Large Targets

Post links to large K'NEX gun targets here! Please post the link with an optional comment!

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

LARGE metronome

I need to make a LARGE metronome. I am teaching a beginner band, and the small metronome I have now cannot be seen or heard when everyone is playing.. Something like this would be great:  but I need it to be HUGE, like 5 feet across.. Similar to a beta brite LED sign array.. ALSO: I want to be able to control the BPM, not just a dial that increases speed and slows it down, I need to be able to put in "80bpm" or "90bpm" etc.. Could I use the above

Posted by 3DPiper 5 years ago  |  last reply 5 years ago

large range!!

I just made a gun with a 10 bullet magazine that shoot's 72.1784778 feet!!!!!!!!!!!!! with four rubberbands!!!!!! I think it can hold more but I haven't tried yet. What I wanted to know is how to make a good measurement system for proving range, I would appreciate if someone could tell me. (Also I told people my oodammo sniper shot 90 feet, this was a mistake, I thought a meter was 4.5 feet). I will soon post a video proving the (unangled) range. Edit: I will not post the video since there is so little interest

Posted by Mr. Muggle 9 years ago  |  last reply 8 years ago

Large DC motor

I'm looking for a relatively cheap motor that would be large enough to spin around a nerf Vulcan. I don't know much about what kinds of motors would be good, or where I could get them. From what I've found, they're not that common and they're super expensive. Does anyone know where I could get one for under 100 dollars? It doesn't need to be fast. Thank you in advance for your help.

Posted by alecnotalex 5 years ago  |  last reply 5 years ago

Large format cameras

I am thinking about getting into large format photography & I was hoping that I could get some questions answered by other photgraphers on here.  1: How many of us out here use large format cameras? 2: What is the type of technique that causes the pictures to appear w/ a yellow or brown appearance to it that is used in vintage photo sessions? 3: Can I get some tips on developing w/ an enlarger it has been about 10 years since I've used one so I don't remember anything about that. Any help w/ this would be greatly appreciated, thank you ahead of time.

Posted by sofiadragon1979 6 years ago  |  last reply 6 years ago

Large LED diffusers

I'm working on a project where I need large rectangular LED diffusers, about 2" x 0.5". I don't have much depth (about 0.5") to work with. Is there something I can buy, or something I can make that will act as a large enough diffuser? Thanks

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

Large cheap breadboards?

I need some large breadboards for free or very cheap. Is there a company that gives free samples, or someone here who has some they don't want? I also need a way to cut them.

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

Polishing large stones

I am looking for some advice on polishing large stones. I am from New Jersey, and there is a plentiful supply of bog iron. I can't dig a hole in the ground in my yard deeper than 8 inches without coming across some of it. Some stones are small but most wiegh about 20 to 30 lbs. I have several that are at least 150 lbs. I have tried to use them in as many ways as I can think of to decorate my yard. But bog iron is not always an attractive stone. I have seen some small polished samples on the internet and I like the way they turned out. I would like to try and polish some of my larger stones. I could do it by hand but it might take months or even years. I'm not sure what a sandblaster would do to it, but I don't own one and am not looking to buy one. Does anyone have any ideas or suggestions for a faster way to polish a large stone. Thanks in advance.

Posted by feign 12 years ago  |  last reply 12 years ago

Large-caliber Sundial

I was wandering the web, looking for information for a future Instructable, when I got ever-so-slightly side-tracked.I came across this blog entry about a bunch of people who made their own, rather unique, sundial:Our friends in the village are building a garden from scratch, to go with their new house. A key part of garden planning is to get the major design "features" sorted out ahead of the planting. One of the things that the boys wanted was a sundial, so work has started there. The plan follows the traditional method of sundial construction, as you will see from the pictures:1. Buy a World War II anti-aircraft gun (preferable the portable kind)2. Put it in the garden.3. Make sure the safety catch is on.4. Invite some like-minded nutters round for a barbecue and get them working the elevation controls.5. Set the barrel to exactly 52 and a bit degrees elevation (to match the latitude of the garden).6. Do some nifty work with a calculator and a compass to figure out where the hour markers go for precise "Northmoor Time".7. Unilaterally declare independence - and if anyone argues....:lol:Link to Blog

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

collar expander?

