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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 the Instructables Teachers Hub!

Welcome to the new home for all things Teacher related on Instructables. We hope you'll explore the new features and come back often to find and share projects, inspiration, and classroom resources. As you explore the new Teachers Hub, you'll see it's easy to find projects by subject or grade level and sort them to find all the best and freshest projects.Be sure to spend some time in the new Teacher Forum. It's a great place to connect with fellow teachers and make new friends! You could start by introducing yourself here or finding a topic that interests you and join the conversation there. :)We'll be working to continuously update and support your needs in this new area of the Instructables community, so thank you in advance for your valued feedback and suggestions.

Topic by WeTeachThemSTEM    |  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


Help... PCF8574T (Expanding "Nano's" Digital Outputs)

- When I saw my RGB Chromatograph clock my teacher built from a kit  I was so impressed with it I  jumped the gun & ordered the parts so I could make one with an arduino version, I never thought much about it, thats so simple I could do in a few hours no problem except I overlooked one simple thing.... This clock uses six 10mm RGB Leds, two for the hour, two for the minutes & two for the seconds, each led has 3 inputs & 1 ground, thats a total of 18 outputs,  thats not including a few other inputs used for status indicators, along with a few inputs for buttons, the problem is that a Nano doesnt have enough digital outputs & I completely overlooked that fact. Anyways I started looking for I/O expanders when I realized that I have a few 1602 displays & PCF8574T backpacks, I have heard some people claim that it can be used to provide an additional 16 digital outputs, if true then it that would resolve my issue very easy Has anyone done this? or example sketch how I could deploy the PCF8574 this way, for example a blink sketch that defines a pin on the PCF8574 as an outputs & turns on a LED connected to the pin Thank you much...

Question by rdlockrey    |  last reply


Why a "shadow" effect on an LCD monitor? Answered

I have two Acer 24" LCD monitors for my laptop, one at home and one at the office.  The office monitor sometimes shows a dark 'shadow' effect to the right of both text and graphics.  The home monitor is fine so it can't be the computer.  Any ideas as to what's causing it, and whether it can be fixed?

Question by Prfesser    |  last reply


Using a 74141/7441 or KM115

I'm having much difficulty understanding 74141/KD115 chips. Do I supply the Vcc and GND pins with the 140 volts I'm using to drive the nixies? I'm guessing that each output of the 74141 would go to each of the nixies anodes, but do not know this for sure. A quick tutorial or explanation would be much appreciated. Thanks, -B.

Topic by B_A_M    |  last reply


Suggestion for Instructables.

I often do some upcycle/recycle job as hobbie, every time i found a junk comes a wish to do something with it, i often search from instructable for ideas, it would be really helpful if you add a new TAG function to each recycling project of "what are the materiales beijng reused or recycled", then a new function would apears like "make / build something with......".hope this helps for your development. excellent site, i love all you guys have done so far!

Topic by TqW    |  last reply


GMO sun flower seeds, how can I tell? Answered

Hi fellow instrucablers, I planted some sunflowers a while ago and recently I collected the seeds from the flowers and replanted them.  The original seeds were from a packet which I threw away.  I've planted the new seeds and it's been a week and the haven't sprouted, I'm not sure if I was really unlucky or if the seeds have been genetically modified in order for them not to grow new plants.   I still have some seeds left over so I was wondering if there was anyway to tell if they have been modified somehow. Thanks a ton Sirnoodlehe

Question by SirNoodlehe    |  last reply


I want to make my kitty-seat-toilet-thing have a rough texture...

Hello!I will be getting a kitten sometime soon, and I want to train the kitty to use the toilet (because that'd be GREAT!!). I would like to put a sandpaper like texture on it so there is something to scratch ;) , but I can't find anything about putting a sandpaper like texture out there! And I would cut out a path to the bowl...Don't know why there isn't one... HELP!! :)

Question by droctogon187    |  last reply


Help me find the right app plz

Hi. Lockdown has us all scraping the bottom of the barrel to stay busy. While cleaning a co rentor's storage, found a busted up drone. Quadcopter with wifi cam. Want to reuse the camera. Got the wiring right, but cant find the right app to view. No model number anywhere. The name only says "NAVIGATOR QUADCOPTER" nothing else. Please help anybody

