Topics


Where did Contest go

Where did (Let it glow) contest go ? judging ended on 10 January 2015...we are still waiting for results, but where are the entries? where is the contest itself? why totally vanished from this website ? 

Topic by goldenshuttle    |  last reply


Instructables Windows Phone App

I think that it would be really nice to see an instructables app in the windows phone store, with the windows phone platform growing and becoming more and more successful, I think that a lot of users would be really excited to see an app developed for the windows phone users! Hope this is a possibility because I would really love to see a windows phone app. If progress is currently underway and the app is being developed that would be great, but otherwise I hope that someone will start making one soon.

Topic by shotgunshane  


Is there a way to change betwen two 3.5mm audio ports with only one switch? Answered

[404:details not found] Is there a way to change betwen two 3.5mm audio ports with only one switch?

Question by Ro_Usr    |  last reply


SemiFlex filament on Printrbot simple metal

 I just wanted to start a thread to check if anyone has had experience using SemiFlex on a Printrbot simple metal .. Basically there are a couple of  hacks to modify extrusion, something similar to the ones implemented to print NinjaFlex(https://www.youtube.com/watch?v=2EAOJjQMxFE)..Thanks Also suggest a semiflex filament brand if you have had experience with any ..

Topic by CJA3D  


VECTOR then To STL. Then to model

Behind on a project. Loooking for someone expireinced to turn a photo into a STL. File for 3D model. three sizes 2.5" , 1.5" and .75" Seems simple and straightforward but you'll have to see the image DUSTY dustflame415@gmail.com

Topic by DustyB    |  last reply


How to determine which potentiometer I need for this project? Answered

Hi all,  I am building a laptop cooling pad with external power supply, and I would like to include a potentiometer so I could control the speed of the fan rotation. However, I am not sure about the resistance of the potentiometer. I am using the adapter from an old HP printer. Here are the values: +16V, 500mA And I am using the Cooler Master SickleFlow 120 fan. 12VDC, 0.35A

Question by djokenzi    |  last reply


Is it possible to disable a web site link in an answer?

Recoverytoolbox is the site this spammer keeps trying to get everyone to click on. It is a Russian company, probably (and I am just guessing) involved with producing malware. I wouldn't buy the time of day from them much less a program.  So is it possible to disable the web links that they leave as spam in the answers and questions  so they wouldn't work. It might cut down on the annoyance if every piece of spam they put up had the links automatically disabled. In the meantime, DON'T click on their links. It just encourages them to keep spamming us. 

Question by Vyger    |  last reply


Burning Arduino Uno Bootloader

I am planning to burn a bootloader onto an Arduino Uno using a Uno as an ISP. The instructions here: http://arduino.cc/en/Tutorial/ArduinoISP  say to put a 10 mf capacitor between reset and ground. But they to not say which Uno to put the capacitor on. Am I correct that it should be on the Uno to be programmed and not the programmer?

Topic by JRV31    |  last reply



Intel NUC with Old Laptop Screen ?

Hi, I have a Lenovo dead laptop. Is it possible i can connect  Interl NUC Kit with Laptop screen as well as the laptop H.D.D, memory ? Any tips or suggestion would be very helpful. Thanks

Topic by RichiV    |  last reply


Reuse the LED from a TV Question?

I had an LED Tv break and I decided to remove the LEDs out of the TV and reuse them as background LEDs for the new TV.  The issue that I am running into is that I can't figure out how to power them on.  I know they work because i can get a segment of 3 to light up by using wires connected to a 12v battery.  Each strip has 57 LEDs and a 4 wire connector.  I was guessing that this means it is a RGB strip, but there are nothing but +/- symbols on the strip so it is confusing as to what the wire does what on it. I would appreciate any help that anyone may have for me.  

Topic by RyanL3    |  last reply


Where can you find pliatex mold rubber for sale in small amounts? Answered

I am looking for mold rubber for a project of mine. I only need a small amount (1 or 2 oz) but I can can not find anywhere that sells it small amounts.

Question by starforest    |  last reply


woofer connection in a car mp3 player. ? Dos & Donts

I have a car amp with 4 speaker outlets(2L & 2R) can i connect just one woofer to it? if yes then what is the max limit of woofer specification? thanks in advance

Question by ursus thibetanus    |  last reply


how to fix a wired 360 controller cord?

My dog chewed threw my wired xbox 360 controller cord in multiple spots, my question is, can i bypass the round black cylinder closest to the remote, or is it something important?

Question by MichaelH24    |  last reply


What Would You Make With These?

I have a number of these rings. I was given some free fabric samples and these secured them all together, like binder rings but huge. They are 6" across, hinged on one side, with threaded closures along the straight section.  Does anyone have ideas about how to repurpose them? Not much comes to mind except charm necklaces. Maybe something for a Halloween costume?

Topic by starshipminivan    |  last reply


Mechanical ball and socket joints with specified tension? Answered

Okay mechanical engineers: what I am looking for is a ball and socket joint with a tension rating. The idea is to make a lamp that has an adjustable angle fitting for aiming the light. Is there a name for a metal joint composed of a metal ball bearing surrounded by a sleeve (socket) with a determinable amount of friction, adjustable for the weight of the adjoining object?

Question by Nate Cougill    |  last reply


Hello Instructables! I am just asking what the story behind your Instructables robot was!

I just want to know what the story of that cute robot is!

