Simple Light Switch Question

Hi there. Very simple question from an idiot. I'm making a mini puppet of robby the robot from forbidden planet. for the mouth i've a simple set of cheap battery powered leds. There are 20 leds and i've got them in 2 rows of 10. I want to be able to operate them in a really simple way so that the top row comes on or the bottom row or both on to simulate robby speaking. My plan is to split the set of lights into 2 sets of 10 and have each on a circuit where i was going to make a switch for each set that is simply something you press down. Then having the 2 switches next to one another so you can press 1 or the other or both at once simply with your thumb, and i'm thinking of simply using a coke tin aluminium to complete each circuit. I can imagine someone who actually knows what they are doing thinking, this guy knows nothing! and they'd be right! but any tips or alternative methods or even confirming this plan will work are much appreaciated, thankyou.

Topic by Beelord 3 years ago  |  last reply 9 months ago

I need help writing a program on Lego Mindstorms EV3

Whattup y'all, I have a Lego Mindstorms project underway, but I can't figure out how to write the program. If somebody out there who is familiar with programming EV3 could help or give me some tips, that would be great!The project is as follows: I built a start/stop timer for micro drones (i.e., a Tiny Whoop) so you can measure your time around your course. Start the program by pressing the center button on the Smart Brick. The setup measures whether or not the drone is on the starting block with the color sensor (either ambient or reflected light intensity). After the drone leaves the starting block, a timer will be set. The timer stops after the drone hits the stop gate, which presses the touch sensor. The time is then displayed on the screen, where you can view it, and then the program is restarted by pressing the center button again.My problem is that I have no earthly idea of how to make a timer with the EV3 software. If you know how, then screenshot it and send it to me, and you will be rewarded with a great Instructable in the near future!Auf Wedersehen, and thanks in advance!

Topic by Thorondor95 9 months ago  |  last reply 9 months ago

Applying modeling clay to porcelain

Hello, I have some porcelain dolls that I would like to embellish with some modeling clay for some Halloween project I am working on. What is the best type of modeling clay that will adhere to porcelain permanently?

Topic by SharBear613 1 year ago  |  last reply 9 months ago

What's your DREAM workshop

Hello everyone!I am looking to create a local makerspace in my town and I want to know what you guys would like in your DREAM workshop. Anything you can imagine no matter how big or small. Post anything you can think of. If it's something that can be built fairly easily too, even better.

Topic by TheCroug 10 months ago  |  last reply 9 months ago

Can You make High Pressure Water Washer with an Air Compressor?

Hey Guys, Any one have experience with fluids? Is it possible to build a device that would take high pressure air from an air compressor and from that make at least a mediocre respectablely powered washer? I'm thinking about buying a small air compressor and and looking to see if i can use it for other things as well. Thanks! JP

Topic by jpl500 11 years ago  |  last reply 9 months ago

Wearable that vibrates on text/sms

I am looking for a way to make a wearable (bracelet or hanger) that will vibrate when I send a signal (i.e. text message?). It's intended use is to alert players to certain pre arranged situations in a game. As coach I can not always reach my players across the field by voice so I want to send an alert signal. Also this is more discreet. A smart watch is to big and volnurable. Bluetooth does not have the range so I am thinking gsm. Any suggestions on how to build such a device?

Topic by Kakebeeke 1 year ago  |  last reply 9 months ago

Laser Engraving Under Glass.

Just put a video on Youtube about Laser Engraving under glass.A lot of people have made their own Laser Engravers using one method or another.I did the same using old DVD drive mechanism's a couple of Easydrivers an Arduino UNO and a 2 Watt Laser Diode and a Constant Current Laser Driver with TTL / PWM.Arduino has GRBL 1.1f loaded on to it and I use LaserGRBL (free program) to do the image settings, generate the GCode and burn the image.It's a good little machine, although the workpiece size is only 39mm x 39mm max.Eventually I'll build a bigger machine, but for now it does what I want it to do.Recently I removed the fan that blows the smoke away because it was whining a bit and getting on my nerves.So instead I tried using a piece of glass cut from an old flatbed scanner, on top of the workpiece.Seems to be good quality clear glass, I suppose it had to be if it was in a scanner.This stops the Laser from producing smoke and also soot.It does however produce a sticky residue on the back of the glass, but that can be cleaned off in soapy water.I was quite surprised at the results.Laser Engraving Under Glass.

