h.a.a.u.v.1

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

Posted by Knex_Gun_Builder 10 years ago  |  last reply 9 years ago


1 key keyboard?

Heres the circuit for 1 key keyboard which has to be done with a attiny85 but can i modify the circuit to be made with a  12F683

Asked by robot1398 7 years ago  |  last reply 7 years ago


Disprove that 1=2.?

Asked by PKTraceur 9 years ago  |  last reply 8 years ago


mission of sputnik 1

Russian technology satellite. One launch, 1957.10.04. Tikhonravov's 1.4 metric ton ISZ satellite was to have been launched by the new R-7 ICBM as the Soviet Union's first satellite, during the International Geophysical Year.    But it was not ready in time, so Korolev hurriedly developed Sputnik 1 as a replacement. It became the first artificial satellite of the earth. Sputnik 1 had 1 watt of power, producing an 0.4 second duration signal on the 7 and 15 m bands. Four antennae were deployed at 35 degree angles. Power was provided by three silver-zinc batteries. Thermo-regulation was by a ventilator. The 580 mm sphere had a mass of 83 kg and was made of highly polished Aluminum AMG6T alloy 2 mm thick. It was built without drawings due to the quick time schedule. Korolev was everywhere, supervising all aspects of its construction. It functioned for 21 days.      AKA: PS-1. Gross mass: 84 kg (185 lb). First date: 1957-10-04. Number: 1 .     the word sputnik is russian word for traveller

Posted by Waren-Neutron 8 years ago  |  last reply 8 years ago


Traxxas 1/16????

Ok so which is better the 1/16 e-revo or the 1/16 slash. It would be used for stunts speed and wheelies definately. So what do you guys think im leaning towards the 1/16 e-revo.And i only want answers from those of you who actually have them not like oh my friend has one and its great only want straight answers not like well this ones good for this and that ones good for that just tell me what car is better.BTW its going to be brushless no matter what. Also there is a rumor going arout that the e-revo includes a battery is that true or what

Posted by silentassasin21 9 years ago  |  last reply 8 years ago


1 gallon cans

At my job we through out at least 200 1 gal. cans a week. I have some in the past to make bird feeders,put screws in etc... when my daughter was in 7th grade I used some to make stage lights for the drama club that included 2 sets of 4 lights each mounted on a 8 ft. black pipe stand .She is 18 now and they still use it. I am now starting to fix up my apartment and want to see if anybody has any ideas of what I could make from them,from lights to furniture. So show me what you got out there.

