Will a SSR work with a PWM signal?

Hey guys gotta quick question: I need to be able to cut a PWM signal from a motor for a project. I'm currently using mechanical relays but I'm curious, will a solid state relay work? I know there are easier ways to do this but for right now I'm on a clock and I just want to  know whether a SSR will work for cutting a PWM signal.  Thanks guys!

Topic by HavocRC   |  last reply


How could I make a hidden space in my room? Answered

I have a fairly small room and i want to make a hidden space big enough for a small person to fit in. Could i build a piece of furniture and a compartment in the back? What about making fake drawers under the bed? Are these awful ideas? Do you have any more? p.s. I don't have a closet.

Question by Herbal_T   |  last reply


BooHoo Previous Comment Persons

​Hello,  Reading some of instructables comments necessitates me to comment on you! I find Instructables as having interesting content which has appeal to a variety of people  regardless of their mental capacities.  Items portrayed on the site are creations of every class of people. Having a special talent, each of them feeling a little pride, bravely present their subject matter with instructions,  pictures, videos, FAQ, help? and their names are printed on the website. Speaking to the big shots who know it all.  This is not a specific website geared to the most intelligent humans like yourselves.  If it looks like a project for a 5 year old---it probably is! Clever mistake observers, nice of you to point it out.  Did you fail at the project?  Did you do something wrong?  If after you check yourself and it happens that you are right.  Why not have a little consideration, call or email Instructables, insuring the situation is clarified by the important people involved.  You would be saving the embarrassment, ridicule and self-esteem of an individual, or didn't you think of that? Instructables your website is unique, interesting, educational, subject matter is something about anything! The site has helped me babysit, fight boredom, release stress and laugh hysterically! Thank All of You at I.,  Amrie C

Topic by amrieC   |  last reply


Interstellar Movie Tars Robot

Hello! I would really love if someone could make me a replica of the robot from the movie Interstellar. My version of the robot can be much more simple. I have no need for a robot that can actually fix a spaceship lol. I would just like for it to be able to walk (in the movie the robot moves several ways - but one way is enough) and talk (only saying four or five phrases). The below link shows the structure pretty well. Can anyone make this happen for me? https://ideas.lego.com/projects/85614

Topic by pierce.angela.n   |  last reply


Favorite/followed people won't update

I have recently had an error where my favourites and followers won't change. I originally encounter this bug a few days ago, on my mobile OS. I tried to favourite a instructable and it showed that it was favourited ( the heart turned pink and all. The next day when I wanted to see the instructable it wasn't in my favourite list. I tried it a couple more times on my phone but it wouldn't keep it on my favourite list when I shut down the app. I tried to delete favourites to see if that was the problem but I had the same error it would show it was unfavourited but It would still remain in my favourites.  I then tried to use my PC (ASUS G750J laptop using chrome) same program but now I noticed that when I favourited/unfavourited an instructable it wouldn't change the total count of favourites for that instructable. I tried to delete my cookies and cashe for Chrome but I'm still having the same problem.  Thank you and I look forward to your replies.

Topic by Hobopetter   |  last reply


Is Ikea the only place that recycles incandescent light bulbs as well?

CFL bulbs need to be recycled properly due to mercury content, and there are many places: Park districts, hardware stores, Ikea, etc. that recycle CFL bulbs. However, I haven't found any place that recycles incandescent bulbs, I searched online and they say, they don't contain any toxic chemicals and can be thrown in trash and not curbside recycling. However can't the glass be reused to make new bulbs? I am sure they can reuse the glass, and the filament is probably too hard to recycle but the glass could be. I know Ikea recycles incandescent bulbs as well, but why aren't there any other companies that do? Also LED bulbs, I guess dead LED bulbs can either be returned to manufacturer if it has warranty, or in electronic recycle.

Topic by ADRIANT28   |  last reply


how can i power three servo and an arduino UNO using a single 12 volt battery?

I have a 12 volt rechargeable battery, and I am in need to provide power supply to my project, that contains 3 servo motors ( 2-MG995 and 1- DXW90) and also my arduino UNO . I am getting issues like when i use all these through arduino the arduino stops working. so how can i solve this issue. I have a small bread board,should i use it for delivering power.. please guide me so that I could finish my project ...... suggest me some connections so that i could understand....