Topic by StuartB44 9 months ago  |  last reply 9 months ago

Trimmer Engine Generator

   Hello Instructables community.    I was thinking of making a 12 volt battery charger with a trimmer engine (pictured) connected to a scraped car alternator (I found several on eBay). But I have a few questions: 1. Would such a combination work as shown in the illustration?  2. Would it be best if I directly connected the engine to the alternator with no drive belts or chains, or would the high gear of the large engine gear and small generator gear be worth the extra trouble.  3. What is the best way to connect the two? And 4. Where should I remove the engine from the "trimming part". Any answers will be appreciated.                                                                                                                       Sincerely                                                                                                                  Confused DIYer

Topic by maalikm911 2 years ago  |  last reply 9 months ago

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 10 years ago  |  last reply 9 months ago

Lightbulb!!!!! Anybody up for a Rubik's MP3?

Once again, I have had an idea beyond my capability to perform (I need to get my first job soon...): an mp3 player inside a Rubik's 2x2 cube. I am not sure if it would work while still being functional, but even if it can't move, it would still be cool! Can someone PLEASEPLEASEPLEASE do this and post it? Danke schon!

Topic by Thorondor95 9 months ago  |  last reply 9 months ago

Help us decide upcoming contests!

EDIT THIS FORM IS NOW CLOSED - THANK YOU TO ALL WHO PARTICIPATED!For contest suggestion, check out this thread: We can’t wait to see what you make in 2018!@audreyObscuraInstructables Community Manager

Topic by audreyobscura 1 year ago  |  last reply 9 months ago

How to measure the distance using laser

Hi everyone, so I would like to measure distance up to 12m using Laser ..the question is how to do so ? I want to make a simple sensor that can do the job.I know that for that i would need a reflector and the basic D=V*tso the problem is how to get the "t" !?

Topic by AbdChahidS 9 months ago  |  last reply 9 months ago

How to make a GIANT rotating tray (lady susan) for 3Dscanning people?

What materials do I need?Can I do this with a trucks's bearing ?what thing Should I use to make it rotate, strong enough to sustain a person?What Things do I have to take precaution on?

Topic by DIAGONALLIS 11 months ago  |  last reply 9 months ago

Flyback transformers and how to convert them to AC

I'm in the need of quite a few electronics for my new lightning tube project, on of them is a suitable HV transformer for high frequencies. Salvaging from plasma balls or similar is pointless as those transformers only get to around 3kV at best. With BW TV set getting really rare these days I decided to look into the modern version of the flyback transformer - the DST, Diode Split Transformer. If you ever did some Tesla stuff you will know that everyone says a modern flyback is no good as it only provides DC output. With basically no info on the net how these things look internally it was down to destorying a few until I got to know what to look out for andhow to remove the HV diodes between the secondary coil packs. I know not too many people will need a HV AC tranformer that can operate with several kHz so I though I ask first if it is worth to create an Instrucatable on this topic alone, otherwise I will just include a very short version of it with my Instrucable on the lighnig tube project. Have to say that is a quite messy and stinky procedure involving a lot of heat and the risk of burns to your fingers.

Topic by Downunder35m 4 years ago  |  last reply 9 months ago

Survey on the Workflow and Collaboration of Makers and Their Community

Im currently conducting research for my final year thesis which the aim is to identify insights gathered from this survey to understand the workflow and collaboration of the online and local maker communityMy aim at the end of this is to identify what could be beneficial for the maker community, whether it be in the form of a physical or online tool or even a set of guidelines to act as stepping stones during conceptualisation and prototyping for a user. You can answer the survey here This will be great help to get some participants and I hope my research and resources gathered will be a benefit to the online and local maker community.

Topic by Renegade Designer 9 months ago

Can't login in app

Great site but I am unable to login with Facebook or email from within the app. 

Topic by ssouthern 4 years ago  |  last reply 9 months ago

DIY brick making machine or DIY compressed brick making machine

Can someone post an instructable on how to build a DIY brick making machine or DIY compressed brick making machine? Cheers!

