Bug: Profil "about" part

I have recently updated my Profile but the “about” part is not displayed correctly. There are some &´s and semicolons that shouldn´t be there. That happens every time I have used an apostrophe in my text (That what an apostrophe looks like know: Hey I´m). What can I do to change that? Does anyone else has the same problem? Thank you very much for your help!

Topic by He Se    |  last reply

Pepakura files

Can anyone help me with finding some good Pepakura file sharing websites? I already know: www.405th.com www.PropZone.be www.Tamasoft.com www.Printablearmory.com www.forum.soaringhammer.com But is there any other sites? or links to files?

Topic by jcbcrtr   |  last reply

Maker Tin Ideas

Hello everyone,You may or may not have seen my latest instructable and entry into the Pocket-sized contest.>>> Maker Tin <<<Well even after i had crammed all those tools into the tin, there was still space left !!So i thought i would turn to the community for help filling that space !Thanks to..KitemanGmjhoweYokozunaTobz1122...for the great suggestions.I have already awarded the our patches and i need to save them for other contests so i cant give out any more :( sorry. Thanks for all the fantastic ideas !!Currently the Maker Kit contains :Mini Craft KnifeSupergluePencilNotepadMatches and strikerSewing KitMetal FileButton Cell batteryRed,Yellow,Green,Blue LED'sResistorsWireShrink Tubing2x Crocodile clipsSandpaperDuct TapeElectrical TapeMini ScissorsMagnet (Gmjhowe)Screw/Nail holderSaw (Tobz1122)2x Zip ties (Yokozuna)Candle (Kiteman)So the question is, What maker tools would you like to see in the kit ??I look forward to your suggestions !

Topic by =SMART=   |  last reply

We need a "Like" button

  I think Instructables is missing a "Like" button.  There are many Instructables I see that I would want to "Like".  I know there is a favorite button, but I only use that to "Tag" the Instructable, so if there is something I wanna learn I can easily go back.    Not everyone wants to favorite a post, due to the fact they might use it for the same purpose I do.  But if we had a like button at least the creator might get more of a response on how many people actually "Liked" the Instructable.

Topic by spyder2021   |  last reply

Convert Crayons into 2mm+ Leads Like Graphite Lead

Hello! I want to recycle crayons and thought of converting them into 2mm lead or larger in diameter (since there’s only a certain thickness where crayons can be sturdy). I also thought the crayons should be mixed with something since they’re wax. I was thinking of buying a silicone mold rubber to make a mold (may make the lead bend since it’s flexible but easy to remove), a polyurethane mold rubber, or a protruder like the old fashioned way. Silicone mold rubber is expensive ($30+). I originally thought of it as a craft, but it’s too complicated for a craft. Thank you for your time!

Topic by TrixiaL   |  last reply

Programming XMC1100 from Windows10 on a MacBook Pro doesn't work ?

Hello, I'm trying to get a connection between my Microcomputer XMC1100 and my Windows10 Partition on a MacBook Pro. I've installed the recommended development environment Dave from Infineon and everything works fine except the connection to the microcomputer. Is this connection maybe due to hardware not possible?  What else could be the reason ? Please help, regards 