Question by TheAmazingMaker    |  last reply


Controlling 9 Micro Servos with Arduino & Ultrasonic Sensor

Hello! I'm new to Arduino and trying to build a series of moving cogs attached to micro servos, which are triggered by an Arduino controlled Ultrasonic Sensor. My code so far looks like this #include #define trigPin 12 #define echoPin 13 #define CONNECTED_SERVOS 9 // macro just adds two - the first servo is attached to digital pin 2, this gives us upto 12 servos - digital 2 to 13 #define SERVO_TO_PIN(x) (x+2) Servo myServos[CONNECTED_SERVOS]; Servo myservo; void setup() {   Serial.begin (9600);     pinMode(trigPin, OUTPUT);   pinMode(echoPin, INPUT);     // attach the servos   for(int nServo = 0;nServo < CONNECTED_SERVOS;nServo++)   {     myServos[nServo].attach(SERVO_TO_PIN(nServo));   }    } void loop() { int duration, distance,pos=0,i;   digitalWrite(trigPin, LOW);    delayMicroseconds(2);   digitalWrite(trigPin, HIGH);   delayMicroseconds(10);   digitalWrite(trigPin, LOW);   duration = pulseIn(echoPin, HIGH);   distance = (duration/2) / 29.1;    Serial.print(distance);    Serial.println(" cm");   for(int nServo = 0;nServo < CONNECTED_SERVOS;nServo++)   {     if (distance >0 && distance < 30)   {      myServos[nServo].write(180);   }   else{     myServos[nServo].write(180);   }      }          But it isn't really the code that I am having a problem with. I know that I need an external power supply for the 9 servos but I am having difficulty figuring out what is best. I have tried attaching a 9V battery to the power and ground lines of the servos and it hasn't quite supplied enough, only making them move a little when i get closer to the distance sensor, then jittering about a bit before completely stopping. I have got a Switching Power Supply plug that has an output of 12V which I can use and plug directly into the Arduino? I also have voltage regulators that have an output of 5V available. Could somebody recommend how to wire these supplies up for the servos? Any help would be much appreciated!  Thanks

Topic by j_olo    |  last reply


Sort of an LED question....

Every October I organize a Halloween event for Letterboxers in my region. For those who aren't familiar, letterboxing has some similarities with geocaching, which seems to be more well known.... an outdoor treasure hunt thing. Since I don't hide the hiking trail letterboxes until the day of the event I can't give seekers printed clues. Since the hiking starts after dark I have used light -- LEDs -- to direct participants to the boxes. This past October I thought about how neat it would be to fix the LEDs so that they would illuminate only when instructed to do so. Although I want nothing more complicated that for the LEDs to light temporarily when a button is pushed - I figured that this was not a practical option... UNTIL I saw a recent instructable that repurposed TV remotes to activate other items. So, now I'm wondering: A) can I rig up a system whereby LEDs would be lit by some sort of remote control, be it an old TV remote, a phone, or whatever, B) if so, is it something that a fellow such as myself, who is NOT an electronics person but who is very good with instructions, could do, and 3) would it break the bank to set up as many as nine LED "targets" and at least several remotes? I always love the advice I get in these forums... looking forward to hearing from you!!

Topic by Purple Chez    |  last reply


24 volt motor run time

Hi all, We just finished a remote control lawn mower project that utilizes 2 24V wheel chair motors and two wheel chair batteries for drive power. The balde is powered by a gas engine. The unit weighs in at around 260 lbs and is used for some serious slope mowing. The issue I have run into is that I can only get about 1 hour run time before having to recharge. Does anyone have any suggestions as to how to increase the run time without decreasing power? Thanks

Topic by real57vetteguy    |  last reply


Ghost-Instructable - it's there but it's not

I've published a german instructable (https://www.instructables.com/id/EMSA-Gewürzgläser-beschriften). I can find it via google (seraching for "EMSA Gewürzgläser Schriftart" first result entry), but if I look under "You" - "Instructables (1)" it says Puiblished (1) You haven't published any instructables, yet ??? Could it be there are problems with german umlauts in instructable names?

Topic by RobertKuhlmann    |  last reply


puzzle game rubix cube

How to solve 4*4 rubix cube

Topic by ashit.bhagat.3    |  last reply


Can you solve this Riddle?

I have presented this riddle to over a million people and no one has been able to solve it. I posted it in Offbeat and Free Stuff to win a free E-Book so, can you solve this riddle? Riddle me this, riddle me that, the answer is there beneath your hat. When asking a heads or tails type question, when do the answers number greater than seven? Good luck Joe

Question by Josehf Murchison    |  last reply


Pro Membership

Ok, I have had one for a year now and it finally had expired, and I didn't know it so I went on the website and im like "When did they put up all these ads!?!?!?!?!?!?" and I realized oh, yeah. Damn I can't download anything anymore. Has anybody else have had that experience before?

Question by Captain MacTavish    |  last reply


High Frequency Alternators

Look at a picture of some arcs from a common spark-gap Tesla Coil, and then compare it to the arcs from a solid-state. What makes the two so different? The difference comes from the Solid-State Tesla Coil to operate in CW (constant wave) mode. This means that its power supply is uninterrupted, whereas in a spark-gap type, power is being switched on and off hundreds of times per second. If the output terminal of a CW coil doesn't have a brake out point, no corona or spark will occur. For anyone who's investigating wireless power transmission or Tesla's version of radio, this is a very helpful feature, since corona only wastes energy. And if it does have a brake out point, it can create some pretty interesting spark displays, as I mentioned above. An arc to a grounded object increases the current in the arc to such a point that it turns into a white-hot "flaming" discharge. All-in-all, a CW type coil is a pretty interesting kind to observe. But solid-states can be pretty difficult and annoying to build, and expensive as well. Since solid-state technology obviously was not available to Tesla, he found a different way to operate his coils in CW mode- a generator that was specially designed to produce radio-frequency power. He had originally created it for high-frequency arc lighting. Today, I have seen absolutely no coils run by a high frequency alternator. Of course, an alternator would be admittedly difficult to build, but since it could probably deliver more power than a solid-state coil, it would be worth it. Does anyone know if there are any companies that still make these alternators? Would anyone be interested in recreating it? Should we even bother? Thank you for listening. Peace!

