Change in Membership plan

I accidentally purchased an expensive membership plan! Can anyone please help me to get me transferred to a cheaper membership??? Please help i really need this money!! 

Topic by SarjitT   |  last reply


How to change the title image of a draft instructable

Hi, i'm unable to change the title image of a draft instructable, the one that is shown when i click on my profile - Draft Instructables page. any help very much appreciated cheers juergen

Topic by nebulx   |  last reply


Help picking DC on/off switches

I'm in the process of trying to build a battery powered trailer mounted speaker system and i've got nearly all the parts now except for power switches. I didn't think i'd have a problem with choosing some but after searching around the vast majority of switches seem to be rated for AC or 12 or 24VDC and the absolute highest DC rating i've found so far is 28V, the problem is that the highest voltage i'm using is a little under 36VDC so where do i find appropriate switches? I've been getting helpful advice about the speaker project from someone on a forum called SpeakerPlans but they seem to think that i'd be fine using an on/off switch rated at 5A 12VDC despite the higher voltage requirements of my amplifier, i'm not very electronics literate but this doesn't make sense to me and i'm a bit worried about pushing too high a voltage through the switch and perhaps causing a fire or something. I would prefer a rotary switch if possible as i used one on my old 12V speaker and i found that it's a lot less likely to catch on clothes and bodies and break or accidentally turn on while the speaker is being manhandled/transported about. I have 2 circuits in my speaker setup, one is the 36V circuit powering the amplifier/speaker and the other is a 12V circuit powering a small mixer to boost the gain and tweak the sound, assuming i can find a switch capable of handling the 36V is it possible to have one switch that could be wired up to turn on both circuits at the same time?

Topic by ambientvoid   |  last reply


instructables site: Couldn't see my Drafts after creating new account until logout/login

Hi there, when recently creating a fresh account and trying to create the first draft, i wasn't able to see the drafts in my profile/start page. the draft was however accessible with the direct URL that i used from my browser history once i logged out and logged in (for the first time) again it worked fine for me and i saw the drafts don't know if its a bug or i did something wrong... cheers juergen

Topic by nebulx 


Acoustic Levitation?

I want to know if anyone knows a way to do this at home. Acoustic levitation is a way to levitate objects in space using sound waves. That site gave a very thorough explanation of how it works, but not how to do it. If someone knows how, I'd love to see an instructable.

Topic by ultrauber   |  last reply


Is Zipper the right name?

Hi I would like to know how to name the kind of system that closes freezing bag (have a look at the pi). Is zipper the right name? B.

Topic by BaptisteL8   |  last reply


GoPro Scuba Cylinder Mount

Hi there, I'm new here. I've recently found an entry-level 3D online modelling software, Tinkercad and have been Tinkering ever since. I'm into scuba diving and I've long wanted to design a GoPro mount for the cylinder to give a 3rd person view of me while I'm swimming about enjoying life underwater. (Think a less-sexy Lara Croft!) I wanted to run it past you guys to see what you think. I've attached 2 screenshots, because as you can see, the mount I've designed is collapsible, to save space in my GoPro bag. I've done the maths (Pythag) so each side is perfectly lengthed to create a right-angled triangle, with the hypotaneuse (long edge) is facing down my body, towards my feet, so that the camera view won't be obstructed. I've used a Pythag triple, so the arms measure 3", 4", 5". This was done for 2 reasons: a) It was easier to desine using these measurements and b) I don't want it sticking too far up from my cylinder so that it doesn't catch on wildlife/coral/divers. As this is my first GoPro mount that I've designed, I've had to go on deimensions I've found online for the actual hinges. I've settled on approx 3mm for each prong as well as the gap in between. I have actually shaved off .25mm from the middle prong of the 3-pronged-hinge, and left the 2-pronged-hinge at 3mm for the gap and prongs. I'm going to get the pieces 3D-printed by a local service I've found on 3DHubs.com, either in ABS plastic or in resin, though I'll probably go for ABS as it seems to be a bit more hard-wearing, even if it's not so detailed. In terms of mounting it to the tank, I will use 2 headstraps, with the over-the-top strap removed from each one and glue the plastic bits of each of them together, at the correct length of course. I would join them using a seperate piece of plastic and either a hot glue gun, superglue or even some sort of epoxy, whatever lasts longest in prolonged exposure to seawater. I would probably place it nearer the top of the tank, near to where the strap of the BCD jacket goes round it. Does anybody have any advice for me in terms of the design from a functional point of view as well as from whether they think it would actually get a good shot on the camera please? I look forward to your feedback, good or bad!