Posted by creasemaker 8 years ago  |  last reply 8 years ago


Japan Day 1

(I am planning on doing a forum post for each day of my trip in Japan. The first few days will just be copy pasted from my blog (but now with pictures, and image notes!), and after that I will type up the entry I kept for each day in my journal)I am writing this all on my eee pc, and, while I am getting the hang of this tiny keyboard, typing mistakes are common. I am also in various states of mental functioning so excuse any grammatical errors.I woke up at around 6:45 on Thursday morning. I had been feeling a bit under the weather, and was slightly congested. I really hoped that I did not catch something right before my trip. I woke up the other interns (Bilal, Josh, and Paul), because I knew they would be very sad and might cry, if I did not give them the last chance to say goodbye to me. We did a 4 way shoulder-tap, the universe imploded, and I was off.As I walked down Clementina I realized that it would be the last time I smelled that poo stench on the street. I had mixed feelings about this.The BART ride to SFO was very uneventful. Check in was amazingly fast. The line was short and moved quickly. I had almost everything I was taking with me in my carry-on. There was nothing in my checked baggage but knives and lint (one knife & one swiss tech mulikey). Anyway the whole process of checking in took about 15 minutes. The security checkpoint was even faster. There was no line, and for the first time in a long time I didn't set off the metal detector. I had shown up three hours before my flight to be safe, and I was now left with two hours and forty minutes to kill.I went to the currency exchange and turned 300$ into 27,000 yen. The Lonely Planet guidebook I have (which was printed just last year), has the exchange rate of one USD to 120 Yen, at the exchange booth they offered about 98 Yen for a dollar, google says the current rates are 107 yen to a dollar. Stupid weak American money. Anyway, I used ten dollars which I did not convert to yen to buy an english muffin breakfast sandwich and a gatorade. I went to my terminal, and accidentally dropped the barely touched sandwich on the floor while removing my backpack. I was hungry :(I read for two hours then boarded the plane at around 11. There were many people coughing on this eleven hour flight, so I did not have high hopes for avoiding sickness. Read some more on the flight, watched iron man in Japanese, watched iron man in english, and watched be kind rewind. They served two decent meals, and a few snacks in between. Ten hours later when we were finally over Japan, I went to the back of the plane, and stared out the window in the emergency exit door to get my first view of Japan.We landed around 2 pm on Friday. It was hot, so very hot (humid too). I filled out my customs form, got fingerprinted, and photographed, and made my way over to the baggage claim to pick up my knives. I made my way out of the airport to the train, and bought a ticket for what I hoped was a kanayama station bound train. Turns out it was. (cue the "ding" sound that is played on the audio tracks for slideshows, when it is time to change the slide). The first few pictures are of Kanayama station. There was a cool little inflatable pool, with little kids in miniature paddle boats. They also had a bunch of those water mist sprayers that people stand in front of to cool off.I relaxed at the train station for a bit before I caught the number 12 bus. I took it to the Ishikawa Bashi stop, and got off. I used a pay phone to call up Changmi who I had found on couchsurfing.com. I actually set up the couchsurf with her husband (who was out of town) who said it would be ok for me to stay, so I think she was a little surprised when I called. She said that she was currently hosting two couples who each had a small child. It was cool if I stayed, but it would be crowded. She picked me up at the nearest intersection with her mother, one of the couples, and their child in the car.We drove to downtown Nagoya and they let us out. Changmi and her mother were going somewhere, so I hung out with Sarah, Seba, and their daughter Maya. They were couchsurfers from France who had been in Japan for a couple of weeks. We walked around central park in downtown Nagoya for a bit. There is the large TV tower at one end of the park, and a bunch of art pieces scattered about randomly (metal taco boat thing). We went and got dinner, which I later found out to be pig intestines, with an egg, over rice. It was pretty good.After eating we took the subway back to Changmi's house and slept.Japan Day 2

Posted by Tetranitrate 10 years ago  |  last reply 10 years ago


What do 1/4, 1/2, 1 or 5 watts values mean on a resistor? Answered

I know that this is such a basic question but what do those values mean when selecting a resistor? 

Asked by blkhawk 6 years ago  |  last reply 2 years ago


If there is 1 bass in a pond is there more? Answered

I have a pond that is 1 and 1/2 arcrs. And has 5% weeds. Yesterday i caught a 3lb bass on a 4in charcuse banjo minnow. So is there more bass.

Asked by jbend 6 years ago  |  last reply 6 years ago


TomTom 1 3rd Edition

Is it possible to remove the memory card in a TomTom 1 3rd Edition Sat Nav or is it a built in hard drive. I want to put other maps on but can't. Cheers

Posted by aloggy 9 years ago  |  last reply 9 years ago


YESS!! Fred is no longer #1!

NEWS ALERT: It has been official, NigaHiga has passed Fred in subscribers on YouTube! When: 5:35 Eastern 8/20/09!

Posted by Flumpkins 9 years ago  |  last reply 9 years ago


1 inch glass rods

I have 8 glass rods, 1 inch diameter and 4 to 6 feet long.  Believe it or not, they were rods in the master closet of a 60's house we purchased 10 years ago.  I still can't think of anything to do with them, but would love to make some kind of garden installation.  We are VERY skilled.  Any ideas greatly appreciated.

Posted by charlottenc 7 years ago  |  last reply 2 years ago


1 month pro membership?

