The forums are retiring and are now closed for new topics and comments. The existing content will remain online and accessible through 2020 to provide everyone the opportunity to save any relevant information. In the spring of 2021, these Community forums will be taken offline.

Search for core in Topics

Core Skills

I've been thinking about writing on the subject of core skills and or resources that branch out to other skills and allow a person to get the most out of living, building, making etc. I think that the Instructables members have these skills in spades but there are plenty of people that look at what all of you do and think "That's cool but I could never do that". Which is the opposite of what this site is about. Now I'm saying skills but I think there are also other factors that apply. Obviously having enough time to work on projects is important but really that's a skill too, time management. Tools might be another factor, things like a Dremel tool, Sugru, etc. really open up what a person can do. I'd like to consider things like that also in this endeavor. These are the core skills I've identified, some of them seem really simple but I think they need mentioning. I'm also pretty sure a few of these are already covered by ibles. Measuring Length Checking for Level and Plumb Using a Claw Hammer Using a Sledge Hammer Identifying Screwdriver Bits Powertools - Saws (what they are best used for, describing Circular, Table, Jig, Band, Scroll, etc) Powertools - Drills (best practices, maybe identifying drill bits etc.) Powertools - Grinders (Hand, Bench, Die, etc) Reading a Multimeter (and what to do with those readings) Reading a Schematic Welding Gluing (and what kind of glue is good for different purposes) Then I got a little esoteric and thought about what it takes to accomplish projects. When to do research and when to just start doing. (Because I used to spend way to much time worrying about accumulating data on a project) How to balance projects with living your life. (Because I still have problems with that. But I do have some tips. Falls into time management.) How to find that part you're missing (I haven't really thought about this one much, but it would be great to have a thought process in place. There are likely a lot more. I admit this would be a large project to compile and may span several ibles. Do you have any input on how to accomplish this? What skills have you found to be at the core of your efforts to make things? Instructables has some real brainpower here I think if there is a group that could distill this down to something manageable it would be us.

Topic by EmmettO  

Why is the core of a transformer is laminated?

Hello,This question is regarding one of my school projects assignments. I would like to know why core of transformer is laminated? Does it also depends on the size of core?Thanks.

Topic by Fanuca    |  last reply

steel cable as a transformer core? Answered

Could i use thick steel cable as a transformer core (1 inch stranded cable) if i saturated it in a nonconductive (epoxy? rubber cement? ect..?   material to eliminate eddy currents and molded it into a double C core?

Question by pwnag3    |  last reply

What is 5 core solder? Answered

All i seem to find is a #5. Thanks

Question by onrust    |  last reply

FL Studio core utilization? Answered

My brother uses Fl Studio (Producer Edition) with too many plug-ins to count.  I don't know the the number,  just that it's many. He uses it on a 2012 Dell Desktop; Intel core i3 (3.3GHz dual core with hyper-threading) , 6GB of RAM, very basic.  My question is, how many cores can Fl Studio use with so many plug-ins? Up to Six? Eight maybe? I know it should be able to use a quad up. ...And just for the hell of it, his artist Youtube and Facebook pages:

Question by The Dark Lord    |  last reply

Electro Magnetic Core Solenoid

Dear Friends, I need to lift a weight of 100 grams or 500 grams weight using a solenoid. I can use any current DC or AC. What is the procedure for calculating this. Please help me. Ramanathan PS INDIA

Topic by RamanathanP    |  last reply

Magnetic Field for hollow core?

I am working on a project in which I have to control a small setup at the end of a motor shaft using an electromagnet. The electromagnet needs to be around the shaft inbetween the setup and the motor. So I have used a metallic ferromagnetic spool(image attached) and wound 32 gauge wire on it to make it an electromagnet and put the shaft through it. Since this core made out of spool is hollow, I'm not sure how the magnetic field will behave. I tried powering up the one I made and it' seems to be both attracting and repelling a magnet's pole (edges attract while centre somewhat repels). Anyone got any idea about this?

Topic by Antzy Carmasaic    |  last reply

Core Wars: The battle of the programmers.

