How to connect my arduino uno to Internet to connect to MYSQL

Hi - I have arduino uno card which has a light sensor. I would want to transfer the light readings to MySQL database. How do I do it? I can write a sketch that can connect to MySQL and insert the data and upload the same to arduino card. But how will my ardino card connect to MySQL. Can you help me here as I am beginner to these topics? Regards, Harish

Topic by harishkompelh   |  last reply


ESP8266 + NRF24L01 + Arduino system?

Hi everyone, So, I'm pretty new to the esp8266, but have some experience with arduino (I'm certainly no master however). I'm working on a project that uses an esp8266 and a nrf24l01 radio module to transmit small packets of data to a 'base' module that is an arduino and another nrf24l01. I'm having some difficulties figuring out how to use the nrf24l01 with the esp8266, so I was wondering if anyone knows of any good libraries or tutorials or anything that might help me. I don't know any Lua at all, so it would need to run through the arduino ide, that's what I've used so far to program the esp8266. Any help at all would be greatly appreciated and I can try to answer any questions you might have. Oh, and it would be great if you could explain stuff in really simple terms, I'm still in highschool and don't have a very expansive technical vocabulary  :D Thank you  ~Dudes

Topic by dudes   |  last reply


Customized Hogwarts Letter

If anyone would like a customized Hogwarts Acceptance letter please email me at RunicGoods@yahoo.com or you can message me on facebook at   https://www.facebook.com/RunicGoods/ I will need: your name your location (i.e. City or state or address if you would like) and your wizard nickname 

Topic by RunicWarrior 


Help make a quacking noise in a wooden toy duck (mechanically, not electronically)

I'm in the process of recreating the LEGO wooden duck toy. I'm only working from a few images I've found online, however; I don't have an actual one to examine. On the originals, the axles operated a couple of mechanisms: the duck head pivots to open and close the beak, and there's a mechanism under the base (I'm assuming) that makes a quacking noise. I've got a pretty good idea how to create a simple cam for the head/beak movement, but I'm not sure how to generate a quacking noise mechanically. My online searches have proved fruitless. Does anyone happen to have one of these vintage LEGO ducks and is willing to snap and share some photos of the mechanisms? Or, does anyone have any good ideas how to make a quacking noise mechanically? My thoughts are a push/pull rod-type crank attached to an axle, but on the other end of the rod . . . not sure.

Topic by seamster   |  last reply


Cable remote control

Hi all I am interested in building a specialised tracked vehicle but instead of your "normal" remotes I would prefer a cable remote control that can at least use 12 or more functions. I actually look of building this in to a small Metal Case like you use for camera equipment with a monitor in the Lid and include the battery pack to power everything.  Anyone got any ideas of how to build such a remote and the outlay of the functions. I have some knowledge in electric and schematic. I do have a CTC 3D Printer with Dual Extruder but I only just got this one and have so far not used it as I want first to get the feel for it on how to work with it and look up a variety of videos on YouTube before I use this one in anger. I also do not yet have the Case as I am still bidding on one on eBay. I plan to start the build in September / October and be looking at the moment for a large (1/16 or larger) Tracked Vehicle Chassis. I once did see one in a Chinese Online Shop but cant find it again. I am sure that I bookmarked it but again, I cant find it. So I am looking over various online shops for a set but so far I had no success. If anyone has build something similar before please get in touch with me as this is my first real project that i would really love to pull of over the winter time to hopefully use next summer.

Topic by BernhardK4 


Possible project with 433Mhz RF Transmitter + Receiver Module Link Using multiple analog sensors

Is it possible to send multiple sensor readings via through a 433Mhz RF Transmitter + Receiver Module Link?..Meaning, assume that I have a three Flex sensors on the transmitter side and three servos on the receiver side. I have the project almost complete however I would like to make it wireless with these rf modules. When you bend a flex sensor its corresponding servo motor will turn depending on how far the sensor is bent. I do not know if this is possible using these modules since there are multiple flex sensors and they are analog (I'm not sure if analog is the correct term but what I mean is since the sensors will output an array of values I don't know if it will work since its not digital) If anyone knows if this is possible please let me know and also if you can I would need help with the code, I have never made anything wireless before but it seams really neat. Thanks to all those who reply!