Topic by -mister-   |  last reply

new to arduino, want to run a dual display for 2 sensors

I'm new to the Arduino community.  wanting to set up a dual radar setup with 2 ultrasonic sensors,  (Ultrasonic Sensor Module HC-SR04), and outputting to a pair of 7 segment displays ( two 7 segment displays each).  I've found a code to do a single could use a lot of help to output two at the same time, basically 2 lanes without 2 units.  im using an arduino mega, ordered a unor3 and hopefully it can be made to run on one or the other. code is as follows: /* HC-SR04 Sensor    The circuit:     * VCC connection of the sensor attached to +5V     * GND connection of the sensor attached to ground     * TRIG connection of the sensor attached to digital pin 2     * ECHO connection of the sensor attached to digital pin 4  */    /*  This is a radar ping sensor that calcultates the speed of an  object traveling away or towards the sensor. I took some of this  code for the HC-SR04 Sensor implementation by Tautvidas Sipavicius. The rest  is original code from me. I know that the seven segment display  code is not the best to look at or the most optimized but it  serves its purpose just fine and is easy to understand.    Written by Matthew Ladd  */   const int trigPin = 2; const int echoPin = 4;   void setup() {   // initialize serial communication:   Serial.begin(9600);   //First 7 segment (ones place)   pinMode(30,OUTPUT);//F   pinMode(31,OUTPUT);//G   pinMode(32,OUTPUT);//E   pinMode(33,OUTPUT);//D   pinMode(34,OUTPUT);//C   pinMode(35,OUTPUT);//B   pinMode(36,OUTPUT);//A   //Second 7 segment (tens place)   pinMode(37,OUTPUT);//F   pinMode(38,OUTPUT);//G   pinMode(39,OUTPUT);//E   pinMode(40,OUTPUT);//D   pinMode(41,OUTPUT);//C   pinMode(42,OUTPUT);//B   pinMode(43,OUTPUT);//A } void zerofirst(){   digitalWrite(30,LOW);   digitalWrite(31,HIGH);   digitalWrite(32,LOW);   digitalWrite(33,LOW);   digitalWrite(34,LOW);   digitalWrite(35,LOW);   digitalWrite(36,LOW); } void onefirst(){   digitalWrite(30,HIGH);   digitalWrite(31,HIGH);   digitalWrite(32,HIGH);   digitalWrite(33,HIGH);   digitalWrite(34,LOW);   digitalWrite(35,LOW);   digitalWrite(36,HIGH); } void twofirst(){   digitalWrite(30,HIGH);//F   digitalWrite(31,LOW);//G   digitalWrite(32,LOW);//E   digitalWrite(33,LOW);//D   digitalWrite(34,HIGH);//C   digitalWrite(35,LOW);//B   digitalWrite(36,LOW);//A } void threefirst(){   digitalWrite(30,HIGH);//F   digitalWrite(31,LOW);//G   digitalWrite(32,HIGH);//E   digitalWrite(33,LOW);//D   digitalWrite(34,LOW);//C   digitalWrite(35,LOW);//B   digitalWrite(36,LOW);//A } void fourfirst(){   digitalWrite(30,LOW);//F   digitalWrite(31,LOW);//G   digitalWrite(32,HIGH);//E   digitalWrite(33,HIGH);//D   digitalWrite(34,LOW);//C   digitalWrite(35,LOW);//B   digitalWrite(36,HIGH);//A } void fivefirst(){   digitalWrite(30,LOW);//F   digitalWrite(31,LOW);//G   digitalWrite(32,HIGH);//E   digitalWrite(33,LOW);//D   digitalWrite(34,LOW);//C   digitalWrite(35,HIGH);//B   digitalWrite(36,LOW);//A } void sixfirst(){   digitalWrite(30,LOW);//F   digitalWrite(31,LOW);//G   digitalWrite(32,LOW);//E   digitalWrite(33,LOW);//D   digitalWrite(34,LOW);//C   digitalWrite(35,HIGH);//B   digitalWrite(36,LOW);//A } void sevenfirst(){   digitalWrite(30,HIGH);//F   digitalWrite(31,HIGH);//G   digitalWrite(32,HIGH);//E   digitalWrite(33,HIGH);//D   digitalWrite(34,LOW);//C   digitalWrite(35,LOW);//B   digitalWrite(36,LOW);//A } void eightfirst(){   digitalWrite(30,LOW);//F   digitalWrite(31,LOW);//G   digitalWrite(32,LOW);//E   digitalWrite(33,LOW);//D   digitalWrite(34,LOW);//C   digitalWrite(35,LOW);//B   digitalWrite(36,LOW);//A } void ninefirst(){   digitalWrite(30,LOW);//F   digitalWrite(31,LOW);//G   digitalWrite(32,HIGH);//E   digitalWrite(33,HIGH);//D   digitalWrite(34,LOW);//C   digitalWrite(35,LOW);//B   digitalWrite(36,LOW);//A } void zerosecond(){   digitalWrite(37,LOW);   digitalWrite(38,HIGH);   digitalWrite(39,LOW);   digitalWrite(40,LOW);   digitalWrite(41,LOW);   digitalWrite(42,LOW);   digitalWrite(43,LOW); } void onesecond(){   digitalWrite(37,HIGH);   digitalWrite(38,HIGH);   digitalWrite(39,HIGH);   digitalWrite(40,HIGH);   digitalWrite(41,LOW);   digitalWrite(42,LOW);   digitalWrite(43,HIGH); } void twosecond(){   digitalWrite(37,HIGH);//F   digitalWrite(38,LOW);//G   digitalWrite(39,LOW);//E   digitalWrite(40,LOW);//D   digitalWrite(41,HIGH);//C   digitalWrite(42,LOW);//B   digitalWrite(43,LOW);//A } void threesecond(){   digitalWrite(37,HIGH);//F   digitalWrite(38,LOW);//G   digitalWrite(39,HIGH);//E   digitalWrite(40,LOW);//D   digitalWrite(41,LOW);//C   digitalWrite(42,LOW);//B   digitalWrite(43,LOW);//A } void foursecond(){   digitalWrite(37,LOW);//F   digitalWrite(38,LOW);//G   digitalWrite(39,HIGH);//E   digitalWrite(40,HIGH);//D   digitalWrite(41,LOW);//C   digitalWrite(42,LOW);//B   digitalWrite(43,HIGH);//A } void fivesecond(){   digitalWrite(37,LOW);//F   digitalWrite(38,LOW);//G   digitalWrite(39,HIGH);//E   digitalWrite(40,LOW);//D   digitalWrite(41,LOW);//C   digitalWrite(42,HIGH);//B   digitalWrite(43,LOW);//A } void sixsecond(){   digitalWrite(37,LOW);//F   digitalWrite(38,LOW);//G   digitalWrite(39,LOW);//E   digitalWrite(40,LOW);//D   digitalWrite(41,LOW);//C   digitalWrite(42,HIGH);//B   digitalWrite(43,LOW);//A } void sevensecond(){   digitalWrite(37,HIGH);//F   digitalWrite(38,HIGH);//G   digitalWrite(39,HIGH);//E   digitalWrite(40,HIGH);//D   digitalWrite(41,LOW);//C   digitalWrite(42,LOW);//B   digitalWrite(43,LOW);//A } void eightsecond(){   digitalWrite(37,LOW);//F   digitalWrite(38,LOW);//G   digitalWrite(39,LOW);//E   digitalWrite(40,LOW);//D   digitalWrite(41,LOW);//C   digitalWrite(42,LOW);//B   digitalWrite(43,LOW);//A } void ninesecond(){   digitalWrite(37,LOW);//F   digitalWrite(38,LOW);//G   digitalWrite(39,HIGH);//E   digitalWrite(40,HIGH);//D   digitalWrite(41,LOW);//C   digitalWrite(42,LOW);//B   digitalWrite(43,LOW);//A } long distanceOverTime(long first,long second){  return ((first-second)/.1)*.0223693629;//taking cm/s to mph } long holder;//store the cm from last time through loop. long temp;//used to store the speed value after changes int counter; void loop() {   // establish variables for duration of the ping,   // and the distance result in inches and centimeters:   long duration, inches, cm;   int tens;   int ones;   long Speed;   // The sensor is triggered by a HIGH pulse of 10 or more microseconds.   // Give a short LOW pulse beforehand to ensure a clean HIGH pulse:   pinMode(trigPin, OUTPUT);   digitalWrite(trigPin, LOW);   delayMicroseconds(2);   digitalWrite(trigPin, HIGH);   delayMicroseconds(10);   digitalWrite(trigPin, LOW);     // Read the signal from the sensor: a HIGH pulse whose   // duration is the time (in microseconds) from the sending   // of the ping to the reception of its echo off of an object.   pinMode(echoPin, INPUT);   duration = pulseIn(echoPin, HIGH);     // convert the time into a distance   inches = microsecondsToInches(duration);   cm = microsecondsToCentimeters(duration);   Speed=distanceOverTime(holder,cm);   holder=cm;//after speed caclulation so take the cm value for another calculation   Speed=abs(Speed);   if(Speed!=0 || counter==10){     temp=Speed;     counter=0;   }else{     counter++;   }   if(temp>=100){    zerofirst();    zerosecond();   }else{     ones=temp%10;     tens=temp/10;   }   if(ones == 0){     zerofirst();   }else if(ones==1){     onefirst();   }else if(ones==2){     twofirst();   }else if(ones==3){     threefirst();   }else if(ones==4){     fourfirst();   }else if(ones==5){     fivefirst();   }else if(ones==6){     sixfirst();   }else if(ones==7){     sevenfirst();   }else if(ones==8){     eightfirst();   }else if(ones==9){     ninefirst();   }   if(tens == 0){     zerosecond();   }else if(tens==1){     onesecond();   }else if(tens==2){     twosecond();   }else if(tens==3){     threesecond();   }else if(tens==4){     foursecond();   }else if(tens==5){     fivesecond();   }else if(tens==6){     sixsecond();   }else if(tens==7){     sevensecond();   }else if(tens==8){     eightsecond();   }else if(tens==9){     ninesecond();   }       Serial.print(inches);   Serial.print(" in, ");   Serial.print(cm);   Serial.print(" cm, ");   Serial.print(Speed);   Serial.print(" mph");   Serial.println();     delay(100); }   long microsecondsToInches(long microseconds) {   // According to Parallax's datasheet for the PING))), there are   // 73.746 microseconds per inch (i.e. sound travels at 1130 feet per   // second).  This gives the distance travelled by the ping, outbound   // and return, so we divide by 2 to get the distance of the obstacle.   // See: http://www.parallax.com/dl/docs/prod/acc/28015-PING-v1.3.pdf   return microseconds / 74 / 2; }   long microsecondsToCentimeters(long microseconds) {   // The speed of sound is 340 m/s or 29 microseconds per centimeter.   // The ping travels out and back, so to find the distance of the   // object we take half of the distance travelled.   return microseconds / 29 / 2; } again, all your help and thought are appricated