Question by JeevsJ   |  last reply


OSIM uSqueez foot massager sparking how to?

OSIM uSqueez permanently dead. Dismantled unit found mother board 2A fuse blown. Check everything OK on mother board and replace fuse. Power on unit led under stop button light up. Pressed vibrator button works perfect. Pressed massage button strong sparking sound and saw fire in one to two second followed by blown fuse. 1. Measure the motor terminal resistance -> 0 ~ 5 ohms. Or it should should have some high resistance approximately 10 ~ 50 ohms. 2. Measure BR-B3D thermal protector which was in series with the black wire -> 0 ~ 5 ohms. Any idea which one is faulty part? 1. Think the thermal fuse is OK. 2. If the motor short, shall I do rewinding for rotor? Can't found this motor locally and if buy direct from OSIM too expensive! Any idea measure rotor coil? Thanks

Question by GearUp   |  last reply


Interesting TAP handle tech question \ quest.

Here's a weird one for  you guys. I recently bought a Beer tap handle and noticed that it had an insert that had some LEDs on it. Cool. The problem is that the LEDs don't light (beyond a tiny SMD red LED heartbeat). I found a small button that when depressed seems to trigger a test. Bright white LEDs on the top and bottom flash to illumnnate the top of the tap (either a clear baseball or FIFA tap topper) as well as the body. It's hollow plastic so it briefly glows. The problem is that I can't figure out how to light the things beyond the test (for which you have to remove it from the handle). The guy who sold it to me said they've sold lots like this and could never figure it out. I figured light sensor? nope. Tilt sensor so it'll flash when you pour a beer. Nope. I broke out  my loupe and noticed a funky thing on the circuit board that looked like it had an antenna. It was an Anaren A1101R09A. This thing is a radio tranceiver!  That tells me there was a remote with it that was lost in the few days after they bar got their new tap handle. Does that sound right? If so I was wondering where I could get or build another. I could put together some other LED solution, but I'd love to get this to work. HEre's a pic of the tap handle and the insert laying on it's side. The right side is the up side with the transceiver. It's blue if you look closely. Not sure I'll get a solution, but there's some clever people here, so you never know. Thanks for reading.

Topic by mcgary911   |  last reply


How Would I Make A Light-Proof Air Vent, Please?

Hi - thanks for stopping by. I am in the process of making a dark-room for my photography. It is stuffy in there and I have an air-vent which lets in light. I would like to make a cardboard box (or something) that I can put over the air-vent so that air can flow freely but will still not allow light to venture through. I would appreciate anyone with any ideas please ;-) regards Kevin

Topic by kevinhannan   |  last reply


How to Make a Constant Current Lithium Ion Charger

Hi Guys! I have a bunch of 18650 lithium ion batteries that can handle a charge rate of 5C. Each one is 3,000 milli-amp hours, and I would like to build a charger for them as my project. I understand the mechanics of charging lithium ion batteries, and that they need to be charged at a constant current up until that current reaches 4.2 volts, than switch over to constant voltage. The constant voltage charging makes up about 20% of the battery capacity, and I am willing to forgo that amount. What I am trying to build is a constant current charger for it that would  charge at a current of 1C, and shut off when it reaches 4.2 volts, and I would like some help as to how I would do this. I was thinking that I would have some sort of current source that supplied 3 amps and then have a relay that would shut off the current as soon as a voltage detector reached 4.2. I do not know much about current sources, so I am asking here for some help. Thank You for Your Help!

Topic by merlinj   |  last reply


Banging Fan

For some reason the central heating/cooling fan is making a banging noise. I know it is the fan because when it kicks on, I start hearing a banging noise. It like bangs 4 times a second.  Does this mean I need a new fan or can it be repaired? Also is this a motor problem or a problem with the fan wheel? It sounds like hitting an air duct with your fingernails.

Topic by ADRIANT28   |  last reply


Are canned food cans made of steel?

By canned food cans, I don't mean soda cans, I mean the cans that pineapple and corn and other stuff come in, just to be clear. From what I know, it's probably not aluminum because it is magnetic. So what metal is it? Is it combined with different metals?

Question by Orange robot   |  last reply


Another car that runs on fresh air.

