The forums are retiring and are now closed for new topics and comments. The existing content will remain online and accessible through 2020 to provide everyone the opportunity to save any relevant information. In the spring of 2021, these Community forums will be taken offline.

Topics


Retiring the Forums

After more than a decade, Instructables has decided to retire our forums. This exclusively pertains to the "Community" section of this website where this topic is posted. Step-by-step instructable tutorials will not be affected in any way by this change.Starting in October we will no longer allow site members to post new forum topics in the Community section. The existing content will remain online and accessible through 2020 to provide everyone the opportunity to save any relevant information. In the spring of 2021, we plan to take the Community forums offline entirely.This decision was not made lightly. For many years we considered these pages the heart of the community. However, times have changed. It’s with some sadness that we need to acknowledge this and adapt.Our biggest clue that it was time to retire the forums came as our site traffic more-than-doubled over the last few months. We observed that the number of Instructables being published increased, the number of comments increased, the amount of favoriting increased, and just about every other measurable form of participation on this website also increased. The one notable thing that did not increase was the number of forum topics being published. We continued to receive, on average, about one a day.This forced us to look at some hard truths. The first is that the world has changed. In 2005 our forums offered a big tent to the maker community at a time when there were few places to go and interact socially with a cross-section of like-minded individuals. However, most of the conversations that used to happen here have now moved to either social media, Reddit, or niche forums elsewhere on the internet. No one builds general discussion forums like ours anymore, and most others have gone extinct a long time ago. The other hard truth we had to reconcile with is that fundamentally our core business is not running a forum. Nevertheless, we spend a lot of time keeping them up and running. For every valid forum topic that gets posted on the site, we get about 50 forum topics that get caught by our spam filter and end up having to be reviewed and deleted. In addition, the forums are based on some of the oldest code on our website, which means they tend to break often. Keeping them up and running distracts energy from our very small team that could be better used elsewhere. That said, there are now more places than ever that you can go to discuss making online. For starters, you could connect with us on Twitter or Instagram where we have a thriving community. You should also check out some of these awesome staff-recommended channels and sites: https://www.reddit.com/r/DIY/https://www.reddit.com/r/somethingimade/https://www.facebook.com/groups/iliketomakestuffhttps://www.reddit.com/r/woodworking/https://www.reddit.com/r/turning/https://www.facebook.com/groups/1470897969674485/https://www.reddit.com/r/3Dprinting/https://www.facebook.com/groups/FunctionalUseful3D...https://forum.arduino.cc/https://www.reddit.com/r/arduino/https://forums.adafruit.com/https://www.therpf.com/forums/https://www.ravelry.com/discusshttps://www.reddit.com/r/instructables/We thank everyone for all of their contributions to these forums over the years and the community you helped make flourish. We welcome everyone to share your thoughts, feelings, or memories below.

Topic by randofo    |  last reply


COVID-19 Adjustments to Instructables Contest Prizes

As the world adjusts to concerns over the spread of COVID-19, the Instructables team has had to make necessary changes to our contest prize system.Physical prizes along with the supplemental “prize packs” (t-shirts, notebooks, mugs, etc.) are typically shipped from our office in San Francisco, which is currently shut down and workers have been sent home as the city is under a shelter in place order.For the foreseeable future we will be replacing ALL physical prizes with digital gift cards equivalent to the value of the prize (including the value of the “prize pack” when applicable). The values of contest prizes and prize packs are noted in the official rules of each respective contest.Individual winners of currently-running contests will be notified with additional information after contest winners are announced. Please be advised that we, like all that have been impacted by the spread of COVID-19, cannot say when we will be able to return to our regular prize shipping practices. We know you love the robot t-shirts, mugs, and other goodies, and we hope to be able to return to regular shipping practices as soon as we are allowed and able.Thank you for your patience, understanding, and all-around general awesomeness. We have the best community of authors and makers, and we absolutely love you!Stay safe.Instructables Community Team

Topic by seamster    |  last reply


Welcome to Instructables

On this page you can find links to some of our most frequently asked questions. What is this site? Instructables is a community for people who like to make things. Our community shares what they make in a step-by-step format that we call an Instructable.How do I post an Instructable? We offer a free and easy online class to coach you through posting your first Instructable or you can just wing it and start a new one today. How do I get help improving my Instructable?Ask the community for help in The Clinic. How does my Instructable get featured? The best way to get your projects featured is by following the Featuring Guidelines. Where can I learn more about contests? Our Contest FAQ has all of the information that you need to know about contests. What contests are launching soon? Check out our list of upcoming contests. Are you on social media? Yes! Follow us on Pinterest, Instagram and Twitter. How do I contact Instructables directly? The best way to contact us is through our Contact Page.

Topic by randofo    |  last reply


Can I refill a disposable lighter with something besides lighter fluid?

I found an old empty lighter. Can I refill it with something besides lighter fluid? Like axe or something?

Question by Shadow94    |  last reply


Can a vacuum balloon be built with current material technologies? Answered

A balloon's bouyancy (lifting force) is a function of how much air it displaces. Today's balloons use hot air, hydrogen, helium and other lighter than air gases for lift. In 1670 Franceso de Lana, an italian monk, proposed the use of a vacuum. One major problem is how to make the structure light enough to support a vacuum without collapsing in on itself due to the outside pressure.

Question by sansoy    |  last reply


Wanted Arduino code writer (will pay)

Hi friends. I need someone to help me write Arduino code for my project. I will pay 20 US$ for each code you make...will put the money to your paypal account, or if you like can order something for you from EBAY and ship to your address.. please msg me I send you the flowchart and what the code is sopposed to do. Thanks

Topic by goldenshuttle    |  last reply


PC Rife software home-made plasma globe: Anyone do this ?

