Why my servo doesn´t work?

Hi, I have tried this project :https://www.instructables.com/id/Control-Servo-Wit... , about controlling servo with headphone´s jack, I just bought 2 servos TowerPro SG90 and when I tried both, none worked. Firstly I tried it with a 3,7V battery, then with a USB (5V), later with a 5.2V battery and finally I put the same as the tutorial (9V) but it didn´t work. I tried with the audios provided in the tutorial and I did new ones with audacity, with 1000hz frec 1ms duration (clockwise) and 500hz 2ms duration(counterclockwise), coping and paste every 20ms until completing 2 sec, but it didnt do anything. I want to know if I am doing something wrong or the servos are just broken (newly purchased).I edit, I just realized that if I apply 5V on the signal wire, it moves, is that because it is broken?Thanks for the help!

Question by pacomurso 4 months ago


Why?: Contest, Finalists, OAE, and... WHAT?

EDIT: This has turned out to be a really long post. Please see the top comment if you don't want to read everything, or if you aren't a scanner (seriously...). I did my best to stop my longforumtopicisitis disease... I don't really know how to write this "topic". I know I'm not the only one that's a bit upset about it. I'll do my best to keep it short, but if you might get pretty confused if you don't read (almost) everything. I would really like to hear your 100% HONEST opinion. I am looking for criticism. Don't worry if your response sounds harsh. Thank you. ------------------------------------------------------------------------ Instructables member OAE has posted several forum topics about contest winners in the past months. I understand the fact that he is annoyed some Instructables that win in contests aren't original, aren't documented very well, and lack pictures. It does bug me a bit when these types of Instructables win, but I guess that there's normally a reason for that, since most contests don't lack entries... He also mentioned the fact that he was pretty annoyed about the fact that he doesn't win. I DO NOT want to insult him in any way, but even though his Instructables are fairly well documented, I wouldn't expect for one of his Instructables to be a finalist. Brooklyntonia wrote that "A paper airplane on a cutting mat doesn't scream click and vote.", and I agree. However, I seem to have the same (I think) problem with my Instructables, and I think that it has  just gotten a bit too much. I've won in 3 contest with 86 I'bles (think of that as 50, if you know what I mean...), which is why I feel a bit weird for "complaining". It's not that I publish Instructables just for winning in contests. Far from that. SOOOOOOOO MANY times in the past year, I have posted an Instructable that I was absolutely positive that would win in a contest, but it wasn't even a runner up! I have SO MANY! It would take me an hour to post half of them, but here are some: Articulating 70W Spectrum-Balanced LED Panel for the Lamps & Lighting Contest How to Make a Wooden 6" Bench-Vise for the Wood Contest The Flat-Pack Bandsaw for the Flat-Pack Contest (less than the others, though...) How to Build a Wooden Drill-Press Vise for the Hand-tools Only Contest 9 Unusual Tool Storage Methods for Your Workshop for the Living without Closets Contest Make Your Own Plywood Mallet! for the Plywood Contest World's Most Over-Engineered 14-in-1 Soldering Station! for the Leftovers Contest Please correct me if I'm wrong: These Instructable are featured, well documented, meet the contests requirements, contain well lit high quality photos, are original (90%, of course...). I "politely encourage" people to vote only in an Instructable that I think will win... I would understand not winning at all once or twice, but not even being a runner up even once? WHAT am I doing SO HORRIBLY WRONG? What discourages me even more is that even though I want to build something that I really need, I will wait for months until a contest opens, start making, spend a ton of time on the Instructable, and then I realise that I waited for so long, and my I'ble hasn't even won! Benne, however, even though we both publish somehow similar content, has mastered this somehow! If I make something, I have to type up the Instructable immediately, because my short term memory is pretty bad. I wrote about this a bit here. If I calm the excitement down, I might be able not to publish it right away, but that will just discourage me, since I will feel that I haven't accomplished anything (aka positive feedback, etc...). Then after waiting several months, I will publish the I'ble and still not win? Imagine your boss, at work, saying "Okay (your name), you've spent 10 hours working, but I'm going to pay you only next year. Oh, nevermind, we're having budget cuts. I'm not going to pay you at all" Wait, WHAT? WHY? I'm making this sound as if it's a bet, which is okay since you don't get "paid" from Instructables, but never getting anything at all is annoying. Also, publishing Instructables is not extremely addicting (A REAL one... ;)  I think I am following the contest guidelines, but not winning again, and again... Why? Is there something that I don't know? Thank you for reading!

Topic by Yonatan24 2 years ago  |  last reply 2 years ago


I wrote and published an instructable, but it didn't show up, and then dissapeared!

I wrote and published an instructable, but it doesn't show up in the search or recent instructables feed. Why not? It is a public domain licence, and is called "make a milk jug explosion". www.instructables.com/id/Make-a-milk-jug-explosion It now says that I deleted it, which definitely isn't true.