Topic by rickyt 4 years ago  |  last reply 9 months ago

Voltage from 4 wire bipolar stepper motor!

I've stripped a 1.8 deg stepper motor out of an old fax to make a bike generator but I can't get any juice from it. I'm spinning it using a multi tool so I should get something, right?! I did do some research and found out that 4-wire bipolar stepper motors are controlled differently from 5+ wire ones. I guessing then that generating power is different also. I'm reading 2.1 - 2.3 ohms off each coil. Tried wiring the coils in series but still nothing. I need a long serving instructablator to help me!! The label reads: STP-42D1020 1.8deg/STEP 2.1 ohms 33.5 V D.C. 0.7 A 17845G SHINANO KENSHI CO LTD. CHINA

Topic by ZdEEvO 10 years ago  |  last reply 9 months ago

Homebrew trench-digger?

(crossposted in, ummm, not sure what other forum yet.. lol... in case no one reads it here) I've been thinking of several ways to build a device similar to a Ditch-Witch©™ for narrow/shallow trenches - like for coax cable and antenna radials etc. but keep coming up with examples that don't look they would really work - things like a modified chainsaw (running at low RPM) or a high-torque circular saw with a modified digging blade.  The problem seems to be *how to dump the dirt next to the trench, not back into it* Sure, I could rent a *real* trencher for a couple hundred dollars for a quarter-day, but that's not really feasible as I'm on a fixed income. Any guidance from the collective genius of the group? Thanks bunches!!! Tom

Topic by fernblatt 9 years ago  |  last reply 9 months ago

Is there ANYTHING I can use old dial up modems for (other then dialing up the internet)?

Any old, or unique ideas on what I can do with them?  I have one that is fairly fast (an old cable modem) one that is medium fast (an old DSL modem) and one 56k plain vanilla dial up.

Topic by Goodhart 8 years ago  |  last reply 10 months ago

Modded nerf guns for sale on ebay! I'll mod them just for you. Look inside.

Ever wanted to snipe a freind from 80+ feet away with a suction-cup dart? then you need a modded nerf nite finder!How about the urge to unload 10 shots of foamy death in under a second? Then you need a modded nerf Power-Clip.And for isane power, a clip system, and kick-butt looks, you want the nerf LongShot.I will modd them all, just for you! Nite FinderMavrickFirelyLong-ShotTitanBigBadBowand alot more!I mod them all.Get the gun you want today.I Can paint your nerf gun in any color you would like. I have a few pics of some of my paint jobs below.I can modify ANY nerf gun avalible in stores, once modded you can purcahse the gun safly and with trust that it will be deliver ASAP!My mother's 100% positive feedback ebay account.Simply email me saying what gun you would like, ill go out to the store and buy it, take it home, mod it, and the ship it to your door. you get a BRAND NEW modded nerf gun. Sweet!I can also make quality homemade nerf darts. Just me at: Jhalek90@aim.comOR AIM: Jhalek90Get nerfing~Twisted

Topic by twisted 12 years ago  |  last reply 10 months ago

Am I missing something or is this battery charger just insane?

I bought this cheap charger that charges 2 Li-ion 18650 on eBay: it charges them in PARALLEL!So if I put charge two batteries that have a different voltage, the charger will drain one and charge the other one at a pretty high current.If one battery is older, or has a different chemistry, it must not healthy to charge both.If I decide to charge only one, will it push too much current into it?If someone accidentally inserts one in reverse...If you want to charge 2 batteries that are exactly the same, make the charger a built-in feature in the device that uses the batteries, why disconnect them. Used batteries will always have a different voltage!I used to charge them with this cheaper charger, but I recently found out it charges them to 4.30V sometimes, and I want to be able to charge more than one at once...I don't care about charge time since I have a bunch of batteries always ready to use, prefer not to have our house burn down, but don't want to spend too much $ on a charger. Watt do you think of these? I don't want to pay 8x the price to have a charger tell me the voltage and be limited by USB cable's current... ("smartest" & most expensive. Still, only tells the voltage) (confusing) (not "smart" but seems the best IMO) (Hmmm...)Because we all know what can happen with an 18650 gets angry... Though I have used this charger to charge 15 y/o 19650s that were 0V, back to normal and they are like new now...