Here's another chap with a car that runs on compressed air.He's got more potential than past attempts, though - F1 engineering background, large backer, neat trick for extending range.The video and Previous BBC "airing"Canadian news articleCritical article from Oil Drum (Australian energy site)Oil Drum: part 2Air Car siteEDIT (MORE REFERENCES)Another BBC articleMDI Engineering site (they make the engines)Tata Motors (who plan to build the car)

Topic by Kiteman   |  last reply


Animated GIFs

My cover image is a animated GIF and it works fine on a PC.  I tried to view my instructable on an iphone and ipad.    It doesn't animate at all on the Iphone app unless I click on the image.  It comes over as a fractured picture on the Ipad app.  Has anyone else had the same issue? Here is the project.    https://www.instructables.com/id/Trammel-of-Archimedes/

Topic by mtairymd   |  last reply


Suggestions for painting an Invicta diving case?

So I've got some Instructables in mind for painting a Nerf Maverick. (Wait, you said you were painting an Invicta diving case...) Yes, you're right. The case will be a custom painted case to house a custom painted Nerf Maverick for a Christmas present. However, I have some questions about how to paint it. The case has a rough outside made from what I suspect to be high-impact plastic. The inside is smooth plastic with removable foam inserts and a rubber gasket seal. I know I will have to sand the inside to make the paint stick, but my question is if the outside is already a rough textured plastic, will I need to sand it as well? Also, what paints and finishes do you suggest for painting this case?  The Invicta logo on the back will need to be sanded (although I suppose I could leave it since they manufactured the case). The picture shows what my case looks like, minus the graffiti image. Thanks in advance, and God Bless!

Topic by IrishSnow35   |  last reply


electronically measure poundage of an impact?

I'm looking to make a training device that measures the pound force of impact from a strike. I'm sure the is a sensor out there that does this but I don't know what its called.  

Question by wgriffith   |  last reply


Voltage help

Hello I am new to electronics I am having trouble designing a circuit that lowers VDC as ground resistance increases and raises as ground decreases every circuit I've built works backwards. I am working with 5vdc any help would be much appreciated thanks

Topic by Ed69   |  last reply


Where can I get tapes for Commidore 64 in audio format?

I recently got a Commodore 64 and plan to use it for vintage coding and playing retro computer games. So I want to load some Basic code on some games like Pacman, Tetris, etc.  I would like to load sound from my phone and connect an AUX cable to he input port, the conputer will think that I am loading a cassette since it is analog and is really just looking for a sound. I can't explain everything so well, just go to this video, https://youtu.be/_9SM9lG47Ew and skip to 7:32. That should explain what I am talking about.  So my question is what are those websites with retro games file in cassette (Audio) format that I can just plug in my MP3 player or phone or whatever into the input port and the computer will think I am loafing a cassette? Also I guess if I want to record I will plug in my phone to the output port and record audio. So basically can someone give me a website where I can retro games in audio format like what I explained? Abd sorry if this is the wrong category.

Question by ADRIANT28   |  last reply


Image names for pictures in library

When using more than just a few pictures for an Instructable I noticed a very annyoing "bug" with the filenames of the images. It seems to be impossible to keep the original filename. Instead it is completely replaced by some cryptic string. I think the reason is to make sure all files have unique names for the servers but would it be possible to simply add this cryptic stuff AFTER the image name? When embedding images into the text through HTML it just makes finding the right image a real pain...

Topic by Downunder35m   |  last reply


pdf file does not download as pdf

I just downloaded what was supposed to be a pdf from https://www.instructables.com/id/Narnia-Book-Sculpture/  When I hit the download button, it downloaded it as a file with no attributes. I couldn't open the file. When I added .pdf to the filename, it worked, so it is a pdf file, it's just not downloading as a pdf file. I'm on a windows machine running 7, using Chrome.

Topic by fxblf   |  last reply



Sealed gravity liquid dispenser

I am looking to build a sealed gravity dispenser similar to this one.... http://www.dudeiwantthat.com/household/bar/liquor-log-booze-dispenser.asp I'm trying to figure out the best route to take, I have a beer tap I will be using. My problem arises with running plumbing in a solid piece of wood without cutting it in half. I plan to use pvc and but that means I need a 90 degree angle in the block of wood or log. Is it possible? My best idea is to drill my holes and cut a chunk out of the back that can be glued back. My next question is. How to attach a bottle? Obviously I have to have the bottle upright and place the dispenser on the bottle and flip it. But how to get a seal on the bottle that will work with different bourbon or whiskeys. Thanks on advance for any help.