Topic by JackIsted   |  last reply


GoPro Scuba Cylinder Mount

Hi there, I'm new here. I've recently found an entry-level 3D online modelling software, Tinkercad and have been Tinkering ever since. I'm into scuba diving and I've long wanted to design a GoPro mount for the cylinder to give a 3rd person view of me while I'm swimming about enjoying life underwater. (Think a less-sexy Lara Croft!) I wanted to run it past you guys to see what you think. I've attached 2 screenshots, because as you can see, the mount I've designed is collapsible, to save space in my GoPro bag. I've done the maths (Pythag) so each side is perfectly lengthed to create a right-angled triangle, with the hypotaneuse (long edge) is facing down my body, towards my feet, so that the camera view won't be obstructed. I've used a Pythag triple, so the arms measure 3", 4", 5". This was done for 2 reasons: a) It was easier to desine using these measurements and b) I don't want it sticking too far up from my cylinder so that it doesn't catch on wildlife/coral/divers. As this is my first GoPro mount that I've designed, I've had to go on deimensions I've found online for the actual hinges. I've settled on approx 3mm for each prong as well as the gap in between. I have actually shaved off .25mm from the middle prong of the 3-pronged-hinge, and left the 2-pronged-hinge at 3mm for the gap and prongs. I'm going to get the pieces 3D-printed by a local service I've found on 3DHubs.com, either in ABS plastic or in resin, though I'll probably go for ABS as it seems to be a bit more hard-wearing, even if it's not so detailed. In terms of mounting it to the tank, I will use 2 headstraps, with the over-the-top strap removed from each one and glue the plastic bits of each of them together, at the correct length of course. I would join them using a seperate piece of plastic and either a hot glue gun, superglue or even some sort of epoxy, whatever lasts longest in prolonged exposure to seawater. I would probably place it nearer the top of the tank, near to where the strap of the BCD jacket goes round it. Does anybody have any advice for me in terms of the design from a functional point of view as well as from whether they think it would actually get a good shot on the camera please? I look forward to your feedback, good or bad!

Topic by JackIsted   |  last reply


5 KW Permanent magnetic generator

What horse power 24v DC motor do i need to run 5 kw permanent magnetic generator at 400 RPM? if I dont want to use wind turbine to run it.

Topic by azizmak   |  last reply


Veteran Discounts

Just wondering if you would be willing to offer Veteran Discounts for Pro membership?

Topic by bgunville   |  last reply


Remote Lockbox

I would like to build a small lockbox to which I could remotely provide access.  For example, I leave the box at a property.  At a later date, an employee is in the area and we would like him to access the property without having to make a trip back to the home office to pickup the keys.  We provide him a one-time access code and he retrieves the key. I recently discovered how much fun Raspberry Pi DIY projects are and this seems like an ideal candidate for my next challenge but I have to confess I am still a total neophyte to all this with no real notion as to the best way to move forward.  I would welcome any suggestions or ideas.  I also realize my definition of the problem might be more vague than is ideal but given my lack of confidence vis-a-vis which details are relevant, I thought it would be more productive for me to answer questions rather than post a giant wall of useless information - which is my long-winded way of saying, please do not hesitate to ask me any questions if they'll help get me pointed in the right direction.