Topic by ElectricUmbrella    |  last reply


Tick repellent spray for dogs?

My dog and I go out geocaching often and it brings us to many locations deep in the woods.  Naturally, both her and I pick up dozens of ticks along the way. The dog takes a monthly dose of Frontline and it works.  The ticks bite her and die.  No problems with the medication.  I spray myself with bug spray and there are few issues of ticks getting on me when we're out. The problem is, when we go home she will have ticks on her that I missed and they will crawl off of her and onto me or my wife.  I'll find myself sitting on the couch watching TV or driving to the store and I'll get bit by a tick.  My thinking is that if I can repel ticks from the dog, we will bring less home. Is there a temporary spray that will repel ticks from my dog for 3 or 4 hours while we're out hiking and is compatible with her Frontline medication?

Question by iPodGuy    |  last reply


Turn off auto renew.

Is there a way to turn off the subscription auto renew?  I don't want to be charged when I don't expect it.

Topic by itjmiller    |  last reply


Does anyone have ideas on a rocket mass heater / Stirling engine hybrid?/?

In the beginning stages of my research on different green technologies. these two would seem to mesh well with the correct engineering , but i haven't run across  any examples of it. Your thoughts? Maybe something new may come of this?...

Question by ericb985    |  last reply


Need help building a portable outdoor dance floor

Wanted: plans on how to build a portable outdoor dance floor I've been looking online, and I can't find any actual plans for a portable outdoor dance floor. I'd prefer to make it out of plywood with either parquet or laminate flooring on top. Anyone ever built something like this and would like to share plans? Thanks

Topic by ocelot42    |  last reply


Girl scout cookie recreation help

Hi, I'm trying to recreate the girl scout cookie called "All Abouts" They were discontinued some time ago. I'm sure the cookie bit is a form of short bread but I'm not sure what kind of chocolate or fudge to use or even how to apply it on to the cookie like the image I attached. It doesn't need to be 0 trans fat like the image. Any help would be appreciated, thank you so much.

Topic by Travpena    |  last reply


multiple prepaid master cards

Is it possible to use multiple prepaid master cards to make purchases over 1000 i have no bank account and i dont i can get one right now

Topic by ultra1000    |  last reply


Is this possible?

So a kid walks to and from school everyday, walking uphill both ways without ever going downhill. How is this possible? I want to know what you think. When I get five answers I will tell you mine. My answer is this: His parents are separated and He lives with his Mother at the bottom of a hill. In the morning he walks to school, The school halfway up the hill. After school His mom is at work so he goes to his Fathers house. which is at the top of the hill.

Topic by daredevil499    |  last reply


RFID/NFC computer lock?

I am curious if any of you have an idea for something that could detect a bracelet from 5-10 feet and when it leaves, issue a sleep command to a computer.  I think it would be relatively easy to issue the command from an arduino, but I'm not very sure on which tags and readers to use for the right range.  The idea would be for the computer to automatically sleep/lock when you leave the room.  So what frequencies/types of tags and readers should I look into that will offer a decent range, that is close enough not to loose connection reaching across the desk or walking a few feet across the room, but won't work from a few rooms down the hall, and will interface well with an arduino.

Question by seedorfj    |  last reply


(closed) One year of Pro for quick connect, for MaKey MaKey

MaKey MaKey is an electronic inventor's kit (simple closed connections via USB + music program + fruit = banana piano). More here: http://www.makeymakey.com One problem I've been running into is that it is an additional challenge to rotate quickly between more than one project per MaKey MaKey. The MaKey MaKey has 12 signal pins (female) on the back, pins for ground and 5v outputs, and six pair of alligator clip holes on the board. I've got some ideas on how to make quick connects so that I can freely travel between projects using just a system of male/female connections, where the MaKey MaKey has one type and my projects have the other. Included are some images to get ideas sparking around. If you can post a project detailing one method of a unique quick connect system for MaKey MaKey before the end of February, you're entered. I'll hand out one year of Pro for first place and one 3 month of Pro for second place. I'll choose the winners, but will pay attention to any community feedback. Points don't matter, so points arbitrarily awarded for thriftiness and resourcefulness, creative flair, quality of documentation, and use of MaKey MaKey header pins and other connections. 1st place: 1 year of Pro 2nd place: 3 months of Pro Bonus points for tutorials with resource files and specs that are easily interchangeable between tools, materials, and methods of tech/crafting. Useful formats can include SVG, STL, and others. Here's a couple of projects we got featured that could have really used a quick connect system going on using our laser cutter: Hydrophobic Drum Pad (homepaged, generated 1st place prize for this contest) Music Box (featured, generated 2nd place prize for this contest)

Topic by smalltortoise    |  last reply


Electrical in code?