Topic by AndyB107   |  last reply


Building a Stereo Tube Amp

I'm in the UK and interested in Building a Stereo Tube Amp (by thobson in audio). Can anyone advise on the UK equivalents for many of the components used in this project e.g. transformers, valves (tubes) and where to buy them? Many thanks.

Topic by DonaldStott 


Pdfs not downloading

Hi all,  since ive upadated my new iPad Pro to the newest operating system from Apple I cannot download PDFs anymore, it worked fine before I downloaded the new operating system, anyone else have that problem? anyone know how I can fix the issue?

Topic by cockleman1   |  last reply


Cool Free Papercraft Links

These are some good papercraft links.. at least by my standards...Canon 3D PapercraftVarious papercraftYamaha Motor PapercraftPapercraft motorcycles and such. There's also animals Professional Level.papercraft space vehiclesUm.. I don't really know anything about this one..I just found itPaper robotsI like this one. Transformers that really transform. And various other robots..3d Paper ModelsRecommended by jtobakoIceberg PapercraftsRecommended by jtobakoPaperToys.comRecommended by SFHandymanFlying-Pig.co.ukRecommended by SFHandyman. I believe you have to pay for some.(Some Free models can be found hereHalo 3d PapercraftGreat site recommended by Chicken2209. Requires Pepakura. (For more info on Peparuka, and how to use it, click hereNintendo PapercraftRecommended by xupower. The name says it all.Paperkraft.netRecommended by GorillazMikoPapercraft ParadiseBlog Format. Great stuff.If you know of any papercraft sites, plese list them below. Enjoy!

Topic by Keith-Kid   |  last reply


Real-time Ocr and SMS Notification?

How can I develope a program as I explain below? I don't know where to start. By the way, I know C language. Is there any helpful resource about this subject? Thanks. For example, there is a live number generator between 1-15 as image. This images changes every 10 seconds. Program should catch the image everytime as digit number. By the way, there is 3 integer variable as a,b and c: If the number between 1-5, then variables b and c should increment by 1 and 'a' should be equal to 0. If the number between 6-10, then variables a and c should increment by 1 and b should be equal to 0. If the number between 11-15, then variables a and b should increment by 1 and c should be equal to 0. If a,b or c is equal to 13, then program should send an SMS to phone as for example 'a is 13.

Question by kaann45   |  last reply


How do I turn the wheels of a toy car? Answered

I am trying to make a toy car using dc motors, which will also have a wired remote control. I am planning on using two motors for the forward and backward movement of the car. However. for turning the car sideways, I need a way to turn the wheels. The best way I can think of is a small rotating structure with two wheels at the base of the car, like some toy cars. Using two dc motors, I would be able to steer it left or right. However, I am looking for a more elegant solution. Can anyone help me?

Question by yagarwal2   |  last reply


Dutch knex guns, wars and other things

I know there are some Dutch knexers here. Since Holland is quite small, maybe we can have a war or share ideas. If you are Dutch tell me and if you're interested in a war say it. Since this is ment for Dutch people i will now continue in Dutch. Als het je wat lijkt om een keer een gevecht te houden PM me dan en ik zal proberen meer deelnemers te werven. Als je weet welke mensen met knex instructables Nederlands zijn post dan even een comment. Voor een war geldt:          minimaal 12 jaar oud                                              maximaal 15 jaar oud                                              minimaal 3 maanden ervaring met knex guns                                              over de tijd, locatie, plaats en regels kan worden gediscussieerd.                                              GEEN GEWEREN DIE VERDER SCHIETEN DAN 25 METER!!!!! als je tips hebt of je wilt gewoon wat kwijt, zeg het dan P.S. Use google translate if you want to know whats written in Dutch (it's just the age, experience and requirements) P.S. If you want to say something, post your comment in both Dutch and English if possible

Topic by Knex.X   |  last reply



New Login released

Hi! We've just released an update to the site. It doesn't do too much, but now the login should be a pretty window that pops up and looks a little better than the previous one. There's also a new design for the Go Pro page, but if you're reading this then you're probably never going to see that page. As always, please message me directly or post to the support forums for help or if you notice any problems.