Okay, brace yourself for a lengthy background story: In the 1960's and 70's, computers were much too expensive for a normal person to have one all to themselves. Before the invention of the Personal Computer (PC), computer systems were mainly employed in large universities, able to be used by students. However, there came a danger with all this: Back then, there was no such thing as protected memory, meaning that someone with minor hacking skills and some knowledge of assembly could easily wreak havoc on other people's data and programs. One such urban legend is that of a major business firm's main computer system, which a mischievous employee had installed his own assembly program called creeper, who's only purpose was to create copies of itself whenever it was run. This soon became a problem, as the creeper virus began eating up precious space in the memory and began corrupting other people's data and programs. After a while, another more brightly-hatted programmer created a program called reaper, which would make numerous copies of itself and destroy any creeper virii it could find and then self-destruct. Soon enough, things were back to normal. After hearing this story, a programmer named A.K. Dewdney got the idea for a game which he called "Core Wars". In this game, people would write computer programs called "warriors" in an assembly language called Redcode. Redcode had instructions not out of the ordinary of any assembly language. These programs were then run simultaneously in a simulated computer called MARS. The aim of the game was to make the opposing program crash by forcing it to execute an illegal command in the computer's shared memory. The surviving program was declared the winner. The absolute simplest warrior was called imp, and was written by Dewdney: MOV 0, 1 The MOV command moves copies a command from one place to another, in a position relative to the MOV command. Because of this, the imp would fill up the entire memory with MOV commands in a relatively short amount of time. Because the memory loops around (So, if the size of the memory is 8000 commands, then command 8001 would be executed as command 0) then it meant imp would always hit it's target eventually if it wasn't hit first. Another program which was written by Dewdney is called Dwarf: bomb      DAT 0,0 Dwarf     ADD #4,-1                 MOV bomb,@bomb                JMP Dwarf End Dwarf This is the first example of a "bomber" program. This program would drop DAT 0,0 (An illegal command) at every fourth slot in the memory in the hopes that the other program would accidentally execute it (cookie if you can figure out how it works). There are far other types of examples, like scanners, which try to scan the commands around it to see if they are illegal. Some programs can even repair themselves mid-battle. So, does anyone else still partake in this ancient game? I recently just got into it, writing my first warrior program a few days ago. Have no idea if it works, but it sounds pretty cool. It's based off of Dewdneys Dwarf but with a few modifications (I named it MindSplitter): bomb      SPL 1                 JMP -1                 DAT 0,0 Split        ADD #5,-1                 MOV bomb,@bomb                JMP Split End Split First off, this plants bombs at every fifth command instead of fourth, which I hope will help it spread out. Second, the bomb it uses is my personal invention that I call the Splitter bomb. In Redcode, the SPL command will jump execution to the specified command, while at the same time continue executing the commands after it. The idea is that the SPL will split to the jump command while the normal execution goes to the jump command, and both of them jump back to the SPL, therefore filling up all of the enemy programs processes. If the enemy program somehow manages to escape the loop, there is a deadly DAT after it. I haven't tried this out yet and I'm not sure how it would do in battle. If someone with a MARS emulator and a warrior of their own would like to put it to the test, I'd would absolutely love to hear how it turns out :).

Topic by dungeon runner    |  last reply

Minecraft draws only one core? Answered

I play minecraft and while playing the only core that gets any work is Core 4, and it is reaching 100% usage, what is wrong, and is it decreasing performance, everything else runs balanced.

Question by    |  last reply

The force of the coil without iron core Answered

Dear All..  If two coil A and B without iron core same as (size) dimension  and but coil A winding with 28 gauge and coil B with 32 gauge magnet wire Please help me to know : What is name coil more force for  attract a piece of ion metal. Many Thank you                                                                            Best regards                                                                                         lam