Topic by Jason357   |  last reply


Arduino code sensor and moving wheel with encoder help with code

I'm still new at this but I been trying to figure this out for awhile now and can't seem to get it to work how I want it to. If  anyone can help or give advice on how I can go about doing this would be great. Thanks #include       const int BUTTON = A5;              // push button for starting       const int RIGHT_SERVO = 10;       const int LEFT_SERVO = 11;       Servo leftServo;       Servo rightServo;       int valButton;       int turnOnOff=0;             // the val of the pull up button is set to zero to start with             volatile int Lindex = 0;             void setup()       {         attachInterrupt(0,ltEncoderInterrupt,RISING);         Serial.begin(9600);         leftServo.attach(LEFT_SERVO);         rightServo.attach(RIGHT_SERVO);         leftServo.write(1500);         rightServo.write(1500);       }       void loop()       { Serial.println(turnOnOff);         turnOnOff=readButton();      // calls the function readButton to see if the button has been pressed(1)         int sensorValue = analogRead(A0);         if(turnOnOff==1)         {           if (sensorValue <300) //This robot moves on a white background           {           delay(500);                  leftServo.write(1700);           rightServo.write(1300);                              }           else if (sensorValue >300)           {                     // It stop when it detect a black electrical tape.           leftServo.write(1500);           rightServo.write(1500);            Lindex = 0;           delay(500);             }                                // can't seem to get it to work it keep moving backward           {                     }           leftServo.write(1300);           rightServo.write(1700);                     while (Lindex < 50) // this is how many tick i want it to move back with the encoder           {                     }           turnOnOff = 0;           Lindex = 0;         }                 else         {           leftServo.write(1500);           rightServo.write(1500);                  }        }             /************* Subroutine for reading the button switch********************/       int readButton()       {         unsigned long contactTime;               //local variable; contactTime declared         valButton=analogRead(BUTTON);            // Read the pushbutton on an analog pin         if(valButton>512)                        // Since 5V will produce a value of 1023, < 512 means button not pushed          return turnOnOff;                       // return the value of turnOnOff without changing it         contactTime=millis();                    // set contactTime = to the millis() clock value         while(valButton<=512)         {                   // while the pushbutton is pushed           valButton=analogRead(BUTTON);           // read the button value again and keep reading until valButton is less than 512         }         if(millis()-contactTime<20)               // If the button is held for less than 20 ms          return turnOnOff;                       // return the turnOnOff value unchanged          return(1-turnOnOff);                      // if the button is held longer than 20 ms then change the turnOnOff                                                  // to the opposite value to what it was       }       /////////////////////////////////////////////////////////////////////////////             /******************ISR for wheel count**************************************/       void ltEncoderInterrupt()       {                Lindex++;       }       ///////////////////////////////////////////////////////////////////////////////

Topic by al2tistic   |  last reply


8051 Project Ideas Needed

I have used Arduino's & RasPi's in the past for quite a few projects.  For my electronics college project I have to use an 8051(Arduino,etc are not allowed). After using Arduino's for the past 6 year's in most of my projects, I can't think of a good project which is possible to make on an 8051. I hope this thread turns into repository of 8051 projects that are still relevant today. The ideas posted in the comments could also be used in the Microcontroller Contest 2018. Please suggest in any 8051 project ideas in the comments below. Also mention the difficulty level & if possible a link to the project. Easy = No Sensors only Actuators Medium = Sensors + Actuators Hard = Sensors + Actuators + Communication(Wifi,Bluetooth) + Awesomeness

Topic by Jonathanrjpereira   |  last reply


Knex Atlantis: Update 1

Here is Atlantis, my knex ball machine. This machine has new layouts and designs not yet seen in ball machines of its size. Atlantis will only have one lift and four paths, this ball machine is mainly made for its looks. This ball machine is built on a 5X5 red rod base with 5X5 red rod walls that are slanted. This machine has two finished paths, one is almost complete, and one that has not been started. Some of the elements can be seen from the pictures. Im currently out of pieces, and wont be getting more for a long time, so Atlantis may not be standing for long. This ball machine has been in progress for months now. Tell me what you think!

Topic by DELETED_Blue Mullet 2   |  last reply


Can't find my saved in-progress instructable?

Hi, I spent time writing up a portion of an instructable (a lot of time).  I clicked the save button, and it indicated it was saved.  I've searched around my account page and can't find anywhere to get back to it so I can continue editing it.  Help anyone?  This seems silly, but I can't find a link anywhere.  (I found some threads about finding published instructables, but not about finding those that are saved, but not yet published.)  Thanks in advance!

Topic by Modustrial Maker   |  last reply


Good Manners

There has been a shift to much younger children on this great site,  kids who think that we who provide answers to their impossible dreams, are free site service robots  just for them.  ( Not leaving out a great many grateful individuals ! ) A lot of these kids believe we are clairvoyant about their specifics, some behave with poor street manners. My grand kids are being raised with good manners including respect. I hope you, with your children, here and other countries can avoid the,  throw_away_attitude mindset. Speaking for myself, I would happily welcome being recognized a living human resource more often... A Thank you is as pleasing a response as a BA... I even get along with Violators of thermodynamic laws.. There are individuals cutting your text, Keep your Guard-Up ! Regards and Thank You for reading my rant, ICeng...