Topic by Daniel Quintana   |  last reply


Greek and Italian

I speak Greek and Italian, if you need my help feel free to ask for it!

Topic by giorgia14   |  last reply


Floppy drive + Arduino = problem

Hello :D I am trying to read bits from floppy. For test I read only first bit on first track. Unfortunely I receive every time other state (11010001...). Program reads bit when index pin is LOW (FDD inform that disk did 360° spin). Please help :/ There is a help site (pseudo code): LINK

Topic by pokulan 


Why my answer/ comment to a question disappear?

I want to know why my comment disappear?, Thanks

Topic by ephtermulo   |  last reply


Problem viewing images

When I am on a instructable and try to view all the photos but it dose not work...I click on the mini image but nothing happens! I am using Firefox and some other people are experiencing the same problem!

Topic by iproberry1   |  last reply


Anti-gravity Machine concept

This is a concept I came up with for an idea of an anti-gravity machine.  Let me just state for the record... I do not think this will actually work.  However, while I am quite certain this idea should not work... based upon my limited knowledge of science... it would seem like it could work.  Unfortunately I know I am never going to spend the thousands if not millions of dollars to build this concept to find out. The basic premise of the idea is the use of angular momentum to overcome the force of gravity.  Imagine if you will, a gyroscope spinning at such a high velocity that its outward force overcomes the downward force of gravity.  Naturally, one of the big obstacles is generating the speeds necessary to create the velocity such that angular momentum is greater than downward force. What I essentially propose is a spinning ring that is propelled in the same way as a maglev train.  Using Electromagnetic propulsion or EMP to accelerate a ring in a vacuum by the utilization of a flowing electrical current and magnetic fields may in theory generate the speeds necessary for the force to overcome gravity.  Unfortunately, the power to run such a vehicle and the weight to power ratio are significant obstacles. Two of these rings above one another I theorize can create tremendous propulsion if the angles of the rings were changed.  Using hydrolics to change the angle of alignment of these two rings may create incredible forward momentum.  Once more, such a vehicle would not be limited to operation within Earth's atmosphere unlike jet or other propulsion mechanisms.  In fact, it should operate at peak efficiency in a zero gravitational environment. This is all theory... and I'd love to know if it is indeed as crazy as it sounds.

Topic by DarkRubyMoon   |  last reply


Featured posts on homepage

Do featured posts on the homepage vary from account to account? I noticed this was the case when I logged into my secondary account, the featured posts on the homepage were completely different from the ones that show up when I log in with my usual account.

Topic by SeamusFrederick   |  last reply


SADW BUG IN RECENT ANSWERS ==about== 3Y TO 5Y...... see u den

RECENT ancient answers topics that are 6 years and older. See me at  Jigidi on some leader boards. Keep your mind active until the Aussies perfect that cure for Alzheimer's....

Topic by iceng   |  last reply


My /you Page Is Riddled With Bugs

Yesterday I noticed my /you page has become riddled with bugs. The patch indicators all read 0 despite each having had some value besides 0 beforehand The subscriber count reads only "one" when the actual number is ~1420 or so. None of this has done me any harm, but I figured I'd pass it along anyway.

Topic by OrigamiAirEnforcer   |  last reply


Spa Controller Modification utilising Microcontroller Remote Station

Hi All, I'm looking at modifying our existing Spa controls with a Touch screen system that combines the functionality of the radio remote for the Spa controller & the remote control panel for the Spa heater. I also want it to be able to run the Sonos software and possibly do lighting control down the track. I would like to leave the existing water proof remote operational if possible but that assumes I can get the new 434MHz module in the microcontroller talking to the existing Rx in the Spa Controller and dont have to replace it. Im interested in any comments particularly as which mini computer to use. Price is a concern of course by function is more important. I havent worked out how to power it yet as there is no easy solution without nearby power points or network ports for PoE. I may perhaps go solar but not sure yet. It may be easier to run a cable for somewhere. Any insights much appreciated...