Hi, I came up with a new way of doing lighting and would like to post it as an Instructable. There's only a slight modification of existing components and standard electrical hardware is used, but I'm concerned I may be called out for possible electrical code violations. Are these checked by the Instructables crew or every project is treated with a warning that anyone using each project needs to be aware of electrical code issues? Thanks.

Question by aeyring    |  last reply


Hydrophobic music, dubstep windchimes, Smash Smash Revolution and etc @ Knox Makers Build Night w/ MaKey MaKey!

Wow, what a month at Knox Makers! We were absolutely invaded by MaKey MaKeys at our hackerspace all throughout January. To start us off, we released a freebie project a little early to help out members and guests get some ideas, to drum up local support for our events, and to offer a fun + easy starter project for the other spaces participating: Oversized Music Chest This ended up getting featured in Electronics! It leaves a lot of room to add extra components and tote the MaKey MaKey around, and we turned ours into a musical advertisement for our first Build Night, a mystery hack night about music. Mystery Hack Night: Music! What a blast! Talk about a weird time.. One family brought a theremin and a circuit bending kit for kids; another group brought an amp and speakers, a suitcase of effect pedals and circuit bent instruments, and a 4 channel mixer; we had a random component table for open hacking; an acoustic and broken ukulele was converted into an electronic instrument; we had painters painting music instrument for the MaKey MaKey with conductive paint; there was a table with our hydrophobic drum pad, bananas, an eggplant, flowers, and a grappling hook all controlling a set of browser based drums through the MaKey MaKey; we had members hooking up tactile buttons and levers to MaKey MaKeys; and we closed with the weirdest jam session this side of Alpha Centauri with all the things playing all the sounds at the same time. Mystery Hack Night: Video Game Controllers! This was a fun night, and we had a few new people show up. We tinkered with a platformer adventure game called Fancy Pants Adventure, where we assigned each person one button. At one point, the whole table was controlling the game's protagonist. Somehow, we made it pretty far into the game, considering. A few people commented that this type of exercise seemed like a really useful team building exercise, so we might look at creating some tutorials with this in mind. We also had individuals and small groups testing out their own inventions and games, again revisiting concepts like conductive ink or simple conductive objects. A two person team tinkered around with some simple fighting games that only use one button for each player, there were people playing Tetris and other games with their inventions, and we again offered a random hack table with an assortment of items and components to rummage through. MaKey MaKey Build Night I: When MaKeys Attack.. We had a nice turnout for this event. This was an introduction to the basic concept behind MaKey MaKey, how to remap the beta v1.2 boards using the web remapper, different applications that make a MaKey MaKey naturally awesome to use, and a few sample projects. We opened up the floor to open hacking, and that day our Adafruit group buy had just come in. We were able to add to the random hack table some awesome components, such as: male/male and female/female jumper wires, various diffused LEDs, slow and fast cycling LEDs, conductive thread, flat LED panels, sewable LEDs, tactile buttons, and other items. We wrapped up and one of our newest members stayed late to craft a thin copper wire into a flat copper instrument using a mallet. He ended up using a breadboard with the MaKey MaKey and Wolfram software to write his own music program. As with our other Build Night events this month, we also had people working on side projects in the background which added to the creative energy of the room. For this event, one of our members tested out a Gocupi that managed to draw Rear Admiral Grace Hopper and Albert Einstein on the whiteboard in dry erase marker using continuous lines. MaKey MaKey Build Night II: Big Projects! We had a decent turnout for this event, but mostly the attendees were there for their own big projects unrelated to MaKey MaKey. We got a few MaKey MaKey projects in around good company, though. We had members working on a large geodesic Airolite boat, someone showed up to work on their 3D printer and print out their first scale model of a scanned person, our Facilities Director was able to get some critical inventory done, a couple members mounted new shelves that had been donated that day, and one member's daughter wanted to play around with hydrophobics. We also were able to get electronic musical wind chimes made that work very nicely with the MaKey MaKey, and the same member who tinkered with Wolfram software at the prior event made more progress on some of his own MaKey MaKey ideas. MaKey MaKey Build Night III: Advanced Reprogramming! This was one of the build nights I was most excited about, and we had a nice turnout. We walked members through reprogramming the older MaKey MaKeys using the MaKey MaKey sketch for Arduino IDE. We bested Windows and its infernal resistance to unsigned 3rd party drivers, and we advanced onward. We looked at basic reprogramming of the settings.h key bindings, and we also looked at other Arduino programming such as delay, Keyboard.print, Keyboard.press, Keyboard.release, and some other concepts. A father team duo that are also involved in a local high school robotics club showed up and schooled us a little on Arduino with some tricks they had up their sleeves, another father son duo showed up to experience the MaKey MaKey for the first time together and it seemed to blow their minds, and we talked about the new web remapping tool for the beta v1.2 boards. Mad Science Bingo For one of our educational outreach events, we attended hijacked bingo night at a local senior citizen community center. We let everyone have their bingo fun without interruption, but as bingo concluded we invaded with a MaKey MaKey, our hydrophobic drum pad, fruits and veggies, and some flowers. The senior citizens loved it and have invited us back. At one point, we had three participants record themselves singing into a Scratch program that we mapped to the flowers. The room erupted with laughter when the community center manager went to touch the flowers and they sang at her in her patrons' voices. She even lent her voice to be recorded, which sent the room into mad howls. We also made a chain of about dozen people between ground and the triggers. We didn't really invent anything unique here, but it was a fun bonus event for the community center patrons. We ended up tinkering around a little with hydrophobics and electronics. So far after all our events, we ended up with a few more Build Night projects: Hydrophobic Drum Pad (featured in Science and then Homepaged!) annoy friends with this party game: Wonky Pong Smash Smash Revolution ... black acrylic, conductive paint, and conductive thread Electronic Windchimes sewable Cardboard Feet DDR (featured in Video Games!) We've also set out our MaKey MaKey kits for space use now that our January Build Nights are over with. We have a few members with projects they are still working on at the space, a few projects that are still being documented to upload to Instructables, and a few people batting around their own ideas. If we come up with anything else, we'll be sure and update. A couple "lessons learned" here: Random hack tables are awesome. But.. if they are too chaotic and without the right presentation, these can be intimidating to beginners that may want more direction. Multiple Build Nights rule! But.. it is probably best not to hijack every Saturday of a shared workspace like a hackerspace. This could have been orchestrated a little better (my fault). Overall, this was a blast to participate in. Thanks to Joylabz and Instructables! PS.. with two features and one homepage, that gave us 1 and a half years of Pro. One got used, but we're giving away the remaining year of Pro and 3 months of Pro. The bounty: quick connect projects for MaKey MaKey. Ends 3/1 EST. You know what to do..

