Newtons Cradle

Is there anyway anyone knows how to build like a robot kind of thing that with a push of a button moves your newtons cradle and if possible can you make it do a range of tricks?? It would be awesome if i could Looking Forward to responses Thanks!

Topic by unknownusername2702 6 years ago  |  last reply 6 years ago

theory of water rocket?

Question by ainmiey 7 years ago  |  last reply 7 years ago

What are the possible defects that makes a newton's cradle function ineffectively?

I have made a newton's cradle but it didn't function well. I made use of 5 billiard balls, nylon string and wooden base. What suggestions can you make for my newton's cradle to work effectively? Thank you. 

Question by akiira 7 years ago  |  last reply 7 years ago

Do you think it would be possible to build a Newtons cradle with K'nex? Answered

I need your opinion on something. Do you think it would be possible to build a knex Newtons cradle

Question by daredevil499 6 years ago  |  last reply 6 years ago

How does one go about making a reflecting telescope, like Newton's?

What supplies do you need, as well?

Question by shanghai_breezes 9 years ago  |  last reply 9 years ago

Hoax? A task not only for high-schoolers...

       Well, exept for being quite a fun thing to watch, it also should work as a great Physics problem for someone like me (or a bit younger)-studying all sorts of Mechanics and Newton's Laws to work on... The task is to estimate the acceleration the motorcycle should have to do it, and whether it's significantly larger than the one stated in some technical data (there is the motorcycle model somewhere in the video's name).        If you have a go on it and are a) school-aged and b) not sure you are right, PM me. If you simply want to share your results and/or opinion, write here (but try not to put any solution-I mean formulas). In case the video doesn't work

Topic by gruffalo child 8 years ago  |  last reply 8 years ago

For a high school physics lab, my group needs to make a roller coaster out of foam pipe insulation. Answered

The coaster must use Newton's laws of motion. The coaster has to have at least three hills, though the first hill cannot be more than 1 metre high off of the surface it is upon. Does anyone have any ideas?

Question by 27723773 9 years ago  |  last reply 8 years ago

physics mini potato spud gun homework help

Im a grade 11 n i need to write an essay about mini spud gun, but i dun reli understand the physics theory behind it? i search it thr the internet n is now more confused? which one(s) of these is it involved with?>> Projectile Motion Newton's 1st Law of Motion: Inertia Newtons 2nd Law of Force and Acceleration Newton's 3rd Law of Motioin: Action and Reaction Momentum Energy he Boyle Law or the Kinetic Theory of Gases?? why? thanks so much! im not askin like for ppl to do my hw, i juz wanted to know which one of those is a potato gun involved wif.thanks!

Topic by babyduck 11 years ago  |  last reply 9 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!

Topic by schumi23 6 years ago  |  last reply 6 years ago

how can i get a pdf of an ible' without premium?

I'm trying to get the pdf to this ible': i'm in 6th grade and want to present this as my physics final project showing newton's laws and fluid dynamics. can anyone help?

Question by brunodiaz20 4 years ago  |  last reply 4 years ago

Lost in translation

This is just plain funny. website basically takes any inputted english phrase and translates it back and forth through 5 languages using babelfish. The results are often peculiar, if not downright stupid.Some examples:I'm a little tea pot, short and stout.translates toThey are a small POTENTIOMETER, short circuits and a beer of malzes of the tea.a cookie is just a cookie, but fig newtons are fruit and cake.translates tobiskuit has expert of biskuit, but Newton von Fig is fruit and hardens.When the moon hits your eye like a big pizza pie, that's amore.translates toIf the moon fixes its eye like a great vector of Fleischpie of the vector of Pizzapie, is the lover.And my personal favourite so far:I think therefore I amtranslates to:Task that is therefore

Topic by whatsisface 10 years ago  |  last reply 10 years ago

Autogyro construction tips, please!!!

Hey i would like to get some tips on my autogyro which i plan to build...    a) Rotor shape & size    b) Engine power (and power source) and engine propellor shape & size    c) Materials to be used in construction (durable, cheap)    d) Approximate size P.S. I weigh around 345 Newtons...

Question by hqdiyexplorer 6 years ago  |  last reply 4 years ago

High school senior project: something I can construct and donate to the physics department any suggestions?

I want to build a demonstration unit that would be useful for the physics teachers.  It has to be fairly challenging to construct, but not impossible or particularly costly.