Topic by Yonatan24 10 months ago  |  last reply 10 months ago

How to use these salvaged cell phone parts?

I found a busted up LG Chocolate the other day (it still turned on but it had no network or anything so I took it) and decided to take it apart and use what I could find. What I got was: -A camera -A microphone -A nice speaker (the loud one that the ringtone plays through) -A little silver circle (what is it!?) -And all of the IC's. I really want to know how I can use the camera, can anyone point me in the right direction? Also, the phone has GPS, but I doubt I'll be able to remove the module without destroying it (especially since I don't know which one it is..) And where is the vibrating motor?!

Topic by Login258 10 years ago  |  last reply 10 months ago

Paris, France, Francophone, BIENVENUE !

Bonjour a tous et a toutes (y a t il des filles sur instructables?) ! Bienvenue sur le groupe instructables en francais !, pas d'accents aigus et graves ni de ministere de l'identite nationale mais pourquoi pas un groupe instructables ! Rejoignez le groupe !Vous etes les bienvenu/es pour poster des "instructibles" en francais, creole, kanak ...Et invitez vos amis ici ! Plus on est de fou ...Et d'ailleurs, quand nous serons suffisament de membres, allons boire un petit coup ensemble !A bientot !

Topic by cesar harada 12 years ago  |  last reply 10 months ago

How many languages do you speak ?

1) How many language do you speak ? 2) What are they ? 3) Which one(s) do you speak fluently ? 4) Which one is your first language ? 5) Do you find usefull to speak more than one language ? 6) Which one (of those you speak) do you find the most difficult ? and in what is it difficult ? 7) What language would you like to learn ? edit: (two more extra questions i forgot to ask ...) 8) Why did you learn these extra languages ? 9) How often do you use these extra languages ?

Topic by chooseausername 11 years ago  |  last reply 10 months ago

Please cancel my subsrcription immediately.

Please cancel my subscription

Topic by naturegirl 9 years ago  |  last reply 10 months ago

Pyrolixer - can you help me figure out what it is?

I need to figure out the actual name of something I bought years ago under the name of "Pyrolixer" for pyro-effects (in Germany). I am also curious as to whether you could diy it.Let me describe what this is about: a liquid that you apply to paper and let dry. When you set fire to that area, it will smolder away, but only where you applied the liquid. From what I gather, it is used for magic tricks and similar effects. In addition to have paper smolder slowly, you can use it to reveal a message by letting it burn away specific areas.Can anyone help me out? "Pyrolixer" does not appear to be a good search term, and thus probably now the English/original/technical name for this. Any feedback is appreciated, and ideas about how to make your own even more so!Thank you!

Topic by Dominic Bender 10 months ago  |  last reply 10 months ago

How to wire a 3 terminal socket ( i believe they are called 2 way sockets

I would like to put led mini lights inside of a liquor bottle lamp that i bought, my question is how can I connect this to a 3 terminal socket so i would be able to turn on just the mini light, or just the lamp bulb or both at the same time.

Topic by jeffsdad 10 months ago  |  last reply 10 months ago

Search problem.

I wrote an Instructable on how to use the Verowire technique to make circuit boards. Rather oddly a search for "Verowire" does not find it. It finds other things which do not have "Verowire" in the title, but not the article that does. So perhaps I didn't need to bother writing the article, perhaps my search to see if it had already been written wasn't as conclusive as I thought.

Topic by andypugh 10 months ago  |  last reply 10 months ago

How Do You Make Lollipops Like Astro Pops?

Hi.  I would like to make lollipops like Astro Pops.  Dense, long-lasting suckers that get a bit pliable when eaten.  any ideas?  Thanks!

Topic by lkl123 6 years ago  |  last reply 10 months ago

I'm having trouble with my sketch regarding how to code , my stepper motor traveling to a limit switch then reversing and accelerating to another limit switch.