I have been self-treating various illnesses for a while now using some bio-electrical methods. One of which is the resonance method developed by Dr. Royal Rife in years past - but modernized using the PC as a freq. gen. and an audio amp to process the output. Some info on the various methods and specifications: http://www.introductiontorife.com/poor_mans_rife.html http://www.royalrife.com/lists.html http://www.rife.org/ http://www.electroherbalism.com/Bioelectronics/FrequenciesandAnecdotes/CAFL.htm http://heal-me.com.au/frex.html http://heal-me.com.au/frex-pfa.html ( Related, and also fascinating:   http://www.royalrife.com/electronics.html ) The PC/Rife/amp combo works well, but the better way is supposed to be via a plasma-tube, which is very expen$ive. Another way to do this is by using a plasma globe with an audio input used to modulate the discharges via the frequencies; this is also too expen$ive for me right now. Some users here have come up with ways to make your own plasma globe with a HV supply and a big incandescent light bulb. Great. Now - how does one modulate the discharges in the bulb by overlaying or adding the Rife frequencies ? This question seems hard for most to understand and I was even told to make a 'plasma speaker' when I asked one of the experts-> great idea-> as long as one is a crazed audiophile with $$$ to burn and a high resistance to exposure to pure/fresh ozone. (No thanks for me.) Is there any really smart person here (who understands my question...) with good suggestions for how to do this without 1) spending a bundle 2)massive ozone generation in the room 3)massive injuries and/or fatal results ? Also I have seen where people do the light bulb/plasma globe thing related with experimenting on ballasts from compact flourescents - but again there is a lack of info on how to do this as well as any means to overlay or control it with a desired audio frequency. Thanks !

Question by vtsnaab    |  last reply


What should i do with an old USB Rf transceiver?

I Have Here An Old USB RF transceiver from a wireless Labtec mouse. It's not bluetooth and has some sort of reset button on the side of it. What should i make out of it?

Question by chriswillb    |  last reply


Is there a list of... creators on here somewhere that sell what they make?

I get that this place is meant to teach us how to make these things ourselves, but you also have to know a lot of tech, or have a space where you live to DO things like solder etc... I’m so frustrated when I see such amazing tech on here and want to buy it as an addition to my nerd cave but no one even seems to reply and just say, “No, I’m too busy even during a pandemic to make what is for me, like building a Lego set but for you is like building a Rover for NASA... from your wheelchair, BTW” I’m a nerdy guy who collects stuff from Showbiz Pizza and Chuck E. Cheese, like a couple of animatronics that run via their computer and can also be programmed to any mp3... Neon signs, posters and probably the largest collection of the animatronic shows media than anyone else(I said I was nerdy) but that includes asking their former CEO, Dick Frank, to borrow several of their SVHS masters to copy to DVD, just so that the community could finally close gaps in shows we didn’t have yet and up until 2010 had alluded us... So, I’m just trying to I guess find out, is it illegal or no allowed on here TO sell and I just missed that and if so, and you want to sell privately... please PM me if you sell, period! I mean, even wealthy people like money.

Topic by PizzaCam2020    |  last reply


what knex guns need inventing? Answered

i was feeling bored the other day so i started on an oodammo sniper. but i need help. does the knexers of ibles want a performance gun, model, big, reliable, what?

Question by Fred the evil puppet    |  last reply


Get FREE INTERNET Connections : How To

Http://www.metacafe.com/fplayer/849674/get_free_internet_connections_how_to.swf

Topic by ZGH-FILMs    |  last reply


12v brake and tail lights?

I'm trying to build a brake/tail light out of LED's for my motorcycle. How do I make the red brake lights brighter than my red tail lights? I'm using 3mm 12v (resister pre wired by supplier) and/ or have similar 10mm lights available too.

Question by dthing    |  last reply


Perpetual energy machine idea. Would it work? Answered

Hello, i had an idea today. A light powered by a solar panel that powers itself! You would need a small amount of energy to initiate the circuit's current, but i can only see one way why this could not work: Lightbulbs lose some energy as heat and a tiny percentage as sound. How could you counter this? Heat collectors? Any ideas? I think that I may be on to something here!

Question by The Jamalam    |  last reply


Rate My Drawing!

This is a portrait I drew of a friend of mine. It took me about 2-3 hours to complete. Please tell me what you think, thank you :)

Topic by FoxyPenguin94    |  last reply


FoodSaver Vac 500 pump parts?

I took apart my slowly sucking Vac 500 and discovered the plastic ring around the piston on the pump is broken and I'd like to replace the part.  Any leads?

Question by accelv    |  last reply


Five to ten 10MM LED require what power supply?

I am planning on making a LED reading light for my nephew, but I'm not sure what kind of power supply would be needed, or how long it would last. I have bought plenty of 10mm LED's and I'm planning on using one or two per light points, with there being five light points in an 8x11 inch space. What kind of power supply would I need for these? I was thinking of going with AA batteries, since they're readily available, but I'm not sure if I'd need one or four (put into one of those cheap battery holders, I think they're setup in series.) Also, is there a way to do it without resisters, or would resisters be required, no matter what? Thanks for any assistance! The Atomic Soul

