# COMMUNITY

### Deleting a draft?

How do I delete a Collection draft?

Posted by firefightermeyer 3 years ago

### Usb Charger

I have 2 questions; 1.) Does anyone know if I can use a resistor in a usb charger? If so, what bands.(ex red,blue green, ect). 2.) Can I use an 3v LED to reduce the power to 6v. Would 6v harm my electronics?

Posted by ry25920 10 years ago

### Instructables Booth at Maker Faire Day 2

Here are some pictures from our booth on Sunday at the Maker Faire. We did some gorgeous full laptop etchings, handed out a tremendous number of stickers, and met lots of awesome people.

Posted by ewilhelm 10 years ago

### Can you allow users to use mathjax to add nicely formatted equations?

Http://www.mathjax.org/ Users can use Latex-like formatting, such as $\sum_{i=1}^n \frac{1}{n}$. See http://math.stackexchange.com for example. Thanks, Joe

Posted by angler 6 years ago

### Help with 1/8 inch phone plug

What side is positive and what side is negative on a phone plug? when i unscrew it it has a long end and a short end. This is the one im using:http://www.radioshack.com/product/index.jsp?productId=2104063and advice?

Posted by um0123 9 years ago

### Drive Shaft To Pulley

Help! How do I attach this pulley (or any pulley) to a drive shaft? Specifically: This Motor: https://www.amazon.com/gp/product/B00O8UKN7I/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc;=1 To This Pulley: https://www.amazon.com/gp/product/B00004RAO8/ref=oh_aui_detailpage_o03_s01?ie=UTF8&psc;=1

Posted by john.walsh 1 year ago

### knex targets

Please anser yes or no to following questions: 1.do you want more knex targets? 2.would it be worth it to post my target? 3.would it be better to have more than 1 target on an istructable? 4.would you be willing to give ideas for me to put on to THAT instructable?

Posted by ricky0207 11 years ago

### Pan Tilt Face Detection

HI I'M GETTING THESE ERRORS IN VC++ 2010, HOW DO I RESOLVE THIS? 1>facedetect.obj : error LNK2019: unresolved external symbol "public: void __thiscall Tserial::disconnect(void)" (?disconnect@Tserial@@QAEXXZ) referenced in function _main 1>facedetect.obj : error LNK2019: unresolved external symbol "public: int __thiscall Tserial::connect(char *,int,enum serial_parity)" (?connect@Tserial@@QAEHPADHW4serial_parity@@@Z) referenced in function _main 1>facedetect.obj : error LNK2019: unresolved external symbol "public: __thiscall Tserial::Tserial(void)" (??0Tserial@@QAE@XZ) referenced in function _main 1>facedetect.obj : error LNK2019: unresolved external symbol "public: __thiscall Tserial::~Tserial(void)" (??1Tserial@@QAE@XZ) referenced in function "public: void * __thiscall Tserial::`scalar deleting destructor'(unsigned int)" (??_GTserial@@QAEPAXI@Z) 1>facedetect.obj : error LNK2019: unresolved external symbol "public: void __thiscall Tserial::sendChar(char)" (?sendChar@Tserial@@QAEXD@Z) referenced in function "void __cdecl detectAndDisplay(class cv::Mat)" (?detectAndDisplay@@YAXVMat@cv@@@Z) 1>c:\users\auvsi2014\documents\visual studio 2010\Projects\facedetect\Debug\facedetect.exe : fatal error LNK1120: 5 unresolved externals

Posted by dnarayanan93 4 years ago

### What fittings can I connect together (building an air compressor) ?

Hi, I'm building an air compressor out of fridge compressors, propane tanks and NPT fittings from ebay, everything was cool until I received a check valve I ordered before all the other stuff (because it was from another seller so no need for a group order :) for one item). So I ordered a 1/8 female/female check valve (one way valve), and I measured the diameter with calipers, and it's not 1/8" (3.2mm) but a lot more, which makes sense, 3mm would be really tiny so now I don't understand how all of that works here are the fittings that will compose the system (those are 1/2 I guess but I will order 1/4 and 1/8 as well to make the complete circuit (around 20 fittings total): http://www.ebay.com/itm/281299625853 here is the check valve I already ordered (1/8 BSPP): http://www.ebay.com/itm/182025682762 I also noticed the valve is linear while the fittings appear to be the shape of a cone, will it matter ? Thanks in advance for any help ;)