Topic by dworley   |  last reply


How do I manufacture this paper/pulp detail?

I have a small detail (abt 50x35x20mm) that I want to take from 3D to reality. It would be easy to just send it to the local 3D print hub, but the issue is that I want it in some kind of paper pulp material, or some other material that can withstand heat and also be lightweight. I know that there exists 3D printers that can print in paper, but I haven't been able to locate a print shop with such a machine. For prototyping, I have cut kraft paper sections and glued together, but I'd like to find a faster way. There is also a production method for pulp moulding, but the shape of my detail is too complicated for this method. Any ideas of production methods or materials that I could use instead? The detail can be split in 2 if neccessary, but I'd prefer not. Thanks in advance!

Question by karolina81   |  last reply


Profile Page Updates

Hello Everyone! Many of you have noticed and commented on the site updates that went live on Thursday, October 20, which included substantial design changes to the member profile page. The profile page is near to many of your hearts as the front door to your substantial investments in Instructables, and while some have found these changes disturbing, we believe that they're very much in the community's best interests. I wanted to reach out just to let you know that we have given the new design a great deal of thought and attention, and to share with you some of the reasons behind the changes. First, to clear up some ambiguity about the current state of affairs: The public member profile is stage one of two major changes to the site that will work together. Stage two, which is well underway but not released yet, involves the private profile page (currently the "you" page) and will make access to aspects of your presence on the site much more accessible. Full lists of your own content will soon be available on a full-featured (and much more beautiful) private view of the member page; meanwhile, this content is all available in the "you" section. So the sense that your own content has gone missing is temporary. Second, the High-Level Goals: Clearer, more accessible design. Our old member page, say what you will, had a lot of buttons and options. On the whole, we know that most people don't take the trouble to drill down into the various categories. We want to help you all build large audiences of new appreciators, and while an infinitely detailed catalog of an author's content is appropriate for some, the breadth of activity on Instructables can make it difficult for new users encountering the site for the first time to understand what Instructables is about. Fundamentally this is what the new design is for: to help people understand, at a glance, what a given author is up to on Instructables. Highlighting Engagement vs Cataloguing Activity. Different people interact with Instructables in different ways, but our member page has never reflected this subtlety. It has always presented the most recent Instructables and comments, even for authors who contribute exclusively to the forums, or through favoriting and following other users. We felt that your activity on Instructables should be presented front and center, because it more evenly describes the way in which you participate in the community. Many members participating in this very discussion have benefitted from this choice, even as they challenge it. Forum posts used to live buried under a tab on the left; now, the contribution of a forum topic can appear right at the top if that's how the author participates in the community. We wanted to see how authors engage, and we felt it was ultimately more important than being able to drill through every piece of historical content hierarchically. Audience vs Self. The old profile page served "my view of me" and "my audience's view of me" somewhat evenly. With the changes we've made, and the changes in the pipeline, we're taking a stance. The public page is for my audience, the private page is for me. We're confident the new design better serves authors' audiences, even if it has some weaknesses for the author's own view. The author-centric side is coming, please hang in there! Surfacing Older Content. At HQ, we have frequent discussions about the "evergreen-ness" of the Instructables authors post. A great project from 2009 is still a great project, even though the wider internet has a strong preference for "new" over "good". But it's a struggle for us: we can't put every good project on the homepage forever, or new projects wouldn't have a chance. So we have to strike a balance. The new member page helps in this regard: if your old-but-awesome project still gets some attention and activity, it'll show up in your timeline as people favoriting the old project. So your profile becomes a place of discovery, where I can see "whoa, look at that cool thing that this person made 3 years ago!". Previously, the old project would have been buried under several clicks from the landing page, generating almost zero traffic. Add to that the new ability to select "top projects", and you can see that we're trying to help you keep your best projects in the limelight. See new features below. Third, New Features to Help Authors: Top-Five Projects. DIY Projects are at the core of the Instructables experience, and we listened to authors who make different kinds of things, but want to treat their Instructables Profile like a Portfolio. Randofo is one of the community's best-known and prolific Arduino Gurus, but it's a fact that an Arduino Project of his is a much bigger time investment than some of his smaller food projects. In fact, did you know that he's authored 38 food projects? Now, randofo has the opportunity to present his most-relevant work first, rather than leaving it to his audience to figure out. Right now, he seems to be all about Halloween. Activity Feed. Love it or hate it, it's here to stay. We felt that having an activity feed on the member page was the most effective way to answer the most important question for a member page to answer: How does this member participate in the community? While that information was certainly available in the old layout, divining it required an audience member to click through all the tabs, reading every piece of content to completion. There was nothing "glanceable" about the information architecture, except perhaps the achievements (which we've kept). We believe that the activity feed, with the "top Instructables" feature in particular, makes it much easier to determine at a glance how a member participates. Fourth, It's a Living Document: We're watching your comments and feedback closely, and I expect that you'll see some pieces that you're missing return. I can't comment on specifics right now, but I know there are some statistics and counters that may have value. We agree, and we'll respond. But there was a whole lot of "extra" information on the page to begin with, and we wanted to start over as cleanly as possible. UX & Bugs. With a big feature like this, there are bound to be growing pains. Hopefully, you've already seen some improvement with regard to the delay in setting your "top Instructables" and having those reflected on your page. There's still a little blip, but it's down to about 10 seconds now, vs the 20 minutes when we first released it. Sorry about that! We'll also be looking carefully at how the page looks, making sure that we aggregate activity events such that no one event type (ahem, favorites!) takes over, etc. That's all for now. Hope having a little context helps put the changes in context. If it can't bring everyone onto the same page, we at least hope that it'll make them a little less out-of-the-blue. Thank you to you all who have written your comments, and who care so deeply for the community of Instructables!

