Measure Punch Force tool

Hi All, I do understand we all keep creating new electrnoic tools/gadgets everday. But anyone had tried to create a tool which can measure force / intensity of human punch. It is fun to measure your punch force among friends. also if help us to improve your boxing strength. Please share your thoughts on it. Thanks

Posted by VinitV 11 months ago

Calculate magnet repulsive force?

I'm looking to make a "floating" model by insetting NdFeB rare-earth magnets with same poles facing so they repel. Now, magnet selling places specify the "pull" a magnet might have, say 1.2kg. What I would like to know is if the repel is equal in magnitude as the pull if two similar magnets are placed with same poles facing, is the force exerted 1.2kg and so I could float 1.2kg of stuff? Also, does stacking magnets double the attractive or repelling force, i.e. do two 1.2kg magnets stuck together lift 2.4kg of stuff, negating the small difference in distance of one magnet from the object? Is there a way to calculate the distance between two opposing magnets with a force applied. Does it follow the inverse cube rule? And if the stacking does work, do I also need an equal number of magnets on the other side for repelling, i.e. a stack of two 1.2kg magnets repels 2.4kg with one 1.2kg on the other side, or not? Does the magnet on the other side have to be the same force? Lots of questions but hoping someone can shed some light on this as I've not been able to find anything about it :-(

Posted by chiok 9 years ago

Knex Gun Force Standard

The problem is that almost no one has enough room inside to shoot a knex gun unless it's a total peice of get the point. But, by going outside there are many other vaiables that effect how far a gun can shoot (eg. Wind direction/ speed, trees and other obstruction, etc.) Also power as in "can shoot through can" or "through 3 sheets of hard cardboard" can also be misconstrude in the way that range from the can is a main factor, point blank range is not always the most powerful range, often 1-3 inches away has exponentially higher power. What needs to happen is a tool be built (out of K'nex, what else?) that is not only easy to use but impossible to mess up, it should be able to give 100% accurate reading for all types of guns from the weakest to the most powerful. Also in terms of different types of ammo, rod size shouldn't matter( thats what she said) the only thing that should matter in terms of ammo is whether it is deer slug, rod, sligshot/ catapult rod(a rod with something the can grab the elastic), or other and specify what that is.Range is all to often streched beyond reality by saying it can shoot 200 yards, when really it might be able to shoot 50 yards tops when pointed strait but 200 yards if it is pointed strait at the sky. We need to bulid a target that you shoot from maybe 5 feet away and something mesures force, be it cardboard, or cans, or plywood, maybe even something that leaves a dent in it and you can mesure the depth of the dent to tell you how much force (eg. 1/2"=1, 1"=2, 1 1/2"=3, etc.)Also one last idea if you would prefer to stick to range outside, is that you divide the range in feet, by the number of cardboard sheets(or other medium)the gun can shoot trough at point blank range (say it shoots 63 feet, and through 4 sheets of thick, corrugated cardboard the equation would be F= 63/4= 15.75, so your force rating would be 15.75)These are only some ideas to get all of you thinking about a standard in K'nex gun power.-TheXenk

Posted by TheXenk 9 years ago

Anyone Have experience with Adafruit Square FSR?

I am hoping to create a circuit that will variably control the speed of a motor through pressure. If I were to wire up one of these , simply as the switch between a small motor and a power source around 5v, would it work to simply turn the motor off at rest and vary the speed with pressure? Is there a way to use this resistor as a "switch" without using an Arduino or  other micro controller? Any help is appreciated. Thanks! 

Posted by Flashflint 3 years ago

My chemistry textbook was right all along!

As reported in Physics World today, a team of Swiss and Dutch physicists have developed a novel tip for an atomic force microscope (AFM) using a single carbon monoxide molecule. The tip is stable enough to image individual atoms and bonds within molecules.The first image below is from the group's AFM of a single pentacene (C22H14) molecule on a copper (Cu(111)) substrate. The second picture shows the conventional chemical structure diagram (the vertices are carbon, and one hydrogen hangs off of each exterior corner), and the third is a "ball" model, with carbon atoms in black and hydrogen in white. As discussed in the article, the whole molecule is just 1.4 nm long, with a spacing of 0.14 nm between adjacent carbon atoms.The paper is out in today's Science, but it's pay-per-view.