Posted by nazmo76 2 years ago

### Ideas for a wire chess set.

I was thinking about doing a wire chess set. Since it was suggested by CaitlinsDad over here: https://www.instructables.com/community/Requesting-feedback-on-a-Fire-Breathing-Dragon-tes/ Came up with this. These are rough (obviously), the rook should have crenelations and I did the king and queen in the same piece. It's like 5 AM and my fingers hurt from working on a wire Nine Tailed Fox (from Naruto) for my son. So, I took a short cut. The picture should make it clear how I'm planning to make things look. The knight is abstract, it always bothers me when the horse is the only thing with any detail. The pawn is about 1/2" x 1" tall, the queen would be just under 2" tall, the king is about 2 1/4" tall, both by 1" wide, the other 3 are about 1 1/2" x 3/4". It is done in 18g galvanized steel. Anybody still reading? Great! I'd love to get some feedback, good, bad, anything to either confirm it is just the best thing ever OR how it could be improved towards that goal. So don't hold back. Cheers.

Posted by Thrasym 5 years ago

### Help With arduino Tic tac toe

//This program is a 2 human player tic tsc toe//Created on August 26, 2008 int val; int O; int val2; int playerTurn = 1; int spotOne = 01; // These are the varibles for each possible spot on the grid int spotTwo = 02; int spotThree = 03; int spotFour = 04; int spotFive = 05; int spotSix = 06; int spotSeven = 07; int spotEight = 8; int spotNine = 9; int Player1 = 00; // these will be used to have the players choose their spot on the grid int Player2 = 11; void setup () { Serial.begin(9600); (playerTurn == 1); Serial.println ("Welcome to the two player tic tac toe game."); Serial.println ("Players will take turns putting their choices into the terminal by number."); Serial.println ("Each free space on the grid will have a number on it from 1 to 9."); Serial.println ("Player one will be an 0 and player two will be an 11"); Serial.println ("The first person you get 3 of theor symbols in a row wins"); delay (5000); }void loop (){Serial.println(val);Serial.print (spotOne);Serial.print (" !");Serial.print (spotTwo);Serial.print (" !");Serial.println (spotThree); //First LineSerial.print (spotFour);Serial.print (" !");Serial.print (spotFive);Serial.print (" !");Serial.println (spotSix); //line 2Serial.print (spotSeven);Serial.print (" !");Serial.print (spotEight);Serial.print (" !");Serial.println (spotNine);Serial.print ("It is player ");Serial.print (playerTurn);Serial.println ("'s turn, enter your selection");delay (500); if (playerTurn = 1){ if (Serial.available()) { (val = Serial.read()); if (val == 49){ if (spotOne != 11 || 0){ (spotOne == 11); (playerTurn = 2); } if (val == 50){ if (spotTwo != 11 || 0){ (spotTwo == Player1); (playerTurn = 2); } if (val == 51){ if (spotThree != 11 || 0){ (spotThree == Player1); (playerTurn = 2); } if (val == 52){ if (spotFour != 11 || 0){ (spotFour == Player1); (playerTurn = 2); } if (val == 53){ if (spotFive != 11 || 0){ (spotFive == 11 ); (playerTurn = 2); } if (val == 54){ if (spotSix != 11 || 0){ (spotSix = Player1); (playerTurn = 2); } if (val == 55){ if (spotSeven != 11 || 0){ (spotSeven = Player1); (playerTurn = 2); } if (val == 56){ if (spotEight != 11 || 0){ (spotEight = Player1); (playerTurn = 2); } if (val == 57){ if (spotNine != 11 || 0){ (spotNine = Player1); (playerTurn = 2); }}}}}}}}}} } } if (playerTurn = 2){ if (Serial.available()) { (val = Serial.read()); if (val == 49){ (spotOne == 0); (playerTurn = 1); } if (val == 50){ if (spotTwo != 11 || 0){ (spotTwo = Player2); (playerTurn = 1); } if (val == 51){ if (spotThree != 11 || 0){ (spotThree = Player2); (playerTurn = 1); } if (val == 52){ if (spotFour != 11 || 0){ (spotFour = Player2); (playerTurn = 1); } if (val == 53){ if (spotFive != 11 || 0){ (spotFive = Player2); (playerTurn = 1); } if (val == 54){ if (spotSix != 11 || 0){ (spotSix = Player2); (playerTurn = 1); } if (val == 55){ if (spotSeven != 11 || 0){ (spotSeven = Player2); (playerTurn = 1); } if (val == 56){ if (spotEight != 11 || 0){ (spotEight = Player2); (playerTurn = 1); } if (val == 57){ if (spotNine != 11 || 0){ (spotNine = Player2); (playerTurn = 1); }}}}}}}}} } }} Can anyone help me with this program. I cant quite get it to work properly. You can make changes anywhere.