Topic by herb1977   |  last reply

solar install question

Ok so I see a few solar setups online. now I have been researching for a while on this and no one can give me the answers so here i go on here. So i want an UPGRADE-ABLE solar setup. right now I have 2 150ah 12v batteries. I have multiple 50 amp charge controllers. so when I buy the solar panels I can plug in and get batteries going no problem.... My issue is the mains voltage side of things. I want to have something like a fuse box, this will have my main breaker and then the independent safety switches. the issue is to do this I need to make sure all my power is on 1 line. so if I buy a few small inverters I will not be able to piggyback them as they tend to go bang. so what type of inverter can I get that will be able to go in parrallel to allow me to get more amps if needed? I am hoping there is one that is infinitely upgradeable just in case. TLDR what type of off-grid inverter allows parrallel connection to other inverters??

Topic by plucas1   |  last reply

3D Print Workshop at a library

We've had a 3D printer at our library for about 6 months now. We would love to offer workshops on how to use software like Tinkercad or 123D to create your own designs. We are currently looking for someone to lead the workshop. Any ideas where we could connect with someone? We are located in Marin County, right next to San Francisco: http://www.beltiblibrary.org/ Many thanks for any suggestions on forums, people to reach out to or even workshop ideas.

Topic by beltibdojo   |  last reply

Common written English errors.