Hello All! I am interested in finding out how I can purchase one month of service to try out the site? I have been searching for a bed frame design and found a really nice one on here!  The only problem is I can not download the PDF without being a Pro member. Is there any way I can do a "trial" membership and pay a one time month fee and test if I would use it for more than the one project? I really like the bed and would like to try the site for a month to see if i use it for any other plans/projects/ideas. Any help on this is greatly appreciated! Thanks

Posted by Jackson420 2 years ago  |  last reply 2 years ago


Munny is on sale 2 for 1

The Munny is a fantastic toy for those who like to customize stuff. The 7-inch tall vinyl toy can be painted, reshaped, and modded in many other ways. I'm personally a big fan and turned a couple into a pair of speakers a while back. The dolls have now been on sale for five years and to celebrate Kidrobot is selling them two for the price of one for the month of June. They're also having some contest, but more importantly this is a great time to stock up on a couple of Munnys if you've ever been interested in them.

Posted by fungus amungus 8 years ago  |  last reply 8 years ago


Failed ACR V.1

Here is just some pics of an ACR that I had made sometime back. Enjoy! -The Red Book of  Westmarch

Posted by The Red Book of Westmarch 5 years ago  |  last reply 5 years ago


Global Warming Experiment #1

(I slightly changed the instructable into a forum topic and an instructable)The Instructable Half"Global Warming" Experiment #1:As you can tell by my quotes around "Global Warming", I personally don't believe that this theory is happening. Theres facts I can use to prove this. However, even I believe that no matter how you put it, there's going to be some bias. Also facts are boring :PSo, what I have planned, is to do a series of experiments on what global warming might cause if it were real.I'm doing this because I've heard people claim some extraordinary things, which based on data won't happen.I could post an instructable with a bunch of facts, and I might. But for now, I want to set up a couple collaborative experiments. One reason I want collaboration is I'm biased. The other, is so you can't complain about my methods.I haven't done the experiment yet, I really don't know if this will help, or hurt, my case.The experiment is to determine if "global warming" could melt glaciers, thus cooling the ocean. Notice here I'm assuming global warming is happening. It isn't. But when people make claims on the news and stuff, they are assuming that too.Please comment if you would like to change my methodology, OR you want to do the experiment.I'm going to describe how the Instructable (and hopefully the rest in the series) will work.1) I, or anyone, proposes a framework for an experiments and writes up an Instructable. (Will be referred to as "I" in the following steps)2) I monitor the suggestions, editing and fixing as needed. After about a week or so, I go onto step 3.3) I preform the experiment to the best of my ability, and write up an additional 2 steps.3a) The first outlines my changes. This could mean I didn't have a 4x8 loaf pan, and I had to use a 3x8. Or it was plastic. Whatever. These small details are important3b) The second outlines the data and conclusion. This may have images of the experiment, graphs, tables, sensor data, Whatever. I also make a note of my previous bias.4) Wait for more people to run through the experiment, adding them as collaborators.5) Write up a conclusion to everything, OR do some more investigating.Its not that bad, however the whole process might take a few weeks. (I don't know)Scientific MethodThere are seven steps to the Scientific Method, which we will follow:1. Define the question2. Gather information and resources3. Form hypothesis4. Perform experiment and collect data5. Analyze data6. Interpret data and draw conclusions that serve as a starting point for new hypotheses7. Publish results(Thanks Wikipedia!)#1 was done in the introduction.#2 I've already done, however you only have to look into data you'll need during the procedure.#3 I've done it, but I'm not telling you (I don't want a bias, even though I've hinted towards my guess)#4 - We're going to expand this out. More later!#5 and #6 sort of come together in this format, will be done as we go along.#7 is done as we go!Okay, #4. Remember back to High School, remember Lab Reports? Well basically there will be a step for each segments (leaving some out). We sort of do this already in most instructables "What will happen", "What you need", "How you do it"; this time more formally. Due to Lab Reports being unstandardized, I'm breaking it down into:IntroductionMaterialsProcedureDataIts shorter than your average one, due to the fact in Data, you have hypothesis and stuff I don't want to reveal yet ;-)The following is the framework, you can also see my instructable:(This is a framework, remember. Its not supposed to be "done" and perfect)Materials*Large basin of some sorts.*Water*Ice*Lamp + Light bulbs (100W & 40W)*ThermometerProcedure1) Fill large basin/pan with water.2) Take and record standing temperature of water.3) Add ice off to one side of the pan.4) Take temp. of water every five minutes until it starts to level out, at least 4 readings.5) Replace water, and repeat steps 2&36) Shine lamp w/ 40W bulb off to the non-ice side of the pan, but allowing some light & warmth to reach the ice. (Roughly 20-35%)7) Repeat steps 4&58) Repeat step 6 with a 100W bulbTake pictures throughout!What now?Okay, I'll be updating this with your comments over the next week or so. If somethings wrong with it, POINT IT OUT!!! I'm going to add my thoughts in as well. (I still feel its missing some things, I can't put my fingers on them, though!)