Has anyone made a good collar expander?  My husband gains and loses a 1/2 inch in the neck area "from time to time" and I can't always locate his purchased expander.  Cordially, nehmah

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

Looking for a large 3d printer 16"-24"

Looking for a large 3d printer 16" to 24" for ABS and NYLON , Anyone know of a company that makes one.

Posted by DIDDE55 5 years ago  |  last reply 4 years ago

Knex Community. How large is it right now?

I used to be very active on this site MANY years ago. However, school took priority and I let knex sit for a while. Now i'm kinda interested in the physics of it. However, it seems as though the community has died a bit. If ANYONE is still involved in the knex gun making community, PLEASE comment here! I'd like to gauge how large it is. THANKS!

Asked by knexsniper1 5 years ago  |  last reply 5 years ago

3D Scanning a Locomotive

I know nothing about 3D scanning so hope to find suggestions here. I have a large object I wish to scan and import into Rhino 3D and eventually cut (1:120 scale) on my tabletop CNC mill. The diesel locomotive upper nose has compound curves in its shape. The red rectangles in the illustration mark the area of the locomotive that is difficult to reproduce accurately in a drawing. It is this area I would like to scan. Is there a scanning system somewhere in instructables that is capable of scanning this large area of the diesel locomotive? If so, please point me to it. Thanks much.

Posted by CyValley 3 years ago  |  last reply 3 years ago

Larger Photos in PDFs

I am a long-time free Instructables member and a brand new Pro member. Now that you have subscription memberships, would it be possible to offer in the PDF downloads a third image size choice (currently standard and small) of LARGE for those of us who would benefit from larger photos? That would be a fantasticly awesome feature that could be a Pro-only benefit. What do you think?

Posted by susyn 9 years ago

What K'nex gun should I make? Answered

What medium sized, powerful K'nex gun should I make?I do not have a ton of pieces, so I cannot build huge guns like IAC's cannon.

Asked by ~KnexBuild~ 7 years ago  |  last reply 7 years ago

Instructions for making really big "God's Eyes" or "Ojo de Dios" using 4 or more dowel sticks?

A few years ago I found instructions for making a really big "Ojo de Dios" or "God's Eye", using 4 or more long dowel sticks... anyone know where that instructable is now???  I remember the man that was demonstrating ended up tying several "eyes" together; they were stunning. Now I cannot find the instructions and I am mucho frustrated!

Asked by 7 years ago  |  last reply 7 years ago

Induction Heating large scale

I am working on a project and have a large tank full of product kind of a greasy substance trying to heat up to temp of 180 degrees. the tank currently has a 4 inch pipe running inside wall all around tank for heat transference.. At this location a boiler is not a option at this time . I was curious if anyone ha s ever attempted a large induction heater build one that would encase a 4 inch pipe and heat liquid inside so thermal transfer would heat our product. Sorry for not including all details at this time i just curious if large induction heat was possible or efficient ?Thanks,

Asked by andy1917 7 weeks ago

Large motors and electronics classes

Hello,Is it just me, or there's something wrong with "Large motors" and "Electronics class" by randofo? It looks like there's nothing in comparison to just yesterdady, whereas I bought a premium account just to download his classes. Another problem is that I can not enroll or download any classes.Can You help me?

Posted by Emerid 4 months ago  |  last reply 4 months ago

Making a large shipping scale?

I'm wanting to build a large shipping scale with capabilities of measuring up to 2400 lb's.  I'm curious if anyone has done anything like this and could give me advice.  I was thinking of combining 6-400 lb. scales with an arduino and simply displaying the sum of their weights on an LCD screen.  Do you think this would work?

Asked by Spaceman Spiff 5 years ago  |  last reply 5 years ago

Large automated nut roaster?

I am not particularly gifted at the finer points of building things and would love your thoughts: Have you made, seen, or have ideas for a very simple automated, rotating DIY roaster that could be used to roast a large amount of nuts? Or on a simpler scale, Ideas for adding a motor to one of those whirley pop popcorn stovetop jobbies to get the handle turning automatically? Thanks all!