Posted by kelseymh 8 years ago

I sense... a disturbance in the Force...

Oh yeah. Bill Gates didn't go to work today.He doesn't work for Microsoft anymore....Even if you're not a Microsoft fan, you have to admit, without Mr. Gates, where would the computer industry be? Where would we be?Flash back time:Ah, yes, I remember my very first personal computer... It was a Hewlett-Packard (not an "hp" ;-) with a MONSTER-sized monitor that took up a good 3/4 of my desk, a clunky keyboard and a "ball" mouse. It was running the latest OS: Windows 95. And get this: we were the first people on our street to get this new thing called the "World Wide Web" - whatever that meant. Our Service Provider? MSN, of course! Man, with my new computer (okay, in truth, it was a hand-me-down from Dad), I was the coolest 6-year-old in kindergarten. I had it made.Yeah, MS has made a a few mistakes...*cough*Vista*cough* (doesn't that go without being said?), but Gates and his company really did shift the industry into gear, and they aren't stopping any time soon.So, gentlemen, I ask you to join me as I tip my hat to Mr. Gates. Without him, I don't know who I would be.

Posted by Labot2001 10 years ago

kenpachis force

Hey its about time i post some thing and since i got a ss coaster i figured id try it out the station is almost done and all i need is a curve part to it (pics will be up around 4)

Posted by knexsuperbuilderfreak 8 years ago

FSR - Conductive foam readings

Hello! I am making a prototype of a force sensitive resistor, and i am using, to old 97%kobber coins, metal sheet and a tiny piece of conductive foam that i got from a tv-repair shop. The setup is not very good, but its a start, and i am planning the next move for better results... Now... I want some decent understanding of how the readings work, and why I get these results.. First test, are written with black, and and as you can see it, has the same amount of space between 0-1kg and 1-2kg, but 2-3 and 3-4 changes to a very small space? Why is that? Second question is, that i have used the x10, to read larger forces. 0-2,5kg and 2,5-5kg has same amount of space. Will the space decrease too, when getting further up the scale too?  - I know the conductive foam has its limits too, but just to be clear of my readings. Thanks in advance! I hope you can see the readings on the picture..!

Posted by L33boy 3 years ago

"Knex War?" (The Math Bit)