Topic by pseaton   |  last reply


Power Point only works over remote assistance? Answered

One of our employees has a problem with pptx files in PowerPoint 2010. When  she opens her pptx file it only opens  the first slide and all the top tool bars in PowerPoint are grey and can’t be accessed. The steps I have taken are as follows: Installed the office 2007 compatibility pack although only some of the PowerPoint files were pptx. I tried open with Office 2007 but without success. I thought maybe it was created in Office 2007.   I have searched the web high and low for a solution for this and can’t find one single case with the same issues. I myself have never seen this before. The user is a local admin on her laptop. I have to add that there are no errors or warnings in event viewer. Has anyone seen anything like this?

Question by BjarniOddsson   |  last reply


What material can be used as a binder that would slowly dissolve in sea water?

There is an on-going problem in the fishing industry concerning bait in the crab fishery. Bait is becoming almost as expensive as crab. At the same time, there are by products in the seafood industry that are just being wasted that would fulfill the required needs if it could be combined with a sea water soluble material that could be adjusted to dissolve within set periods of time such as 3, 5 or 7 days. Anyone have any ideas? No soap or any material that would disturb the natural balance of the environment would work. 

Question by Oregonbythesea   |  last reply



flow code projects?

How can i find flowcode projects like 8channel programmable timer by eric

Question by dsimiyu   |  last reply


how do you make body armor?

How do you make ballistics Armour plates similar to plates used in the military for personal home protection. Is there a material I can purchase over the counter that would be light weight and have similar ballistics protection?

Question by    |  last reply



Instructables just to promote other websites?

I noticed that the amount of so called "video only" Instructables has reached annoying numbers. Might be alone with my opinion but when I check some of those Ibles just containing a single line of text and a video I fail to see the point. Further checking usually shows the video is advertised on many other sites in a similar way. Only goal is to get as much hits on Youtube and such, making money. IMHO Instructables is about making things but not about dumping single video files. If that is a goal for this website than at least these Instructables should be moved out of the normal area and into a video only section. And if someone simply posts videos only to promote his channel than it should be considered to remove those Instructables as I consider them advertising but not a real Instructable. What do you guys think?

Question by Downunder35m   |  last reply


The Pi Day Challenge Says "Judging ends midnight April 11, 2016"

What the heck?  Midnight April 11 has most definitely happened(judging by how it's April 12).  Can someone explain why it's...  Delayed?