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

Large size exercise ball

I have a large exercise ball that has a 2" gash in it compliments of the cat. i'm a nice shade of green and re-purpose/reuse  everything i can.  I have thought of a planter,a tiny 'pool' in the garden for critters and a beach bag. I would love to get a few mre ideas to what i can do with it.....anything but throw it away. it never really goes away anyway. Bring on the suggestions! :)

Asked by diymentality 8 years ago  |  last reply 6 years ago

Navigating large-response topics

As a participant in AngryRedHead's Photo challenge, I've noticed that, as the thread gets longer, navigating it to find my past comments and replies is getting... odd. Using the next and previous buttons seems mixed up.  Sometimes you don't get a new set of comments, sometimes you get a few extra comments in between the ones you already saw, sometimes nothing happens. Similar things happen on other topics with large numbers of responses. (Running XP and up-to-date FireFox)

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

Large Pictures not showing up?

Pictures used to display intermixed with the text of an instructable. Now all I see are the little 'icon' type pix for each step that are at the top of the instructable. The little pix are not enough to see the detail of what is being done in the instructable. How can I get the old display style back?

Posted by servant74 10 years ago  |  last reply 10 years ago

Large Speaker Driver needed.?

I have a large 8ohm speaker with a "12W500" rating, and another sticker saying 3/38/5 (QC check?)  ~18cm Magnet and 30cm Cone. I want a signal generator for  chladni plate (vibrating plate) I know how to make a signal generator from a 555, but i dont know how to drive the speaker magnet. Do I put the output to a "power transistor"? I have only used them for signal amplification before not power supply.. Will it run on 12V, 3V 24V? What kind of amps may it draw 200mA 500mA? 1A? 4A? I don't even know ballpark figures! Any tips, Circuits or transistor reccomendations will be VERY appreciated... I am fairly proficient at electronics, but this eludes me completely as it is taken for granted in most instances, or they use a 300€ amplifier.... I already build a signal generator. Cheers

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

1,574 (large) Gin and tonics

This has been troubling me a bit: After watching Comic Strip Presents - Complete Collection [DVD] (I got it from HMV) I wondered about a segment from Mr Jolly Lives Next Door - In the film, the pair Mayall & Edmonson order 1,574 (large) Gin and tonics in a "traditional old-English illegal-drinking establishment" called The Neon Tee Pee. (Script can't be found, or un-blocked video clips any more) The thought occurred to me "How much did one large G&T; cost then?" We know that they had no money at all before receiving a brown envelope stuffed with bank notes. The brown envelope should have contained £3000 and I'll assume that it did. In being exact about the quantity of G&Ts;, I conclude that they knew exactly how much money they had, and how much the drink cost. If follows that all the £3000 was counted, why leave any in the van if you're going for that much alcohol? Later the £3000 is acknowledged, but 2 pound notes remain. At a maximum of £2998, 1574 G&Ts; work out at £1.90 each which sounds reasonable for 1983. But that leaves £7.40, and the £2 of course. What did they do with the £7.40, what was the £2 for, why did they not ask for 1578? Cigarettes? And if so, how many? Or is there some special significance to 1574? L

Posted by lemonie 7 years ago  |  last reply 7 years ago

Large Gears template anyone?

I need to make gears that are approx. 4 feet in diameter for a float in a parade.  The gears will line the perimeter of the truck and are going to be made out of 3/4" plywood with metal bracing on the teeth to prevent the plywood from chipping and attached to a plywood background.  It would be awesome if we could alternate 4 foot gears with 3 1/2 or 3 foot gears for visual interest.  It needs to look childlike - so we are not using sawteeth.  I'm going to try to attach a picture with our logo for ideas.  Any help with designing a template or where I could go to get measurements would be appreciated!  Thank you!

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

The Large Hadron Collider: is it worth it?