Topic by BrettB55 


Transistor Trouble

Hi there, I have been working on controlling a large toy car with a wireless receiver from a smaller toy car, the motors I need to control are rated for 9V but the receiver only outputs 3V, reversing polarity to reverse the motor. I made this schematic using transistors to handle the voltage, but when I built the circuit the transistors began to heat up and there was no output. I am not sure why this is happening, so any help would be greatly appreciated. Thanks, Daniel

Topic by daniel12354   |  last reply


Lighthouse pulsing light

Hi all - I am building a wooden model lighthouse, it will stand 5 feet tall and become my driveway landmark. I have been searching for a good light circuit, a non-LED version, preferably using 120v AC. I would like the light to just do a slow flash or pulse and haven't found a circuit anywhere. I did find one SCR simple circuit using a high rated capacitor, but I am looking for more options. I have a coloured halogen which should do the job well enough. So have any of you brainiacs come across any circuits close to this description - thank you for reading / responding. Bill

Topic by bstacy37   |  last reply


possible bug after changing email on mobile app

Ok, so I finally changed my account to use my primary email account. While the mobile app (on Android 5.1.1) was also configured with the secondary email and used most extensively. I did the usual change email link on the desktop browser, updated the email from secondary to my primary email account. Went back to the mobile app, it was stuck in between nowhere already. After reopening the app the screen took me back to login screen showing password incorrect. I somehow am not able to update or change the pre filled secondary email with my new primary email address. Not even after clearing the app cache, data etc. Finally had to uninstall and reinstall the app to make it work. Is this a one off case, or just me? Bug otherwise!

Topic by netahoy 


Selection of presence sensor

Hi guys. For one of my university projects I need to detect the presence of a person in the shower. In order to do that what I have in mind is use a proximity sensor. If the target is in a distance range (let's say 20 to 50 cm) It will assume that the person is in the shower when the distance measure is no longer in this range then it will mean that the person left the shower. I need to detect all the time of the person in the shower (meaning when he/she gets in and then out). I have read a lot of info and forums to properly choose the type of sensor. However I still don't have a clear answer. About the Ultrasonic proximity sensors I know that they are cheap and more accurate by it can be affected by Temperature, humidity and some ambient noise, all of them which happen in a shower. The other option an Infrared one gets affected by lightning conditions and the surface of the target. The last option I checked is a PIR sensor I know it senses Temperature of the target, but I don't know if it will be affected by the running hot water and also is more expensive. In general, I don't know how the running hot water will affect the detection of the person in shower. Also,so again I don't know how this will work. Sorry for the huge amount of  questions, I am a little bit confuse with all the factors to have in mind. I am hoping someone out there can help a lost newbie like me and give me a suggestion. Thanks a lot :)

Topic by mcamiea   |  last reply


Raspberry Pi 3 Vs UDOO Neo

Which is a better development board, in terms of automation, robotic and server function?  I plan to build a mobile-operated generic wireless controller that gathered data and also programmable in terms of control. I already drop by to other forums and still undecided. I don't consider a development board that so powerful. What I consider is the practicality, suitability, and compatibility. I appreciate your response and I want to know your ideas about this! Thanks and God bless!

Topic by ephtermulo 


String experts please help!

First time poster sorry if do something incorrectly! Anyone who knows a great deal about string I need some help! It needs to have certain qualities. 1.  <5mm diameter. 2. Does not stretch. 3. Can be compressed to a smaller diameter. 4. Returns to size when decompressed. 5. Maintains shape after repeated compression/decompression. I am currently using oval shoelace which works perfectly save for one flaw, after a short time it "breaks in" and loses its sponginess, no longer returning to it's normal size if compressed then decompressed. The compression comes from two parallel lines of shoelace being twisted together until wound tightly then untwisted fully and re-twisted in the opposite direction, this process will continue through the life of the device. The shoelace starts excellently but then quickly degrades over time. I need to accomplish the same effect with no degradation of the sponginess of the string, or greatly reduced. Any method or material suggestions are greatly appreciated! 