Topic by nancyjohns   |  last reply


Contests are becoming too specialized

Lately I've been seeing more and more contests which require expensive, specialized tools (mostly 3D printers) in order for you to make something that is eligible. I wish we would have less of this type of contest, or at least have people utilize tools other than 3D printers. How about a milling/turning contest instead of endless 3D printing-related contests? I'm just worried that many of the contests are inaccessible to the average instructables user, and also getting a bit bored of contests which involve 3D printers.

Topic by TheNecromancer13   |  last reply


Stepdown from 19V to 12V using 3 IC for reduce the heat output?

Hey guys,  I want stepdown my charger laptop from 19V to 12V but I read from https://www.instructables.com/answers/19v-to-12v-without-current-drop/ they said IC produce excessive heat if I connect it directly, Then does by doing 3 stages of reduction, can reduce the heat output of the IC? For example I use 7818 > 7815 > 7812 for 3 stages of reduction.

Question by goldenyears1x   |  last reply


While compiling I get this error message from Arduino, does anyone know how to fix it?

Arduino: 1.8.2 (Windows 10), Board: "NodeMCU 0.9 (ESP-12 Module), 80 MHz, Serial, 115200, 4M (3M SPIFFS)" C:\Users\super\AppData\Local\Temp\Temp1_Wifi-Jammer-master (1).zip\Wifi-Jammer-master\WIFI Jammer\wifi jammer\esp8266_deauther-master\esp8266_deauther\esp8266_deauther.ino:11:18: fatal error: data.h: No such file or directory #include "data.h"                   ^ compilation terminated. exit status 1 Error compiling for board NodeMCU 0.9 (ESP-12 Module). This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences. I have my esp-2966 connected through a cable.

Question by mo.nicholas   |  last reply


remote control vehicle regulations (not drones, rather cars and boats) Answered

Hey everyone ! I'm designing an amphibious rc vehicle thats a wee bit bigger then most. I want to use mostly bike parts, a 500W drive motor and a 100W trolling motor.  Max out at 30kmh (18Mph)  not sure of the final weight it will not be used on a public road / highway  but will be used on public lakes. I've been trying to consult google but it's overwhelmed by drone regulations and I can't find anything useful. Any thoughts or links with some info? I live in british columbia, canada

Question by Wired_Mist   |  last reply


Connecting small generators in series?

Hi all,I'd like to make a bunch of small generators, like Pleech turbines, for example. Each one might only be producing a couple volts and however much power. What is the best way to connect them together to get their combined power?I was thinking that I could just give each generator its own rectifier, and then connect everything together in series. Would that be efficient?My circuitry understanding is a little limited, so a simple solution that is 90% efficient may be better than a complicated solution that's 100% efficient.... :)Thanks for any suggestions!

Topic by Asbestos   |  last reply


Fibre optic tree?

I want to run my Christmas fibre optic tree without the motor.  Would I have to alter anything, its lamp is 15w 12v?

Question by eileenlilley   |  last reply


How do I build a website from scratch?

I am trying to set up a website and not having very good luck with it. Any simple instructions? I am using a template, but every time I try to change text or pictures, I end up back at the same home page  and can't see how to make my different tabs open up to display details for each tab. Clueless....Any help would be great.?

Question by stillson6   |  last reply


Instructables Classes on iPad? iOS App Removed?

I've enrolled for a class and wanted to view it on my iPad (my preferred method for viewing video content). However, following any class link off the main site shows only a blank page. I went to the App store hoping to download the Instructables App I'd read about, but that seems to have been removed from the iOS store (at least in the US).  Is it impossible to use Instructable classes on the iPad? I'm on an iPad Air 2.

Question by montressor   |  last reply


Connection of VERY short nichrome wire? Answered

I have a VERY short piece of 32 gauge nichrome wire that I want to connect to 2 copper wires. When testing, I have connected them like on the picture, using tweezers and a pair of pliers. But I really need to find a more professional and durable way of doing it. It's important to keep as much as "free" nichrome wire as possible in the middle. I don't want to waste all the length inside a butt crimp, or wrapped around the copper wire. Is there a tiny, minitature terminal somewhere, that only steals 1-2 mm of the nichrome wire? Or am I wishing for something impossible?

Question by karolina81   |  last reply