Posted by sotsirh194 10 years ago

### bipods for rifles

Well, im in the planning phase of making a new air rifle, i rly want to put a bipod on it this time. i have been looking all around the interwebs, but no success on finding plans/instructions/ideas on how to make one. so my question is, dose any 1 know how to make a bipod, or dose any 1 have any ideas/info or any contributions at all? My preferences are that it be made from something easy to get my hands on. And that it has some manner of folding away. Also, 1 request, no k'nex plz :)

Posted by chinnerz 9 years ago

### Putting a 1/4in Stereo Jack into a computer :)

I'm thinking this will be my first instructable. I plan to put a 1/4 in stereo jack in the front panel of my PC. I can do that. The problem is, I need to figure out a way to amplify the sound, since my 30-year old earmuffs use a 1/4 inch jack and suffer from low power. I'm thinking USB power. Any suggestions? I know comps, I know how to do this, I just know nothing about amps :)

Posted by mikesty 11 years ago

### Of props and guns

Hmm... I'm sure that I posted this before. Anyways, I was planing to make a (non-working) revolver 1:1 scale. I kind of have an idea on how to make it, I just have a problem developing a plan to make a double action trigger and a rotating cylinder with the cylinder popping out of the side with a release button. A picture diagram would really help. Also: I would like to hear suggestions for material, mainly for the handle. I'm kind of new to this sort of thing.

Posted by Ausm 9 years ago

### homemade pizza with it's dough

Posted by Skull 8 years ago

### lancer

If anyone knows how to make a home made lancer from gears of war pllz post it!!!

Posted by Z-and-B-inc 11 years ago

### search bar

Seaarch bar appears to be missaligned and doenst work when i hit enter

Posted by Linkster999 6 years ago

### Robotsâ¢

For creators of robots that DON'T have wheels, yet still move!

Posted by robotmaster 10 years ago

### Dont answer 2

Still didnt work. i hope it works now

Posted by bdcoco 10 years ago

### E books

How do you dowload E books from your site?

Posted by rosbucs 6 years ago

### Rate my drawing!

Check it out! Constructive criticism please :P

Posted by FoxyPenguin94 7 years ago

### knife

Someone show me how to make a bowie knife!!

Posted by shadow wave rider 6 years ago

### Robot

I want to build a robot that will cost a max of 300 bucks. Any ideas?

Posted by sci4me 9 years ago

### Special Effects?

I NEED SPECIAL EFFECTS PROGRAMS FOR MY VIDEOS please? -thanx

Posted by the_real_mccoy_ 5 years ago

### i want to start and stop my line follower robot robot by blutooth

Posted by ShaidK 2 years ago

### blimp coming soon! but need help

I have restarted the blimp project and it will be coming soon....i hope. i need to know how many cubic feet of helium does it take to lift 1 pound (16 ounces). also need to know if mylar will melt to. please respond

Posted by Sun Gear 10 years ago

### h.a.a.u.v.1

Hi! this is kgb showing you my highly addaptable artillery unit version one! it can fire: rifle ammo, crossbow arrow, and cannon ammo. It gets about 200 feet should I post?

Posted by Knex_Gun_Builder 9 years ago

### Splitting Bluetooth Audio

Does anyone know how I might send 2 seperate pieces of audio to 2 separate actors via bluetooth headsets? ie to make 1 headset receive channel 1&2 and the other to receive audio channels 3&4. This should make for a great performance if I crack this... Thanks

Posted by Combover 10 years ago

### My Latest Instructable Not Showing Up In Search

Hi all my latest instructable is not showing up In search or on the latest page. don't know if i did something wrong. https://www.instructables.com/id/Camera-external-microphone-jack-mod-1/ andrew

Posted by andrew mcneil 5 years ago

### Connect multiple Reed Switches to one Raspberry pi

Hi, I was wondering if its possible to connect multiple reed switches to 1 Raspberry Pi so i can get notified whenever 1 or more switches gets triggerd. thank you.