Posted by zachninme 11 years ago  |  last reply 3 years ago


The Kinetic Rifle V.1

Here it is: the bullpup, tube mag, bolt-action, pump-action, sling semi-repeater.  This is by far my most favorite gun I have ever built.   The reason I call it a "semi-repeater" is because while it has a magazine, loading it involves a two-step process of pulling back the rubber band and then pulling the pump.  Therefore you don't have to load each individual bullet into the barrel by hand, the pump does that for you, but the band still has to be pulled back manually.  The gun was originally intended to have the pump bull back the band as well, but to do so the pullback distance would have to be greater, requiring a larger barrel to house a longer pullback, requiring pieces I just don't have.  When I get the pieces I am going to make the pump pull the band back, and I will post that as the V.2. What I love about this gun is that it takes many concepts and combines them to work in sync with one another.  I also like the fact that there is almost no limit to how powerful you can make this gun, since the ratchet can hold an incredible amount of tension.  Overall it is an incredible gun, averaging ~60ft with the 1 band used in the video.  Though it isn't the most reasonable choice for a war (it only holds 4 shots in the mag and is huge), it is well on its way to becoming the most efficient knex repeater out there. -Kinetic iMovie wrecks.

Posted by Kinetic 8 years ago  |  last reply 7 years ago


Instructables Internship - Day 1

Hey Everyone!I just arrived in Oakland from New York last Saturday, at 10:30 AM. Canida and Tetranitrate arrived shortly thereafter to pick me up from the airport. Over the weekend, we went camping. Not something that you would expect out of an Internship, but here at Instructables, anything can happen. The trip was awesome, camping up in the very scenic Sierras was simply astonishing. I'll include some pictures of the trip at the end of this post.Today was my first day at Instructables HQ. After about 20 mintues in the Control Tower, I realized how awesome the rest of my stay would be. The environment here at Instructables is unbelievable. Everyone, and I do mean everyone is super-friendly. Instructables is seemingly just a large family, of which every member seamlessly gets along with every other member. This doesn't only apply to the website, but also to the staff here at HQ. Instructables is unlike any other Internship/program that I've been to/participated in. At first glance (after the tour, of course), Instructables has actually surpassed my expectations. I was expecting to see a lot of which I had already seen in the photos of HQ on Flickr and Instructables, but there is just so much more. There's so much to see, do, and get totally sidetracked on just while walking around. I'm just amazed that I'm here, and that I got the opportunity to work for such an awesome company.So, on to the details. I'm set up on a table in front of a huge window that looks out at the front entrance. I get "free lunch", because I joined "The Salad Club". That entails me making at least one lunch for everyone sometime during my two-week internship, and every other day I get to eat food that someone else is making for all of us, etc. etc... I get time, everyday, to do what I want to do, where "what I want to do" is defined by building something. Again, this is something that you would never expect from an internship. So, basically I work half the day, finding people that would potentially like to join the site, getting their e-mails, and telling Tetranitrate about them, and then the other half of the day I'm building. This is pretty much the sweetest deal that I could ever think of. 1/2 of the day, I get to look at cool DIY projects that people post on the internet, and the other half I get to build. I think that everyone should know how awesome Instructables really is. They really love their work, their company, and what they are giving to the How-To Community as a whole.Anyway,I'm so glad to be here, and I really can't believe that I am here, yet.-Muffinator

Posted by T3h_Muffinator 11 years ago  |  last reply 9 years ago


Whats the difference between a 1/2w resistor and a 1/4w resistor? Answered

I am in need of a 33ohm 1/4W resistor. The closest I can find is a 33ohm 1/2w resistor. the source voltage is 6v, the leds(2) 2.6V each with a 28 MA current. Is that ok?