Topic by saronson   |  last reply


"Boy's Life" Archives

 http://boyslife.org/wayback/ I most remember "scouts in action" these were cautionary tales, as well as how to get yourself or a stranger out of a tight spot. They seem to be about page 45 to 65. Common topics: "trapped in quicksand" or " when the cave collapsed" or "the chemistry set explosive went off in his hand!!" But there was so much more, like how to make stuff with sticks, rope and knots. So much of my kidhood was howto based on scout stuff. I'm tryin to figure out how to paste  pics from the mag at the above link.

Topic by Toga_Dan 


Exploding color pigments - need ideas to make

Hello everyone, I am working on a film project and I need to make small explosions of colored pigments and/or powder. Below is a link to a few sample photos of the affect that I am trying to achieve. http://photogrvphy.com/pedro-aguilar-bang/ I have tried many different techniques from impact to compressed air. But I am not getting the shapes that I am looking for. I am thinking  that the best technique might be some sort of controlled explosion. This could be something detonated within a pile of the powder or potentially (and more complicated) and fully concealed shell that includes the powder. I will primarily be shooting straight down above the powder so it really only needs to explode up and out. And again, these are relatively small blasts. I would estimate the powder blasts in the images from the link are only approximately 2' in width at the most. And help would be greatly appreciated!

Topic by jedikremer   |  last reply


The collaboration experiment

For my, or should I say our next Instructable I want to do a little experiment. The goal is to make a colaborated Instructable with the following rules in place: We each do a single step in the Instructable (excluding the materials step). Materials needed for each single step cost less then € 10 / $ 10. Tools needed for each step should be in most peoples shed (or their neighbours shed), you get the point: no big cnc'ing, lasercutting, wood milling, ...  Quality of step description, photo-work, ... should be feature worthy.  You get 1 week for each step, allowing for some trial and error, time for personal life, ... If technical constraints require more time, exceptions are possible after clear communication.  The concept is to do both the build, and collaborate further on the previous step, back and forth. No communication about the end goal. The project can go in all directions. Iterations continue until we both think that the end point is reached. At that point the Ible will be finished, an introduction and conclusions written and published.   I'm open for suggestions on improving the rules of the collaboration experiment, but I'm very keen on trying out this kind of experiment. I am only able to do one experiment at a time in this point in time. So if multiple people are interested, I suggest we make multiple couples and see where we go from there.  Who is willing to commit to this kind of experiment across time-zones, boundaries, crafts and expertises? It will be a challenge to get out of your comfort zone, explore new techniques and who knows what else? On spot left to join the experiment, please fill in this registration form. 5 of us already started the discussion on the rules and timing. The general concept is to start November 1th and finish by December 20th, in time for winter holidays.

Topic by thijsv   |  last reply


Instructable images on another site

I noticed a spike in youtube views the other day.  Based on YouTube analytics, the views were coming from a buzzfil.net site out of France. I went to the site and notice that  the images and new text (love google translate) were pulled off one of my instructables and placed on that site.  There is no credit (or link) given to instructables.  In addition, the adsense revenue was zero since the banner ads don't show up.   Here is the original: Part 1: https://www.instructables.com/id/Planter-Box-from-Pallets/ Part 2: https://www.instructables.com/id/Hanging-Basket-Column/ Buzzfil Version http://buzzfil.net/article/11630/c-mignon,non-classe/il-ne-savait-pas-trop-quoi-faire-avec-ses-palettes-en-bois-mais-son-idee-est-hyper-genial-9.html Is this pretty common?

Topic by mtairymd   |  last reply


(POSTED) Decorative K'NEX Toothbrush Holder With Rotating Display Stand; Should I Post? (POSTED)

Here is my latest project: a decorative K'NEX toothbrush holder with a rotating display stand, powered by a Tethered Power Pack Motor. It can hold up to four toothbrushes, is very simple to make, and (in my opinion) looks very nice. Should I post instructions for this? Please leave your opinion in a comment below. Thanks! Update: This idea has been posted. You can view it here.