Topic by iceng   |  last reply


Bicycle & Folding Shopping Cart

I've been trying to find some DIY instructions on how to attach a folding shopping cart to a bicyle, but get no where. I once saw someone on a bike who did just that, but I didn't get a close look at it. Nor did I ask them how they did it. Both of us were on errands, so.... Anyone out there who can figure out how to do this, without welding & metal bar cutting, as I don't have such tools to do that. However, if a hacksaw will work for any cutting needed... Thanks

Topic by MelPhleg   |  last reply


Trying to add to a contest but it's not listed

Hi, I'm trying to add my instructable (https://www.instructables.com/id/Build-an-Amateur-Radio-APRS-RX-Only-IGate-Using-a-/) to the Microcontroller contest but when I click to add it, that particular contest isn't listed. Would appreciate some help here. Thanks.

Topic by g6nhu   |  last reply


Does number of views and favorits effects your contest winning ?

Hi .. i know that the votes only have approx. 50 % of the winning descision the other half it the judging panel. But would like to ask. how much does the number of views and favorites effects the chances of wining. i am asking that because i was wondering about he results of the "indoor gardening contest" Grand Prize : "Views 1400, Favorites 120" First Prize 1: "Views 27.286, Favorites 451" First Prize 1: "Views 2380, Favorites 56" First Prize 1: "Views 2044, Favorites 76" Can anyone explain that to me ? 

Topic by stregoi   |  last reply


How to Post Code in the Editor

Could someone please help me. Please show me the correct way to post code in an "ible". I have seen where some people post it in its own box. I would like to be able to do that, Im just not sure how.

Topic by MakrToolbox   |  last reply


K'nex Wireless Charging Phone Dock

I had this wireless charger for my phone so I decided to incorporate it into a phone dock. I tried to make it look nice and used some creativity to get the angle I wanted for the back. The wire for the charger comes nicely out of the back of the base.

Topic by jollex   |  last reply


Motors

I'am making a car that should carry 50 kg and move at a speed of 10 km/hr. Can anyone help me in choosing the right DC motor??

Topic by Masked_r   |  last reply


ZipDart prototyping help

OK, had an idea and went with it for my ZipDart V.2. Unfortunately, currently having a bit of a brain fart of how to put a ratchet mech in. I've tried 7 attempts, 3 have even actuated and of those three none were responsive enough to be at all deserving of the ZipDart name. There is a google photo album linked below of the mech area and the gun on a whole. Feel free to comment either there or here with any ideas or insight. The mech can be complicated, just so long as it takes less than a half an inch of actuation rod travel to actuate and is fairly strong. Thanks for any help--if anyone has any questions or wants any more pictures, just ask. Photo album

Topic by Dreamwave   |  last reply


Put your skills to work for others in Dun4me!

Like I always do, I love to share with our community new and exciting things that I find in my cybertravels. I have found a site that can help some of you request projects to be made or made some money on the side by using your skills. Dun4me https://www.dun4me.com/category/recent

Topic by blkhawk 


Thank you...

Hello again, long-time no-see Instructables K'Nex community! I figured I'd make one last forum topic as a sort of farewell. This community was pretty incredible to me and for me in my early years of high school. Instructables was such a intuitive outlet for my free time years ago, and I wanna thank everybody who was there to tell me that my early K'Nex creations were trash. As sarcastic as that may sound, I mean it in all sincerity. Criticism is a good thing to learn from, and it has made me into the person I am today. Thanks again everybody! I'm not eloquent enough to describe how much those 2 1/2 - 3 years meant (and mean) to me. I've got one or two more things up my sleeve before I go though, so keep an eye out. In the meantime, check out this pre-view of my latest project. Lastly, if you are into gaming (a bit of self promo here), I decided to do something that no one else has done before, start a gaming channel. https://www.youtube.com/channel/UCWayoCFvVX9cmLo78q2lo_w If you see something you like, subscribe, yada yada yada, tell your friends, yada yada yada... -The Red Book of Westmarch (I had no idea how much I missed typing that out at the end of every instructable)

Topic by The Red Book of Westmarch   |  last reply


Fix Rattan/Bamboo furniture - NOT WICKER!!!

I recently bought a mid-century rattan dining table with four chairs.  I want to replace the cushions on the chairs - two piece, but they have snaps to keep the cushions in place.  I do not plan on having snaps on the new cushions, but that leaves me with the male part of the snaps.  If I pull them out, which I want to do, I will be left with a bunch of holes and no clue how to fix them, and since I haven't removed them yet, I have no idea how deep the holes will be.  I am open to any and all suggestions.   Thank you!   PS, I've tried to upload photos, but it's not working.  