Posted by archi0112 1 year ago

### constant power with timed output

Hi all,           So ive found a circuit that i wish to use found here: http://www.maplin.co.uk/module.aspx?TabID=1&criteria;=usb&ModuleNo;=220003&C;=SO&U;=Strat15 its a temperature activated circuit so when it gets to say 30 degrees celcius it switches the relay and makes the connection what i need it to do is when it reaches the designated temp, give a momentary 12v for 2 seconds then do nothing for 1 minute, if it is still at the designated temp after 1 minute give another 12v for 2 seconds then nothing for 1 minute and so on and so on untill the temp drops below the designated temp and the circuit will no longer be live untill it reaches temp again. is there any easy way to modify this circuit or another way to do this thanks

Posted by newbie308 7 years ago

### My First Arduino Object Avoiding Robot!!!

Hey guys I am making my very first robot and have been researching for a while now......i have the parts but i am blank on what to do with them. I have:  2 DC motors 1 Ultrasonic sensor Arduino Uno 1 L293D (IC) 1 breadboard jumper cables 1 mini servo a power source for 4 AA batteries Robot chasis I want that the robot goes front and stops when object is near then looks right and left and moves accordingly..... Now keep in mind that i have 2 DC motors and NOT SERVOS so how should i program this or connect all the parts so that it works......PLZZZ do help its urgent.

Posted by mani_97 3 years ago

### Really basic Resistance / Amperage question:

Before I begin: yes, I should know this already, but I'm really sleep deprived right now, and therefore slightly muzzy on my electronics knowledge... My circuit has two loops running in parallel off one, limited, 18v power supply: [*] Loop 1 requires the majority of the supply's power to run [*] Loop 2 is simply a 7805 voltage regulator supplying 5v to an analog input on an Arduino, so needs almost no current running through it. [*] when Loop 1 and Loop 2 are both active, Loop 1 does not get enough power. if I place a resistor in Loop 2, in series with the 7805, will it increase the amperage to Loop 1? I think the answer is yes, but, once again, I'm MASSIVELY sleep deprived. any help is appreciated.

Posted by gschoppe 10 years ago

### Knex Gunner Of the Year Award

Ever wonder who is the best builderthe one with the best ideaS and the best knex gun instructables out?Well here it is The Knex Gunner Of the Year AwardThere are 10 NomineesYou guys will vote on who is the best So to vote what you do is in your post you firest put the date then put the nominee's name and the you add +1 so eg: Zero0928 +1 NOMINEES1.Mepain2.PerfectDuck3.Loosewire:SOE Operative4.Trainman 20005.IpodKiller6.Bunduk7.Oodalumps8.Danny9.Knex Hater Hater10.KillerK Rules1. YOU CAN ONLY VOTE ONCE if you vote tWIce your vote will not count.By 6:00 everyday (canada time) i will add up the votes.VOTING CAN BE DONE UNTIL JULY 20th

Posted by zero0928 11 years ago

### Micro K'nex Killer Kobra roller coaster Update 1

Hooray!!! Update!!!! Thanks to the people of instructables I have been able to make progress on my micro knex killer kobra. Thanks to your votes I have added a Zero-G roll. Apart from that I have added a cutback and a small hill. Now I have two more options for you to choose from. The last two pictures show what each one is. Option 1: Barrel roll Option 2: Helix Just so you know right after one of these elements I will add a propulsion system that will hopefully give me enough speed to add a few more elements. The first element to get 4 votes wins.

Posted by Tornado96 8 years ago

### Got a 1/2 HP motor

I just got a Got a 1/2 HP motor for free from my school (there were 2 old vacuum pumps that were covered in dirt and have been in a shed for like a year. One of my friend got one and is turning it into a lathe. They are really nice and quiet GE motors. Their bearing just needed some lube and then they are all fixed!). All it needs is a capacitor (can get from ebay for like 15 bucks including shipping) What should I make with it? So far I'm thinking rotary spark gap for my tesla coil (take THAT plamana!) but i'd like to utilize the power more (don't really need 1/2 HP for a spark gap!). Any other ideas? BTW I'm not making a gokart. lol. But it would be cool.... BUT NO

Posted by guyfrom7up 10 years ago

### WAT.1 paper airplane contest August [Extended] [1] [open] - Paper Airplane Start Power Launcher

This is a first weekly contest. Requirements: Can make the Paper Airplane Fly 70 feet up the air. A paper airplane launcher.  Instructables requirements: Need a "How to launch it step" before the first stuff step. To enter: Just put your instructables URL in the comment. 1st: A weekly patch from me and a message tipping. 2nd: A 2nd prize message. 3rd: A 3rd prize message.