Hey guy! Sharir1701 here and I just want to start off by saying that I'm not back into Knex warfare, but I have something to show you. About a year and a half ago, I posted this forum topic. There I explained why, in my opinion, just adding more rubber bands to a gun will not actually produce an overall better gun (past a certain, low point). I'm not getting back into that discussion, but I simply wanted to share something regarding that. Don't ask me how or why (I don't know, myself), but a few days ago I suddenly remembered that old assumption I made. Being a perfectionist, I hate leaving things unfinished or unexplained (particularly math and physics related inquiries). Back when I posted that topic, I had little to no formal Physics knowledge, and the beginnings of an understanding in mathematics. Now, I have a much broader understanding, much more knowledge, and an ability to explain and evaluate what I once couldn't. Anyway, what I'm trying to say is, back then, I didn't have the tools to prove my claims. I firmly believed in them, but I couldn't confirm them. It's nothing complicated, but, like I said, just something I'd like to share. I also want to point out that, although I personally don't enjoy spending days upon days perfecting a little plastic mechanism for firing (mostly) non-aerodynamic plastic projectiles, anymore, there still is a warm spot in my heart for the craft I once loved. More to the point - this is a small article just showing something I did in a few minutes the other day, that helps me to better understand how a Knex gun works. I hope that in writing this, more people that are still building guns, will think about more accurately calculating certain things about their guns to help improve their performance and hopefully produce more efficient guns. The final note I have is that I'm about to show you equations, all of which can be plugged with real, measurable numbers, to calculate to a high degree of accuracy, the forces at play. This means you can actually calculate the most efficient layout for a gun, and also that in designing your next, you will be able to use these equations, and many others, to find optimal solutions to your problems. So, what's all this fuss about? Well, basically, I just proved with a few, painfully easy equations that my conjecture about the forces in a gun, working on the pin, is true. I'll just get to it: First, Hooke's Law states that the force necessary to change the length of a spring or a (tense) rubber band is F=K*dX, where F is the force, dX is the distance you want to change, and K is a constant number, that each rubber band (or spring) has. You can quite easily measure both of these. For rubber bands connected parallel to each other (assuming they are the same type of rubber band, which ever is your chosen standard), this equation becomes F=K*dX*N, where N is the number of rubber bands used. dX and K are both constant in the regards of the pull of a pin on a standard Knex pin gun. Therefor, the amount of force required to cock a pin (pull it back to it's full length) is linearly correlated to the number of bands you put on your gun. Next, if we examine Newton's equation of work and energy, W=dE=F*dX, where W is the work, dE is the change in energy in your system (input from an external force, i.e. your hand), F is the force applied along a length of movement, and dX is that length. Let us define the base position of the pin (not cocked, minimum tension on the rubber bands, fully in the barrel, etc.) as having 0 energy. This then means that the work applied to the pin by cocking it is equal to all the potential energy it has. From this, plugging in the force, we get Ep=K*(dX)^2*N. Let us assume a perfect world, where we neglect the effects of friction and air resistance, and assume all the momentum of the pin is transferred into the bullet as it fires (I will briefly mention in the end, why everything we're neglecting here just strengthens my claim in reality, but let's continue for now). After being released (in other words, shot), the maximum velocity the pin reaches right before the end of it's journey can be found using the equation for kinetic energy Ek=1/2*M*(Vmax)^2, using the fact that (again, neglecting energy wasted as heat due to friction) the energy is conserved, as no external force is working on the system, which then means that Ep,start=Ek,end => K*(dX)^2*N=1/2*M*(Vmax)^2 => Vmax = sqrt(2*K*(dX)^2/M) * sqrt(N). The first sqrt term in the final equation is all one big constant (again, K is the ratio associated with the rubber band, dX is the distance the pin travels, and M is the mass of the pin), meaning we can conclude that (C for constant) Vmax=C*sqrt(N). Finally, force applied by a moving, massive object can be calculated using Newton's second law, F=dP/dT (P is the pin's momentum, T is the time it takes for the pin to go from velocity Vmax to 0, transferring all it's energy into the gun and the bullet, but as I said, let us assume all of it goes into the bullet), or F=M*dV/dT (M, mass of the pin, dV is the difference in velocity, Vmax-0, which is simply Vmax. This is because P=M*V, which means dP=M*dV, ignoring relativity). So, F=M*C/dT*sqrt(N). The time varies slightly, but insignificantly, so let us assume it is a constant. So that's it. The force exerted by the pin on the bullet is some constant (calculatable, as mentioned and as shown), times the sqrt of N, the number of rubber bands on the gun. So there you go. Just a little something I did out of the blue the other day and thought I would share a proof of my conjecture from what feels like eons ago. I hope you enjoyed. Finally, I would like to tell you guys, perhaps as a little tease, since I'm not sure if I will ever upload it, but I have made 1 more gun after I stopped posting. I have already slightly teased about it in my user info. I guess I'll tell you guys what it is if I'm already posting something here again :) Possibly my most enjoyable, most well received, and quite innovative gun of all time? The REMPAR-2. I built the REMPAR-3 (I was also going to call it S5 when I thought about posting it). In a brief summary, it's a pump action, chambering (or bolt action as I and many others falsely used to call it), magazine fed rifle, that's only 5 layers thick all over, except one tiny area where it's 8 layers thick (1.5 extra on either side), as a reinforcement, not necessary if you use less rubber bands. Oh, actually, there's another small necessary area where it's 7 layers thick, but it's tiny and doesn't make the gun look bulky at all, and who cares. Plus, the one is around the pump, which looks quite natural, and the other is "disguised" as a detachable sight (not really detachable) that also looks fine. It also looked fairly good for a gun that I made, it used (if I remember correctly) a grand total of 0 broken pieces, which is a big accomplishment for me (the mag has some broken white rods, but fuck off), and it worked flawlessly, reaching ranges over 80ft and being able to go at 2-4 rounds per second, depending on your skill level with it. In other words, I could shoot 4rps; My girlfriend, with no experience or practice, could do 2rps, which says something about the gun's comfortability and ease of use in my opinion. It shot blue rods up to an accuracy of about 5x5cm (2x2in) over 30ft, which is amazing for a Knex gun, and it was truly super comfortable. It wasn't even long at all, which is saying a lot, looking at some other people's attempts at 5-wide pump actions (I may also be guilty of an attempt several years ago). Being quite short and only 5 wide, it is also quite light. I'm sorry, I just really liked this gun, I think it was truly my best creation ever (of course, the S3 is by far the most innovative gun I've made, but it's mostly a concept gun, not meant for real effectiveness). I may post it in the future, but I'll make no promises. I suppose I won't leave you guys completely hanging and take a picture of it. Oh yes, there's also a neat, fun little thing I did, originally because I saw no other option, but then I actually really loved it. I'm talking about the mag-lock. It locks automatically (there's a band on it, but it ripped a long time ago, so...) and the mag cannot fall out. Then you pull on it with your middle finger, similar to a trigger, and the mag just drops right out. Love it :)