Topic by The Knex Inventor   |  last reply


Bugs: Ordered List Malfunction

I'm just regularly typing and use ordered list then it malfunction, as if the cursor doesn't locate to '1' and cannot be deleted. 1.) Windows 8.1 Pro 2.) Google Chrome 3.) https://www.instructables.com/editInstructable/edit/E7YZME5IR5MV53U/step/1 4.) Added Screen Shots 5.) It happens in repetitive use of Ordered List

Topic by ephtermulo 


Homebrew contest ?

Hi, Is the Homebrew contest for drinks only, or also home-brew equipment ? At some point it had some brew equipment as a main image, and there are also a few equipment entries as well. Thank you,

Topic by KronBjorn   |  last reply


Missing "Next" Button in Inbox

Am I crazy or is the "next" button missing? 

Topic by Brooklyntonia   |  last reply


Speed controlled industrial fan

Hi all, For an installation I need a speed controlled fan that I can control via a microcontroller. Is there any industrial fan that you know that allow to be controlled with eletrical signals rather than the usual manual control? thanks a lot!

Topic by amicoleo   |  last reply


Old UPS transformers: Any uses?

Does anyone know of a use for those massive transformers found in dead UPS's? Please don't post replies that include "door stop" or "recycle them" because those are obvious replies when you have no answer to my question. *SMILE* I have not tried but if the "secondary" for those that is the 110v output to the plugs were hooked to 110, do the original primaries become low voltage ac secondaries? (~12v) I have accumulated about 6 of these and would like to find an electronic use for them before resorting to recycle.  I have no doors that need propped open. Thanks.

Topic by stuffdone   |  last reply


running a camera and wireless station from batteries

Im thinking of setting up cameras away from my house and need advice on the power. basically they will be mounted on poles down fields from the house. what i plan on having is a network camera setup with the Ubiquiti wireless points (https://www.ubnt.com/airmax/nanostationm/). these will form a bridge of 2 or 3 cameras and the cameras will be connected to each, with one of the wireless points mounted on the top of the house to connect to.  what i cant figure out is the power. i would like to run a power cable down the field sometime but this will be costly and i want to try this out to make sure it works. i know deep cycle batteries would be best but i cant join the rest together. i know there will be a POE connecting into the wireless box and this will be split, so how would i join this to the battery, as would a converter be needed or any other suggestions would help. thanks!

Topic by ChrisD319   |  last reply


Wireless Dog Fence

Would love to have an instructable on how to make your own wireless dog fence.  Maybe 300 feet range.  

Topic by terdallaujar   |  last reply


FOOD PROCESSOR HACK

Can i cut a hole in the side of my food processor bucket………. IF YOU KNOW RE CUTTING PLASTIC YOU WILL HELP ME LOTS essentually i use it for slicing a crap load of veges and ideally i would like to make a hole in side of the 3.4l plastic bucket/container so when its full i can slide my hand in and remove the carrot etc………. I DONT need to keep vege in there when cutting in fact if they came straight out the whole its benifit the blade/spinning/sharp thing is at the top near where u put in the vege so no risks of getting cut see image http://imageshack.com/a/img923/182/JNuvrh.png

Topic by peter.wilding.988   |  last reply


composter made of igloo drink cooler

I had this idea for a cheap, easy composter, using an igloo type drink cooler. (considering purchase for this purpose) I think it just needs ventilation and straps to hold on the lid when mixing. (have these already) Anything else needed?

Topic by pinkrenegades   |  last reply


Passive mixers, I don't undertand why the resistor/capacitor

Hi, when I was young, our teacher show us a passive mixer, each input had only one green capacitor in series for each input, it was not electrolytic but ceramic or polyester, it sounded so good for just being there 1 simple component per channel. Now taking a look at google, can see that the most passive mixers, uses resistors to isolate sources, with values since 10k to even 100K. Other schematics shows a resistor and capacitor in series (see image below) what does that capacitor? and why some schematics only has a simple resistor? is it easy to calculate its ohm value?. Is it better using this configuration supposing that the source is weak (coming from cellphone 3.5 mini jack or RCA) and this mixer targets the signals to a pre amp? So I need to from weak sources like iphone, dvd, any RCA output, etc... anybody know whats the best to use in this case? Thanks so much. Should I put a resistor as minimum as possible? I undertstand that a resistor there, in the input, will reduce the volume input, and I dont want to do that, so can I simple connect everything direct? or the resistor isolates the inputs, otherwise it will sound ugly? I am very confused, why the resistor? why I have seen resistors from some ohms to 2km and even a lot more, 50k, 100k. I want to mix two weak sources, as a signal coming from a walkman and cd player, or cell phone, etc, so whats the law for not reduce signal intensity and mix everything well? all channels will come in into a pre amp IC.