Topic by TheAtomicSoul    |  last reply


Universal ultrasonic driver circuit - help required

I would like to build a few, properly working, ultrasonic devices.For example an ultrasonic soldering iron and an ultrasonic soldering bath.But some small ultrasonic plastic welder or cutter is nice too :)If you ever had one of the above to play with you know why they are great to have.The development story so far:I managed to destroy several driver boards.The ones you find for cheap with 28 or40kHz transducers in your favourite online store.In the beginning I knew I will have a need to repair or replace these boards but no clue why.Take an ultrasonic cleaner and read the manual.There it is always pointed out that a low water level can destroy your toy.What does that exactly mean?The transducer needs to be kept in resonance, if the water level is too low or something havy sits right at the bottom of the tank the frequency drifts off too much.Very expensive untis can cope a bit better here, which gave me the idea for the universal driver.During my experiments with hoorns I noticed that it is very hard to get usable results without extensive computer simulations first.Just one mm too long or too short and literally nothing happens, go a bit further and a thin aluminium horn might start to crack under the stress.And in all these cases the driver overloads, in one cheap case to the point that the transducer fused together.Trying to examine these driver circuits while they operate turned out to be a total nightmare!Place the probe from the ocsilloscope literally anywhere and the thing goes out of tune already.By the way: Never coil up the wires going to your transducer.....Only way I found that somehow works is by adding a tiny transformer around the wire going to the transducer and to measure the voltage generated there.To make it short: Destructive testing provided the requirements a driver needs to match to keep the cost low.Reasons for the premature death of cheap driver boards:Almost all of these cheap drivers I could find generate the 28 or 40kHz signal from the mains voltage.Means it goes through a transformer to get the desired 50-80V and some witchcraft turns that into a more or less smooth DC voltage.This is then switched by some beefy transistors, mosfets or similar, depending on the circuit.The actual feedback happens with a tiny ring toroid, similar to what you use to drive a ZVS system.With this dirt simple design a fully tuned transducer - like when nothing is attached to it yet - would cause the driver to provide a voltage of about 6x of what the transducer is rated for.Thankfully in most cases the transducer survives this a couple of times while the transistors fry within about 3 seconds no matter how good the cooling.Slightly out of tune - like when mounted onto a cleaning tank - the resonant frequency is slightly off the tuned 28 or 40kHz.The driver compensates this through the tiny feedback transformer.But this only goes for a about 1-4kHz, drift away further and first the power drops, then the voltage spikes and it dies.The feedback is not able to shift the generated frequency enough as it is ultimately derived from the mains frequency of your grid.Reasons why a dedicated, low cost driver would open new possibilities:Imagine you need to make a horn or sonotrode for your transducer.Knowing that each half of it should be equal to a quarter wavelength of the operating frequency is nice and easy.But if you add something like a blade for cutting or you need some pressure for welding then calculated dimensions become useless.Programs to fully simulate complex sonotrode designs, especially if you need to add screws or blades are costly and out of reach for most of us.Even if you would have access you still need to know the material properties to know the speed of sound in the material and how much it can flex in various directions without being subjected to metal fatigue.For basically all hobby needs in terms of ultrasonic gadgets we are happy with a simple push pull motion.the same motion our transducer offers by default.And when it comes to attachments it turned out that quite stubby horns of light weight are a good compromise already.A 50-50 ratio of diameter and length works reasonably well in most cases.For example the standard 40kHz transducer of 45mm diameter is quite happy to work with a horn like this:45mm diameter on the thick end, 20mm diameter on the tin end.Thick part 40mm long, thin part 42mm long.The extra 2mm are for the manual tuning by filing or sanding it off until there is good cavitation happening when you put the end into water.This however is only good for simple testing purposes and some fun but as soon as you attach blades or a small pot with about 200grams of molten solder the tuning is way off and destroys the driver quickly.To be able to deal with different pressure levels on the working end or just a different mass that is attached the driver needs to "know" the new self resonant frequency.Basic idea for a dedicated driver:Please bare with me on this one as my developing days got severly neglected once I moved to the other side of the globe....Input should from a 12V power supply, preferably a PSU to keep costs and sourcing time low.The operating voltage for the transducer shall come from a simple switch mode supply.I was thinking of scrapping a PSU for the transformer and switching transistor.This however would provide about 120-160V on 240V mains with the transformer of a PSU.To match the required load changes it would be great to drive this first transformer by PWM means to regulate the output voltage with a potentiometer while keeping it steady within the set values.Basically like every cheap phone charger but with an output voltage that can be adjusted and kept regulated.The switching transistors for the transducer should be well over the required specs of an out of tune transducer.I guess capable of switching 600V should be sufficient.Main design change to the cheap driver boards would be the feedback.A hall effect sensor could provide the proportional voltage to the current going into the transducer.It would also provide the real operating frequency of the transducer for the feedback loop.The resulting real resonant frequency of the running system is then used to drive the switching transistors.As a result the transducer would always be driven at the exact right frequency no matter the load on the working end.These transducers still have a quite limited frequncy range due to the fixed counterweight on the back - it is optimised to be self resonant without the transducer being mounted.To explain this feature let me use a spring with a weight on it....You can move your hand up and down to make the weight swing up an down with the spring force.You can also push the weight to get the same effect.But if the weight would just expand and contract there would be no change in the spring force or position or the weight.Our transducer however is mounted to something and the weight on the back is heavier than what is on the front end of the transducer.As a result the weight is pushed back and forth and because all is fixed together this movement is transfered to for example your cleaning bowl.Without anything attached to the transducer it would literally start to rip itself apart until either the bolt or the ceramics fail.The feedback loop needs to prevent this by adjusting the switching voltage going to the transducer.Once too far out the system needs to shut off until it can reset.The frequency control is not that fragile.With the power controlled through the feedback even a wide drift in the operating frequency of about 5kHz would only reduce the effectiveness and amplitude of the moving horn/sonotrode.Sadly my skill set in circuits is not that good anymore to have the required parts in my head and to know how to combine them properly :(Why this concept is only really good for really basic applications:Professional solutions utlise often less than 20W of ultrasonic power for a soldering iron or scaler.For these devices the sonotrode/horn is spefically designed for the task at hand.Same goes for any possible attachments - without them these things don't do much at all.Finding these low power ceramic transducer rings for a good price is hard enough, making an amplifying horn even harder.But when using these quite big 50 or 100W transducers we find for cheap online we can compensate the lower amplitude with the added power of the transducer.Since we only need surface action but won't have to go through a few liters of liquid it might even be beneficial.Fun fact: A 40kHz transducer has the second harminc frequency at about 170kHz.Means we could design a driver for the second harmonic and enjoy total silence when working with it.Would also mean that the ultrasonic power would be much higher.Mass times acceleration and such things ;)If you want some ultrasonic cutter then you don't want to waste weeks and lots of money trying to come up with a working attachment to your transducer.Just keep it as short as possible and with about the same weight as the front part of the transducer.At least the driver desing would make it quite easy to design an amplifying horn by trail and error through reducing the lenght of the thin end until it really fits.Anyone with good circuit skills willing to volunteer? ;)