Posted by Sharir1701 3 years ago

Principles of aerodynamics

The forces and counter forces of flight

Posted by SoDDiggerCpl 11 years ago

knex game enhancer for the force unleashed.

This is a knex light saber I made for the up coming game the force unleashed for wii.

Posted by the_burrito_master 10 years ago

Sad decline, forced registration

I think it's pretty sad if you can suddenly not look at secondary pictures, or some pages of an instructable, without being logged in, if this pathetic behaviour continues I will have to un-register and stop visiting.

Posted by Whatnot 9 years ago

Centrifuge forces

Does anyone understand the different RPMs in centrifuges that will separate liquids from solids, such as Sea Salt out of Sea Water?

Posted by SeaCub 8 years ago

Force sensetive resistor parallel circuit

I am new to posting questions in forums so please forgive me if I break any rules. I am trying to build a simple parallel circuit to light up 24 LED's with a simple battery pack with 2 AA batteries. I would the lights to come on when a baby touches 1 or more of the 4 Force Resistive Sensors that I will be using. I would appreciate any guidance with building this circuit, any any schematics that would help. I have limited electrical/electronic knowledge. Thanks for your help guys. Cherrick Gordon - The babymaster.

Posted by babymaster 5 years ago

« 502 Bad Gateway » when loging in.

Hi !Each time I visit, I'm forced to log in. And once I submit my password and nickname, comes a white page with :502 Bad GatewayThe server returned an invalid or incomplete response. Then, to access the site, I'm forced to reload the page : And when I come back to the site again later, I'm forced to login again (with the same problems), and that, despite I checked the "keep me logged" (or something).What's going wrong ?? Is this related to the Instructables Robot Major Malfunction ??

Posted by chooseausername 10 years ago

How to force voice calls through A2DP bluetooth device

Hey all,  I have an A2DP bluetooth music receiver hooked up to my car. I connect my iphone to it. here is the link to it. It plays music pristinely through the device.  But when I try to make a phone call, it doesn't send the dial tone or the call through the bluetooth device, but only through the iphone. Is there a hack to force the call through the A2DP device? Thanks

Posted by D4VIDLE 3 years ago

Plain editor

PLEASE fix the basic editor in the answers section. It can't be that hard to force a into the html on a CR character.

Posted by steveastrouk 8 years ago

High Pressure bar - I see potential

Hmm, Browsing The electronics goldmine, I saw this: Summarized: High pressure loaded hydropneumatic gas spring. This compression spring has an extended length of 32" with an inner rod diameter of 8mm and an outer cylinder diameter of 18.25mm. The compression force is 360 newtons (80.9 lbs of force) and a stroke of 366 newtons (82.2 lbs of force) The first person to post an idea for what this can be used for gets a patch! And maybe other people if I like the idea!

Posted by schumi23 5 years ago

device that applies braking force proportional to speed?

Hi, I'm helping a team of students make a brake-assist device for a two-wheeled walker.  We were wondering if there are mechanical brakes out there that apply a force proportional to the speed.  A circular damper, is how we would describe it, I think.  Or something like a gas shock (the things on screen doors and car trunks) but with a circular motion rather than a linear stroke.  Anyone have any ideas?  Anything that's commercially available, small, and somewhat inexpensive is fair game.  Bonus points for things that can be made by hand..  Thanks!