Question by danielsb7676 7 years ago  |  last reply 7 years ago

What is the strength of the other charge?

I need help with solving this problem in physics class. I know Coulombs equation F= k(q1q2)/r^2 The force between two charges is 2 newtons. The distance between the charges is 2 x 10 ^ -4 meters. If one of the charges is 3 x 10 ^ -6 C, What is the strength of the other charge?

Question by Baseball24_7 9 years ago  |  last reply 9 years ago

Is the Newman Roller frames good small time production?

I am working for a small NGO in South East Asia and looking to work out out screen tension problem problem.  Is the Newton Roller frames too high end for a small time production.  we don't have much money so it would be an investment.

Question by trbdavis 5 years ago  |  last reply 5 years ago

Gravity Lamp Calculations

Http:// some people might recognize this little invention a while ago.  Well I recently wanted to make one after a freak snow storm rocked central pennsylvania (didn't have power for 2 days, it sucked balls).  But, after doing the math, his claims seem impossible.  Someone check the math for me: Facts of the Gravity lamp (with data in favor of the lamp_: output: 600 lumens weight falling: 50 pounds distance falling: 58 inches (in reality it's a bit shorter, but i'm just putting everything in favor) for ease of calculation and in favor of the lamp, assuming 100% efficiency. lasts for 4 hours calculations: 600 lumens = 7542 candellas = 7542000 mcd the highest efficient LEDs i could find output 120,000mcd at 20mA (0.02 amps) with a drop of 3.2 volts 7542000mcd/120000mcd = 63 LEDs 1 LED = 3.2 volts * 0.02 amps = 0.064 watts 63 LEDs = 4 watts 50 pounds = 22.68 kg on earth: the force of the weight is 22.68*9.8 = 222.264 newtons 58 inches = 1.47 meters 1 joule = 1 watt * 1 second = 1 newton * 1 meter 222.264 newtons * 1.47 meters = 326.73 joules 326.73 joules / 4 watts = 81 seconds, NOT 4 hours looking back at it, I think i messed up the calculations at earth's gravity, because that part is just totally wrong :P.  I'm not far enough into my physics class to know how to properly calculate that, could someone else?

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

Is free energy using two DC Motors is real or fake? Answered

I have recently seen the free energy using two DC motors.After watching it.I had interest in making that.At the same time, one question has raised in my mind.That is according to the newton law ,energy can neither be created nor destroyed or it can transform from one form to another.According to that free energy seems to me as fake.Any one explain me, is it real or fake?

Question by Rajkumar2506 1 year ago  |  last reply 1 year ago

slow drying art paint varnish? Answered

Can any artist help me find an art paint varnish (clear, matt)  that has a longer drying time? I have nothing to compare with but I'm thinking of ways to mix luminous powder for watches. I really have no idea about varnishes in general so any pointers or websites will be helpful. I need the mix to stay wet and workable for at least 15 to 30 minutes. I am looking at Winsor & Newton varnishes. Any other suggestions and options would greatly help me.

Question by phillyj 7 years ago  |  last reply 7 years ago

what should I do with 20 1-inch diameter steel balls? Answered

My brother recently gave me 20 1 inch diameter steel balls that he was trying to use to cool down coffee without watering it down (in hindsight, aluminum has a much higher heat density, but that's beside the point). I've had them laying around for a while now, and apart from a big newton's cradle or maybe a huge marble machine, I can't think of anything to do with them. ideas?

Question by codongolev 6 years ago  |  last reply 6 years ago

I am looking for a sensor that measures "pressure" but I don't know what to look for.

I have an idea, nothing revolutionary, but it would perfectly solve a problem that I have in my woodworking shop. I need to be able to tighten a very small toothpick-sized piece of wood in a small meral vice, to a very specific level of "squeeze", and then release the vice, and repeat that exact "level of squeeze" over and over. Can someone point me in the right direction of what these "pressure measuring devices" might be called? Ideally I could use this pressure gauge (sensor) in tandem with a small display and an Arduino, Raspberry pie, or some other logic device that can interpret the output from the pressure sensor and send that output to the little display.Thanks for your help guys!

Question by Dolmetscher007 6 months ago  |  last reply 6 months ago

TechShop's $60M Expansion Plans - coming to a city near you?