Question by lam    |  last reply

Will this motherboard support a dual core CPU? Answered

I'm helping my friend do some upgrades on his computer, it's a Compaq Presario SR2034NX desktop. I'm wondering if it will support a dual core processor or not. According to HP, it doesn't, but looking around on the internet, I've seen quite a few people have upgraded to dual cores. However, there's some minor differences with this particular motherboard. It seems that there are actually two different types of motherboards with the same model number from Asus (A8M2N-LA). On the HP site they have different HP model numbers (a more advanced board - the NodusM3-GL8E, and the one I have - the Naos-GL6; both with the same A8M2N-LA number for Asus) It appears that the NodusM3-GL8E supports all sorts of fun things like 8 GiB of DDR2 800 RAM and dual cores up the wazoo. However, the Naos-GL6 looks like a stripped down version of the NodusM3-GL8E (two less RAM sockets, etc.), so it might not support a dual core. I'd like to know before purchasing, since Newegg won't accept processor returns for a refund. Also, 800 Mhz RAM would be nice to have, HP says it only supports 667 Mhz RAM but other people have put 800 Mhz in with no issues. Does anyone know if my friend's mobo will support a dual core and 800 Mhz RAM?

Question by RelaxedSoup    |  last reply

Replacing the CPU on a laptop to a Dual-Core? Answered

I recently downloaded Call of Duty: Black Ops, but there seem to be some problems. My CPU simply isn't powerful enough run it. Price is no option, all I need to know Is whether or not it is even possible to replace the CPU of a laptop. Any recommendations for a dual-core processor, and/or help installing it would be greatly appreciated. EDIT 1: Dayum, that's a lot of suggestions... but very helpful nonetheless. After careful consideration (and some extra cash) I believe an Alienware shopping spree is in order. Thanks everybody :)

Question by jrg3ni0us    |  last reply

What material works best as a CORE for a small coil at about 500 hertz?

I am building a small coil with 1000 turns of 36 gauge wire wound around it.  A 12 volt/ 500 hertz squarewave will feed the coil.   I want to receive this 500 hertz tone a few feet away using a sensitive receiver that i have.   However, i am having trouble figuring out what kind of CORE to use and where to purchase it.  I built several coils using various items such as steel, iron, and ferrite from a flyback transformer.  So far, the plain old STEEL works the best, but I keep thinking something else might work better.   I searched the internet, but it starts to get really confusing because of all the terminology like "flux density", permeability, field strength, mu, etc etc.  It must be something that does not retain magnetism when the coil is de-energized.  Any help would be appreciated !

Question by framistan    |  last reply

Can one use a single core of a dual-core processor to create a "virtual" graphics card? Answered

 I have a laptop (Thinkpad R61) that has a dual-core processor but horrible integrated graphics. Is there some sort of software that can "split off" one of the cores and use it to simulate a dedicated graphics card? I'm running 32-bit Windows XP at the moment, which might make it difficult to fully utilize the dual-core setup. I'm open to any suggestions that involve Windows 7 or Linux - both are pretty easy for me to get / install.

Question by idea_flood    |  last reply

Where can i get small toroids for magnetic core memory?

I have really wanted to do this but I could never find those pesky rings!

Question by seanroberts    |  last reply

Mk7 extruder help

Instead of buying the extruder I plan on making it instead using various parts I have already however I do not have the thermal core. I am capable of milling and if not I know someone with a CNC what I don't have that I need are the "EXACT" dimensions of the thermal core can anyone give them to me?

Topic by pattyshaw    |  last reply

Flux core welding wire any good? Answered

Im looking at wire feed welders but I don't want to screw around with gas, So is the gas less flux core wire any good??

Question by camping crazy    |  last reply

What is Google "broad core" algorithm update?

Can anyone have technically knowledge about Google "broad core" algorithm?

Topic by kbihmdigital    |  last reply

Which one is better dual core or intel

I am confused if there is any difference between intel and dual core

Topic by stephenward    |  last reply

DC motor core insulation from windings? Answered

I have recently attempted to rewind an old 240V AC drill motor to a low voltage DC one. After winding the 12 coils I found that all of the windings were shorted to each other, I'm assuming this is due to the thin enamel coat on my wire breaking against the edges of the steel core. As a result I need to rewind it, but I am unsure what kind of insulation to use, tape, some kind of glue or sealant, varnish, I was thinking a hardware store type product nothing online or that costs a lot. 

Question by The MadScientist    |  last reply

Out of Curiosity, has anyone ever worked with the Hadoop Programming language?