Posted by _mattb 8 years ago

Bite force transducer embedded in a gumshield

I am a quadriplegic and paralysed from the shoulders down. I am working on a project to allow me to control a go kart. I have limited use of my arms which should allow me to control the steering but I am trying to get another degree of freedom to control acceleration and/or braking One of the ideas is to use a piezoelectric type force transducer in the mouth to control and acceleration via an arduino or similar. The transducer would detect bite force and it would be converted into control signals for the throttle and/or brake. It would be embedded in a gumshield and it would be acceptable to have a cable coming from the front of it to the control System. I am wondering has anyone worked on such a project and could anyone point me in the right direction please. The gumshield may end up looking something like the image here.

Posted by greenonyx 4 years ago

Electromagnet using permanent magnets

Hi All, I'm attempting to make a very small strong electromagnet using permanent rare earth magnets. I want to boost the magnetic field and increase the magnetic force. The magnets are 10mm in length by 5mm in radius. I have 0.4mm2 enamelled solenoid wire for the winding. My questions are, Is it possible to increase the force of a permenent  magnet? Will the induced flux into the magnet compile the force or will the EMF have to be greater to see an effect? Will paralleling two windings make the EMF stronger? As the magnets are small I have limited room to wrap windings so is there a more effective method? Any help would be great!

Posted by JimmyM5 3 years ago

Constantly being logged out of instructables

Ubuntu linux 11.10 Chrome browser version 18.0.1025.168 How long is the timeout before you have to sign in to instructables again? I log in, have a look around, head off for a short while (as little as an hour in the last case) and I am forced to log in again. Why not allow "Log in forever"? It can't be for security reasons as autocomplete has my information and I just click login anyway, I would just rather not be forced to click login when I go to a new page, which takes me back to the homepage and forces me to go  [<-] back, [<-] back, [F5] refresh, and then click on the link I clicked in the first place.

Posted by gregoryfenton 6 years ago

Knex ammunition

Nearly all Knex guns fire rods or connectors that are only 1 wide and 1 height  the length varies, but why not fire rods which are 4 pieces taped together so they have more force behind them and you can tell if you've been hit unlike some single rod guns where they have great range but little force. Would anyone make a gun like this ?

Posted by Ojsmudge 5 years ago

Autodesk and Makerbot are joining forces

Great news!  Autodesk and MakerBot Industries are working together to take personal design and manufacturing to the next level. Now you can simplify the process of printing your 123D designs directly to a MakerBot Replicator. Soon, you’ll be able to purchase MakerBot 3D printers through If you sign up for a 123D Premium membership today, you’ll also receive a special discount that you can apply towards the purchase of a MakerBot 3D printer.

Posted by kazmataz 5 years ago

Android App Crashes Playing Video Clips

Android App Crashes Playing Video Clips I noticed when I click to watch a YouTube video someone has linked on your Instructable it always Force Closes.  The error I get is: ______________________________________________________________________ Sorry ! The application Instructables (process com.adsk.instructables) has stopped unexpectedly.  Please try again [Force close]    [Report] ______________________________________________________________________ So does anyone get this error as well when playing video clips from the Instructable App?

Posted by spyder2021 5 years ago

favorite connectors?

I was wondering if anyone had any favorites for 1 or 2 wire (electrical) connectors that are easy-to-connect/disconnect with a minimum amount of force. I'm thinking around the 22 AWG range. Thanks!

Posted by sloan2 11 years ago

French paramilitary forces break the Windows ...

.The French administration is slowly replacing Microsoft's products by open sources solutions.It started few years ago, 2005, with OpenOffice, then with Mozilla.And now, the French Gendarmerie (paramilitary forces) plans to replace Windows XP by Unbuntu Linux. are three reasons behind the move [...]. The first is to diversify suppliers and reduce the force's reliance on one company, the second is to give the Gendarmerie mastery of the operating system and the third is cost [...]The move away from licensed products is saving the gendarmerie about seven million euros (10.3 million dollars) a year for all its PCs.The 70,000 desktops of the French Gendarmerie should be 100% Linux by 2013-2014.This is, again, a proof that Linux solutions became mature enough to compete with Microsoft Windows.Dell now sells computers with Linux instead of Windows.OLPC and EEEPC use Linux.Several administrations around the world are seriously planning to move to Linux and Open-Source.Is this is the beginning of a new era ? How many administrations around the world will abandon Microsoft too ?How long before buying a computer with Linux sounds like a serious option for a majority of consumers ?I wonder if Microsoft really feel worried about that ... =o)

Posted by chooseausername 10 years ago

xbox 360 headphones

Is there a way I can wire Ear Force X4 Dolby Digital Wireless headphone receiver to work with earforce x22 wired so I can use the sound processor in it?