Topic by Downunder35m    |  last reply


List of Upcoming Contests (updated 9/2/20)

Hello everyone! Below is a list of the upcoming 2020 contests. Keep in mind that this list is subject to change and contests will continue to be added throughout the year. The contests below are in planning, and I've left off ones that we're still trying to decide on. The months indicate when the contests will be launching. Keep in mind that the list below is not set in stone. All contests and dates are subject to change!SeptemberBikes Challenge: All projects related to bikes. 14 SeptemberPumpkin Challenge: All projects related to pumpkins. Go traditional, or go way off the beaten path. September 14Halloween Contest: Our classic yearly contest, for all things Halloweeny! September 14Remix Contest: Remake and improve an existing project idea, whether your own or someone else's. September 14Mason Jar Speed Challenge: Use a mason jar in your project. September 14Potato Speed Challenge: Open to all things potato. September 28OctoberPaint Challenge: Include paint as an important part of your project. 12 OctoberHand Tools Only: Use only hand tools to make your project. 12 OctoberBattery Powered Contest: Create a project that is battery powered. 19 OctoberPlastic Contest: Make a project where plastic is an important element. Includes 3D printing. 19 OctoberModify It Speed Challenge: Take an existing thing and make it better. 12 October Candy Speed Challenge: Share your favorite candy recipes or recipes where a signficant ingredient is candy. 26 OctoberNovemberBlocks Coding Challenge: Use Tinkercad code blocks / circuits in your project. 9 November Cookies Challenge: Share your cookie recipes. 9 NovemberPlywood Speed Challenge: Build a project that uses plywood. 9 NovemberHoliday Decorations Speed Challenge: Share your holiday decoration projects. 23 NovemberWinter Catch-All Extravaganza: Winter projects of all types! 14 December *All contests and dates are subject to change. Please leave suggestions for prizes here. You can also leave suggestions about contests here. Have a contest question? Check the Contest FAQ!

Topic by randofo    |  last reply


what is this? identify my tool!? Answered

I had this for years, anybody got a clue what it is? most amusing answer gets a patch:-)

Question by crazyg    |  last reply


How to make Soul Gem and Staff Props from Skyrim?

I was planning on being a Skyrim Mage for Halloween this year and I wanted to make some soul gems and a staff, but I have no Idea on how to do so. Any ideas?

Question by spn_phoenix_92    |  last reply


How can convert a 12v power supply to 3v?

I am working on a laser spirograph project, I am using 12v dc fans on the inside but also want to power a 3v laser diode off the same source. Does anyone know how I can allow the full 12v to be used on the fans but drop down the voltage for the laser?

Question by ugman77    |  last reply


Why do people believe in free energy and how can we rid the internet of its fakeness?

Free energy is ultimately fake. While I do understand that making free energy videos earns the channels a lot of money, I am confused about why people believe it is real. They act as if they have a master's degree in free energy with their comments! As a 13-year-old, I still have a lot to learn, but this has baffled me.(For those free energy believers reading this, a few things. 1- humans have been incapable of producing a machine with 100% efficiency in any shape or form, and free energy generators are supposed to be >100% efficient. In addition, if that actually worked, it would be horrible, as it would collapse the entirety of our universe.)

Question by Cheesey125    |  last reply


Ever Repair a Electric Popcorn Kettle Before?

We have a popcorn machine at work.   The kettle died and I took it home to fix. I didn't know a ton about them before but after working on it it seems to mainly consist of a heating element, a thermostat and an in-line fuse. I replaced the fuse but each time I would turn the thing on it would cook one batch of popcorn (much faster than before and not as well) and then not be able to do another.  It seemed like the fuse was burning out.   I had replaced it with the same model number as before. So I replaced the thermostat too.   Still, the same thing happens.   I tried reversing the poles in case I put the wires back in backwards and didn't realize it, in case that mattered, but no effect. I adjusted the thermostat, both old and new turning them down and down by what should be 200 degrees in the end but was getting the same effect, like the thermostat wasn't the issue. Does anybody have any ideas what is going on here?   Is there maybe some inline resistor in the heating element I'll never be able to get to or see or something? Adding a picture.   The two white wires are power, the green is a ground.  There's nothing but wire beyond where they go.

Topic by technicallyartistic    |  last reply


Why has nobody found a way to power a vehicle using magnetic energy? Answered

It seems like such a simple solution, yet nobody has attempted it yet. Why? The force put off by magnets is basically free energy, right?

Question by annchanted    |  last reply


Help! Thermo Electric Generator

Just wondering if any of you knowledgable folk can help me out. Of late I have experimenting with solar cells and energy production. I have been calculating some interesting results, many of which due to the use of lenses, magnification and mirrors etc. Alas this has led to more that on fried solar cell due to the temperatures im dealing with. Is there any practical way to obtain/construct a Thermo electric generator as pictured? I have spent some time with my friend Google, leaving me with little more than the notion that perhaps this technology is out of reach of the home experimentor. Think giant light cannon that can melt pennies. How can I harness this heat directly as apposed to, going the boiler/steam powered engine method?

Topic by Lftndbt    |  last reply


knex armour

I made some im almost done the body is 90% bullet proof ( to my guns )

Topic by funwithfire325    |  last reply


how to make a signal jammer???

Simply,easily,for project,what are the things to need,what are the problems in that,plz reply guys am college student...

Question by vairavel    |  last reply


how do you make homemade air rifle pellets .177"(4.5mm) .22"(5.5mm)?