Topic by celticphoenix69  


Help bulding a garage port for automover

This summer I will rebuild the front of my house.and i got the idea that my Husqvarna 220 will also have its own garage. With a real garage door.But do not know how to solve it properly, I can set the mower to run on specific time and days, so that the door opens 1min before will start and close 3 min later. All god for now. i will using a smart plug to control the power the port. now to the problemif the mover need to recharge the port will be closet, how and what can i bulid so it can detect the mover geting close to the port and opens? and close when its recharinga + is i can control the port using Home assistent to just open and close. Regard

Question by berntsson88  


Make a bluetooth camera out of web cam

I have a small webcam can I somehow use it to make Bluetooth Camera i.e transmits whatever it sees live over Bluetooth....

Question by pritishs4  


how do build an atomizer nozzle?

We were wondering how to build a heatresistant atomizer, it doesn't have to be fancy or anything?

Question by keijemosch    |  last reply


My 555 IC overheats

I am trying to construct astable multivibrator using 555 IC that will drive my relay. I am trying to make it trigger every 15 min. but when ever it triggers, the 555 IC get overheated, I have burnt almost 10 of them. any idea what could be the reason? If I don't connect anything to pin-3, it works very well.

Question by dgogate07    |  last reply


Looking for instructable for building a cartoon box

Hi, I have a lot of pieces of something (laptop hard-drive), so I want to orgnize them in a box, with separators and so on.I have a box of cereal with the appropriate size, but this box is thin.So I thoutgh to add a cartoon panels, but I don't know what to do with the panel's corners, how to connect the corners each other?

Question by baruchiro  


How to Implement Facebook Social Login

Good afternoon,I have been trying to use "login with facebook" on my website for 15 days. I have been using the code published by Facebook, at the link https://developers.facebook.com/docs/facebook-log... web / v2.2. My problem with this code is that I want the customer after login with his facebook (through the window that pop out) to be redirected to a specific page on my website, but what happens is that after the customer does login with your facebook, the client is redirected to the same page that asks him to login.I have already followed the steps that are explained in the link that I mentioned earlier. Could someone help me? Thanks

Question by pp8380    |  last reply


Where can I get free rubber bands?

They have to be out there somewhere... They're lurking in the shadows... They're watching me... I know there has to be some way to get free rubber bands and I would love some help finding them. Thank you! =-]

Question by travw    |  last reply


Knex Games

Does any body have any ideas for any knex carnival style games?

Topic by Nothing2it    |  last reply


Gaming in school

Does anyone know of games websites/ links that are not blocked by a schools filtration system? I get so damn bored in ICT lessons

Topic by ti112    |  last reply


What is this tool for?

Can anyone tell me what this tool is for?   I came across it all rusted and thought it was some type of pliers or cutter. After I cleaned it up I could tell it was probably neither. What I thought was a plier jaw is actually one piece and does not close and what i thought maybe the cutting blade, actually had lines and numbers, like a ruler. The one small screw that the spring is attached to, will allow you to adjust how far the jaw/cutter will close and the other screw, when loosened a bit allows you to slide the little metal 'arm' in or out, like a measuring template. It has some fancy designs on the handles as you can see and the only marking says "Made in Western Germany".

Question by millsy22    |  last reply


List of Upcoming Contests (updated 2/24/20)

Hello everyone! Below is a partial list of the 2020 contest calendar. Keep in mind that this list is subject to change and contests will continue to be added throughout the year. The contests below are already 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. All contests will launch near the beginning of each month. Keep in mind that the list below is not set in stone. All contests and dates are subject to change!MarchSpring Cleaning Challenge 2-MarPCB Design Challenge 2-MarWoodworking Contest 2-MarClock Contest Rubber 2-MarBand Speed Challenge 2-MarTiny Speed Challenge 16-MarSculpting Challenge 30-MarIndoor Plants Challenge 30-Mar3D Printed Contest 30-MarMotor Vehicles Contest 30-MarLED Strip Speed Challenge 30-MarAprilEpoxy Speed Challenge 13-AprLeather Challenge 27-AprSpace Challenge 27-AprArduino Contest 27-AprFirst Time Author Contest 27-AprScraps Speed Challenge 27-Apr *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


How do you fix a sewing machine that won't stop running?