This announcement is posted on behalf of Jim Newton, founder of TechShop. September 23, 2013 I have some very exciting news to share with you about the TechShop community and our aggressive expansion plans. Today, the "Jumpstart Our Business Startups Act", also known as the JOBS Act, became law in the United States.  The JOBS Act allows a small company to advertise that it is seeking to raise money through the sale of securities.  Before the JOBS Act, it had been illegal for companies to advertise the offering of securities, and the law restricting that advertising had been in place for 80 years!  That restriction tied the hands of small companies and made it very difficult or even impossible for them to legally attract funding. The JOBS Act, which is a bipartisan law overwhelmingly passed by the Senate and the House and signed into law by President Obama, became law today.  It will be invaluable to start-up companies because it will make it easier for them to seek investment, and will lead to the creation of many new companies and many new jobs. Today, in concert with the JOBS Act becoming law, TechShop has launched an aggressive campaign to raise up to $60 million in funding through the sale of TechShop stock in amounts of $25,000 or more, and through the acceptance of loans of $25,000 or more from individuals.  These funds will be used to build and support new local TechShop locations. Here is a link to the official press release about TechShop's $60 million crowd-funding campaign: When I opened the first TechShop in Menlo Park CA back in 2006, it was only possible to crowd-fund the money we needed because it was legal to advertise our fundraising efforts in the state of California.  California is one of only two states in the United States that allows such advertising...the other is the State of Texas. It was only because we were allowed to advertise that we were able to reach out to our community and ask individual people to loan us $25,000 each.  We crowd-funded TechShop San Francisco and TechShop San Jose the same way, raising about $2.5 million for each of those locations in a matter of weeks. Before the JOBS Act, TechShop has crowd-funded almost $10 million so far to open our existing locations, but we had to do it either within California, or through direct communication with potential investors and lenders.  It was difficult to do this because we could not advertise outside of California, so our tried-and-true method of crowd-sourced fundraising from our community was not scalable outside of the state.  This has limited our expansion. Now, because of the JOBS Act, we can pursue funding from individuals across the country and fulfill our mission to provide every person in every community with access to TechShop's tools, resources and information.  This will allow us to drive the restoration of American manufacturing, help to create new companies and new jobs, and empower even more people to be makers! Here are the next cities in which we would love to build TechShop locations: Baltimore MD Boston MA Cedar Valley IA Chandler AZ (opening Nov 2013) Chicago IL Grand Rapids MI Los Angeles CA Menlo Park CA (moving to a new location) New York City NY Pittsburgh PA Portland OR Seattle WA St. Louis MO Washington DC (in Arlington VA) If your city is not listed above, here's the most exciting part:  As part of our $60 million fundraising campaign, we have set up a way on our web site for people to vote to determine which community the next TechShop will be located! For more information about how individuals, companies, institutions, and governments can invest or become lenders in TechShop, and how they can vote for their hometown to be the next to have a new TechShop location, please visit our investment page. Please help us spread the word so we can open new locations in the communities that want, and need, TechShop the most. Sincerely, Jim Newton Founder and Chairman, TechShop, Inc.

Topic by mikeasaurus 5 years ago  |  last reply 5 years ago


I need to know how i can make a extact scienctific calculaion of a air gun velocity based on wind speed, requirements so i can even know the laws and regulations of a exact air gun,bb gun,pellet gun,spring gun,and  airsoft guns #1 it must be extact as science #2 show your equation #3 include inperail units and metric OF BOTH  MUZZLE VECOLITY AND MUZZLE ENERGY while keeping it brief of one of only inperial,one only metric and one with a mixture of both or instead of number 3 you can include with just any unit as of that exact unit type for example kilograms and kilograms force,pounds force and foot pounds,kilogram force to joules be sure it inlcude units of joules,foot pounds,newtons, #4 include the wind speed and what the air gun velcoity of the bullet based on wieght and inlcude the amount per each amount of weight and per each amount of wind speed  I KNOW  IT IS  A BIG ASK HOWVER I NEED TO KNOW THE VELOCITY AND FIREPOWER THEN  I CAN EVEN CHECK THE LAWS

Question by 35Timmy 7 years ago  |  last reply 7 years ago

Practicality of ion propulsion?