I have been searching websites for ages looking to see if their are any ads for presses/dies/moulds/punches so i can make my own air rifle pellets....with no luck at all....any/all hlp will be very much appreciated....rich40

Question by rich40    |  last reply


RC car batteries 7.2v to higher voltage?

Hi, its me again and i was wondering if you guys could help me. Well i just got this (http://www.nitrorcx.com/brushless-monster-truck.html) electric off road truck and this monster is insanely fast. But i want a bigger battery. In the instructions, it says the trucks input is 7.2 volts up to 16 volts. But thats the problem, my dad and I are skeptical about putting a battery over 7.2 volts in there. I am hoping to get an 8.4 volt battery (http://www.rcsuperstore.com/ProductDetails.asp?ProductCode=VEN15277T&click;=2) like this 7 cell one but am still skeptical about even this 1.2 volt jump. Can anybody tell me if anything  will fry, or be perfectly fine.

Question by Thelonelysandwitch    |  last reply


How can I make my own scat mat?

I foster rescue cats, and have successfully trained them all to keep off of counters and shelves, until this recent batch. I can't afford the $60 and up it costs for these mats, but voice commands and squirt bottles just aren't cutting it as deterrents.

Question by AlisonM    |  last reply


Naruto Fans!

Naruto is the BEST anime! Any people who wamt to talk about Naruto Chat here!

Topic by Anime Otaku JG    |  last reply


What are these tools?

I have these three tools and I need help.The Ace of Spade tool is a machinist tool, maybe to use on a lathe and is made by "La Société genevoise d'instruments de physique" (SIP). But what is its use and name?The Two of Spade are screw extractors apparently, but they have this extra part in the middle. How do you use them?Then the Three of Spade is a chuck I guess. Comes from a machinist tool box. How do you call it?I know that is a lot, but I appreciate any help.Thanks!

Question by juanguardiaros    |  last reply


Tattoo yourself with a pin and pigmented acrylic ink? Answered

I am wondering if you can tattoo yourself with a sterilized sewing pin and pigmented acrylic dip pen ink. Is the ink ok for tattoos? How for does the needle need to go?

Question by josh1324    |  last reply


How Instructables Hooked Me Up

Has posting a project on Instructables and being a member of our community helped you nail an interview / get your dream job / propose to your partner /  get an A on a school project / muster up the courage to ask someone out?? We want to hear your stories! Please share them below

Topic by kazmataz    |  last reply



How do I build the combination part of a lego safe? Answered

My friend and I are building combination safes out of lego and he doesn't know how to make the combination device, Do any of you have suggestions? If you know a url of a youtube video that demonstrates the combination device well please post a link in the answers. 

Question by venom1539    |  last reply


I bought a “Likesuns” electric indoor LED light

I bought a “Likesuns” electric indoor LED light to grow my plants that require it. I had no idea it was a light that requires a better knowledge of electronics than I have - it was not in the advertisement. I’ve attached a copy of the verbiage in the manual. I don’t know what it means, but assume I really need an electrician. I live in a small apt. for seniors. I won’t use it longer than 6 hrs per day. I plan to plug the unit in to a grounded plug in my bathroom (Light will be hung OUTSIDE of bathroom.) Can you or any of your electrical hosts tel me if this is actually something I CAN do (sort of) on my own, honestly, or will I really need an electrician. Not sure who I can get, but I already have the light. Thank you so much for your help. MarySRS

Question by MarySRS    |  last reply


Help to Dismantle a bench Vice

Hi I have a bench vice which I am trying to dismantle. I am having trouble getting it apart, when fully wound out it stops, I think because there is a pin visible from the back which turns with the thread. Would this prevent the thread coming right out? There is also a spring visible from the handle end, hopefully this information may help someone identify the type of vice I am dealing with. The problem with the vice is that it is very hard to turn the handle, I hope someone will know why it is stiff to turn and the possible cause and fix for the problem.Thanks, Peter

Question by PeterC30    |  last reply


From Anime to Reality

Someone was such a fan of Akira that they recreated Kaneda's bike from the manga and the movie. The bike is actually street legal and I'm looking forward to reports of it tearing it up in Neo Tokyo in vicious street gang battles. Extra bonus points if it manages to create light trails. Link

Topic by fungus amungus    |  last reply


How to remove a fireplace?

We bought this house 5 years ago, and this fireplace has been there since the construction of the house in 1990. Fireplace is massive and in an angle that is weird in the house, which is not a big house. We use it maybe 3-4 times a year in winter, as it doesn't really heat the whole house. I wish I could just remove it and condemn it, but I'm not sure how?

Question by jennblafleur    |  last reply


Can LED's in Gemmy Kaleidoscope Light be replaced?

I'm trying to re-purpose a Gemmy Kaleidoscope Green LED light bought last year for outdoor christmas lighting. Is it possible to replace a couple of the LED's in it and make it a multi-color unit (RGB) instead? Here's what the innards looks like. Not sure where I can get the LED part numbers to look them up. Thanks for any help.

Question by joe_renaud    |  last reply


Praying Mantis Dying? HELP!

I have what I believe is a large Indian Mantis.  I fould it on our deck and have kept it for about 3 weeks so far.  It molted a week ago and for the first time I saw wings.  The covering of the wings is a little shredded, but look ok.  Starting yesterday it started looking very lethargic and was hanging by 1 leg from the top screen of it's cage where it hasn't left in 3 weeks except when it molted.  It looks like it is dying and not showing any signs of strength or interest in food.  What can I do, if anything?  Temps here in New England are in the 30's at night and I don't think it would stand a chance if I let it go or I would. PLEASE ADVISE ASAP.  THANKS!