I was just curious, as I came across this reference not long ago: Apache Hadoop Core is a software platform that lets one easily write and run applications that process vast amounts of data.At this link

Topic by Goodhart    |  last reply

Looking for big tansformer cores for high frequency use... Answered

Although I have made more and more progress with my home made ferrite I am not in the need for a big transformer core for testing purposes. Desired frequency range: 30-120kHz Required power: 2kW I looked through endless pages of theoretical science stuff, a lot of useless online listings and thought: Why not do what everyone does instead of using Google and ask my friends here? ;) So far I think an iron powder core might be better in this case than the more traditional ferrite cores due to the power and saturation levels. But what size would I really need so the  whole thing won't saturate or overheat? Ring core or better a pot core?

Question by Downunder35m    |  last reply

PC with a dual core 3.0ghz processor and 8gb of ram?

Hello!  I need to buy a video editing PC, I need a dual core 3.0ghz processor, and 8gb of ram. Thats all I need.  Can you tell me some models that has those specs?

Question by dsirotic    |  last reply

I want to remove the core from a flyback transformer?

For experimental purposes i want to remove the ferrite core from a flyback transformer. I want to be able to remove it without damaging the primary or secondary windings. I don't care if the core is ruined. Someone suggested boiling the transformer in water.  Has this been successfully done or is this an untried suggestion?    

Question by Blake    |  last reply

How much power can this ferrite core take?

I have a ferrite transformer core and I was wondering how much power it could take?  And at what frequency would you recommend I drive it? I am planning this for a HF battery powered inverter I'm planning 24-36V input,  200-400V output.

Question by The MadScientist    |  last reply

Ferrite Beads

I want to make one of those joule thiefs and I live in the USA. I don't know why I want to make it, I'd never need it/use it... BUT I MUST HAVE IT!!! I'm looking for tiny ferrite beads (toroidal shape) that are cheap (less than 10cents a piece). They CANNOT be leaded

Topic by guyfrom7up    |  last reply

What type of socket has processors that are exactly 1 GHz, 2 GHz and 3 GHz?

I need a 1 GHz processor, a 2 GHz processor and a 3 GHz processor all with the same socket and all with the same number of cores (all single core or all double core).

Question by danielemur    |  last reply

In Spain, looking for clear teflon tube for a lightpipe.

I guess this question has two parts. I'm prototyping a solar energy device, part of which is a light pipe to transport the collected solar energy, about 300 - 2500 nM. I'm planning on making this from a flexible tube filled with a highly refractive liquid, stoppered at each end with clear plugs. It looks like the materials I should be using are: Tube: Teflon (PTFE, FEP, AF 1600, AF 2400) in that order of desireablitity, lowest to highest. The AF 2400 has a refractive index of 1.29, which is the lowest of any polymer. Apparently. Core: Mineral oil / liquid paraffin. Plugs: Acrylic or normal glass. Thoughts? Also, where would you suggest I try to find these? (I have the mineral oil already) Keeping in mind that I'm in Madrid, Spain. Getting this to work would make a huge difference to solar microgeneration, as transporting the energy is currently a bit of a nightmare. Thanks heaps, Daniel.

Topic by SolarFlower_org    |  last reply

Does anyone know how to fix a flyback transformer core?? Answered

Hi. I recently took apart an old CRT and removed the flyback to experiment with the high voltage output. Unfortunately, the core cracked when I was working with it. A sizable chunk even came off, but I reattached it by carefully fitting it in the slot and gluing it in place. Now the output voltage is much less spectacular from which I have seen other people do with the same transformer! It works, but I think the damaged core is where the problem is coming form. Does anyone know how to repair it better then what I managed to do? Thanks!

Question by transistorguy    |  last reply

A Question about transformer? Answered

In transformer formula , the primary turns and secondary turns affect the voltage and current directly. Why some transformer output voltage is affect by frequency and core type , just like Flyback Transformer(LOPT) and Tesla Coil specifically is Solid State Tesla Coil?

Question by james34602    |  last reply

Fictitious Planet Details. Answered

         For a personal project of mine, I am creating a fictitious solar system with planets that can sustain life.  To make the project more realistic, I have a set of rules. Mainly, the planet and its inhabitants have to able to exist. I really want a unique planet, and I have it all figured out, except for one thing. The core. So, my question is this:           Could a planet have a gaseous core, and have it very dense and hot, much like a little star, as well as a solid outside? If so, how could it have formed?  