Posted by wat. 7 years ago

### Question

Could I post the same instructable into this contest and the Light up your Ride contest?

Posted by pmac93 10 years ago

### favorite nerf gun

Please tell me your favorite nerf gun

Posted by SpiderJockey 7 years ago

### Parkour

Does anyone have any ideas for practicing parkour on your property(in your house).

Posted by grimfig 10 years ago

### favorite song(s)

whats your favorite songs by the Beatles.mine are come together and birthday.

Posted by nfk11 7 years ago

### Links don't work

Can't get past the first page in the recipe for Easy Truffles.

Posted by marilynnla 8 years ago

### NEW, UNUSED SILKSCREEN AND ACCESSORIES FOR US$20 For Sale Silkscreen 10*14 inside 1 Black and 1 White ink bottles 8 fluid oz Photo Emulsion, Screen Filler, and Drawing Fluid 4 fluid oz Squeegee All this for US$20 plus shipping

Posted by fire_drakon117 6 years ago

### Favourite Primary and Side-arm (K'nex)

If you could only make 1 primary and 1 side arm to take on your stupid little brother in a K'nex war, what would they be? Personally, I would take Dsman's DD-27, and Dsman's side-arm.

Posted by Trauts 10 years ago

### Trading Legos for Knex!!

Do you have knex that are unwanted? Do you want legoes, and have a lot of knex? Are you willing to trade equal amounts of legoes for knex? 1:1 Knex to legos. You send Knex, I send Legos.

Posted by PKTraceur 9 years ago

### Can anyone Identify this...thing?

This came as part of a physics lab.  Can anyone identify this thing and where I might purchase a duplicate should I need one? Description: It's approximately 1 1/4 inches long and has two holes running through the center. It's made out of rubber.

Posted by Spaceman Spiff 8 years ago

### can you help with homework?

Im in algebra 1 and need help on a word problem The scenario is a cinama sells 532 buckets of popcorn for 1489.50. A large bucket sells for 2.25 and a jumbo sells for 3.75. Questios: 1.write an equation to model the situation (slope intercept or something) 2.how many jumbo buckets were sold?

Posted by fretmelter 11 years ago

### Working Mayan Calendar Round

title kind of says it all, but a working mayan calendar round, where everyday you turn the day dial 1, then every 13 days it turns the 2nd gear by 1 and so forth. I've seen a couple projects on here containing cnc'd gears and the such.

Posted by nuentoter 8 years ago

### Li-ion 5 pin, pinout?

Good Day Fellow TinkerersI have a battery that came out of a Android Tablet that i want to use for another project.It has a cuircuit board attache to the top which i would assume is a over/under charge protector and it has 5 wires coming off of that. 2 x Red, 1 x White and 2 x Black.The two black wires are connected to the same pad on the "protection circuit" and the two red are connected to the same pad. The white wire is on a separate pad i.e. 3 pads, 1 with 2x red, 1 with 2 x black and 1 with 1 x white.I figure the Red would be positive and the Black negative and then i would assume that the white is the Thermistor connection.My Question :How do i connect this externally from the tablet to charge? I figure red and black are the usual, but how do i connect the white wire?Thanks in advance for any help :)

Posted by GhengisKhan1981 5 months ago

### Assault rifle contest!

The assault rifle competition winner will get a 5 star rating on any 5 instructables/forum topics/groups. (in that order, can mix). the 3 runners up will recieve a 5 star rating to an instructable of their choice.There will be categories, and everyone can vote for one gun in each category. i am only accepting assault rifles - must have a working mag, be the size of a rifle and fire.A voter may only vote up to two of their guns into any of the categories, and must vote something for every category. You may only vote onceCategoriesBest looking assault rifle1.Banana inventors 10 shot auto loading rifle2.-3.-Most innovative assault rifle1.Storm 2232.-3.-Most powerful assault rifle1.Storm 2232.-3.-Most reliable assault rifle1.The Burrito Master's Scar 11.012.-3.-Highest power:pieces ratio (ie. the more power per piece = better)1.Crestind's AST rifle2.-3.-Best overall assault rifle(cannot enter in this category, the guns with the top 3 ammounts of votes in any category will earn a place here)1.Storm 2232.Banana inventors 10 shot auto loading rifle/Crestind's AST rifle/Burrito's Scar 11.013.

Posted by The Jamalam 10 years ago