I'll add to this as errors come to my attention. Perhaps this, or someone else's similar post, could be made a sticky - an always available point of consultation distinct from individual requests for, or offers of, help. I have a 2:1 Honours degree in Librarianship and Information Studies, and I also have a City and Guilds Certificate in teaching Adult Literacy. English is my native language. ------------ THERE, THEIR, THEY'RE THERE: Position: "The school is over there."; "There is the temple we have been looking for." Information: "There is a stray dog wandering around the house."; "There is a train leaving in 15 minutes." Slang: "He's not all there." (He is a bit stupid.) THEIR: Exclusively belonging to someone or something - no other meaning. "The coats are theirs." (the coats belong to them); "This is their car." (the car belongs to them); "Fords are OK, but their brakes can be spongy." (the brakes belonging to Ford cars can be spongy). THEY'RE: Short for "They are..." "Try some, they're very tasty."; "Surely they're not ending the gig without playing "Us and Them"?" A spellchecker may not locate words that are spelled correctly but used incorrectly. "My car is over their." is wrong usage, but the word, "their" is spelled correctly. A grammar checker may or may not locate such errors. (Microsoft Word 2007 combines spellcheck and grammar check, and does find such errors, offering the correct "there" as a replacement. -------------------- ITS, IT'S: ITS: Belonging to. "The pedal on the left is its clutch pedal." (the left pedal is the clutch belonging to the car - "its" = "the car's"); "Its mechanism is a bit fiddly, and poorly designed." (the mechanism belonging to something not explicitly mentioned is fiddly and poorly designed). IT'S: Short for "it is". "It's raining."; "It's cold."; "It's quite warm for November." -------------------- YOUR, YOU'RE YOUR: Ownership. "That is your car."; "Your instructions are misleading."; "What was your day like?" YOU'RE: Short for "you are". "You're wrong about that, it's the other way around."; "You're pulling my leg, that's not even remotely possible." -------------------- THAN, THEN THAN: Comparative. "My car is better than yours."; "I feel better than I did yesterday."; "I would sooner be there than sitting here doing nothing." THEN: Sequence; "Add an egg, then whisk until fluffy."; "Go to the corner, then turn right." Also colloquially, "Then again, I might decide to fly, after all."; "What's all this about, then?" Usual error is "then" instead of "than". I've never seen it the other around. Becoming more common, and it has appeared as the only error in a good few Instructables. -------------------- SHOULD OF, COULD OF, WOULD OF, etc. All simply wrong. They do not exist in English, and are misheard shortenings of "should have" (should've (sounds like "should of")), "could have" (could've), "would have" (would've), etc. -------------------- TO, TOO, TOO TO: "It's time to go to school."; "Let's go to the cinema."; Hi ho, hi ho, it's off to work we go." TOO Also\as well. "I'm coming, too."; "I, too, use Linux Mint." TOO Excessive. "That's far too much for me!", "You go, if you like, but I think it's too expensive to get in." -------------------- THE APOSTROPHE The apostrophe does a few unconnected things. Indicates ownership: "The dog's bowl." (The bowl belonging to the dog.); "That pink collar is the cat's." (That pink collar belongs to the cat.); "Microsoft's Windows 7 is the best Operating System." (The Operating System belonging to Microsoft.) Indicates missing letters: "They're" (They are); "Can't" (cannot); "I'bles" (Instructables). To indicate ownership of a plural that ends in "s", or pronoun (name) just add the apostrophe at the end without any additional "s": "The ship's (a single ship) colours have been changed to red and grey." "The ships' (all the ships in the fleet) colours have been changed to red and grey." (Else you would get "ships's"; which Golem might say.) "Mr Jones' car is a Skoda." Not Jones's, although, it seems, it's a matter of preference. My preference is brevity.   BUT an apostrophe NEVER EVER makes a plural, "banana's" is wrong, it's just "bananas"; "goat's" is wrong, it's just "goats". Used this way it could indicate ownership, "The banana's skin is yellow." (The skin belonging to the banana.) Detailed examination at; http://www.eng-lang.co.uk/apostrophe_rules.htm -------------------- DIFFERENT. You will often see "different" used with "than", or "from", or "to". The preference is "from", because one says "it differs from", not "it differs than", or "it differs to". Detailed discussion at; http://grammarist.com/usage/different/ -------------------- "REPLACED WITH", or "REPLACED BY". Both can be correct. See MilkyBarKid's post in a thread at; http://forum.wordreference.com/threads/replaced-with-or-replaced-by.1985166/ -------------------- MISLED, MISLEAD Both are correct, but have different uses. "He was misled by the sneaky salesman." "The sneaky salesman tried to mislead him." -------------------- LESS, FEWER Fewer is used when individual things or people are being referred to; cars, telephones, knives, people, churches. Less is used when things being referred to cannot be counted or don't have plurals; traffic, communication, cutlery, worship. Fewer cars mean less traffic. -------------------- If you have any particular points or questions, I'll be glad to research and post.

Topic by FirstSpear   |  last reply

what would be a good material to make poker chips?

Hello everyone, as part of my new poker table project i decided to make also the chips.  what materials would you reccomend me to work with, knowing that i dont have a workshop. (i was thinking about concrete). would really like to hear your thoughts and opinions best regards. yarin

Topic by yarin shabatov   |  last reply

Using Neutron radiation from Aluminum foil is this Legal to do?

I am wondering if I expose plants to Neutron radiation and carefully burn them afterwords.at 500 deg C is this safe and more importantly is it Legal?? I plan to use a 4% thorium Rod (Welding Rod). What about Beta and gamma radiation is this Legal. I heard on youtube it is as long as you Properly dispose of the seeds.  I did a similar Project with clover a few cm away from a total of 20,000 volts 35 mA power supply and dosages above 400 volts per meter squared killed the clover plants very quickly. I sterilized the soil and seeds with bleach and incinerate it with High heat 500-600 degrees C. I washed by draining most of the bleach out of the seeds.

Topic by SHOE0007   |  last reply

Classes now in the recent answers section!?

Not sure if it is supposed to be a feature or a bug: The recent answers are now filling up with classes, which I find rather annoying. Someone asks a question in these online classes and the whole thing shows up with the description, enrolment and all. Even if were to answer the question I would still need to scroll through all of it, go through all answers so far to find the last one and then.... If that keeps going the answers section will be flooded by classes for no reason that I can think of :(

Topic by Downunder35m   |  last reply

cant see all comments

Hello,  I cant see all the comments in this theme https://www.instructables.com/id/Mega-Prusa-i3-Rework-8-x-Build-Volume/ statistic buttons says, that the theme contains 1423 comments, but the "More Comments" button works only at first press. I am able to see only last 65 comments.  can you fix that please ? regards :) 

Topic by luuxiii   |  last reply

HDMI from LCD connector

Hi, At work I have an ultrasonic testing instrument that displays the signal on an LCD (640x480). I also have a HUD (head mounted display) that requires a HDMI input. The only way I can think of getting the 2 working is to put a camera over the display and send that to the HUD. Would anyone know of a way to connect something to the LCD ribbon directly and convert it to HDMI? Many thanks for any help provided.