Asked by hunter1125 8 years ago  |  last reply 7 years ago


How do I make a 1" x 1" 1/8" thick copper door go up and down?

I am making a sculpture that has a 2" o.d. copper tube running down the middle. At the bottom of the tube I need to have a small door about 1" x 1" that will raise and lower on the outside of the tube to let balls enter and fill the tube. Does anyone know how I can do this? What type of motor, etc to use. Thanks, Marc

Asked by cramnager 9 years ago  |  last reply 9 years ago


Ghostbusters Ecto-1 Recreated and Lovely

In honor of the upcoming Ghostbusters video game, the Ecto-1 has been recreated as a promotional vehicle for it. All of the details have been taken care of and carefully photographed by fans. Link

Posted by fungus amungus 10 years ago  |  last reply 9 years ago


How many mAh = 1 farad?

Asked by 7654321 7 years ago  |  last reply 11 months ago


Is a 1 ohm resistor really needed? Answered

I will be making an LED display. After calculating using the online calculator, I am told that I will need 1 ohm resistors for my series of LEDs. I am thinking that 1 ohm is really not a lot and if I can skip it. Thanks!!

Asked by stella_7277 8 years ago  |  last reply 8 years ago


How to make 1:1 transformer? Answered

Hello , i want to make a 1:1 transformer for audio (guitar pedal to power amp input).Can i use this size of transformer ? and i want to re-wire it with the type of wire in the image , how many rounds the transformer need? Thanks in advance ! sorry for my bad English!

Asked by login721 6 years ago  |  last reply 3 years ago


Is Lm386L is the same LM386 or LM386N-1? Answered

Are these the same, from the datasheet it looks identical to the LM386N-1 and I read the L is just a certain manufacturers way of saying it is lead free. So does anybody know if they are the same and if so which it is comparable to? I.e just the 386 or the N-1, N-2...etc. Can I use this directly in the same circuits as LM386N-1s.. I can't see why not from looking at the datasheets. datasheet for the 'L' chip http://www.datasheetdir.com/LM386L-D08-T+download LM386N-1 datasheet: http://pdf1.alldatasheet.com/datasheet-pdf/view/8890/NSC/LM386N-1.html

Asked by mdog93 6 years ago  |  last reply 2 years ago


555 1 Hz pulse generator? Answered

Hi,I have a simple buzzer which I want to convert to an oscillating buzzer so as to obtain the sound similar to that of an automobile's reverse indicator.I've posted a schematic(borrowed from electroschematics.com) below.I intent to replace the LED with my buzzer and omit the resistor.I hope by building this circuit,to make my buzzer 'buzz'(or make noise) at an interval of 1 second(since its a 1 Hz pulse generator).Would the results be similar to my needs?

Asked by Adarsh_tronix 5 years ago  |  last reply 5 years ago


how meany mah is in 1 uf?

I need to know how meany mah is in 1050 uf and i need to know

Asked by ALEXANDERS_CH97 2 years ago  |  last reply 2 years ago


Happy 1 year of Instructables (almost)

So... in two days, it will be my 365th (A.K.A one year) anniversary of becoming a member of Instructables. It doesn't really seem like a big deal, but there are only 2 websites I'm constantly on! I might make an instructable that day.... Happy 1 year!

Posted by Flumpkins 9 years ago  |  last reply 9 years ago


Help, with Ubuntu on Acer aspire 1 Answered

Please help, we have everything else going. Ubuntu on a netbook, that has wireless. Were can I get the driver and program to recognize the wireless card that is built in?