Topic by smalltortoise  


Dear admins, please edit my latest.

Dear instructables, I've written a new one (Arduino Tetris) that's saved to my drafts.  My first page has an instagram video of the game in action. Sadly I'm not a Pro account, so I can't embed the video myself.  Could you please make that happen so I can publish? It's too bad I didn't post faster in the past when I was given pro and didn't use it.  Ah, well. Attached is a picture that's in the instructable, so you know which one I'm talking about. Thank you!

Topic by aggrav8d    |  last reply


Growduino Help?

Hello Everyone, I built a growduino for my dwarf citrus tree. I have an serial LCD display, a pushbutton switch to turn the screen on and off. I also have a couple of relays and LED's. I wanted to see if someone would take a look at my code, and help me figure out why the screen doesn't display my float variables? I've been banging my head against the wall trying to figure it out. Any help is appreciated. Some of the math formulas I have below were customily made to display the format in degree's F, and a moisture value of 0-10. Feel free to ask questions. I will upload a few photos of it later today. Also if it is easier, I can send you my code in .ino format as well. Thank you for your help in advance. Chris #include #include const int TxPin = 2;          //the lcd const int pushButton = 5;     // the number of the pushbutton pin const int redLed =  13; const int blueLed =  12; int val = 0;                    // variable for reading the pin status SoftwareSerial mySerial = SoftwareSerial(255, TxPin);  //initialize LCD and bring in library //Analog Input int moistureSensor1 = 0; int moistureSensor2 = 1;                                                                                     int moistureSensor3 = 2; int moistureSensor4 = 3; int tempSensor = 5; //Digital Input... int waterPump = 8; int heater = 7; //Initialize int variable to store values int moisture_value1; int moisture_value2; int moisture_value3; int moisture_value4; int temp_val; int buttonState = 0;  void setup() { //Open serial port   mySerial.begin(9600);      //intialize LCD     pinMode(TxPin, OUTPUT);     digitalWrite(TxPin, HIGH);         //initialize button depress       pinMode(pushButton, INPUT);     // declare pushButton as input         //initialize and start it turned off..     pinMode (blueLed, OUTPUT);                                                                   pinMode (waterPump, OUTPUT);     pinMode (heater, OUTPUT);     pinMode (redLed, OUTPUT);                                                                                                                      //Not sure if I needed to make these inputs, since I want a reading from them? pinMode(moistureSensor1, INPUT); pinMode(moistureSensor2, INPUT); pinMode(moistureSensor3, INPUT); pinMode(moistureSensor4, INPUT); pinMode(tempSensor, INPUT);        digitalWrite (blueLed, LOW);     digitalWrite (waterPump, LOW);     digitalWrite (heater, LOW);     digitalWrite (redLed, LOW); } void loop() { for(int n=0; n < 3; n++);   {                   // nested loop.. checks for 3 days for(int i=0; i<= 86400; i++);{                 //checks for 1 day. 86400 is how many seconds in a day   delay(1000);       buttonState = digitalRead(pushButton);        // read the state of the pushbutton value:   // check if the pushbutton is pressed.   // if it is, the buttonState is HIGH:   if (buttonState == HIGH) {                                                                           //tells it to do something when pushed moisture_value1 = analogRead(moistureSensor1);                                                     // read the value from the moisture-sensing probes moisture_value2 = analogRead(moistureSensor2);                                                     //figure out if you should put it there, or in if/else? moisture_value3 = analogRead(moistureSensor3); moisture_value4 = analogRead(moistureSensor4); temp_val = analogRead(tempSensor);  //read temp..   mySerial.write(17);                 // Turn backlight on   mySerial.write(12);                 // Clear   mySerial.print("Sensor 1 is:   ");   mySerial.write(13);                 // Form feed   mySerial.print(moisture_value1);   // Second line   mySerial.write(12);                 // Clear   delay(3000);                           // Required delay   mySerial.print("Sensor 2 is:   ");   mySerial.write(13);                 // Form feed   mySerial.print(moisture_value2);   // Second line   mySerial.write(12);                 // Clear   delay(3000);                           // Required delay   mySerial.print("Sensor 3 is:   ");   mySerial.write(13);                 // Form feed   mySerial.print(moisture_value3);   // Second line   mySerial.write(12);                 // Clear   delay(3000);                           // Required delay   mySerial.print("Sensor 4 is:    ");   mySerial.write(13);                 // Form feed   mySerial.print(moisture_value4);   // Second line   mySerial.write(12);                 // Clear   delay(3000);                           // Required delay float avg_moisture = (moisture_value1 + moisture_value2 + moisture_value3 + moisture_value4)/4; float true_moisture = avg_moisture/ 112.2064;   mySerial.print("Moisture average: ");   mySerial.write(13);                 // Form feed   mySerial.print(true_moisture);   // Second line                                                                mySerial.write(12);                 // Clear   delay(3000);                           // Required delay  temp_val = analogRead(tempSensor); // read the value from the thermistor                                          temp_val /= 6.64; mySerial.print("Current Temp in F:"); mySerial.write(13); mySerial.print(temp_val); mySerial.write(12); mySerial.write(18);                 // turn off backlight mySerial.write(21);                 // turn off display    delay(3000);     }   else {     temp_val = analogRead(tempSensor);  //read temp..                                                                                //not sure if I needed another temp value? but wanted to be safe..     temp_val /= 6.64;        while (temp_val < 75.0){                                                                                                       //initialize tempSensor again?     temp_val = analogRead(tempSensor);  //read temp..                                                                                //not sure if I needed another temp value? but wanted to be safe..     temp_val /= 6.64;         digitalWrite (heater, HIGH);     digitalWrite (redLed, HIGH);          mySerial.write(12);                 // Clear                    mySerial.write(17);                 // Turn backlight on        delay(5);                           // Required delay       mySerial.print("Heating Plant");  // First line       mySerial.write(220);                           //play at tone   for(int f; f<600; f++);{                                                                                                              //delay 10min while heating .. check for pushButton     delay(1000); buttonState = digitalRead(pushButton);        // read the state of the pushbutton value:   // check if the pushbutton is pressed.   // if it is, the buttonState is HIGH:   if (buttonState == HIGH) {                                                                           //tells it to do something when pushed moisture_value1 = analogRead(moistureSensor1);                                                     // read the value from the moisture-sensing probes moisture_value2 = analogRead(moistureSensor2);                                                     //figure out if you should put it there, or in if/else? moisture_value3 = analogRead(moistureSensor3); moisture_value4 = analogRead(moistureSensor4); temp_val = analogRead(tempSensor);  //read temp..   mySerial.write(12);                 // Clear   mySerial.print("Sensor 1 is:   ");   mySerial.write(13);                 // Form feed   mySerial.print(moisture_value1);   // Second line   mySerial.write(12);                 // Clear   delay(3000);                           // Required delay   mySerial.print("Sensor 2 is:   ");   mySerial.write(13);                 // Form feed   mySerial.print(moisture_value2);   // Second line   mySerial.write(12);                 // Clear   delay(3000);                           // Required delay   mySerial.print("Sensor 3 is:   ");   mySerial.write(13);                 // Form feed   mySerial.print(moisture_value3);   // Second line   mySerial.write(12);                 // Clear   delay(3000);                           // Required delay   mySerial.print("Sensor 4 is:    ");   mySerial.write(13);                 // Form feed   mySerial.print(moisture_value4);   // Second line   mySerial.write(12);                 // Clear   delay(3000);                           // Required delay                                                                                                                                         float avg_moisture = (moisture_value1 + moisture_value2 + moisture_value3 + moisture_value4)/4; float true_moisture = avg_moisture/ 112.2064;   mySerial.print("Moisture average: ");   mySerial.write(13);                 // Form feed   mySerial.print(true_moisture);   // Second line                                                                mySerial.write(12);                 // Clear   delay(3000);                           // Required delay  temp_val = analogRead(tempSensor); // read the value from the thermistor                                          temp_val /= 6.64; mySerial.print("Current Temp in F:"); mySerial.write(13); mySerial.print(temp_val); mySerial.write(12); mySerial.write(18);                 // turn off backlight mySerial.write(21);                 // turn off display                                                                                   delay(3000);     digitalWrite (heater, LOW);     digitalWrite (redLed, LOW);            mySerial.write(18);                 // turn off backlight        mySerial.write(21);                 // turn off display                     }          }       }     }    } }   //3 days go by.. Now the plant needs water..     moisture_value1 = analogRead(moistureSensor1);                                                     // read the value from the moisture-sensing probes     moisture_value2 = analogRead(moistureSensor2);                                                     //figure out if you should put it there, or in if/else?     moisture_value3 = analogRead(moistureSensor3);     moisture_value4 = analogRead(moistureSensor4); float avg_moisture = (moisture_value1 + moisture_value2 + moisture_value3 + moisture_value4)/4; float true_moisture = avg_moisture/ 112.2064;   int w = 0;    while (true_moisture < 5.0 && w < 4);{                //stop after watering 4 times..     w++;     digitalWrite(waterPump, HIGH);     digitalWrite(blueLed, HIGH);        mySerial.write(12);                 // Clear                    mySerial.write(17);                 // Turn backlight on        delay(5);                           // Required delay       mySerial.print("Watering Plant");  // First line       mySerial.write(220);                           //play at tone       delay(8000);                          //tested.. waterpump pumps 1 cup of water per 8 seconds       digitalWrite(waterPump, LOW);  //turns off pump       digitalWrite(blueLed, LOW); // LED off           for(int k=0; k<180; k++);{                                                                                                                      //wait 3 minutes         delay(1000);                  buttonState = digitalRead(pushButton);        // read the state of the pushbutton value:   // check if the pushbutton is pressed.   // if it is, the buttonState is HIGH:   if (buttonState == HIGH) {                                                                           //tells it to do something when pushed moisture_value1 = analogRead(moistureSensor1);                                                     // read the value from the moisture-sensing probes moisture_value2 = analogRead(moistureSensor2);                                                     //figure out if you should put it there, or in if/else? moisture_value3 = analogRead(moistureSensor3); moisture_value4 = analogRead(moistureSensor4); temp_val = analogRead(tempSensor);  //read temp..   mySerial.write(12);                 // Clear   mySerial.print("Sensor 1 is:   ");   mySerial.write(13);                 // Form feed   mySerial.print(moisture_value1);   // Second line   mySerial.write(12);                 // Clear   delay(3000);                           // Required delay   mySerial.print("Sensor 2 is:   ");   mySerial.write(13);                 // Form feed   mySerial.print(moisture_value2);   // Second line   mySerial.write(12);                 // Clear   delay(3000);                           // Required delay   mySerial.print("Sensor 3 is:   ");   mySerial.write(13);                 // Form feed   mySerial.print(moisture_value3);   // Second line   mySerial.write(12);                 // Clear   delay(3000);                           // Required delay   mySerial.print("Sensor 4 is:    ");   mySerial.write(13);                 // Form feed   mySerial.print(moisture_value4);   // Second line   mySerial.write(12);                 // Clear   delay(3000);                           // Required delay                                                                                                                                           float avg_moisture = (moisture_value1 + moisture_value2 + moisture_value3 + moisture_value4)/4; float true_moisture = avg_moisture/ 112.2064;   mySerial.print("Moisture average: ");   mySerial.write(13);                 // Form feed   mySerial.print(true_moisture);   // Second line                                                                mySerial.write(12);                 // Clear   delay(3000);                           // Required delay  temp_val = analogRead(tempSensor); // read the value from the thermistor                                          temp_val /= 6.64; mySerial.print("Current Temp in F:"); mySerial.write(13); mySerial.print(temp_val); mySerial.write(12); mySerial.write(18);                 // turn off backlight mySerial.write(21);                 // turn off display                                                                                   delay(3000); }       }           moisture_value1 = analogRead(moistureSensor1);                                                     // read the value from the moisture-sensing probes     moisture_value2 = analogRead(moistureSensor2);                                                     //figure out if you should put it there, or in if/else?     moisture_value3 = analogRead(moistureSensor3);     moisture_value4 = analogRead(moistureSensor4); float avg_moisture = (moisture_value1 + moisture_value2 + moisture_value3 + moisture_value4)/4; float true_moisture = avg_moisture/ 112.2064;          mySerial.write(12);                 // Clear                    mySerial.write(17);                 // Turn backlight on        delay(5);                           // Required delay        mySerial.print("Finished Watering");  // First line        mySerial.write(12);                 // Clear               mySerial.write(220);                           //play at tone              mySerial.write(220);                           //play at tone        mySerial.write(18);                 // turn off backlight        mySerial.write(21);                 // turn off display                                 } }