Topic by destrip   |  last reply


Paper quilling machine

Hi! I found this machine for paper quilling (a craft I love to do) and I wonder if someone could make something alike.https://www.facebook.com/home.php#/video/video.php?v=1141070649214&ref;=nfHope you can access the video in Facebook.

Topic by Tranquilita   |  last reply


Contests Are Rewarding Unoriginality, Threatening Creativity

It is truly a shame that judgments in our contests have again been made which serve to promote rehash and discourage creativity. After having watched the Make It Fly! contest make this mistake last month, I could only shake my head as the DIY Summer Camp Challenge also fumbled the ball and awarded a prize to an unoriginal post. Once again, unoriginal projects have landed in the winners' circle while new creations have been left to flounder. On a site that prides itself on people doing things for themselves, this is cause for alarm. Posting someone else's creations under your own name is not doing it yourself. It's high time that that be acknowledged and it be discouraged. Rewarding unoriginal projects is not an avenue to promoting new ideas, developments or breakthroughs. On the contrary, this approach provides an incentive and a compelling case to not pursue new ideas.  Instructables' successes are based on its being a center for new ideas, not old hat. Nevertheless, we are teetering dangerously toward that point with moves like this. Rehashes' qualifications are questionable The statements made in the commentary for the contests--the language of the competitions themselves--speak a resounding "no" against unoriginal content. In the header for the DIY Summer Camp Challenge, it is asked: "What interesting things can you do or make to keep the kids entertained this summer? [...] Share your games, activities, craft projects, and more." In the header for the Make It Fly Contest 2016, the opportunity is given for: "Three, two, one… ignition and lift off! The Make It Fly Contest has taken off and that gives you the perfect excuse to let your creativity take to the skies." There is nothing indistinct about the terms. They clearly outline the project is to be your own, not someone else's. If you are reposting another person's creation, you are upholding neither the contests' specifications nor spirit. In the standard contest terms for each contest, the judgment criteria is given: "Judging. All entries that are in compliance with all terms and conditions of these Rules will be judged on the basis of the following criteria (the "Criteria"): clarity, ingenuity, creativity, quality of presentation, and execution of the Instructable." Rehashed projects which contain contents from others' makings are neither ingenious nor creative. As a result, they ought to receive the minimum score in the sections of ingenuity and creativity if they are not barred from the competitions outright. What this means for makers now: Speaking in reference to how I had handled the contests myself, I spent several weeks perfecting several entries of my own. One of the projects, entered into only the DIY Summer Camp Challenge, was the result of many months' worth of development and refinement. The news that my efforts in those months were all for naught while similar themed but wholly unoriginal projects were selected as winners only served to tell me one thing: the time I spent developing and fine tuning the new projects was all for naught. Currently, the appeal for a person to set their best DIY foot forward and actually do something for themselves has become troublingly shaky. There is now a track record of rehashed projects taking home prizes while other original projects have faced ignominous defeats. There is a precedent to unoriginal trumping original. With rehash supported and honored, it is now reasonable for users to conclude that creativity is neither valued nor worth its costs and that unoriginal copying is a better way of doing things. This could ultimately promote a worsening spiral of disinterest in, apathy toward, and the stagnation of new developments in the numerous fields of endeavor makers strive to go forth in. The chances at falling into this trend draw increasingly close and they cannot be allowed to continue if we wish to see progress. Where we need to go from here: Creativeness must be shown to be valued by Instructables or makers are not likely to pursue it in future competitions. As I did a year ago, I recommend the Instructables staff and judges: Judge unoriginal projects as such and give them the earned low marks for ingenuity and creativity based on their lacking in both regards (if they are even legally fit to continue on in the competition) Not promote unoriginal designs by featuring them Reposting old things is a slide to the past, not a ladder to the future. Makers must act today to make a better, more creative tomorrow and copying is no way to do that.