The Large Hadron Collider(LHC) is to be unveiled this year. It is designed to solve the much talked about energy crisis, and hopes to do so, but can it be worth all of it? From Wikipedia- (On October 25, 2005, a technician, José Pereira Lages, was killed in the LHC tunnel when a crane load was accidentally dropped. The construction of LHC was approved in 1995 with a budget of 2.6 billion Swiss francs, with another 210 millionfrancs (€140 M) towards the cost of the experiments. However, cost over-runs, estimated in a major review in 2001 at around 480 million francs (€300 M) for the accelerator, and 50 million francs (€30 M) for the experiments, along with a reduction in CERN's budget, pushed the completion date from 2005 to April 2007.[14] 180 million francs (€120 M) of the cost increase have been due to the superconducting magnets. There were also engineering difficulties encountered while building the underground cavern for the Compact Muon Solenoid. In part this was due to faulty parts lent to CERN by fellow laboratories Argonne National Laboratory or Fermilab (home to the Tevatron, the world's largest particle accelerator until CERN finishes the Large Hadron Collider). [15] The total cost of the project is anticipated to be between US$5 and US$10 billion.[2] On March 27, 2007, there was an incident during a pressure test involving one of the LHC's inner triplet magnet assemblies provided by Fermilab and KEK. No people were injured, but a cryogenic magnet support broke. Fermilab director Pier Oddone stated 'In this case we are dumbfounded that we missed some very simple balance of forces.' This fault had been present in the original design, and remained during four engineering reviews over the following years.[41] Analysis revealed that its design, made as thin as possible for better insulation, was not strong enough to withstand the forces generated during pressure testing. Details are available in a statement from Fermilab, with which CERN is in agreement.[42][43])

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

Large Hadron Collider's First Operation

The Large Hadron Collider has been tested on 10, September, 2008.Look here on Wikipedia if you don't know what a Large Hadron Collider is.Proton beams have already been injected into the first metres of the LHC, to test the injection process, but the first attempt to circulate beams all the way around the LHC will be on the official start up day. If everything proceeds according to plan the beam will circulate all the way around the 27 km long LHC. Over the following months the LHC scientists and engineers will commission the LHC, running beams at higher energy with the intention of beginning collisions, using relatively low energy (5TeV) beams, towards the end of 2008.Continued on this link...

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

Where can I get large( diamter larger than 3 feet) plastic pipe and how much would it cost?

I need some larger plastic pipe that I can use for a tunnel. I am looking for something that is larger than 3 feet wide becuase I want to use it for a tunnel. Preferably it is not to expensive.

Asked by workinprogress37 8 years ago  |  last reply 6 months ago

Growing pumpkins primarily FOR THE SEED. What variety do you recommend? Answered

Is there a particular variety of Pumpkin that produces large, plump seeds for roasting?  

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

Garage Bay 3D printer for large objects

Is anybody making a 3D printer that is made to fit in a single bay of a garage? Like something the size of a large SUV? Gigabot comes close, but it still smaller. For such a device, I'd like to make a modular head with a lot of potential interchangeable heads: 1. All the typical FDM 2. Milling for CNC type operation. 3. Laser for cutting 4. MIG welding head 5. Arm with gripper for auto-assembly 6. Scanner head 7. FDM using atypical materials, such as dry slurry epoxy (with microspheres or flocked cotton) Combine this with mobile robot arms to manage work pieces, and you're coming close to a complete fab lab.

Posted by GarrettH2 4 years ago  |  last reply 4 years ago

What is the correct name for this plastic?

I have seen this stuff used by machinists for jig making and small parts. What is the professional name for this plastic? I thought it might be ABS plastic but i dont know for sure

Posted by SlickSqueegie 6 years ago  |  last reply 6 years ago

Where to buy large glass tubes?

I need several glass tubes (10-20) that are around 30-40mm in diameter and 6 feet long. They also can't be rediculously expensive, I've been searching for a while, but all I've been able to find is glass with a length of 4 feet and a diameter of like 10mm. Any help?

Posted by guyfrom7up 9 years ago  |  last reply 9 years ago

From minute to large portable tripod

Hey, could someone please make an instrucable which enables your average person to make a tripod which can fit in ones pocket but expand to full standard tripod height when pulled out? Large tripods are too bulky to carry around, but small tripods aren't very practical for taking pictures from the right height.