Topic by Luny   |  last reply


Detecting digital screens (PC and Mobile)

Hi everyone, I have a project which is based on detecting the screen of PC or Mobile. Are there any common properties in digital screens? what is the best sensor or the best way to detect digital screens? I'm doing image processing, but I want to add quality by using sensors.  Thanks in advance

Topic by RashadS5   |  last reply


SS8550 D331 Transistor

Hi , Guys can you tell me if  2N2222 Transistor is equal ant to SS8550 . It's in an IR circuit . Thanks in advance :D

Topic by UsmanK14   |  last reply


PVC — one of the most hazardous consumer products ever created

PVC  is one of the most toxic products ever created - seems no-one here realizes this - PVC is NOT something to play around with - esp not for indoors! Google it!

Topic by weitgiest   |  last reply


How To get More Viewers & Teach online?

How do I get more viewers on Instructables.  And how could I teach upcycling on instructables?

Topic by renewalof48   |  last reply


USB type C

Greetings, USB type c please? So I have spent alot of time researching different ways to light small ornament designs. I have considered EL lighting and LED, yet, in order for these lighting techniques to work sufficiently, you need 12v of power. There are Instructables to power these lightning methods per USB, however this ofcourse only provides the lightning with 5v. What I find quite surprising however is that there are no tutorials whatsoever with the new usb type: USB-C. Since USB-C can apparently provide 20v I wonder why there is little to no information available concerning these subjects. Are there technical limitations I dont know about? If not: would anyone please help me make usb-c powered led strips ^^

Topic by zeepjes   |  last reply


Google photo links don't convert to images

I am creating an instructable (not my first) and I drop a link such as https://goo.gl/photos/irfpL1uLyiwrPopk7 into it but it isn't converted to the image, in the preview it remains as a link. Does the image only display on publishing or is it something I am doing wrong or is this a bug? Thanks

Topic by Microbe   |  last reply


AtTiny85 port analog / digital setup order bug

/*How to configure port setup in correct order AtTiny? Bug in combiler or  what is wrong here? Circuitry here has two LEDs and one analog input.  LEDs are ON or OFF depending voltage of potentiometer. Simple code below makes digital output PB1 high impedance, so LED current is too low because voltage drops. If port configuration setup is made in other order port output works fine. */ /*                     ___     D5 PB5  1|o      |8  Vcc     D3 PB3  2|        |7  PB2 A1   Voltage measurement, potentiometer     D4 PB4  3|        |6  PB1 D1   --|>--|          GND  4| ___|5  PB0 D0   --|>--| */ byte led0 = PB0; byte led1 = PB1; byte potentiometer = A1; int voltage; /* It is important in which order pin configuration has been set. Wrong order causes PB1 to high impedance, low current, output. This must be combiler bug, I think. If port BP1 setup has been made using straight to register there is no problem in order. Any other analog input port and digital port combination works correctly. */ void setup() {   pinMode(led0, OUTPUT);   pinMode(led1, OUTPUT);  // Doesn't work if this is before pinMode(potentiometer, INPUT);   //DDRB &= ~(1 << DDB2); // Alternative working setup for led1 as output   pinMode(potentiometer, INPUT);    //pinMode(led1, OUTPUT);  // Works if this led1 setup is after pinMode(potentiometer, INPUT); } void analog_input() {   voltage = analogRead(potentiometer);   if (voltage < 500) {     digitalWrite(led0, HIGH);     digitalWrite(led1, LOW);   }   else   {     digitalWrite(led0, LOW);     digitalWrite(led1, HIGH);   } } void loop() {   analog_input(); }

Topic by PaavoM   |  last reply


separate words with different links are joined together when previewed

I am creating an instructable and have the following "but there are similar  things " where the words similar and things are two different links. In the preview the two words are joined together "similarthings" and nothing I can seem to do ...short of removing a link... will prevent this. Any suggestions? Add to this...I can't attach images to this message.  The new uploader doesn't open anything, the old uploader uploads, but no image.