Topic by mknorr   |  last reply

LED indicator for A/V selector

Hi! A while ago, i made an A/V selector, and it worked quite well. It had a small design issue, which is, having the ports at the front, where the switches are, and I want to upgrade it a little bit. The idea is, put on the front the switches with a LED on each input, and when I switch the selected input, the selected LED will also light. I've been looking around, and the A/V voltages are around 1 volt. The switch I have, it can handle 3 circuits at the same time (Video, Left and Right) but it has 3 rows as a conmutator or something. The thing is, i need your help in order to connect the LED. I've been thinking about using the unused row of the switch, but I don't know how, or, place a transistor when the Video input comes across the switch, but I don't know what kind of transistor will do. Thanks in advance I attach a diagram of what is now, with 5 inputs, showing only 2 of them, to have a brief idea

Topic by jimmytvf   |  last reply


So, i'm a star wars fan for some time now and I've always wanted to start on a dream project, i wanted to create a real life Star Wars Speeder, having the technology that we have right now i think it's possible, now the thing is, i need to find a motor(s) big enough to lift a 185lbs guy off the floor, i don't really want it to fly like an airplane but more like hover a few feet off the ground, maybe 2 or 3 feet and make it move forward... for forward movement i'm thinking of the concept of thrust vectoring. i'm still on the planning/drawing stages of it... any suggestions from the experts??? 

Topic by somedumbguy1274   |  last reply

LED Dream BAll how can I fix this? Or rig it differently?

I have (3) of these LED DREAM Ball lights that come with a remote to change colors all three of stopped working, Im thinking its the base that gives out- but what other light source could I put inside of it to make it work again?

Topic by franklydoreen   |  last reply

9 - Step Origami

NOTE: try guessing the final result before reaching the last step.

Topic by JoudA1 

mobile instructables

A mobile version if instructables like m.myspace.com or slashdot.org/palm or something simmilar

Topic by fwjs28   |  last reply

circuit board repair question

This little audio input jack broke off a circuit board.  I'm wondering if anyone knows what I need to do to fix it? You can see that there are 4 metal connectors which I assume a soldiering iron can easily fix.  But there is also an orange strip that snapped off of the little orange baseball home plate-shaped tab on the bottom of the jack.  Does anyone know what that is and the best way to repair it?  (The loose strand is right by where it says "CN6" on the board) I don't know anything about circuitry but was going to borrow a friend's soldiering iron. Thanks to anyone who can point me in the right direction! Phillip

Topic by pmottern   |  last reply

comment construire un billard soi même pas à pas

Bonjour à vous!  Je voudrais fabriquer un billard ou un snooker fait maison, mais je ne sais pas comment faire. Pouvez vous s'il vous plait m'expliquer la procédure de construction pas à pas?

Topic by Lemythique 

Trouble with multiple entries in a contest?

So I wanted to enter two projects into the current Metal contest.  I entered one without a problem, but my second instructable for whatever reason can't be entered.  It is eligible for contest entries as far as I know.  When I'm on the page it will allow me to submit in other contests, just not the metal contest.  I checked the official rules and under section B, paragraph 3 the rules state that multiple entries are allowed, though only one entrant can win a prize.  So then, why can't I enter another recent instructable?  

Topic by work_simple   |  last reply

PDF is not updating when editing the instructable

Hi guys. I've noticed that the PDF version of the instructable does not update when I edit it. Here is an example: https://www.instructables.com/id/Pocket-Synth-Briefcase-V2/ when I click "Download", the PDF file contains content, that was published the first time. None of my edits are reflected in there. Pretty sure it's a server side problem, but just in case I'm using Chrome Version 61.0.3163.100 on MacOS 10.12.6.

Topic by rzinurov   |  last reply

Placing a "WINNER" Mark on instructables that won a challenge or contest

Don't you find it a good idea to easily identify instructables that were able to win a contest or challenge? Maybe a good idea is to place a "WINNER" Mark on these instructables. The idea is similar to those featured instructables that is marked as "FEATURED"

Topic by milcarlsandoval   |  last reply


BABYDUINO WHICH IS SHRINKIFIED ARDUINO IS FOR SALE!!! IF YOU WANT TO BUY IT PLEASE EMAIL AT: pateldarshil14@rediff.com For Further Instructions about Product see: https://www.instructables.com/id/Robotics-and-Automation-Shrinked-With-BABYDUINO/

Topic by Patel Darshil   |  last reply

Can I give out my 3 month Premium memberships to my students?

Hello everyone, I'm going to host two workshops in my college, one on CAE n collaboration with SimScale and another on CAD in association with Autodesk. Can I give out my premium memberships to the top participants of my workshop? Will it be a good idea?

Topic by alamtania   |  last reply

Introducing the fastest, smartest and simplest way to code Arduino!

Hello Everyone! I would like to present a new website for coding Arduino: www.Cherpa.io This website allows users to code arduino online, but it has these cool new features: - Visualization: There's a dashboard where users can add visualization elements like a gauge, barmeter, graph to visualize data from arduino and controllers like buttons, sliders..to control the circuit and move servo motors for example. - Chatbot: A new chatbot is introduced to answer all electronics related questions. Its still new and learning every day. - Auto-complete for arduino. - You can upload and save your code online in your profile. Here is a video that demonstrates what im talking about: https://www.youtube.com/watch?v=mwTggv5V3Uw I would love to hear your thoughts, an any suggestions! Have a great day :D

Topic by IbrahimE16   |  last reply

Night vision surveillance

Hi, I made a surveillance system out of 2 cheap web cameras. It works perfect, but night is the problem. I need to make it possible to record during night. I can't buy some professional IR cameras right now, but I got new neighbor who makes problems, and he is the reason why I am doing this. I found in local shop some IR diodes "100pcs 5mm 940nm IR" which cost about 5€. Are they good for my needs? They have to cover about 5-6m outdoor. And can I use them for my cheap web cameras? Any suggestion is welcome, need your help, or soon my stuff around a house will disappear!