Question by eulaliaaaa!    |  last reply

Designers Wanted: Join a Think-and-Make-Tank for Soul of Africa

Oxford University's Said Business School is running a sort of Peace Corps for designers. Writes Lucy Kimbell, Clark Fellow in Design Leadership: We need up to 10 designers who want to use their design practices and skills to help social enterprise Soul of Africa tackle some of the challenge facing it, during a one-day workshop in Oxford in collaboration with MBA students. The workshop is a participative, creative "think-and-make-tank" that brings together people from management and from design to use visual methods to analyze and tackle specific problems identified by an organization. MBA students from Said Business School will be joined by designers from different disciplines to help social enterprise Soul of Africa engage with key challenges. Soul Of Africa is a charitable initiative and a self-sustainable project created to facilitate employment and funding aimed at helping orphans affected by AIDS through the sale of hand-stitched shoes. Unemployed and unskilled women in South Africa are trained to hand-stitch shoes, giving them the self-empowering ability to feed their families and provide them with essential health care. Download more details here. What we are looking for Designers (recent graduates, current MA or BA design students, and design professionals) are invited to take part. Ideally, we'd like a mixture of people from these backgrounds: - visual communication - product/industrial design - service design - interface design - fashion - design management How to get involved To apply, send an email to Lucy Kimbell at to arrive on or by Friday 20 March 2009. The email must include - your name and contact details and any institutional affiliation - your design discipline (eg product, visual communication) - up to 150 words on why you want to participate. Successful participants will be contacted by Friday 3 April at the latest. Reasonable travel expenses to Oxford (standard class return, UK travel only) will be reimbursed to those who attend the workshop, on the production of a receipt.The Design Leadership blog is here.Via Core77

Topic by noahw    |  last reply

Can anyone help me make sense of a ferrite core datasheet? Answered

I need help understanding a datasheet for some ferrite cores I bought to wind transformers on.  This is the datasheet:  The main thing I need to know is the inductance per turn of wire on the core so I can design the transformers to minimize inductive reactance and such.

Question by UbuntuNinja    |  last reply

How can I make cheap honeycomb core boat hulls

I saw a 'How It's Made' episode where they revealed how to make honeycomb core simply by making a paper accordion, expanding it, dipping it in resin then sawing it into cores. I WANT TO DO THAT! They said they used a thermoplastic paper as well as a heat-activated glue. But why couldn't I use a cheaper more readily available material? Does the resin provide ALL the structural strength, or does the thermoplastic paper itself provide the strength? I would assume it's like fiberglass, whereby after it's infused with resin it's super tough... but the fiberglass itself provides strength too... What kind of material could I use for this? Straight up craft paper & elmer's glue? After the cores are cured and cut, I'll sandwich them between various layers of either wood laminate, plastics, fiberglass, or carbon fiber. Thanks!

Question by jmlidea    |  last reply

Why is my PC slow (3GHz Quad Core SiS 66FX)? Answered

Hey, I'm just fixing up my PC that we got from our old computer guy and I found that it's speed is terrible. There is not many programs on it, I've cleared it from ad ware and have Microsoft Security Essentials on it with Avast Anti Virus. It was hand built I believe by him (That could be a reason) and I mostly assume it is the graphics card. It runs Windows XP 2002 and has no software adjustments on it. Though I would prefer Windows 7 Im fine with XP. Anyhow, here are it's specs: Microsoft Windows XP Home Edition Version 2002 Service Pack 3 Intel (R) Pentium(R) CPU 3.00GHz 3.15GHz, 992 MB of RAM (About 1488MB of Initial Virtual RAM but 2976MB of Maximum Virtual RAM) A SiS 661FX Display adapter Plug and play monitor (Square not widescreen) When  I open up Processors in Device Manager, it shows to items called Intel(R) Pentium(R) 4 CPU 3.00GHz Those I think are the mainly important details you should know about. Please reply if you have a suggestion (Also, on games like Roblox I get about 5FPS lol, my main pc gets about 60FPS)

Question by knexpert1700    |  last reply

Does anyone know how to make a "lawn core plug aerator?