Question by cburns02135    |  last reply


Embedding Instagram Video Into Instructable

I was creating an instructable yesterday for the newest "Burning Questions" contest, which encourages submission via instagram video and vine. The issue is, these video hosts are not supported by instructables' video embed function.  When attempting to enter the instagram embed code (OSX, both Chrome and Safari), the iframe placeholder will appear temporarily, but will disappear when the instructable is saved or when the user attempts to publish. Only when uploading the video to an approved host was I able to post a video sourced from instagram.

Topic by thatkidwithayoyo    |  last reply


Automatic LED turn on and off circuit, can someone check my circuit to see if it will work? Answered

So I'm working on project where I want LED strips to turn on and off depending on whether or not the IR LED and phototransistor circuit is open or closed This is what I've come up with. Can someone please check and tell me if this will work or not (sorry I can't seem to find a good simulator) It makes sense to me.  The power supply will be one of those 12V LED power supplies.  I will use http://www.ebay.co.uk/itm/LM2596-Power-supply-module-adjustable-DC-DC-Step-down-1-5V-5V-12V-24V-/261512603010 this to step down the voltage to 5V for the IR LED. The LED strip will probably be this one http://www.ebay.co.uk/itm/5M-300-LED-Strip-Light-3528-5050-SMD-RGB-Ribbon-Tape-Roll-Waterproof-IP65-12V-UK-/350871703543 3 sections of 1metre long strips In the images below, I've shown what I want it to do EDIT: I changed the circuit a bit

Question by hanashoib    |  last reply


paintball co2 tank hose to pressure washer trigger gun mod

I like to know how to adapt a paintball gun tank hose to fit a pressure washer trigger, & make what's know as a CO2 spray gun or Cryo gun. Personally, I just wanted to make a Dalek fire extinguisher gun.

Topic by elkaddalek    |  last reply


bits and parts laying around

What to do with spare parts laying around in the shed or attic... use my imagination and made some bugs.... is it art or just hobby, for you to decide....

Topic by oldship    |  last reply


Standards for being featured dropped?

This is anecdotal, since obviously I don't review every single featured Instructable. I just happened to notice two recently that have some nice photos but otherwise seem kind of "incomplete". Absolutely no offense meant to the authors, I'm sure they put a lot of effort into these projects, but the documentation seems lacking and not up to the standards of "someone should be able to reproduce the work": https://www.instructables.com/id/Colorful-LED-Christmas-tree-automaticlly-flashing/ https://www.instructables.com/id/Functional-Nintendo-Controller-Coffee-Table/ The latter especially has nice photos of what is obviously a really nice build, but totally lacks a materials list, wiring diagram, cut instructions for the wood - all information that's essential to actually do the build. There are a couple (nice) comments pointing this out. Just wanted to point this out - not sure if there's someone new on the community team who might be featuring things just because they have nice photos, without checking the text, or if there's been a change in the standards for featuring that I'm unaware of.

