already, so the heat surrounding it won't melt it. (that's the hope anyways) . I'm also not sure of what sort of bearings I will use. I was thinking skate board bearing with the plastic crap around the middle taken out (so it doesn't melt and seize the bearings) and extreme high temp. white lithium grease for lube.          This is an experiment and I guarantee myself absolutely no success. But I think it will be fun to try. Questions or comments are more than welcome. Please, if you see any problems with the design, let me KNOW!!!

Posted by shawnpc 6 years ago

Husqvarna chainsaw carburetor adjustment tool

I just worked on a Husqvarna 142 chainsaw for a friend. Yes, there are openings in the side of the machine so the Low and High carburetor screws can be adjusted, but a special tool is required, or parts need to be removed from the saw so the screw shanks can be grasped with a pair of needle nose pliers. A special tool is svailable for about $6 US. It fits over the longitudinal ridges on the upper part of the screw shank. I discovered the right size of semi-rigid plastic tubing makes an effective adjustment tool. Just cut a length three or four inches long. Push one end onto the desired screw shank and turn to adjust. The tubing is rigid enough that it does not twist, but turns the screw needing adjustment.

Posted by Phil B 5 months ago

Salt and water etching

I made an instructables about salt and water etching https://www.instructables.com/id/SALT-AND-WATER-E...as I learned it in a jewelry class, so I never tough about been unsafe. I posted it as I tough it was a nice one to share, but I'm having some comment on how it should not be safe using stainless steel in this project. As I don't have absolute knowledge about this before, and I just report what I learned, I was wondering if that was correct or not. (I know sometimes people comment very random stuff). Anybody know something about this topic?

Posted by marcellahella 5 months ago

Keyboard problems

When I was cleaning my PC keyboard buttons G(because typing "G" character letter got some lags) and F(now it's not working I was cleaning Windows logo button and it's still working properly and in opposite side of this button is down when I loosen it, it skews diagonally.[img]https://i.imgur.com/pODvObr.jpg[/img][img]https://i.imgur.com/r6x5LyC.jpg[/img][img]https://i.imgur.com/OuotzUb.jpg[/img] It was when I was cleaning my keyboard with ear sticks slightly soaked in spirit(alcohol based liquid with transparent colour)[img]https://i.imgur.com/uBpBGEm.jpg[/img] can you help solve me this problem?How can I fix it?Should I buy new PC keyboard guys?

Posted by luke11685 2 months ago