I'm having trouble coding at a point, I built an Equatorial Platform for my telescope so I can track the stars.I have a Nema 23 stepper( 1.8 * step, 200 steps per rev.) motor with an Arduino and a Easy Driver for my micro controller. My problem when I make my sketch I have the stepper motor running at 92- 104 RPM with a potentiometer to fine adjust, at this point when my platform hits a limit switch then I want to reverse the motor and accelerate it to 2000 RPM then decelerate to 25 RPM before the platform hits an other limit switch, then start the process over.How do I incorporate accelerating coding that to a certain point then decelerate motor before it hits the other limit switch. Do I need to find some timing coding ( for some length of time), before I want the motor to decelerate to hit the second switch. I don't want the motor running at 2000PM to hit the limit switch, I want it to decelerate before the limit switch. then reverse the motor again to 92 - 104 RPM. I'm a novice at coding with little electrical background. Your assistance is greatly appreciated. Jack Brockhurst e-mail

Topic by jacam9803 10 months ago  |  last reply 10 months ago


I've bought 3 ebikes one a Raleigh select,p/assist, one a throttle type, but wires on 1of the other bikes I've bought,the wires that lead into hubmotor are cut they don't seem to connect via a hole in wheel axle/spindle,so need help please,also the p/assist Raleigh can it be converted to throttle powered, as its a very old ebike with a sanyo hubmotor? Thanks...

Topic by AlanW131 10 months ago  |  last reply 10 months ago

New ideas for Tiny Whooping?

Guten Tag! I have a Tiny Whoop sitting around just begging to be modified in some way. I need some new ideas. Anything I successfully pull off will be published as an Instructable, so it'll come right back at you!

Topic by Thorondor95 10 months ago  |  last reply 10 months ago

New comments/questions/tips

... are much improved. I like the fact they're all rolled into one list, that I can now respond to tips, and select best answers for questions, and upvote anything I so choose. Great improvements from an authorial standpoint, thanks!

Topic by makendo 10 months ago  |  last reply 10 months ago

dancing paper dolls with magnets

When in Europe, I saw a street vender that stood near his little boom box and had 2 dancing paper dolls next to it. I bought the paper dolls and now need to figure out what he did to his speakers or magnets in his speaker to create this illusion of dancing dolls that can dance next to a boom box. The dolls had magnets on the backs of them, so it had something to do with a magnet inside his boombox. Can you help? Thank you.

Topic by tedvanilla 11 years ago  |  last reply 10 months ago

Converting sound to ultrasonic

I need to convert a bird sound from the audible level to the ultrasonic,  close to the the 20khz level. as long as we human cant hear the sound.  My question is,  what is the best method to convert this file? thanks in advance

Topic by bujuk 8 years ago  |  last reply 10 months ago

15W laser

Help help help! Ive just fitted a 15w laser to my cnc 3018 and I cant get the laser to switch to low power mode. It just wants to burn everything! How do I fix it? Ive attached two pictures, one of the laser and one of the board. The board is a woodpecker GRBLO 9. Please if anyone can help me I would be eternally great full.

Topic by MattK171 10 months ago  |  last reply 10 months ago

How much does a one month premium account really cost?

I know how instructables already has loads of information without being a pro. But we have this lab project that we have that we really need to do in order to pass and we would need to download a pdf file for the codes for the program. Im willing to subscribe for one month since i saw that it would only cost 2.95/month, but then when i look at the check out, it is 35.40 dollars? does that mean ill be charged 35.40 dollars right away when i subscribe? i find instructables really useful and i think i might be able to go back here for our future projects in school but i dont think i could afford to give 35.40 dollars when i think we would only need it for a month,  :( Maybe there could be a one month trial? Any help or information would be really great! Thank you in advance!

Topic by Sherainne LouiseC 2 years ago  |  last reply 10 months ago

3D Printer use

I was wondering if anyone would do some printing for me. I don't have the item designed yet and wasn't really wanting to buy a 3D printer just for one idea so I would need some help designing it and what format it needs to be in.

Topic by wsround 10 months ago  |  last reply 10 months ago

Pro membership for exchange of donations for a friend fighting cancer

I'm organizing a gofundme campaign on behalf of a friend, mother of three young kids, fighting advanced stage cervical cancer . And I have many pro memberships to exchange for donations. For a $5 donation, I will give you a 3-month pro membership, $10 donation a 6-month pro membership, and $20 donation a 1-year pro membership. I thank you a million times for your kind help!

Topic by babybayrs 10 months ago  |  last reply 10 months ago

Non lethal poison blow darts???