Question    |  last reply


sodium pyrosulfite/Bonide stump out

Well today I went to the home depot planning on picking up some grants stump remover, they were all out and the only other similar item was bonide stump out, it didn't have an ingredient list, and really wasn't comfortable asking the sales guy if this stump remover had explosives in it. (Especially since im 15.) so i bought it came home and did some research. So this crap has no potassium nitrate, but i found its 98% sodium pyrosulfite, now the name has the word PYRO in it so I'm hoping someone out their knows something I can do with it, right now all i have figured out is when it comes in contact with water it makes sodium dioxide, which is really smelly gas, so I have an idea for an impact stink bomb, any other ideas.

Topic by arch_angel07    |  last reply


Why hasn't the steam engine been reborn for modern cars?

With present gas/pollution concerns and green tech merging with cars left and right... Why hasn't the steam engine been reborn? I mean what takes MORE power, Electricity to move a 1000lb car or heat up a heating element to heat water and make steam? With tanks strong enough to hold Hydrogen for cars why cant the same tech be used for a steam engine? All the fuel you would need would be water (solar panels/batteries to power heating) but just water for fuel. Thoughts?

Question by Green_Primus    |  last reply


Microwave friendly plastic bag or glue ?

I am making a heat pack. Take sand or clay or similar material, wrap it up in a microwave friendly plastic and glue the plastic to seal everything up. Pretty simple. Which glues can be used ? regular super glue ? aral dite (indian equivalent is fevitite) . White glue (fevicol) ? Any other.Similarly which plastic bags would be suitable ? Would a thickish plastic sheet from the stationary a good idea ?

Question by jugaadDo    |  last reply


I tore the plastic cover stuff off my binder, how can i fix it?

So I got really mad and tore it off and I wanna fix it to make it look cool for school, so how can I?