I have a great old sewing machine and it would work fine if i could control the needle with the presser foot. It is a Zig Zag model E-388 Precision Made in Japan.

Question by Yobetty    |  last reply


Designing a Device to Moderate Vape Use - Help!

Hi! Switching from smoking cigarettes, I have encountered an unfortunate downside of vaping that I keep constantly hitting my vape. I thought of applying my electronics skills to solve it and hopefully eventually quit vaping. Idea is to limit the number of times I can vape through the device. I have some understanding on how to design a brand new vape f.e. that would let's say limit the use like "14pufs/6 times a day = 6 "cigarettes" and you could program the microcontroller to shut down the batter after you pressed the button 14 times let's say.However, is there a way to modify existing vapes so that if I plug a small device in the USB port of the vape, it would shut down the vape after 14 puffs (~1 cigarette) for some time? Would this be a "vape-specific" device since each has its own microcontroller with its own program or could I make something that plugs into any vape and you can control consumption? On this second point, I really don't know where to start. Anyone has any ideas to work around this problem or is this completely not feasible?

Topic by dunnonametochoose    |  last reply


Is a Wooden Enclosure for Electronics a Good Idea? Answered

I am in the process of converting my ATX power supply into a bench power supply. My PSU's standard case is made from 1mm steel with various ventilation holes, there is also a 120*120mm fan.  However, the circuit board is strangely positioned within the case and there isn't enough space for what I want to add.   I would like to take all of the electronics and rehouse them in a home-made wooden case. My question is; Is this a sensible thing to do? I plan to use 5mm pine stripwood to remake the box, but slightly bigger and better arranged. I would still fit the fan and drill plenty of ventilation holes.  Do I need to take any extra precautions if using wood, or is it just a really bad idea. Thanks in advance. 

Question by R055_28    |  last reply


What is this tool? Answered

Can anyone tell me what this tool is?

Question by adriangenereux    |  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


I have built the Valve Caster circuit. I am having a horrible fuzz coming from my speakers. How can I fix this?

This is a question that adds on to a previous discussion that involved a custom tube circuit using a 12AU7 tube.  I have gotten the Valve Caster to have output sound. signal goes from the guitar to the Valve to the preamp then to the amp. The amplifier did not have the fuzz until the Valve was put in. now I have a fuzz that sounds similar to that of rushing water. how can I fix this? I was contemplating putting the Huminator circuit in to correct this but I didn't know if that would work for this. the amp layout that I have here is roughly the same layout as it is in in reality

Question by fastcar123    |  last reply


PC Power Supply To Power CB Radio?

I have a cb radio my uncle gave me 12v 2-4 amps.. I have an old computer with a power supply with lines for 12v 6amps and 12v 8amps. is there anyway I can get this to power my cb radio without blowing the thing? EDIT I forgot to mention, this is a mobile cb radio, I'm trying to run it in the house, which is why I wan't to use a pc power supply to run it....

Topic by acer5050    |  last reply


K'nex Gear Ratios

What Ratios Do the K'nex Gears Produce? I have noticed there have been a lot of questions about gears for k'nex models and in particular, engines but there have been no documents or information on what the different gear combinations actually convert the input speed to. On the document attached there are the worked out combinations and what the speed produced is, but you will notice that the combinations only go up to three gears; this is because if you have only three different gears, you will have to repeat atleast one gear therefore the ratio would be able to be created using less gears as intended.  The new file has now been uploaded. I hope this helps. MattJoeP

Topic by Knexperiment    |  last reply


Is a CRT electron gun any use?

Is it worth it to take the electron gun out of a CRT when salvaging parts? I've seen people remove the electron gun when they take apart the CRT but I don't know what they'd use it for. What can you do with a CRT electron gun? What chemicals does the gun contain? (I know the screen has toxic phosphor and stuff but I'm talking about the gun itself). Also, is it safe to vent a CRT tube? I have found that you should vent the CRT tube before working on it, by smashing the end from a distance, so that it won't implode if you happen to break it when working on it. But is it safe to puncture open the tube? There are toxic phosphors inside and I worry that venting it could cause toxic chemicals to go airborne.