Posted by arbiterprime 3 years ago

An Unhealthy Obsession With Magnets

Ever since i observed the attractive/repelling invisible force of the magnet i was interested in this mysterious action at a distance what compels the movement of metal the laws, the principles, wow electromagnetism cool stuff

Posted by eoosen 11 years ago

Anti-gravity Machine concept

This is a concept I came up with for an idea of an anti-gravity machine.  Let me just state for the record... I do not think this will actually work.  However, while I am quite certain this idea should not work... based upon my limited knowledge of science... it would seem like it could work.  Unfortunately I know I am never going to spend the thousands if not millions of dollars to build this concept to find out. The basic premise of the idea is the use of angular momentum to overcome the force of gravity.  Imagine if you will, a gyroscope spinning at such a high velocity that its outward force overcomes the downward force of gravity.  Naturally, one of the big obstacles is generating the speeds necessary to create the velocity such that angular momentum is greater than downward force. What I essentially propose is a spinning ring that is propelled in the same way as a maglev train.  Using Electromagnetic propulsion or EMP to accelerate a ring in a vacuum by the utilization of a flowing electrical current and magnetic fields may in theory generate the speeds necessary for the force to overcome gravity.  Unfortunately, the power to run such a vehicle and the weight to power ratio are significant obstacles. Two of these rings above one another I theorize can create tremendous propulsion if the angles of the rings were changed.  Using hydrolics to change the angle of alignment of these two rings may create incredible forward momentum.  Once more, such a vehicle would not be limited to operation within Earth's atmosphere unlike jet or other propulsion mechanisms.  In fact, it should operate at peak efficiency in a zero gravitational environment. This is all theory... and I'd love to know if it is indeed as crazy as it sounds.

Posted by DarkRubyMoon 8 years ago

Hybrid cars - uphill strategies

I own a hybrid car (Honda Insight 2nd generation - CVT) and I'm happy with the fuel economy (4.3 L/100 Km  --  54,7 MPG),  but I think there is still room for improvement. My house is on top of a hill and when I get home I have to climb steep slopes. The batteries go low and the forced regeneration kicks in. (The car uses the gas engine to recharge the batteries.) When I get home the batteries are almost fully charged. The next trip is, of course, downhill and the high state of charge prevents me from getting the maximum advantage of regenerative braking. (Put in other words: I'm burning gasoline uphill to recharge the batteries that I could charge for free driving downhill...) How could I avoid/reduce forced regeneration? What strategies do you use driving uphill? Thanks

Posted by Fabio M 4 years ago

SRV3 Build

Do any of you guys have built the srv3 by now? Because im trying to build it and its hard because theirs no actual  instructions for the gun, if anybody that has one can maybe have a ibles on it? 

Posted by Element Force 1 year ago

how to make a hunting bow?

Dear: Instructables  Just to let you know I have been having a lot of fun with my current bow. My only complaint is that it is not something you would use for hunting. It barley can shoot arrows at 35 pounds. I was just wondering if someone could point me in the right direction for a hunting bow? I don't know if my bow could be used for hunting or how much force it can shoot at but all I know is that it can't be used for hunting it doesn't have enough force. I'd prefer to make my next bow out of pvc if I can. Thank you. From: Noah

Posted by nschreiber0813 2 years ago

Yet another ZKAR issue.

Here's another issue that I feel needs to be solved on the ZKAR.  Sometimes the pusher forces 2 rounds together side by side in the mag, which causes a jam.  This is caused by expanding mag walls, are there any fixes for this?

Posted by DJ Radio 8 years ago

Improvised Mortar and Pestle

I need to grind some kno3 but i dont have a mortar and pestle or a coffee grinder. is there any way to improvise using household items? by the way, the kno3 is pretty strong stuff, so it will take some force to grind it. any ideas?

Posted by DELETED_DELETED_kruser495 9 years ago


This is a forum for those who want to rant about dishes they were forced to eat, dishes they liked, funny experiences, and that terrible migraine you have from stuffing yourself (I thought you were only supposed to stuff turkey?) Enjoy!