Question by Cupcakes4lif    |  last reply


Pure cacsaicin from chilli peppers

I already had a quite long Ible in the making when it downed on me that not too many people should actually create such a dangerous substance at home.So instead I decided to just write a bit about the history, general procedures and what is possible or not.If you already made your own chilli exptract for a special hot sauce or your home made pepper spray then you feel right at home.Those who never done anything like it or at least some essential oil extractions might just find some other interesting stuff to read.I won't go into all details here as those with the basic knowledge will already know the precautions and most things.Capsaicin...The stuff that makes your exes run, clear you nose and makes you sweat like you on fire.At least if it comes within you favourite dish.In the pure form it is a severe irritant and should be handled like explosives or concentrated acids.You just won't make a mistake with this stuff twice - trust me!What really harms you is not the capsaicin itself, it is your bodies reaction to it!It stimulates the same nerves responsible to feel heat and pain, sometimes those for a severe itch as well.And unlike a normal reaction you would get from hot water, it won't stop until it is fully removed.Even after this the body keeps reacting for bit longer.On the skin you can end up with blisters like from a real burn, in your airways it can make breathing impossible!And lets just say that swimming goggles won't look as dumb and funny on your face once you realise you got some fine crystals on your face....If you dare to continue then I assume you are well aware of the risks, dangers and PPE requirements!Pure or extract?I checked tons of so called instructions on how to make pure or 99% pure capsaicin from chilli peppers.They all just produce a really crude mix of goo that happens to have a lot of capsaicin in it.If it is red or even darker it is nowhere near pure.If it has a weird smell that has really nothing in common with chilli than it is even worse.If it is more or less colorless, with a very strong scent that your nose does not like at all then we are getting somewhere.So why is it that we always end up with this color that is impossible to remove?Extracting chilli peppers....A thing most people ignore a bit when in a hurry is that an alcohol extraction requires DRY alcohol.You just won't tolerate water in it, which is why often methanol comes easier and cheaper than ethanol.Some people even think just because the alcohol is either evaporated or distilled off that all is good when using things like methylated spirit.Ever had the problem that you used that stuff and your hot sauce made you vomit after realising that it comes with a bad and extremely bitter after taste?That is the stuff that makes your home depot ethanol unuasable ;)If you use homegrown or otherwise fresh chilli you need to fully dry it first!Don't be fooled by people stating they did it with fresh peppers.What you get this way is some of the worst extractions you can get.Don't be fooled to think you need some Carolina Reaper either.A big bag of chilli powder from your grocery store will do just fine.So what is all in our extract?Alcohol or any other solvent usable for a capsaicin extraction also dissolves a lot of other things.Like the beta carotenes that give the extract the organge to red color.The skin and the entire fruit also contains oils, plus the shiny outside is mostly due to wax...All of this ends in your extract....You not only get what you want and might not mind but also everything else you don't want.Making the difference....The impossible we do right away, for miricles or wonder allow a day or two of processing ;)Assuming you end with a rather large qauntity of alcohol the concentration of everything is relatively low.If you used something like a Soxhlet extraction you already degraded a lot of the capsaicin due to the heat.And even after the best filtering you might have a clear solution but whatever is not a solid is still in there.Imagine you would put it all into a freezer....Surprisingly a lot of stuff won't stay in solution once cooled down enough.Especially if you give it a few days.Depending on what you started with you either get a slimy looking sludge or some crystals showing.Either way it needs to be filtered out and washed.For the washing use the same pure alcohol as before but make sure it is well cooled.If any cacsaicin was already forming crystals then they will be washed into your solution again now to a little extend.But you removed an awful lot of the wax if it was not capsaicin already. ;)Testing the slurry we collected.When using chilli powder from the shops I noticed that there is often no wax to be found at all.While for fresh produce the content is significant.Once dry you make a simple test with water.Capsaicin basically does not dissolve in water, so it would sink to the bottom while wax floats ;)I assume you ended with little to no wax but fine capsaicin instead.From the natural form it is very hard to get crystals bigger than a dust particle.This only happens if the temperature is cold enough and the concentration high enough.As my entire setup is quite small I usually prepare several 500ml plastic bottles that I fill to one quarter by height with chilli powder and then fill up to half with methanol.In the end I use a full 1kg bad of chilli powder but only a may of 5 to ten bottles.Making the most of it.When using alcohol extraction you want to use a little of the solvent as possible.Use means here wasting it instead of recycling it.Once I filtered my white slurry out I destill the remaining solution to reduce it by 50-75%.An almost dark red color is usually when it is time to stop.After this I place it back in the freezer for a day to check if more crystals or slurry forms.If so then I filter it off again.What is left is then mixed with recycled and fresh methanol to soak more chilli powder in my bottles.Means I discard the filtered of chilli poweder once washed, recycle what I can from the methanol and keep whatever the slurry produces that is not wax or dissolves in water.Depending with how much chilli you start you will get to the point where your filtered solution is already dark red.Since the final capsaicin won't dissolve in water you can destill with some added (destilled) water.This way you recover the alcohol without risking to get a sticky goo everyhwere that you need to clean off.It is quite possible to get some more capsaicin this way as with the alcohol leaving it will participate out.Simply filter the solution once the alcohol is recovered.As the beta carotenes won't dissolve well in water either it is best to perfom this destillation while all is mixed.If you can't do this then don't worry to much, it just means a few more minutes of cleaning later ;)Testing the final product....What you have left once the slurry is dried should be almost colorless with maybe a pale yellow in it.Fully dried it should appear as basically white.There should be no smell to it, nothing to tickkle you nose.Colorless and odorless.For whatever reason I still sometimes end up with a very faint smell.Not really chilli though...Depending on the temperature the products is either quite hard to almost britlle (when frozen) to almost wax like at room temp and above.I highly recommend against testing whatever you have on your skin or to ingest it!!!Waste some sauce base like ketchup (you can add it later to your sauce again) or some butter - I prefer the later.Butter become liquid well below the 65°C celsius decomposition temp for capsaicin, so it should dissolve very easy in it.Take a shot glass with just enough butter for a sandwich and dip a toothpick into your product.Make sure there it a tiny bit on it and not that the toothpick has a thick coating!Once cooled down while mixing every now then spread it on some sandwich and take a bite.After a minute or two you should definitately feel a difference to just butter - hopefully not too hot.If nothing happens repeat with a bit more on the toothpick.Still nothing at all usually means you filtered out only by-products and for some reasons managed to make the capsaicin disappear.Hints and tips that might safe your bacon....Methanol boils at about 64°C, ethanol at about 77°C.Capsaicin starts to decompose at 65°C.Not a big deal but if you get to the 80° mark, which is easy which ethanol you might have to use evaporation instead of destillation and waste the alcohol to your surrounding air...Water...For the final product it is not a problem but during the extraction process it is.Despite some people claiming otherwise both the quality and amount of what you end up with are lower.It seems some of the capsaicin binds to the water molecules with the help of some other stuff that the plant material provides.And when you try to destill a solution that was contaminated with water from the chilli it tends to foam up quite badly.While with pure alcohol and fully dried product there is no foaming.What to expect when collecting the end product...At room temperature you can dissolve what you get in product from one kg of dried chilli powder in under 10ml of pure alcohol.However at -20°C next to nothing dissolves in the alcohol.That means as long as you have still over lets say 1000ml alcohol extract then very little will participate out.Just one reason why I prefer to work with small batches - keeps the concentration higher from the start.The more you destill off and re-use the higher the capsaicin concentration in the alcohol will be.So before you start to add any water for the destillation you need to be aware of the consequences.I found out that first destilling most of the alcohol off the single rounds that got too dark in color helps.I just collect this conentrate for the final destillation process.Key is to destill this off to the point where it just starts to thicken up a bit.It should still be liquid but act almost like a thin oil.You don't want it so thick that is crates a coating on the walls when you move the liquid around.In case it did happen just add a tiny amount of alcohol again.Put in the freezer for a few days....Empty into your filter and let as much as possible drip out.Rinse with as little alcohol as possible - have the rinsing alcohol at -20C as well .Do not wash the filter with water but with the frozen cold rinsing alcohol.Cover the filter up and leave in a cool place for the next run - have something under it as it might still let a drip or two off.The remaining liquid leave to evaporate off until it just starts to thick up again a tiny bit - back in the freezer for a day or two.Filter out again then while still a bit wet turn the filter over to remove most what is in it.I prefer to empty onto a teflon sheet and to wear full PPE here....While still wet you try to remove more from the filter with a fine but short brush, knife or whatever you find suitable.Do not continue any action once the stuff starts to dry!Place the filter into a sealed bag and leave in your freezer for when you do anthoer extraction - this way you loose far less product ;)When doing a final destillation with added water to cover all the alcohol you are left with the remains of the original product, minus all solids.Beta carotene is quite beneficial, so it would make sense to include it into your hot sauce.Plus there will always be some leftover capsaicin in it.If you want to use this part of the extract as well to really get what is possible then IMHO slow is better.You can't just destill off or boil off the water to get a nice "sauce" base.The capsaicin that is left would be mostly decomposed and with no effect anymore.A clear sign of too much temperature is bad smell that really turns you off.Hard to define in words but trust me, if you smell it you know what I means as you woul refuse to have this smell coming from your final hotsauce.During the summer it no problem to just leave it out to evaporate in the shade !You can do it in full sun but must make sure no sunlight gets into the liquid.UV decomposes at least a lot of the karotenes....Special equippment at hand? If you happen to have a vacuum pump or at least a salvaged fridge compressor you can safe a lot of time.A buchner filter for 500ml in the top is quite cheap but you can build something similar with a normal funnel.Look it up it you want...A proper buchner filter however already comes with a very fine glass filter built in.Means you don't really need any filter paper - I still add it as it makes the cleaning easier.Instead of waiting several hours for gravity to do its work on a coffe filter you are done in a few minutes.Well worth trying out!For the water destillation of the remaining end product, or by-product if you like, vacuum also helps.CVD or Closed Vacuum Destillation sound complicated but is really simple.One pressure vessel is filled with the solution to be conectrated, the other is kept empty.Connected with a suitable pipe or hose and fully sealed.The extract is heated to about 40°C while the empty vessel is placed into an ice bath.With the pump and the help of a valve create just enough vacuum so create small bubbles in the heated vessel.Close the valve and a few hours later there should be far less water in the hot one while the frozen one builds up ice.Every now and then check the vacuum gauge and if require start the pump again.You can do with just the pump and one vessel....Problem is that the oil in your pump will quickly get far too contaminated with water.You could add a conatainer with something like an absorbent but it would have to be sufficient for all the water you need to remove.Most of all it must be able to absorb it fully before the airstream enters the compressor.The benefit is that the capsaicin can't decompose at all.In a vacuum or close to it anyways, a lot of the things that procude smell also disappear through the compressor.Won't help it was already a stinky mess but will certainly reduce the smell of the concentrate.If you prefer to keep this aroma for your final sauce then do not use a vacuum.Why not a Soxhlet or similar device as used for essential oil extraction?The benefit seems to be clear:You have a relatively large vessel to hold a lot of chille powder and can let the alcohol cycle and wash it out completly...Theory is not always reality.....Firstly the alcohol runs through it many times while it dissolves what it can from the powder.That means each round you actually wash with a higher concentration until there is equal amounts in the alcohol and the powder.You waste about 50% of the end product unless you repeat it all several times with fresh alcohol.Worst of all however is the temperature, even if you use methanol.To make the alcohol evaporate enough to make the process work properly and in a timely fashion it must be heated to above 65°C, in most cases even with a proper heating mantle you won't have the temperature control tight enough.It is quite possible to destroy 70% of the capsaicin this way....The condesers used are also not really suitable for these low temperatures.Means you should use ice water to cool.Either way you will loose a lot of what could otherwise be product.Funny things that might stumble you along the way.In the freezer the solution will participate out a bit.However, when back to room temperature most if it will still be there, only a fraction goes back into solution.I could not figure out why this happens but once heated to about 40°C it all dissolves again.Filter fully blocked by the product?The fine sludge can be a problem even with a proper vacuum filtration unit.Especially if the product is still not really a solid once fully dried.A paper filter can be re-used many times but whatever makes it past and into the glass filter is tricky.You should not get much here if the paper filter was fine enough but if it builds up to the point where it makes the filtration long and slow:Remove the paper filter and add a small amount of luke warm alcohol.If it does not start to trickle through already give it a minute or two before turning the vacuum on.Starts a bit slow but should clear up quickly, if in doub repaet with a large volume of alcohol.I prefer to do this cleaning before I start a new bag of powder or whever I need to restock.Means I can use the same alcohol I had to clean the filter to add to the bottles with powder ;)Nothing gets wasted if you are prepared....If you find any typos in the above then feel free to keep them.However if you decide to use the typos for monetary gain I would kindly ask for 5% of the net profit made from my typos.;)