Question by poiihy    |  last reply


HELP - Calculating base resistor value when using a transistor to control a relay

Hi, it is a very long time since I have done anything like this so bear with me.I want to make a simple circuit using a transistor to control a relay. I think a BC547 NPN transistor will do the job. I would like someone to confirm my logic or point out where I have gone wrong.The variables are given below.Vcc - 12VRc - resistance of the coil on the relay - 362 ohmsVin - 3V - to cause the transistor to saturate and then switch the relay onI will use a diode to protect the transistor when the relay switches off.I calculate Ic to be 33mA (12V/362ohms).Using a gain of 400 I have calculated Ib to be 82.5 micro amps. Therefore I need Ib to be greater than 82.5 microamps to saturate the transistor. If I used a 15k ohm resistor then...If Vin = 3V, Ib = (3-0.7)/15,000 = 153 micro amps.Is my logic correct? Vin will vary between 0-10V. I assume this transistor will cope with this.I have attached an image of the way I intent to arrange everything.I hope this makes sense to someone.Thanks in advance.Ed

Topic by denzil023    |  last reply


How could one go about building an electrolaser?

I know there are a few questions from 5-7 years ago, but they didn't seem to have a definitive answer. What would be required(financially and knowledge) to build laser induce plasma channel electrolaser? (see: https://en.wikipedia.org/wiki/Electrolaser) What amount of energy would be required for a small beam to ionize air 15 to 20 feet away?  How could someone build a device like that?

Question by King Awesome    |  last reply


Questions about Capacitors for a coilgun.

Hey, I am attempting to make a coilgun but I was wondering a few things. First I was planning on using this circuit diagram to make one. I was wondering how would I go about adding more capacitors. Since the diagram calls for 1 1000u 450v capacitor, could I add another in parallel? Would this increase the speed of the projectile? Is there any edits you recommend to make on this diagram?

Question by Zaos12    |  last reply


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!

Topic by PabloDee    |  last reply


Can someone help me figure out how to make Nerf hunting darts that will kill birds? Answered

I wanna kill feral birds but I'm only allowed a Nerf gun. Help me!

Question by TheNerdWhoBuilds    |  last reply


3D Print Masks

I wanted to make sure that the community is aware that there are opportunities to put your 3D printer to use helping in this time of need. Some doctors in Billings, MT came up with a design that prints half mask respirators without support and is being used by some hospitals already. I have a dozen masks ready to send to a hospital in ND. A 3D printing community group in CO printed 350 masks and delivered them in just 3 days to a hospital in Denver. I do not know how to hook you up with your local hospital, but for all who are interested in learning more please check out www.makethemasks.com. There is much information on this site including the necessary files. This movement is changing rapidly so keep an eye on the site and local developments near you. Stay Safe, Schockmade

Topic by schockmade    |  last reply


Hi Guys

Hi all, so I'm new to all this, how times change. back 20 years i was a grade A* student in electronics GCSE, now im lost. not using any of my GCSE in 20 years I'm trying to make a few bits in this time of need. looking for help on this, i have a heating element ( water boiler) that is 230v this needs to be monitored so that if the water runs out it will turn off, more to it. water is feed to the unit via a solenoid valve (230v or 12v) this also needs to be turned off if the heater stops, so this is incase the heater not boiling the water then the unit will over flow. If possible i need the solenoid valve to be controlled by a timer, so something like every 20min open then close after say 1-10 seconds, this would ideally be on a adjustable switch so we can set 1sec - 10sec time. hope you all have bright ideas and look forward to hearing them. Kind Regards

Question by M4rtin-iow    |  last reply


is there a way to convert potassium perchlorate into chlorate?

Hi i would like to know if there is a way to convert or decompose potassium perchlorate (KClO4) into chlorate (KClO3), because currently i require some chlorate, and all i can get is perchlorate.

Question by oldmanbeefjerky    |  last reply



is it legal to sell potassium chlorate and perchlorate in Australia?