Asked by emit 7 years ago  |  last reply 6 years ago


1/2" PVC inner diameter?

I was looking at all the excellent instructables about marshmallow guns, but I have a concern. I'm Canadian, and it seems to me that the inner diameters of 1/2" PVC pipe in the US is larger than 1/2" PVC in Canada. So, could someone in the know please straighten this out? Is there a difference or not? If so, what would be the appropriate substitute size? Thanks to all.

Posted by Spongeloaf 11 years ago  |  last reply 11 years ago


1/8 w resistor for 12v?

Hi, I've been trying to add a LED light for my glove box, since it didn't come with any. I bought one radio shack led with built-in 1/8w 680ohm resistors to see how it was made. I read the 1/8w resistor wouldn't work and it would burn up? Using something like 1/2w would be better. I tested it with a 9v battery and I didn't feel it getting hotter. Maybe just warm? I got some LEDs off ebay many years ago and I have no idea what their specs are. They are 3mm led bulbs. I decided to make my own by using 5 1/8w 150ohms resistors. 150 ohms are the only resistors I have on hand. With the combined resistance of 750 ohms, how much voltage is going to the LED? Will I be fine with just using 4 150 ohms resistors? Will is be dangerous to use the 1/8w resistors? I don't want a fire. Will having more resistors also help spread out the heat among the resistors? I drive 4 hours a day, so the light will only be on for that duration. Thanks

Asked by RoboRay 6 years ago  |  last reply 6 years ago


K'nex Builders' Challenge! WEEK 1

Hey! R&C here. I just made up a fun way for the average knex builder to take on challenges. Every week, on Wednesday, I will give three or less specifications for a knex model. Your(the builder's) job is to construct a knex model the meets up to the specifications. Then, post a single picture of the model on the forum. If you have any questions, PM me. Well, here is Week 1's build. CATEGORY- GUN SPEC. 1- HAS MAGAZINE SPEC. 2- 2 HANDLES SPEC. 3- *NONE* Please read week 2 Well, there you have it. Go for it, Builders! Ratchet and Clank

Posted by Ratchet and Clank 10 years ago  |  last reply 10 years ago


Got a 1/2 HP motor

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

Posted by guyfrom7up 10 years ago  |  last reply 10 years ago


1 night stand w/ knex

Posted by Knex Lego Maniac 8 years ago  |  last reply 8 years ago


rgb led and 1 analog input? Answered

Im trying to make an rgb led light up in different colors to based on the analog input, for instance a "potentiometer" or equivelent like the lm324 controlling the input causes the input to go higher the red turns on then green and then blue progressively, i have some code worked up but am willing to work from scratch again, im working with the lm324 op-amp and an arduino w/328

Asked by redd.the.cat 6 years ago  |  last reply 6 years ago


Fabricating a 1"-2" transparent dome?

I need to create a small, transparent dome (out of some sort of plastic or resin) that will be able to be glued to a flat surface. What materials are out there to make something like this (that I will be able to do as smoothly and evenly as possible)? It will need to be able to magnify an image underneath it. Sorry if I don't have enough details on what I am trying to do, I have never made something like this before so any help will be very much appreciated. Thank you for your time.

Asked by mappum 8 years ago  |  last reply 8 years ago


What is a 1/4 watt resistor? Answered

Alright, So I know the basics about resistors and what-not, but as I was buying beginner supplies, I noticed there were resistors in OHMs and Watts, What's the difference between the two? And like, can the unit Watt be transfered into OHMs? And which one would I use when my general area of working would be around basic LED work and noob stuff like that xD?