Topic by Biopyro 10 years ago  |  last reply 10 years ago


Pdf export breaks special characters - in my case for Czech language

The PDF export is a great feature. I experienced a bug in text encoding with Czech language. When special characters like: č ě š č ř ž ý á  got displayed badly (as few other characters) in the pdf while on the web they look ok. Would be really great to see this fixed since i want to do my Instructables bi-lingual. thanks: this is a link to my instructable that causes problems. https://www.instructables.com/id/Upload-new-software-to-Trinity-using-Arduino-Jak-n/ and link to pdf itself: https://dl.dropboxusercontent.com/u/34763329/Upload-new-software-to-Trinity-using-Arduino-Jak-n.pdf i am using chrome on OSX 10.7.5 keep up great work. Václav and btw. the new file uploader didn`t work to attach the pdf - so i tried the old one and now I don`t see whether the pdf is attached or not - thats why i attached the dropbox link

Topic by bastl-instruments 5 years ago  |  last reply 5 years ago


Flippin Open Source Rant

I'm hate open source today!! It started out so easy, too. Download a free script based avi editor called Avisynth? Ok. Try to save the output of your newly edited avi file? Who the bleep knows how? Well, try to install a plugin instead. Download and stick in the plugins folder. Doesn't work. Scrounge around forums looking for a quick answer. Nothing. I read in the readme file somewhere that I need to download a C++ API to get a certain plugin working. OK, go to the website for the API. There's a cryptic list of file names with no descriptions. I pick one at random and download that. Wrong one. I pick a different one. Seems to be the right one. Good. Oh wait, the readme for the plugin says I need to download GCC and run the file to compile the stupid plugin. WHY THE FLIPPIN CRAP DIDN"T YOU FETCHIN POST THE STUPID BINARY!?!?! Get frustrated. Rant here. I really feel like cussing. Stupid GPL. A gazillion versions of open software posted all the time, all on the same page with mountains of text to read through just to try and find which version you need for your OS. Stupid Programmers. Don't know the purpose of a good user interface if it hit them in their blocky heads. AND THEN YOU HAVE TO DOWNLOAD A FRIGGIN COMPILER TO COMPILE THE CRAP YOU JUST DOWNLOADED--THEN FIGURE OUT HOW THE COMPILER WORKS--THEN FIND OUT THE LATEST VERSION OF THE COMPILER HAS A BUG THAT PREVENTS THE stupid thing from compiling. Does every open source programmer assume everyone that uses their stuff is a software engineer? I GUESS SO! AHHHHHHHHH! Linux will never beat windows. Stupid OS. I'm going to buy a freakin MAC with OS X. Then I can run my darn batch files from a terminal AND have a frickin stable GUI. Oh wait, I'd have to sell some blood plasma to afford a frickin' Mac. Great. Can't even run a useful batch file under Windows. Back to the GPL crap and Linux. *sigh* I should have bought Quicktime Pro months ago . . . or killed a rich uncle and inherited his fortune so I could buy programs that work and pay someone to maintain them on my system.

Topic by royalestel 12 years ago  |  last reply 12 years ago


Outdoor RGB LED Strip Failure

Hi all,  I've had quite a modest installation of RGB LED tape (45 meters ish, split into more manageable circuits) around the perimeter of my decking. This uses the commonly available 5050 RGB LED Strip light, the type with the epoxy covering the tape and also an outer sheath to protect it from water ingress.  I had heat shrinked the ends and also applied multiple layers of liquid electrical tape where a connection to a 4-core cable was needed. This has held up well for some time.  After about 2 years, I noticed that some of my RGB LED tape runs were sort of 'corrupting' where a small amount of moisture had got in, and shorted the RGB channels so that no matter what I feed into the tape, it always output white (or some other combinations or colours). Still, I ignored this, as it didn;t bother me too much.  These ran back to a central controller, which did the DMX control and amplification of the 12v single.  Anyway, to cut a long story short: Yesterday I smelt smoke.  I was walking around the garden and I noticed that one of the strips had caught fire, at a single point in the middle, and was burning a hole through my decking!  Again, long story cut short, I put this fire out and looked closer. The strip was so badly burnt that I can't determine what went wrong here.  I'm thinking maybe a resistor burnt out and caught fire? The tape has been running 'on' for quite some time (weeks) so this is a possibility.  Another possibility is that there could have been a short between 12v and ground, which caused heat. Now, there aren't any fuses on the 12v rail (fuse and circuit breaker protecting the 240v side) but I wouldn't have thought that this would protect me from a fire anyway!  I'm interested whether anyone else has had a similar experience or has any suggestions as to why this has happened.  I love these RGB LED strips, use them a lot in my house, but after seeing this, I'm not a little more dubious to keep using them.  I'm an electrical engineer (in the making, at University) and this has stumped me!  Thanks Joe

Topic by joearkay 2 years ago  |  last reply 2 years ago