What i meant was...instead of using spikes to aerate your lawn. There are aerators that go into the ground and pull little plugs of dirt out so water and fertilzers can better your lawn.' i saw a few online but i was wondering if anyone knows how to make one for cheaper.

Question by playful mom    |  last reply

How could I make a carbon fiber table with a foam core?

I'm looking to see if it's possible to make a carbon fiber poker table using foam as a core to keep the weight down. I have instructions on how to make a poker table so I'm curious to know steps to do a wet layup of carbon fiber to create the table.

Question by zacreth    |  last reply

Which CPU is faster? Answered

A 3.6Ghz Dual core, or a 2.8Ghz Quad core?

Question by bowmaster    |  last reply

Can i replace my CPU easily? Answered

If i was going to replace my CPU (from say, a 2.8 Ghz core 2 duo to some sort of quad core) and my motherboard was compatible with both, would i be able to do it? I know how i could physically do it, but would it mess with my bios etc? I'm confused with what to do on the software side of it. Please help.

Question by tudgeanator    |  last reply

Can I weld aluminum with a mig welder if I have flux core wire? Answered

My parents got me and my younger brother a mig welder for Christmas they also got flux core wire because gas is expensive. But my brother keeps saying that we cant weld aluminum with it I have heard of aluminium flux core wire but he still says it wont work. Dose the aluminum flux core wire work any good or is there something else we need to get?

Question by Dalen Brewer    |  last reply

CPU Upgrade????? PLEASE REPLY!!!

Hi all. I am looking to upgrade my CPU cooler in my pc. Mycurrent cpu is a Pentium 4 3.0Ghz. My Motherboard is an Asus P5KPL-AM-EPU. I am trying to decide whether to buy a Pentium Dual-Core E6500, or a Core 2 Duo E7600. I USUALLY buy from CircuitCity because of their prices. Again, my choices are: Pentium Dual-Core E6500 Core 2 Duo E7600 I want something BETTER than the Pentium 4, but I dont want to spend much more than 200 dollars, preferably.. closer to 120 or so.. I know that those prices are CHEAP for a CPU, but well.. I dont have the money for a NEW pc, or a Core 2 Quad or expensive Core 2 Duo. If you're wondering why I dont have the money for a new pc or a more expensive CPU, Its because im 12. :D PLEASE REPLY ASAP!!!!!!!!!!!!!!!!!!!!!!!!!! THANKS FOR YOUR TIME!

Question by sci4me    |  last reply

CPU Upgrade?

Hi all. I am looking to upgrade my CPU. I am currently running a Pentium 4 at about 3.0 GHZ. I was thinking about these: Pentium Dual Core Core 2 Duo Core 2 Quad Xeon E3110 I am running on a socket 775. I have a graphics card. I dont think there really is anything else to say. So, what cpu from the above would give the best Bang For Your Buck? The games i play are Grand Theft Auto San Andreas, and Call of Duty 2. I may get COD-MW2 and GTA4. Again, which CPU should i buy? I buy from Circuit City. THANKS!

Question by sci4me    |  last reply

How can a make a giant check? Answered

 I want to make a giant check to display in my room. I plan to use foam core board for the check. My problem is adding the graphics, lettering, ect. I dont want to hand draw it but I dont have photoshop. How can I design the face of it? I have as my photo edititing.

Question by imthatguy1125    |  last reply

Can you make a brushless motor with "axial" cores and magnets, rather than radial?

In the picture, the black discs are magnets, the copper cylinders are coils, and the acrylic disc spins on the central shaft. 

Question by DrNerdington    |  last reply

Is a dual core fully loaded Powermac G5 Better than a fully loaded Mac Mini? Answered

I was looking around and am wondering is a dual core fully loaded Powermac G5 Better than a fully loaded Mac Mini? How is both of them against the mac pro with 4 gigs of ram?

Question by robots199    |  last reply

Which would be better for storing sensitive information in an iPhone App, Core Data or SQLite?

I am making an app that involves sensitive information.  Which is more secure?

Question by drmjj55