Topic by AdvanŽ   |  last reply


Can any body help me to connect rain detector by  pic16f887. i am close to programmimng but not work well. can any body share any idead?

Topic by PrashantV24   |  last reply

I think I inhaled a bit of cement dust...

Although I did my mixing outside (on a semi-rainy day) and held my breath while pouring the cement powder, I think I might have inhaled a tiny bit. Not a lot, but enough for a bit of coughing afterwards. The coughing is over, but my throat now feels slightly sore, but not bad enough that I want to contact a doctor. Mostly just a bit irritated, that I hope will pass. But can I eat or drink anything that might help this pass quicker? For lubricating the throat or something. Or will it go away eventually?

Topic by Mikki G.W   |  last reply

Analog and Digital Inputs for Teensy 3.2 MIDI Programming within Arduino

Been having some trouble with programming my custom potentiometers for my midi controller. I have 12 buttons and 6 knobs. I have it wired correctly and have the sanwa arcade buttons working fine. I'm just having a huge problem adding analog code to my digital code. I'm not sure where to go from here, I have tried over 20 different types of analog code and I'm not sure what I'm doing wrong. Just need a basic potentiometer for reading MIDI. I have the first 1-12 digital inputs on my teensy soldered in for my arcade buttons. For the analog potentiometers I have them soldered on inputs 18-23 or (A4 thru A9) on the Teensy 3.2. I am using Arduino software along with the Teensy loader. Any help would be greatly appreciated, thank you. Here is the code I have thus far. I only have the 19 and 23 analog inputs written in this one at the very end, because I removed the others.  ******** /* Buttons to USB MIDI Example    You must select MIDI from the "Tools > USB Type" menu    To view the raw MIDI data on Linux: aseqdump -p "Teensy MIDI"    This example code is in the public domain. */ #include // the MIDI channel number to send messages const int channel = 1; // Create Bounce objects for each button.  The Bounce object // automatically deals with contact chatter or "bounce", and // it makes detecting changes very simple. Bounce button1 = Bounce(1, 5);  // 5 = 5 ms debounce time Bounce button2 = Bounce(2, 5);  // which is appropriate for good Bounce button3 = Bounce(3, 5);  // quality mechanical pushbuttons Bounce button4 = Bounce(4, 5); Bounce button5 = Bounce(5, 5);  // if a button is too "sensitive" Bounce button6 = Bounce(6, 5);  // to rapid touch, you can Bounce button7 = Bounce(7, 5);  // increase this time. Bounce button8 = Bounce(8, 5); Bounce button9 = Bounce(9, 5); Bounce button10 = Bounce(10, 5); Bounce button11 = Bounce(11, 5); Bounce button12 = Bounce(12, 5); void setup() {   // Configure the pins for input mode with pullup resistors.   // The pushbuttons connect from each pin to ground.  When   // the button is pressed, the pin reads LOW because the button   // shorts it to ground.  When released, the pin reads HIGH   // because the pullup resistor connects to +5 volts inside   // the chip.  LOW for "on", and HIGH for "off" may seem   // backwards, but using the on-chip pullup resistors is very   // convenient.  The scheme is called "active low", and it's   // very commonly used in electronics... so much that the chip   // has built-in pullup resistors!   pinMode(1, INPUT_PULLUP);   pinMode(2, INPUT_PULLUP);   pinMode(3, INPUT_PULLUP);   pinMode(4, INPUT_PULLUP);   pinMode(5, INPUT_PULLUP);   pinMode(6, INPUT_PULLUP);  // Teensy++ 2.0 LED, may need 1k resistor pullup   pinMode(7, INPUT_PULLUP);   pinMode(8, INPUT_PULLUP);   pinMode(9, INPUT_PULLUP);   pinMode(10, INPUT_PULLUP);   pinMode(11, INPUT_PULLUP);   pinMode(12, INPUT_PULLUP);// Teensy 2.0 LED, may need 1k resistor pullup } void loop() {   // Update all the buttons.  There should not be any long   // delays in loop(), so this runs repetitively at a rate   // faster than the buttons could be pressed and released.   button1.update();   button2.update();   button3.update();   button4.update();   button5.update();   button6.update();   button7.update();   button8.update();   button9.update();   button10.update();   button11.update();   button12.update();   // Check each button for "falling" edge.   // Send a MIDI Note On message when each button presses   // Update the Joystick buttons only upon changes.   // falling = high (not pressed - voltage from pullup resistor)   //           to low (pressed - button connects pin to ground)   if (button1.fallingEdge()) {     usbMIDI.sendNoteOn(61, 99, channel);  // 61 = C#4   }   if (button2.fallingEdge()) {     usbMIDI.sendNoteOn(62, 99, channel);  // 62 = D4   }   if (button3.fallingEdge()) {     usbMIDI.sendNoteOn(63, 99, channel);  // 63 = D#4   }   if (button4.fallingEdge()) {     usbMIDI.sendNoteOn(64, 99, channel);  // 64 = E4   }   if (button5.fallingEdge()) {     usbMIDI.sendNoteOn(65, 99, channel);  // 65 = F4   }   if (button6.fallingEdge()) {     usbMIDI.sendNoteOn(66, 99, channel);  // 66 = F#4   }   if (button7.fallingEdge()) {     usbMIDI.sendNoteOn(67, 99, channel);  // 67 = G4   }   if (button8.fallingEdge()) {     usbMIDI.sendNoteOn(68, 99, channel);  // 68 = G#4   }   if (button9.fallingEdge()) {     usbMIDI.sendNoteOn(69, 99, channel);  // 69 = A5   }   if (button10.fallingEdge()) {     usbMIDI.sendNoteOn(70, 99, channel);  // 70 = A#5   }   if (button11.fallingEdge()) {     usbMIDI.sendNoteOn(71, 99, channel);  // 71 = B5   }   if (button12.fallingEdge()) {     usbMIDI.sendNoteOn(72, 99, channel);  // 72 = C4   // Check each button for "rising" edge   // Send a MIDI Note Off message when each button releases   // For many types of projects, you only care when the button   // is pressed and the release isn't needed.   // rising = low (pressed - button connects pin to ground)   //          to high (not pressed - voltage from pullup resistor)    }   if (button1.risingEdge()) {     usbMIDI.sendNoteOff(61, 0, channel);  // 61 = C#4   }   if (button2.risingEdge()) {     usbMIDI.sendNoteOff(62, 0, channel);  // 62 = D4   }   if (button3.risingEdge()) {     usbMIDI.sendNoteOff(63, 0, channel);  // 63 = D#4   }   if (button4.risingEdge()) {     usbMIDI.sendNoteOff(64, 0, channel);  // 64 = E4   }   if (button5.risingEdge()) {     usbMIDI.sendNoteOff(65, 0, channel);  // 65 = F4   }   if (button6.risingEdge()) {     usbMIDI.sendNoteOff(66, 0, channel);  // 66 = F#4   }   if (button7.risingEdge()) {     usbMIDI.sendNoteOff(67, 0, channel);  // 67 = G4   }   if (button8.risingEdge()) {     usbMIDI.sendNoteOff(68, 0, channel);  // 68 = G#4   }   if (button9.risingEdge()) {     usbMIDI.sendNoteOff(69, 0, channel);  // 69 = A5   }   if (button10.risingEdge()) {     usbMIDI.sendNoteOff(70, 0, channel);  // 70 = A#5   }   if (button11.risingEdge()) {     usbMIDI.sendNoteOff(71, 0, channel);  // 71 = B5   }   if (button12.risingEdge()) {     usbMIDI.sendNoteOff(72, 0, channel);  // 72 = C4   // MIDI Controllers should discard incoming MIDI messages.   // http://forum.pjrc.com/threads/24179-Teensy-3-Ableton-Analog-CC-causes-midi-crash   while (usbMIDI.read()) {     // ignore incoming messages   } } // read the input on analog pin 19:   int sensorValue = analogRead(A5);   // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):   float voltage = sensorValue * (5.0 / 1023.0);   // print out the value you read:   Serial.println(voltage); } // read the input on analog pin 23:   int sensorValue = analogRead(A9);   // Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):   float voltage = sensorValue * (5.0 / 1023.0);   // print out the value you read:

Topic by abissmusic   |  last reply

Ofslides ible poaching

I ran across this site that has republished my ibles with no link to the original content. I've asked them to remove it. I'm guessing one person has taken and republished it there under my username. I thought some others might want to check to see if their ibles had been copied as well.  http://ofslides.com/brooklyntonia-487028

Topic by Brooklyntonia   |  last reply

Need help driving a wheel with a 180 degree servo

So for a Electrical Engineering class I have we were given a challenge, to design a robot that can go a certain distance on carpet using only servos and 3d printing (and any sensors we would like to use). I want to know if anyone could tell me if it would be possible to drive a wheel using only a servo. Maybe the same type of drive that trains use? If someone has any ideas that could help I would appreciate it. 

Topic by ebailey-kelly   |  last reply

Pawpaw - to eat or not to eat?

Now that the tree in the backyard is showing first signs of fruits developing I was able to determine that it is a pawpaw tree. After my first surprise that I might enjoy some nice and delicious fruits this summer I asked my friend Google for more details. Shouldn't have done that.... I think in the Us the family of these are usually refered to as Asimina. The bad thing is I now know that not only the tree itself, the leaves and seeds contain Annonacin but the flesh of the fruit too. In some research documents the found levels in the fruits seem to by sky high :( People trying the fruit for the first time are usually totally over the moon due to the new tase or get adverse reactions right away. After a season of eating the fruits several times a week most people claim they now longer can stand their taste and if they try anyway they regret it quickly. The health benefits are quite obvious if you only think of the good stuff in it, but what to do with the levels of Annonacin accumulating in your body and causing vital neurons in your brain to suffer permanant damage and death? As the tree is native to the US I quickly found that the indiginous tribes widely used both the leaves and fruits. But I was unable to find any info on how much, how often or if the fruits were treated in some way to get rid of the toxins. One way or the other I have to teste them once ripe and ready but if I do like them I would love to able to continue eating without loosing the rest of my insanity ;) Anyone eating them on a regular base? Suffering from side effects? Already over it for some reason? Let me know! :)

Topic by Downunder35m   |  last reply

pcb schema of 8 layers

Hi please help me to find a schema of 8 layers.I have a training on a multilayer circuit board machine tnx

Topic by khedidja elmestari 

Different Modes and Arduino?