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

A HUGE Apple!

I found this huge apple in my grandparent's back garden (yard)! I have never seen an apple so big before...

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

What is the best way to make a prop giant sword?

I'm thinking a single edge, six to eight feet in length, about a foot wide (blade to blunt side) and one to three inches thick. The design is not very ornate.

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

Jet engine parts

Hi Guys Can anyone please help me. I have recently purchased a few parts for a jet engine off ebay as a possible project but can't find what engine they may have came off.  The combustion chamber is different to what you see in smaller rc jet engine. The turbine wheel blades are dove tailed like on bigger jets and the compressor wheel has an inducer of around 95mm. I would imagine if this could ever run again it would produce a serious amount of thrust. I have uploaded some photos and would be grateful of any help.  

Posted by hughes674 4 years ago

End of World One Step Closer. Or Not.

A vast physics experiment - the Large Hadron Collider (LHC) - reaches a key milestone this weekend ahead of an official start-up on 10 September.Engineers had previously brought a beam of protons - tiny, sub-atomic particles - to the "doorstep" of the LHC.On 9 August, protons will be piped through LHC magnets for the first time.The most powerful physics experiment ever built, the LHC will re-create the conditions present in the Universe just after the Big Bang.This last sentence is the one that's caused a little panic amongst certain groups of the population - they are convinced that the experiment will create miniature black holes which will fall through the LHC towards the centre of the Earth, where they will orbit around, gradually consuing the planet from beneath our feet.When the collider is commissioned, the beams will cross paths at allotted points along the tunnel, smashing into one another with cataclysmic force.My God, have these people never seen Ghostbusters??Scientists hope to see new particles in the debris of these collisions, revealing fundamental new insights into the nature of the cosmos and how it came into being. Now that is seriously cool (well, hot, actually) - to be able to recreate what the whole of reality looked like mere femtoseconds after it started...BBC storyCritics have previously raised concerns that the production of weird hypothetical particles called strangelets in the LHC could trigger the mass conversion of nuclei in ordinary atoms into more strange matter - transforming the Earth into a hot, dead lump.Earlier BBC storyAmusingly paranoid storyAnalog Magazine article

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

Setting up two forges...

Basically I have two ideas, one of which I'm pretty ready to make now and another which will take a little longer to make, one is a tiny forge, like desktop sized, for working at home and the other is a much larger forge for big metalwork projects, thankfully the large one will actually require less parts scavenging as I have plenty of acces to scrap material and there's a brickyard over the wall from us which will do me the necessary materials very cheap, mainly because I did a little forklift driving for them for larger heavyweight loads over three tonnes. That's all well and good a big one I can get my head round easily enough, But. How would I go about making a tiny forge and I mean miniscule, it's main purpose is for heating to cast for my specialist parts I prefer making and the other is for low material single cast jewellry my mum makes (she used to own a jewewllry business and still makes the odd bespoke items. But my main question is how I can build a reliable yet compact forge and furnace, from what I have sitting around I'm sure I can come up with a decent fuel source, ranging from butane torches and stoves, both of which can do propane and I could go to natural gas (we have a special plug out the back for gas barbeques the house had it when we came...) but my other questions are a bit more odd, first of all what would make a great crucible, I need something that'll be fairly invincible to the hardships caused by life, as the other liely user of the forge and furnace is very forgetful and sometimes accident prone. Next up is the housing, would it be feasible to use a single block of thermocrete cast to make the main furnace housing, as in everything is but the fuel and air source holes and the crucible hole would be one block, as it stands that seems like the best way to make it simple and effective, plus it would be pretty airtight where needed. Next question is the fuel and temperatures, I know that butane at full combustion get 1300C and 1000C is a practicable operating temp. for a butane item but what about propane or even natural gas, since it would be very cheap and clean burning... I'm a bit of a noob towards this end of the scale, I can make stuff hot and I can do alot with these things but actual forge and furnace making is a little beyond me on this scale, however I can think of several advantages to my baby furnace, including the practical movement of it, as it could be self contained very easily. The pic was just one of the last pictures that's remotely intersting I uploaded, however it raises it's own points as the jet engine basically welded all it's components forward of the flame together.