Topic by Microbe   |  last reply


low voltage lighting problem

SkidMark2, or anyone who can help, I have a Portfolio 120 Watt Power Pack with 6 LED lights.  I don't know their wattage, but the power pack, lights and supply cord all came as a kit, so I'm sure they don't require more power than the pack can supply.  I'm NOT getting the E1 error message.  My problem is that the lights don't come on when turned on.  The power pack is set to "O" for switching on or off manually, but the house's light switch usually has to be flipped once or twice to get them to come on.  I've got both light sensors covered, so they should be sensing darkness and allow the lights to come on.  Any idea how to fix this so that turning the switch on once turns the lights on???

Topic by KenKlos   |  last reply


The Community Over the Years

In the seven years I've been on Instructables, one thing I know to be true is that the community has changed. A lot. It is amusing to look over the "How to Steal An Instructable" post made years ago, which satirized the theft of projects. Looking back on things as old as this proves funny but also depressing though; the community has changed so dramatically in the years that have transpired that copied projects are now no longer the objects of satire or chiding but the recipients of praise and prizes. A few months ago, when I again broached the topic of copies on Instructables and the problems they cause, I was met with responses indicating that to overcome copycats all one needed to do was work a little harder. That is, those who have already put forward the effort of actually developing something new and of their own design should now work even harder to succeed. Curiously absent was any suggestion that copycats exert themselves and actually do something say--original. By chance, I ran into a thread I had not seen in years while writing this: the thread on the "Instructables laws," guiding principles users ought to observe. There are four, with some accompanying notes to all. The first entry, the Zeroth Law, is the one relevant to projects and their content. It states that: "if an Instructable exactly like yours has not already been posted, then you shall post your Instructable." An addendum is made to it, stating: "If your Instructable has an identical goal to a pre-existing Instructable, but achieves that goal by a different or improved route, or in a different style, then you shall also post your Instructable." The legitimacy of simplicity is also noted in an accompanying corollary. None of the above ideas are wrong. On the contrary, it is people ignoring this thinking which has caused serious issues. Nowadays, people know other projects have been published with identical instructions (and even superior quality), yet they proceed on and repost it themselves anyway. Furthermore, their copying usually violates the copyright restrictions laid out by the original creator. When the Instructables laws were written down, it is clear that original content was valued highly and respected. Nowadays, the dedication of the community toward these ideals is questionable to say the least. Today the community displays a disconcerting apathy toward makers and what they do. Just a few weeks ago, I was told the community is not interested in anything but the results--that the makers and their efforts are completely irrelevant. I'd rather not believe that is how the community at large believes things ought to be (especially given that it's a particularly unimpressive pitch to attract new makers and new ideas), but it seems like it may in fact be just that. With that in mind, things have obviously changed--for better or for worse is in the eyes of the beholder; I have already reached my own personal conclusion.

Topic by OrigamiAirEnforcer   |  last reply


How to Lit a 1watt LED using a NOKIA charger

I would like to lit 1w Power LED using NOKIA Charger. Mostly, a 1watt Power LED's specification is 3v0~3v4 DC Volts and 350mA Current. Printed specification on Charger Cabinet it is for - Input 100/240v 50~60 Hz…„ Output 5.7v/800mA. For Series Resistor's Value…„ if we calculate upon Ohm's Law - for VoltageSupply, Vs 5.7v…„ ForwardVoltage, Vf 3.3v…„ ForwardCurrent, If 330mA to lit single LED. In Result we can use a Standard Value of Resistor 7.5 Ohm and because of Resistor's Power Dissipation 792 Milliwatts, can use a 1watt. In series I planted 10 Ohm 1w Resistor instead of 7.5Ω. LED lit up in normal. Neither too much nor too little shining. But…„ about two and a half hours later it was flashing. I switched it's off and checked that the charger unit also became hot. Where I made mistake…? Please HELP how to lit this 1watt LED using this NOKIA charger. I also have one another charger with printed specification on cabinet it is for - Input 100~240v 50/60Hz…„ Output 5.2v/400mA. I also want to use this for one another 1watt Power LED to lit. Please help for this too. please ignore my  bad english.

Topic by free2atc   |  last reply


High current variable voltage from an atx psu

What would be the most simplistic way to draw up to 10a on an atx PSU using variable voltage controlled by a potentiometer? I've looked at a few diagrams using the LM317 but it is limited to 1.5a. The only other VVR I can find is the LM350 but is still limited to 3a. Any ideas? I was thinking of stacking an arrey of LM350s in parallel but this doesn't seem like a viable answer.