Asked by E D E N 9 years ago  |  last reply 5 years ago


1)Meaning of 'Star' tag on the project? Answered

1) What is meaning of 'Star ' symbol on project, who gives this, what is the criteria, Is there Reward ? 2) What do you mean by 'Editors pick', 'Popular', 'Rating', 'Views', Zeitgeist',      Who selects it, what is the criteria 3) If some one copies idea and take patent on that idea, Does the Author gets something?      What is the cross check if some one manufactures and sell as a product in the market? 4) I am a Retired person, Is there any way to get Pro Membership freely ? 5) Is there any booklet or Guidelines of Instructables, and is there any flow chart how the system works once the Project is published by the Author

Asked by nachiketa 6 years ago  |  last reply 5 years ago


Jollex's Innovationist's Tournament [Round 1]

ROUND 1 WILL LAST FROM MONDAY, JULY 26TH TO SUNDAY, AUGUST 8TH This first round is going to be different from normal contests because it will be done in teams of two. There are 24 participants, therefore there will be 12 teams, picked by me. If you do not like your team, you may mail me and I will be willing to change them. The top 6 teams will move on to round two. The criteria for this first round is gun mechanisms. You should try to make the most complex mechanism you can with the most moving parts possible. Range will not be a factor when your entry is being judged, however it will boost your entry. Teams: -Jollex -TheDunkis http://www.youtube.com/watch?v=n0CtpzMbJTg -Millawi Legend -logic boy -cyborgold1 -lukas rider -Sketch98 -knexfan9182 -~Aeronous~ -Seleziona -sprout_less -rec0n -megametal8 -Killer safe cracker -Zak -Bakenbitz http://www.youtube.com/watch?v=ZZeL3VT8hqg -shadowninja31 -razzlekunai -DAI GURREN DAN -Loose -Ally http://knexinnovation.net/showthread.php?932-Patacult&p;=13320#post13320 -DJ Radio -Oblivitus http://knexinnovation.net/showthread.php?930-My-entry-for-Jollex-s-innovationist-tournament.

Posted by jollex 8 years ago  |  last reply 7 years ago


1 Arduino + 3 or 4 LM35s?

I am a total beginner, having logged about one hour here (the last hour). Does this sound OK for a first Arduino project? I want to sample and log the temperature outside at the surface and at depth for a total of 4 readings to a depth of around 50cm (20"). The reason is to consider if I should provide my daughter's pet rabbits with an underground burrow as relief against the next heat wave. It seems a nicer option than running a swamp cooler all day. Though I suppose I could use an Arduino + LM35 to turn on and off the swamp cooler :) It looks like I can do it with 4 x LM35s, an Arduino One, some sort of data storage, a 9v battery and a bread board. Any recommendations for if I should use WiFi or an SD card for storage? My guess is the SD card is simpler to programme and maybe less of a battery drain. It seems I just need to hook up the data out of the LM35s to the analogue ports, then loop over the inputs and write the outputs to a file somewhere. And calibration too. Any pointers on how to turn the LM35s into probes that can be buried in the ground? I was thinking I could bind all the probes onto a dowel, dig a hole and bury it. How to extend the LM35 pin outs? Thanks in advance for any suggestions.

Asked by FargingIcehole 1 year ago  |  last reply 1 year ago


Can I use a 555 timer to cycle on 1 minute and off 1 minute? Answered

I am kinda familiar with the 555 timer for flashing lights and such, but I am in need of a circuit which will cycle on for 1 min and off for 1 min. Can this device (555 timer) be used for such low frequencies. It will ultimately control a 12v relay to run a bilge pump in an Instructables evaporative cooler which I am making (this mod is my idea which I will share with the original inventor if it works). I guess that if the low frequency is possible I will also need a power transistor to step up to the voltage/current needed to operate the relay. Any help greatly appreciated........ Thanks, Peter :-)

Asked by ppowell14 5 years ago  |  last reply 4 years ago


What's cheaper to build- 1 story, 1 1/2 story or 2 story house? Assume all are about 2000 Sq Ft?

Looking into having a home built. Want to know which is easier to build thus cheaper to build.

Asked by 9 years ago  |  last reply 2 years ago


2 Voltage Regulators, 1 Power Source?

Is it possible to use two voltage regulators of different values with one power source?

Posted by flagrantfouler 9 years ago


How to power 8ohm 1 watt speakers?