Hello! I had a question.  I want to have like 5 buttons and every time I press one button it runs a certain block of code over and over until I press another button. This way I can have different modes etc. mode 1, mode 2. . . Can somebody help me with the code please? Thanks

Topic by HavocRC   |  last reply

Beginner Arduino Basic LCD + rotary encoders

New to Arduino, attempting to get basic programs working. Whats the best way to include multiple sensor readings to appear on a LCD Arduino screen for user feedback. So the sensor readout on the LCD would switch to the most recent change of rotation. Code to examine or help in the right direction would be appreciated. Thanks

Topic by Prime01   |  last reply

sudden infant death syndrome, baby breath monitor

Hello everyone, I am a first year Mechatronics engineering student. Well, I don't know where to ask about such stuff, but my question is: As a new oncle, I see my brother & wife worried about the sudden infant death syndrome, so like the baby stop breathing when his sleeping, so like every time he coughs or so, they get really stressed. For such a reason, I want to develop for them a 'breath monitor system' For that, how shoud I proceed ? should I use pressure sensor under him, to know if he is breathing or not, then if he isn't, make an 'alarm signal' ? Or.. some t-shirt / 'chest wearable' he wear, to see if his chest is moving, or not ? is it simple enough that I can learn about arduino / sensors & do it alone ?  I had many questions.. hope I ll get some answers Many thanks !

Topic by AmineAz   |  last reply

Servo SM-S4304R

After long time of searching, without success, i would like some help. I purchased one Sm-s4303r servo motor. My questions are: 1.How can i do it work for 3 seconds at normal speed and to stop it for example 12hours. To work 2 times per day. 2.What will be the suitable servo which can do 180° in every movement. I mean 180° now and the second (to complete the cycle 360) in 10 hours.. I would be glad if somebody could help me. Thanks, Chris

Topic by chris__p   |  last reply

Ya'll! I finally am in my new house and have my knex back!

Hey guys! I can finally get back modding nerf guns and making knex guns! If you have any suggestions for nerf mods or knex guns Please put them down in the comments. Also, it was my birthday on October 12th! And another thing. Sorry if my knex creations for a while are bad block triggers or something, I haven't had practice with knex in heck, 4-5 months?

Topic by tinyhooman 

Contest: can i join?

Hi, i have this question because in the official rules of every contest there is a list of elegible countries but Italy is not mentioned. My question is: Can Italians join a contest?

Topic by francy91   |  last reply

anyone teaching how to make coco peat shredder / separator machine?

Anyone teaching how to make coco peat shredder / separator machine? i saw a lot of video showing it off on youtube but no one is actually teaching it. i would really like to learn how to DIY one, since i like planting and stuff and need coco peat but it is quite expensive here.

Topic by MosesL6   |  last reply

We are LIVE!!! - Knex Flux - General purpose Knex forum

Knex Flux is live now, you can visit it here: http://knexflux.net So, I randomly had that idea and Sandro likes it too and stuff, so yeah, is there any demand for a general-purpose knex forum uniting all the parts of the knex community under one hood? Of course such a forum would need people who actually use it, thus me asking if it would be used ^.^ I could do the hosting, I know my way around such stuff :) This would be in particular good for sharing progress, which isn't really possible on instructables, sharing small projects you don't think are worth a whole new instructable, helping others out and of course all just having a fun time together!

Topic by Sorunome   |  last reply

Anything but Knex...

I understand that knex are kinda cool and they have their place here on instructables. But to me it's getting kind of ridiculous. Just trying to browse through the instructables and find a useful one is pretty difficult now. I find a few useful ones here and there but in between them all are knex instructables. I think it's rather irritating to have to scroll past hundreds of instructables all for a different way to make a knex gun. Is there any way to browse with everything but the knex instructables? To be fair.. yes i'm exaggerating it's probably more like a 50/50 knex/non-knex ratio.

Topic by daemonkrog   |  last reply


Im selling my knex. i dont want it £30-£50'd be nice :) only people in the midlands in england please it weighs about 9kg lemme know. slow to respond as i'll be on holiday tomorrow.

Topic by j-chode!   |  last reply

Bearing/fulcrum for a pendulum

I want to swing a locket on a chain like a pendulum and I want to minmise the friction experienced where the chain attaches to the supporting post. What sort of bearing or similar device should I use for this? Ideally it should be available in a bronze/dirty brass colour but I guess I can deal with it if it isn't.

Topic by THX 1138   |  last reply

dosimeter, how to

Any body have a simple way to build one cheap 70 120 db requirement

Topic by metalglue   |  last reply

Space Related Instructable - Atmosphere/Pressure Sensors

I am really into rocketry, aerospace engineering and space in general. I have met a few people at my college that are somewhat interested in the same but dont know alot about it. So i thought i could build a few different environment sensors like the astronauts use to simulate/demonstrate a few basics. For example i wanted to build a few different sensors. But i cant find any instructables to teach me how to make these....Can anyone help or can anyone direct me to a few instructables that could be used to tweak to work for this purpose? - To help show how the astronauts have to regulate their atmosphere in the ISS or even explain how we don't breathe just oxygen - we breathe a combination of O2 and Nitrogen since Earth's atmosphere is mostly nitrogen. O2 (oxygen) Sensor CO2 (Carbon Dioxide) Sensor N (nitrogen) sensor Display to show all sensor data - To help show how they manage pressure in the ISS and have it regulated by an airlock. Atmospheric Pressure Sensor and Display

Topic by acadena2   |  last reply

Preparedness:: Survival:: Game for Kids/adults

The Girls Scouts are hosting an Earth Day event that is about preparedness and the skills needed to be a survivor.  I'm trying to create stations or booths with different skills for students and adults to try or learn.  For example, one station will be learning knots.  Another station will have simple materials for participants to make a makeshift shelter. I need ideas that are fairly simple to teach or show at that stations that can be done in less than 10 minutes. I'm also interested in a game. Thank you.

Topic by tillytoo9   |  last reply