Topic by andrewlapham2010   |  last reply


Vending

Hey guys. I was going to make a vending machine with 4 servo motors which would use a RFID card as money like debit cards. I have made a sketch but, since i am really new to robotics it can have tons of problems and i don't have any idea about the code either. So, i thought maybe you guys could help me. And i have to say this project is really important for me and i have to make this thing. Your kind response and help is really appreciated Tnx

Topic by The robotics fan   |  last reply


Clicking the 'Publish' button does nothing

I have tried this multiple times in two different browsers (Chrome and Firefox on a Windows Vista PC).  - I signed in. - I click to the drafts section - I click edit on a finished draft - I click 'Publish' - I rearrange the cover photo - I select things from the drop down menus - I add keywords - I select a contest to join - I click 'Publish now' or the Publish button at the bottom Nothing happens... :-(

Topic by SantaB   |  last reply


I'ble won't publish.

I'm not trying to complain or make an issue, just thought I'd put it out there.  I am having issues posting my latest I'ble. Everything's fine up until I hit the "Publish" button. Nothing happens, no error, my browser doesn't attempt to do anything.  I'm working from a Desktop. I tried clearing my cache, cookies, history, etc. I also tried on Chrome and FireFox.  I know you guys will get this squared away soon.  - Adam

Topic by Adam Gabbert   |  last reply


how to make this work

Does anyone know how I could put a knex gun into this body? I like the p90 design,  just can't get a gun into it. Maybe a rail gun design could be made use of here. I also want the mag on top like a real p90 if you're gonna give me a design. ....if the top mag is possible

Topic by tinyhooman   |  last reply


The Add Images button is dead in replies

The "Add Images" button in the project replies area does not work. PC, Windows 10, Firefox

Topic by tgdula   |  last reply


Layout and page down function

The banner or top frame is enormous.  Why?  When I'm reading the instructable I admit I have the zoom enlarged.  the problem is the banner enlarges.  Now it occupies about 25-35% of the vertical space.  Why am I seeing this thing when I hit page down?  There's absolutely nothing of value on that banner.  Most of us (unless we have zero short term memory) don't need to see this space wasting thing.  Why not have an "opt out" option for it?  Give your readers a choice.  Readers like choices.  When I use Page Down using Firefox on Win7 it doesn't work accurately.  It goes too far so I'm missing a line or 2.  This has been like this for years.  Its because of that banner.  This happens often on many websites.  ----------------------- PDF downloads are nice but an HTML download would be far more useful as then the line could have an adjustable wrap width.  With the PDF the image size is locked.  This is very restricting and so last century.  Consider an HTML download  (minus that space wasting banner...duh) and that would preserve formatting and allow good user control.  ----------------------- You have one of the most informative and useful websites on the planet.  You should be proud of it.  I hope you are because its well deserved.  So now lets get it functioning more logically!

Topic by SpencerW 


Urge authors to make better project summaries

Hello! I see these neat projects all the time in the newsletter, but when I click on them I'm often bewildered.  When I see an instructible  want to know one thing: What does it do? Maybe it's my own shortcoming, but I wish that people would say in the first sentence what the point is of their project.  EXAMPLE 1: https://www.instructables.com/id/PC-SOUND-CARD-SCOPE-INTERFACE-FACILITATES-DC-RESTO/ This project is super cool and the steps seem clear.  However, what does it do?  It says in the title "facilitates DC restoration".  I don't know what that means.  It also says in the link "PC Sound Card Oscilloscope".  Does an oscilloscope somehow facilitate DC restoration?  I probably don't know enough about electronics for this to be useful to me, but it would be really nice to understand what he's making and what you'd use it to do.  EXAMPLE 2: https://www.instructables.com/id/Mini-2-wheel-robot-with-IR-sensor-weight-14gr-and-/ I'm sorry to pick on the guy who's apologizing for his English, but I wish that it said what the robot does.  EXAMPLE 3: https://www.instructables.com/id/the-algae-experiment-How-to-build-your-own-algae-/ This has a great description, and this is what I'm talking about.  I can't imagine what you would do with it, but it clearly makes algae.  Cool, if I want to make algae, I'll know where to look!   I think it would be easy to encourage people to include the purpose of their project in the summary, and perhaps it could be incorporated easily into the submission process (although a simple suggestion might do the trick).  Of course there are times when it wouldn't be appropriate, like when posting art related instructables.  Also the general purpose stuff, like how to make balls of ice (although it would be interesting to know why someone would make an ice sphere maker)!  Also guides, like "Plant Terrarium Basics" don't need the purpose spelled out.  But, I think that lots of other things would really benefit from it! Thanks, Gene

Topic by geneorama   |  last reply


Ideas for a Telescoping Arm for SpectrumLED V2.0 (LAMP)?