I'm working on a project for school that consists of a wireless speaker. They will be mono speakers.  I have an 8 ohm 1 watt round speaker. I would like to power these.  I've read on lm386 and tsa7052 ic to do this. For the wireless I was going to use dexdex's instructible bluetooth headset hack I'd like to power it all with a 9volt or a lithium hacked out of old product. Are there any things i should know for the amplifier in relation to the type of speaker i will be using?  Will i be able to power the bluetooth headset and the amplifier from the 9v? thanks for your time!

Asked by williamhaze 6 years ago  |  last reply 6 years ago


What graphics settings for Crysis 1? (PC)

Yeah, more computer stuff :D my specs are: GFX: AMD radeon mobility hd 5470 CPU: AMD 1.8 triple core 3 threads. RAM: 8gb windows 7 home premium 64-bit thanks in advance, if you do not know, tell me what you run it on and what settings. thanks! -the puppet

Asked by Fred the evil puppet 6 years ago  |  last reply 6 years ago


12v joule theif from 1 AA Answered

I need to make a joule theif that can output 12v to power some rgb leds. any help would be great. but preferably in the form of a schematic. i have all of the parts needed.?

Asked by aduy 7 years ago  |  last reply 6 years ago


Instructables Booth at Maker Faire Day 1

Check out some pictures from the first day of Maker Faire. One day down, and we're already exhausted! We've been tattooing consumer electronics, trying to pop balloons with plasma arcs, and introducing people to the site. If you're in town, come say hello.

Posted by ewilhelm 10 years ago  |  last reply 10 years ago


Why cant we buy 1 month subscriptions?

Hi, why cant we buy 1 month subscriptions

Asked by dylan-duffy 7 years ago  |  last reply 7 years ago


how to make a 555 flash a led on for 1 second? Answered

And flash off for 1 second too, like a car turn signal? (i am trying to make a turn signal for a rc car project)

Asked by zack247 8 years ago  |  last reply 8 years ago


Why or why not does .9 repeating equal 1?

I already posted this as a regular question, but someone told me to make it as a burning question, so here it is: HI! I am wondering if .999...=1? I mean if 1/3=.333 and 1/3+1/3+1/3=3/3 and 3/3=1. So wouldn't .333...+.333...+.333...=1? But it actually equals .999... not 1. I googled this question and I got many different answers ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ For example...(someone wrote): I'm not really into math, but a friend brought something up to me today that really seemed very strange. (For the duration of this post, .999 will mean .9 repeating unless otherwise specified- just for the sake of ease) .999=x 10x=9.999 10x - x = 9x 9x=9 1x=1. .999 = 1. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Someone else wrote: Numbers are fake. They are a manifestation of our minds to describe something, similar to words. Just because we say "red" doesn't mean something is red. what is red? Languages and math are very similar. Math is universal...at least for our planet though. .999~ does not = 1. But what .999~ repeating represents, does in fact equal what 1 represents. No-one will ever be able to comprehend infinity, os its time to stop trying. Think of space and the universe. IT IS GROWING. how can it continue to grow with no stop? what is there to contain it? WE need something to contain it in order for us to understand it. We need a stopping point, but there is none. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Another person wrote: In your proof that .333...*3=.999... you forgot to include the fact that .3333... is NOT 1/3. 1/3 if not a number that can be turned into a decimal in any way. I thought someone might like to know this fact. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ And the last person wrote: Just a pedantic point the equation for differentiation is given by lim x->0 [f(x+h)-f(x)]/h, it has the minus sign. It is after all just telling you the slope and is no different really from doing simple trig using the tan function. Here you just take a really small triangle. As to the 0.99~ thing, this is really just writing the supremum (spelling might be off) of the numbers less than 1. Just think of it as taking the smallest number 'n-word' than 0 away from 1. They are not identical for if they were we would not have a continuous number line, but rather a dashed one with lots of wholes in it. I could simply argue that 0.99~8 is just as close to 0.99~9 as 0.99~ is to 1. For those who really want to understand go and look up supremum numbers and the axioms of the real number line. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ So who is correct? Do you agree that .999...=1? Or .999... does not equal 1?

Posted by Pizzapie500 8 years ago  |  last reply 5 years ago