Topic by Ben Finio    |  last reply


rar file recovery?

If there is an avi file inside a bunch of rar files, it's split into like 40 some files. and one of those files is corrupt. how can i tell winrar or winace or some software to not delete the file after it extracts it and detects that it's corrupt? this way i figure i can use divfix to repair the avi file. anyone got some ideas on this?

Question by Stewartpaul    |  last reply


Should I stay with engineering?

I am currently in the 2nd semester of my freshman year of college (University of Northern Iowa) as a physics major. This fall I am planning on transferring to Iowa State for computer engineering but I am starting to have second thoughts. I have always liked learning about technology and building projects (currently robots) and I can't imagine any major other than engineering. I got a C in calculus 1 and physics 1 and am currently taking physics 2 and calculus 2. Physics 2 should be fun (finally get to electricity and circuits) but I am worried about calc 2. I've never been a math genius; does this mean I'm in the wrong major? I guess I am looking for some advice on if I'm in the right major.

Question by Arya42    |  last reply


Detect Down, using arduino?

The desired result is a pretty simple one in this case.  I am curious how you can tell where "down" is, using electronics.  I'm sure It could be done by initializing gyroscopes in an initial, level position, but my friend has as small quad copter, that can take off at an angle, and be turned on at an angle, and still level itself perfectly. It doesn't have to have an initial reference to find what down is.  The other option is to use accelerators, but if you are making a device to control a rocket or multirotor it is unlikely to impossible that you will be able to isolate the 9.8 m/s^2 due to gravity from the linear and vertical accelerations,  I assume your everyday gyroscope outputs data in the form of change in degrees, so if it just sitting perfectly still it would just output 0 on all axis, but if it actually gives the current angle I would be surprised, and curious how this is done.  So in conclusion, how could an arduino accurately know where down is?

Question by seedorfj    |  last reply


how can i make sodium hypochlorite bleach from rudimentary material.

Please help me to make sodium hypochlorite bleach from rudimentary material for sterilisation purposes ( i was told by a US trained man that it was so) someone told me to check you out on the net.(that u knew all sorts of wonderful hands-on chemistry) and for mouth wash. it is for a rural health post in northern ghana. we buy the stuff from accra and transporting it across the country to the north is making the cost difficult for the rural folks here to afford. but they need it as cheap as possible for hygiene purposes.

Question by zoserox    |  last reply


tapping into trailer electrical adapter

Because I am an OCD nerd I am already looking forward to next Christmas... and wondering if I can hang a wreath on my spare tire -- and light it using my jeep's trailer electrical hookup. Thanks for any info!!

Topic by Purple Chez    |  last reply


Nonleathalbychoice style weapons/"props"

Hello to anyone who follows me. Yes I am still alive. Now the reason I am posting this is because I feel like I need to give back to the community I have been using/involved with for years now. Not the craft community but the Knex community here. Many of them have moved on from Knex since starting college and so have I. Mostly do to the lack of space and already messy room. So in order to give back I have come up with a better more interesting method. Instead of using Oblivitus's method of making the Knex guns in a CAD program I will instead be giving you the plans and basic instructions to make weapons/props inspired by Nonleathalbychoice.  This being said unlike the Knex guns these items are going to be less accessible, more difficult, and dangerous. To do these things it will help to have a computer with Solidworks 2014 on it. Later I will post PDFs of the cutting plans in order to reach a wider audience. That being said  some of the projects were  and will be inspired by scrap metal I found and will be costly and wasteful to replicate. However I believe that the raw materials for 4 of the projects came in at under $100 total. So still cheaper than many of the larger Knex guns. Also I probably wont be posting these things as step by step instructions since most of these items are made by just cutting out sheet/bar metal. Any advanced instructions will be noted. The time frame for these instructions is going to be very slow due to college. Expect maybe 1  a month if even that.  I will try to inform you of changes and fixes as soon as they become apparent to me.  Also I am first writing this after only an hour of sleep. So if any of you spot grammatical errors please point them out to me.

Topic by tytiger33  


Someone's using my work

I've been a member for a while, but so far have only made comments.  This morning, there was a featured article on building a mason bee house that is obviously using an article that I published in 2006, with no credits for my original work.  I'd like to make some comments, politely of course, to place credit where it belongs (original idea was passed to me by an extension agent), and add some meaningful background and tips.  My original work is currently available as a Word document of about 4 pages, including illustrations.  I also have a PowerPoint show that shows more intermediate steps, although the process is pretty straightforward.  I don't have time to construct the fresh Instructable I've been considering for quite some time, but I could post the documents if there is a good way to do so.  I'm concerned that my response may be lengthy, and I don't want to accuse the author of overt plagiarism, as he did add some nice design ideas to the basic process.  I would really like to know where he saw the info, as it may have traveled through several hands before he saw it.  It would be interesting to try to trace the progress of the initial idea.  So 1) Any good tips?  2) Is there a way to "attach" source documents like the Word and PPT files?  I'm attaching one photo from my original work so you can see the clear similarity.  Thanks,  Randy Person

Topic by RandyPerson    |  last reply