Non lethal poison blow darts.? I was thinking about making blow darts then the topic struck me, could common natural non lethal poisons or toxins be used in blow darts. This sounds a bit vague, so heres and example: you take poison ivy leaves and either wipe the darts on the leaves or grind up the leaves then rub darts in the mix. Would this work, how effective would this be?. I am not planning on even attempting to try this, this is for informational purposes

Topic by HOMEPIE64 10 years ago  |  last reply 10 months ago

Site takes me to malware

I was interested in going to the site on the off grid solar panel that I recently got an email about. The reference take you to a malware site

Topic by richardnml 10 months ago  |  last reply 10 months ago

What's Inside an Instructables Prize Pack?

For a while, I wondered what was inside an Instructables prize pack. Now that I've gotten one, I decided to post the contents so that others know. An Instructables t-shirt (you can choose the size)A notebookA cardA tattooA pin2 stickers, one large and one small and roundAlso, a huge thank you to the Instructables team for organizing contests! YAY!

Topic by ProfessorPi 11 months ago  |  last reply 10 months ago

Black Ops II - K'NEX Weapon Versions "Wanted"

Hey Guys. Well, Black Ops 2 is a pretty sweet game, and I am sure you already know this. The thing you may not know is that many people, including me, would like to see K'NEX versions of those guns included in the game (and trust me, I plan on building some of these...). So without further adieu, I present to you pics of the Assult Rifles, LMGs (Light Machine Guns), Shotguns, Pistols, Shotguns, Sniper Rifles, and SMGs (Sub-Machine Guns) of Black Ops 2 (see names below). Assault Rifles (pics 2 - 8): 2) TYPE 25 3) AN-94 4) FAL-OSW 5) M8A1 6) M27 7) MTAR/FLATTOP TAR 8) SMR Light Machine Guns (pics 9 - 12): 9) QBB-LSW 10) HAMR 11) LSAT 12) MK-48 Pistols (pics 13 - 16): 13) Five-Seven 14) B23R 15) Exicutioner 16) TAC-45 Shotguns (pics 17 - 20): 17) S12 18) KSG 19) M1216 20) R870 Sniper Rifles (pics 21 - 23): 21) SVU-AS 22) Balista 23) DSR-50 Sub-Machine Guns (pics 24 - 29): 24) PDW-57 25) Chicom CQB 26) MP7 27) MSMC 28) Vector K10 Some of these guns seem pretty impractical, but they will be cool none-the-less. Lets get building. =D -The Red Book of Westmarch

Topic by The Red Book of Westmarch 6 years ago  |  last reply 10 months ago

Arduino color sensor 34725

I was using color sensor 34725 with arduino to detect colors but it seems it is working a bit strange i have uploaded the picture of the data i gather from my experiment here are the confusing things1.why green value is also high when i place sensor on blue paper?2.why green and red color are significantly more in yellow as compared when they are place on their own color.and so on, i mean the color sensor does not seem to work properly

Topic by DabuHackker 10 months ago

Can't access new mails in inbox or reply to messages

My inbox shows new messages but I can't access them and they do not show in my message list. I tried to reply to an old message as a test and could not do that either. I tried both IE and Chrome. any suggestions?

Topic by Mr. E 10 months ago  |  last reply 10 months ago

Create a phone shell/frame/body?

Hello all,The new phones these days break too easily and its harder and harder to replace the battery or sim card. Instead of buying or making a case, my idea is to make a phone shell/frame/body with a 3d printer, and just taking the parts out of my Samsung and just putting it into that.Is it doable?

Topic by frostieff 11 months ago  |  last reply 10 months ago

How images for website on raspberry

I create a page for managing raspberries, but I can not add a picture of what I'm doing to set the path to the picture in the index.html or how to open access to system folders in raspberry

Topic by АлексндрЛ 1 year ago  |  last reply 10 months ago

how can i make a toy plasma thruster that actually works???

I'd like to know how to make a plasma thruster like the one on that one youtube video. If you know how, or you were the one who put up that video, please put up an instructable on it and send me the link. You can reply to this post on my orangeboard on my profile, thanks...Youtube video: Plasma thruster:

Topic by nathanzhang 11 years ago  |  last reply 10 months ago