Topic by Downunder35m    |  last reply


Is the K'NEX gun building community dead in 2020?

Today I logged onto Instructables for the first time in three long years. Damn, the nostalgia hit me HARD. I remember when the K'NEX gun community was still active. Man, those were the days. Waking up to start building on a new gun was the highlight of my day. I would build literally every gun I could find. Knex Lego Maniac, Killer~SafeCracker, dr. richtofen, The Red Book of Westmarch... those were the big names. They made quality guns all the time. Whatever happened to this community? Why did it have to fall apart??If anyone from the OG K'NEX gun community is still around and sees this, please go ahead and send me a message. I miss this stuff so much you don't even know.

Question by The Knex Inventor    |  last reply


Hulu App For Iphone!

Big news for the iPhone and iPod touch owners! Hulu is finally developing an app for the iPhone.From cNet news...Silicon Alley Insider is reporting that a dedicated Hulu application is indeed on its way to the iPhone and should be here in just a few months.SAI says the application will work over Wi-Fi and AT&T;'s 3G network, meaning that users will be able to view programming anywhere with a fast data connection.Rumors suggesting that an iPhone-friendly version of Hulu swirled around this time last year, however, they predated the launch of the App Store, and Hulu flat-out denied that one was being worked on.This time around, though, it's far more plausible, with the upcoming iPhone OS 3.0 software update, which lets developers bake streaming media into their applications. For Hulu, this means that the advertising could be stuck into the mobile stream and that users would be able to watch videos without leaving the application.One of the things that keep this rumor from holding water is that Hulu is in direct competition with Apple's iTunes business. Users of Hulu can watch ad-supported, full-length television shows and movies on their personal computers for free, instead of paying Apple to download a copy for offline viewing.If such an app were available on the iPhone, it would also offer portable TV and movie watching, something not yet offered in Apple's own mobile iTunes app, which is limited to video podcasts. In past instances of this, the company has simply denied applications such as Podcaster from making it through the app approval process, only to launch it as a first party feature later on.On the other hand, some of Hulu's competitors have already gotten a foot in the door, including Joost and CBS-owned TV.com, which has its own iPhone application that streams in content in chunks. In addition, Google's YouTube, whose application comes preinstalled on the iPhone, has recently reached an agreement with major studios, including Sony Pictures, Lions Gate Entertainment, and CBS (publisher of CNET News), to offer visitors full-length TV shows and feature films.If Hulu can't manage to pull off getting advertisements in the stream, using this system, it would be fairly simple to force users to sit through advertisements between clips.Link.

Topic by Gjdj3    |  last reply


How can I add a DC 12V 10A Relay 1CH Wireless RF Remote Control Switch to my young grandsons hoverboard go kart?

Hi, just bought my young grandson a hoverboard and kart attachment. Trouble is these things go at quite a speed, for safety sake I would like to add the above device in case he heads for a wall 😱 How can I do it? all replies are appreciated. 👍

Question by TN1946    |  last reply