Posted by Constructo Man 10 years ago

new home page is very frustrating

I cant scroll down the page anymore. as i try to scroll down the main page to see whats all there, EVERYTIME the header image changes the page forces me back to the top of the page. this effectivly makes the page unusable.

Posted by sredmond421 5 years ago

Hover Technology

I have an idea for Hover Tech./Hover board. See if you used sound at a high enough decibel, but at a frequency humans and animals couldn't hear, it could work. Because sound is also a force, it can move things. Anyone agree or have some input?

Posted by Kyzyks 8 years ago

Button pusher

I want to build a device that can push a button (such as keyboard, cell phone button, etc) with approximately the same force as a human would once every few seconds automatically. I've done a search, but haven't found a project like this. Has anyone published anything along these lines?

Posted by baggers 11 years ago


Charging for the print book and the classes you are pushing on us is like Microsoft forcing us to download windows 10 and it bricking the screen or the $1500 computer then running a message your equipment does not match and you need to update and now you have ballast to put corner weight in the race car 

Posted by hdrideblue 1 year ago

Steampunk Gets Real

As reported on New Scientist today, the British steam-powered vehicle Inspiration broke the previous land-speed record for steam power, set back in 1906. The fastest of the two runs was 151 mph, set on a dry lake bed at Edwards Air Force Base.

Posted by kelseymh 8 years ago

Persistent Rednecks and Rockets Ad

The Redneck and Rockets ad, which takes up 100% of the page, cannot be dismissed. I PAY FOR A MEMBERSHIP and don't want to be forced to see an ad EVERY SINGLE time I visit a page. If this is the case, refund my membership and let me deal with advertising.

Posted by idomagic 6 years ago


So, some people like wearing and/or collecting hats. Show us your headgear! Here are my favorite hats. The first is an Indiana Jones fedora, the second a NZ made oilskin, and the last is a circa 1989 Soviet Air Force officer's hat. I'm in the market for a leather pilot cap...

Posted by KentsOkay 9 years ago

Best Game Ever?

Does any one else think that Call of Duty 4: Modern Warfare is the best 360 game you've played in a while, possably ever. Gaz, Griggs... Noooo! (you have to have played the game to understand the Griggs thing. They force you to watch, you can't look away.)

Posted by Spl1nt3rC3ll 10 years ago

Shotgun *stalled*

This is my airsoft shotgun. It is quite near completion, however, i'm stuck. I have two m120(?) springs powering this beast. I need to come up with a trigger system that will hold back all of this force, while still having a semi-easy trigger pull. There is a metal screw that needs to be held back once i pump the, well, pump (the screw is pushed back by the pump.) Any input on this would be greatly appreciated. (BTW, i thought about a paint ball gun's trigger, but the only problem with that is that the screw has to lock back too far for this to be a viable option.) Also, the third picture is a shell. It would be filled with approx. 30 bbs and a cotton ball or toilet paper would plug both ends. The bolt has a part that extends through the shell and would force the bbs out.

Posted by Dr meat201 9 years ago

Itunes is stuck?

Apparently my itunes refuses to work for me anymore and I cannot access my 20 gig music collection. It opens for like 5 seconds and then just locks the entire computer up and I have to force it off. Oh yeah and it's a ibook G4 has anyone had any similar problems?

Posted by Punkguyta 10 years ago

Instructables IRC (Much better than Meebo)

After getting fed up with Meebo, and its guests floating in and out, causing disturbances in the force and whatnot, A few other mods, and myself, are trying to educate other members on the benefits and use of the instructables IRC chatroom.Click here to get educated!

Posted by bumpus 9 years ago

Anything that can explode using CocaCola

I heard of using mentos which will force the coke out and also dry ice in a coke bottle. can anyone tell me what can i use to explode using coke (not drugs, cocacola). (homemade stuff only? i know this is a crazy question but i love explosions

Posted by godwin123 11 years ago

What Be Ye War-Cry?

I believe it is a commonly known fact (<--I assume) that most organisms capable of doing so exert some form of cry when exerting force. What cry do you use most often? When lifting? When celebrating? When charging into battle? When slaying that enemy in a video game?

Posted by KentsOkay 10 years ago