Topic by OrigamiAirEnforcer   |  last reply


Led Pool Lights How/Ideas???

I want to make some underwater LED lights. Any ideas on DIY? thanks

Topic by R4fo   |  last reply


I would like advice on pruning - topiary

Hello, I would like some pruning advice.  I have an established azalea growing around a statue.  I have been trying to train it into a grotto shape for three years.  As you can see from the photo, I am having a challenge getting the vertical part in the back.  It's very sparse and leggy.    Where should I prune it to make the back fuller and taller? I'm looking forward to your replies.

Topic by lgooms 


*click* random instructable, *click* randome instructable like reddit

Is there a hidden button or something one of the programmers have to do to have a random instructable? Like the random button on reddit.

Topic by unbottled19208306   |  last reply


Induction heater 2.0

Some might have already tried my first induction heater, which was more a proof of concept than a modern device. Although I like to keep things simple where possible I want to upgrade my heater to a fully electronic version running on mains power. This time the base concept is to use a cheap induction cooktop for the control and power source. After using a few already as a communication device I realised it is a costly way of producing smoke signs but I am getting on the right track with the design now. So my obvious questions are: 1. Did actually anyone ever built my current induction heater and if so, can you provide some nice pics? 2. If you were interested in a hobby induction heater, what would like to do with it?     E.g: Just for curiosity on how it works, heat treatment of punches, chisels and similar,     heat treating knifes or even swords, sheet metal work.... 3. What would like to have included?     E.g: Water cooling for continous use, air cooling (mostly for smaller and quick jobs), exchangable coils,     additional micro controller for temp, water and remote control (foot panel or similar)... 4. Do you require a fully shielded version to avoid interference? 5. If you are based in AU (preferable VIC): Would you be able to donate me faulty (partially or fully) or working induction cooktops,     for example discarded units with broken glass tops?     Would you able to donate me copper tubing OD8mm or less? Leftovers from pluming installations, old LPS systems or similar?     Prefered lenght 1m or longer as the coils need quite a few turns... :(     Each donor will of course be listed in the Instructable unless you prefer to remain unnamed. Let me know what you think because this time I am not just building for myself, this time it is for you!

Topic by Downunder35m   |  last reply


arrow back stop

Anybody have any ideas about inexpensive fabrics that might stop arrows? i have seen arrow back stop netting online but it is prohibitively expensive. i am a back yard archer living in a city and i think my neighbors would feel safer in their yards if they thought my net might stop an arrow.

Topic by evilife   |  last reply


Wanted: Working Electronics

Wanted: Unwanted Free Working Electronics. Thanks- Jadyn 

Topic by Jadyn Langer   |  last reply


do it yourself 4 wheel adult sized pedal bike car

In spring I got idea to build a 4 wheel pedal car for my son. To use wheels from old bicycles, to make it as small and light and simple as possible and to make it possible to fit even an adult person. I was really disapointed surfing internet, as I found almost no free ideas, plans or experiences how to do it. It is no nuclear science, people would invest millions in their know-how, so they would need to hide it! Now it's autumn now and our car is done. I decided to share my experiences and detailed photos as free plans with other people, interested in self buliding pedal car of that kind. I wanted my 9 years old son to learn basics of construction and working with metal and wood. He did almost all hand works by himself and he is very proud on it. It is a very good way to move your child from TV and computer games! It is all on our 4 wheel pedal bike car web site

Topic by teospiller   |  last reply


suggestions for retrofitting a late1970's portble cassette player/radio

Hi, I was given a late1970's portble cassette player/radio. the electronics are dead. but the body is in very good condition. It would be cool to retrofit it as a portable amp to connect to my phone or mp3 player I want to disembowel the machine and then fill it with an amp and lithium ion battery pack. it's a bit larger than a 6 pack of beer can any point me in the direction of some instructables or sites with some info? I'm thinking of buying a small amp kit from aliexpress. thanks

Topic by altomic   |  last reply


Who Stole my Pokémon GO name??