Hello i am starting up an online store, and two of the products which i wish to sell , are potassium chlorate and perchlorate, however, i do not know, nor know where to find out, what the restrictions are on selling perchlorate, and what licensing ill need  to ship potassium perchlorate, by courier. i have already checked, and i am allowed to ship them, however im not sure about the restrictions on selling them and if i need permits for them, since they can be used for rather naughty things! also, what restrictions apply to iodine crystals, as i plan on selling it too, or must i just report every sale to the proper authorities?

Question by oldmanbeefjerky    |  last reply


Disinfected made it home hypochlorous acid how could it be done does anyone know how ?

I have been researching hypochlorous acid and see great value in the production of it in these viral times.

Question by Pedro verde    |  last reply


How to perfectly Caramalize onions without burning it?

I recently tried Caramalizing onions using ghee and ended up burning it.what need to be done during this.what must be the ideal temperature for Caramalizing it?

Question by Archinston    |  last reply


I want to make 2 way pager(sending and receiving message either by wifi or sim).Anybody can help?

Just same Wants to make 2 way pager for receiving and sending messages by sim or wifi.

Question by pritishs4    |  last reply


Designing the circuit for robot

I am trying to design a floor cleaning robot that is also a obstacle avoiding robot. I want to use two tt dc motors for the wheels, a servo motor to control de ultrasonic sensor and a dc motor to rotate the sponge. Currently I have a Lafvin super starter kit that brings a L239D motor driver that will move the wheels but I am having trouble visualizing how to connect the DC motor and the servo motor. Can someone help with this circuit?

Question by prezgab    |  last reply


Is it possible to connect 2 motion detectors on a light circuit so it will sense movement coming from either direction??

What I'm trying to do is light a 50' long breeze way regardless of which end you enter. As it is now It only lights from 1 end. I'd think if you wire 2 motion detectors in parallel (Black-black, red-red, and white-white) then used the switched output (red) and neutral (white) to power the light it would work as I described. 

Question by AudieW    |  last reply


I want thick cookies not flat, like they get deflated when cooled. HELP! HELP!

Why do my cookies always flatten out.?  I've done everything from room temp butter,room temp eggs.  left batter in ref. over night.  beat with  my kitchen aid and also by hand.   I've used real butter, margarine and butter flavored Crisco.  My sisters have watch me and said I do everything they do and can't figure it out.  I want thick cookies not flat.

Question by bortolus    |  last reply


is there a way to make a soft object hard (e.g. soft plastic)? Answered

Some thing that you could brush on and let it harden?

Question by animan1    |  last reply


Fun uses for Reed Switches?

Reed switches are electro-mechanical devices that opens or closes a circuit when a megnetic field is present. They come in normally open and normally closed designs and range from the size of a grain of rice all the way up to several inches long. A relay, another electro-mechanical device, is comprised of a reed switch and an electromagnet trigger built into one housing. Common uses for reed switches (not counting relays which are used in virtually all electronic devices) include the 'pick ups' on bicycle computers and the sensors on window and door alarms. I just ordered a bunch of reed switches and I need your help in coming up with ideas for what to do with them. Post up your ideas for some things that could be made or modified to be triggered by a magnet coming in close proximity to a reed switch. Remember- the magnet does not have to touch the switch, just get close enough that the magnetic force trips the switch. The stranger and sillier your ideas are the better. Note: this is not a contest and there are no prizes. by posting an idea you are giving your consent for anyone who reads it to use your idea. Posts about integrating reed switches into knex firearms will be ignored (no offence, it's just not my cup of tea).

Topic by Handsome-Ryan    |  last reply


I have frequently tried to download an intractable however I am repeatedly asked for a verification to which is respond and nothing happens

I have frequently tried to download an intractable however I am repeatedly asked for a verification to which is respond and nothing happens. If you could let me know what is wrong that would be great. Thnx

Question by Dak Jack    |  last reply


sonic art

Please comment if u like it and tell me how i can improve sorry bout them bein sideways,in order we have sonic the hegehog,shadow the hegehog,and last but not least knuckles the echidna (edit i have now added neo metal sonic please leave a comment if u want me to draw anyone u want)

Topic by legomaster50    |  last reply