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

Clock mechanisms?and large clock hands?

I'm building a large wall clock using Numbers stuck to wall and bought 10 quartz clock mechanism's but not one can drive or strong enough to  to drive large clock hands,can anyone help ?where can I buy from

Asked by 2Y3RXJ82NBEVGGEPCK8FE3 2 years ago  |  last reply 2 years ago

repairing large cracks in an outdoor table

I have a large outdoor wooden table, approx 2.4m long by 1m wide, made of spalted beech. Over time it has dried out and in places there are now large cracks in the surface, about as wide as a finger, all the way through the table top (about 10cm deep). What would you advise as best way to repair these ?

Posted by stevenpeeven 1 year ago  |  last reply 1 year ago

Where to buy large capacitors for cheap? Answered

Building various things, like tesla coils, railguns, and wire exploding devices, reguires very large capacitors. I need to know where to buy some with high voltage and capacitance rating around 450v and 10000uF.

Asked by macgyver603 9 years ago  |  last reply 3 years ago

What to do with large tea chests? Answered

I have got several large tea chests which were given by a neighbour to me I would like to get some ideas what I could transform them into, any ideas would be appreciated, thank you.

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

Where to find large sheets of cardboard

I know back a few years ago you could get huge sheets of cardboard from Home Depot and it was some great stuff, but now they dont do it. Does anyone know where to find large sheets of honey com or 3 ply cardboard these days? Or any 4' x 8' sheets. Thanks, Ethan.

Posted by mindstormmaster1 9 years ago  |  last reply 1 year ago

can't email large wmv file=[

I made an rsmv(roonskape music vid, hey, I was bored for a week)and i want to send it to my friend, but I don't have a youtube yet, and my kol says it can't send. what's the best thing I can do?

Posted by wolf555hound 10 years ago  |  last reply 10 years ago

Large NC (Normally Closed) Switch

I am currently working on a project which requires a larger NC switch. The concept is that when someone sits on the switch, the current will be blocked and not flow. When the person stands up, the current will flow through the circuit. This specific switch has to be flat enough for someone to sit on. Does anybody have any ideas on how to build one?

Posted by SamuelD79 1 year ago  |  last reply 1 year ago

Large High Pressure Storage Tanks? Answered

I am looking into a green power system but, I would need 4500 psi hydrogen tanks.  They are way to small to be practical, even the large 144 c.f. ones (biggest I could find).  Is there anything special about hydrogen storage tanks, or will any 4500 psi tank work, and does anyone know were to get big ones, like huge.  If not, any ideas on how to fab one.  I know a guy who is high pressure certified so he could weld it, but what thickness of metal is needed for say a 12" diameter tank about 10-15' foot long. (yea, that big)

Asked by 7 years ago  |  last reply 7 years ago

Help designing large shed for living! Answered

Hello, I am currently designing a large shed. I Have got the main look and all the lengths planned out, but I would be greatful l if someone was able to give my guidance of the constructiont, ei. Wood needed, The structuring of this wood and techniques etc. Electrics have already been planned out. I will be using insulation in the walls and floors. The walls will be plaster board, The building will need to be pretty structuraly sound so this is why I thought i would ask! This is all I have planned on construction so far. All feedback and/or critism is welcome! I have attached a sketchup file for better viewing aswell as a few photos! The sketchup file has the exact measurements. For the whole building it is 620cm x 350cm Edit: Sketchup upload has not worked so will give a link to it, I will also give out patches to anyone with very good advice! Sketchup link:;=0 Many Thanks Oscar

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

Ho to control a (somewhat) large LCD? Answered

I have an LCD that I salvaged from an old portable DVD player... I was wondering how it is possible for me to interface it with my computer. I want to do the project just for fun but I don't really know the first thing about controlling an LCD. Please help! I can post pictures and answer questions about the connections and stuff. I don't know the pixel width and height. Thanks! Sam

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