I tried scoochmaroo, scooch, and even scoochie (which I find less favorable) — no luck. Who else in the world would call themselves scoochmaroo? And what should I call myself now? In other news, what level are you on? Have you been reading all the crazy news about it? One guy's house was tagged as a gym and people are lingering outside to train at all hours! What's the funniest thing you've encountered so far? 

Topic by scoochmaroo   |  last reply


123D Design tutorial for technical parts with accurate dimensions?

I'm an engineer with ~7 years of experience using Solidworks (professional CAD software). After hearing about Autodesk 123D Design here on Instructables, I tried to start using it to design and print things with my home 3D printer. However, I'm initially finding it very frustrating to use (more detail on that in a minute) - and I'm not sure if this is just because I'm stuck in my ways with the software I'm used to, or if I'm just trying to use 123D for something it wasn't really intended for. To try and give some concrete examples - I understand that you can create 3D shape primitives (rectangular prisms, cylinders etc) and assign them dimensions when you create them. I also understand that you can create 2D sketch objects and define their dimensions. What I don't find intuitive at all is how you can assign the dimensions of objects relative to each other. For example, say I want to make a 10x10x1mm bracket, with two 2mm diameter circular holes that have their positions on the face defined by the distance from their centers to the edge of the bracket. In a parametric CAD program, that is very easy to do in a 2D sketch and then extrude to a 3D solid. In 123D, I understand that I can create a rectangle primitive and then put holes in it using cylinder primitives - but it seems impossible to define the exact location of those cylinders relative to the edges of the rectangle; also impossible to create a sketch with two circles in it and a dimension defining the distance between their centers. To give another concrete example: at the 4:20 mark in this video (from this Instructable), he draws a circle on top of an existing rectangular part, and then "centers" it by just dragging it around freehand and eyeballing it. Would it be possible to define the center of that circle relative to an edge, corner, or center of that existing rectangle? Or can 123D just not do that? What I'd like to see, if anyone is up for it, is a step-by-step tutorial (preferably in video format) for making some sort of "technical" part where the dimensions matter and it isn't sufficient to just eyeball it and drag things around. e.g. a bracket like this (exact dimensions don't have to be what I drew here, but you get the idea). All of the tutorials I've seen so far - including the official Autodesk ones - seem to just focus on eyeballing it/free-handing dragging parts around.

Topic by Ben Finio   |  last reply


Batteries Are Expensive, Who is using both Solar and hydro/ wind turbines at same time?

Hello, Let us use "Solar, Wind, and Hydro" all at same time. I am working on development projects in Togo, West Africa, I have a room there by the year in two locations. The solar panels are cheap enough, but for the cost of one good size battery I could build a wind or hydro generator. I do not see many setups where solar during the day, coupled with water and / or wind at night. Obviously harnessing the water from a river is the most stable. If seems sort of short sighted to only use solar, why not do all three, Solar, Wind, and Hydro at the same time, and slow the need to store electricity, because in my opinion, the batteries are the problem, the big problem. Thank you, Andy Lee Graham hhttp://www.hobotraveler.com/blogger.html https://www.gofundme.com/andy-hobotraveler

Topic by hobotraveler   |  last reply


Is the Makerspace Contest Effecting 'Ible Featured Times?

I was just curious if the Makerspace contest is effecting the time it takes to get your 'ible featured? And if so, by how many days? For example, my last featured 'ible wasn't featured for a few days after posting (and I didn't post it over a weekend or holiday or anything). Usually, the featuring (if it happens) happens much sooner. But I was just thinking maybe the Makerspace contest is effecting the times because there are so many more instructables getting published right now (some of the prizes in the contest are for highest number of instructables published and highest number of featured 'ibles).  Your thoughts? Has anyone else experienced this, too? Thanks!

Topic by Meglymoo87   |  last reply