This is the project: https://www.instructables.com/id/SpectrumLED-V20-the-ULTIMATE-Variable-Spectrum-Lam/ I want to upgrade the telescoping arm mostly because I can, not because I must ;) I don't open/telescope it very often because right now it's too long at its shortest position. I adjust the swiveling "head" all the time, and when the rod is tightened so it's easy for me to telescope it, the head swivels which is annoying. I would like to separate them. I already have an idea which I think will be good for the swiveling head: http://woodgears.ca/tripod/head.html I've come up with the idea of making a scissor lamp, but I don't think that will be very simple to make, so I was wondering if anyone has a simpler and better idea for making something that telescopes (and locks). Add pictures ⋅⋅⋅ᴬᶰᵈ ᴱᴱ'ˢ, ᴵ'ᵐ ᵃʷᵃʳᵉ ᵒᶠ ᵗʰᵉ ᶠᵃᶜᵗ ᵗʰᵃᵗ ᴵ'ᵐ ᵖᵒʷᵉʳᶦᶰᵍ ᵗʰᵉˢᵉ ᴸᴱᴰ'ˢ ᶦᶰᶜᵒʳʳᵉᶜᵗᶫʸ ⁽ᴺᴼᵀ!⁾, ᵇᶦᵗ ᶦᶠ ʸᵒᵘ ˢᵗᶦᶫᶫ ʷᵃᶰᵗ ᵗᵒ ᶜᵒᵐᵐᵉᶰᵗ ᵗʰᵃᵗ, ᵖᶫᵉᵃˢᵉ ᵈᵒ ᶦᵗ ᶦᶰ ᵗʰᵉ ᶜᵒᵐᵐᵉᶰᵗˢ ˢᵉᶜᵗᶦᵒᶰ ᵒᶰ ᵗʰᵉ ᴵᶰˢᵗʳᵘᶜᵗᵃᵇᶫᵉ ᵗᵒ ᵏᵉᵉᵖ ᵗʰᵉ ᶜᵒᵐᵐᵉᶰᵗˢ ˢᵉᶜᵗᶦᵒᶰ ʰᵉʳᵉ ᵒʳᵍᵃᶰᶦᶻᵉᵈ, ᵗʰᵃᶰᵏˢ⋅ Any ideas would be really appreciated :)

Topic by Yonatan24   |  last reply


Sad News Proffesor Snape has passed.

"Severus Snape is a fictional character in J. K. Rowling's Harry Potter series. He is characterised as a person of great complexity, whose coldly sarcastic and controlled exterior conceals deep emotions and anguish." Wikipedia  Actor Alan Rickman, Snape in Harry Potter films, dies at 69. https://www.google.com/search?q=professor+snape+actor&biw;=1550&bih;=746&source;=lnms&tbm;=isch&sa;=X&ved;=0ahUKEwj31pf7larKAhUINT4KHTdRBq0Q_AUIBigB&dpr;=0.8

Topic by iceng   |  last reply


Amazing 3-axis LED orb

What's better than LEDs? Spinning LEDs! Laserpointer forums member FireMyLaser has decided that spinning LEDs is so much fun that he built a contraption that spins on 3 axes and creates some pretty insane effects. He also posted lots of build photos, but for now he's exceeded his photobucket bandwidth. Hopefully they'll be up again soon. NOTE: this is a forum post. Forums are where users can post links to other cool things happening in the DIY space and as such instructions aren't always available. Thanks! LED Orb 2.0 via MAKE

Topic by fungus amungus   |  last reply


How Do YOU Design K'NEX Guns?

K'NEX Gun Builders of Instructables, The reason that I am posting this Forum Topic is that I would like to hear how YOU design YOUR K'NEX guns. What are your secret techniques and tricks of the trade? Please post your comments and answers below. Thanks!, -The Knex Inventor

Topic by The Knex Inventor   |  last reply


Your Instructable Failed to Publish.

Not sure what the deal is, but I've tried this multiple times over the last few hours with no luck. 

Topic by craftedworkshop   |  last reply