I've been trying to design a compact propulsion system and have considered ruling out liquid fuel chemical engines due to bulkiness (the fuels are surprisingly heavy, go figure). I've read about ion propulsion and its use in spacecraft because of its high efficiency, at least in a vacuum. However, in such cases the thrusters are rather large and provide a relatively small amount of thrust, usually less than one newton per tonne. Now I'm certainly no rocket scientist and know little about the efficiency of thrust, but to me that doesn't exactly seem remotely powerful, especially considering there are roughly 4.5 N to every pound. Anyway, regardless of the exact fundamentals involved, I have a limited amount of space here so I'll keep it brief. What I would like to know is if a small ion thruster could be made that can reasonably lift a ~40lb weight a few inches off the ground. I've seen compact ion thrusters built by amateurs, so I know they can be built in small sizes, but no clear demonstration of their power has been shown. I need to know if what I'm asking can be done, and if so, how. And please, for the love of all that is holy, I want serious answers only.

Question by TibbyD 5 years ago  |  last reply 5 years ago

Boiling a fluid to make a inverse water wheel?

Ok, how about this; Submerge a waterwheel type structure with cups facing downwards on one side. Under the cups you have some kind of heating element. The fluid is methanol or some other low boiling fluid. A very small amount of heat from the element will produce bubbles, which rise and are caught in the cups, the wheel turns and can generate electricity or whatever. I'm using this principle in another application, but thought it could be quite an efficient means of generating electricity from heat. If the meths is sitting at forty something degrees and boils around 50, it shouldn't take hardly any energy to tip it over. And since you're effectively generating force from gravity (the weight of the fluid on the other side of the wheel) you're kind of getting ten times your force back. ie producing one litre of bubbles will give you 9.8 Newtons of force (for water, 8ish for meths). So (excuse my dodgy maths) 125 litres of bubbles in an hour would give you 1 kiloWatt hour? One cola bottle per minute, doesn't sound very much and that much energy could easily be produced through concentrated solar. Slight risk of explosion... How efficient do you think it would be, overall?

Topic by SolarFlower_org 10 years ago  |  last reply 9 years ago

Get a Jump Start on Your Project at TechShop Menlo Park This Saturday

If you have a project in mind that you want to make, but you're not sure how to get started, the folks at TechShop invite you to come to the TechShop Project Kickoff and BBQ on Saturday, October 4 from 10 AM to 5 PM at TechShop Menlo Park and get expert help.A panel of expert makers (including TechShop staff, TechShop Instructors, and TechShop's founder Jim Newton) will field your questions, offer advice, and help get you moving in the direction of success with your project, no matter how big or small.This event is free and open to everyone who has a project they want to build, and you don't need to be a TechShop member to attend. Just bring your project ideas and your thinking cap.TechShop is a membership-based DIY workshop that gives you access to tools and equipment, wide-open workspace, expert instruction, and a vibrant community of makers so you can build the things you have always wanted to make.TechShop Menlo Park Web Site:

Topic by TechShopJim 10 years ago  |  last reply 7 years ago

Spring-loaded cannon

My friend and I are considering building a spring loaded cannon. The idea right now is to have a pvc pipe for the cannon chamber, and pvc pipes flanking it to hold springs in parallel. A cross-bar will go through all 3 pipes through slits cut long ways in the pipe. The springs will be attached to some point forward in the flanking pipes and to the cross bar, which will be used to pull the springs back and, once released, will launch the dart/ball in the center tube. My research so far - the spring rates of springs loaded in parallel are additive. With 5x 10-in*lb springs, we can produce 667 newtons of force when pulled back 3 inches (springs in question are 5.5 in long) . That will produce an acceleration of 303 m*s^2 on a 1 lb (2.2 kg) albeit for only a fraction of a second.;=industrial&qid;=1257718057&sr;=1-1 These are the springs we're looking at. We'll need to use an even number of springs, so either 4 or 6 (or 8 or 10). So, what do you guys think? Practical? Will we be able to get any distance? Any suggestions? A ROUGH picture is shown below. === are spring tubes, | are handles, and left arrows indicate direction in which springs will be stretched, and the right arrow is a dart flying out of the center launch tube. <----| ===== XXXXXXXXX     ------> ===== <----|

Topic by chs9 9 years ago  |  last reply 9 years ago

Come to the TechShop Orlando Community Meet-Up Party Saturday Night (2/23/08)!

Where Do You Make YOUR Instructables? Make Them at TechShop Orlando!If you haven't heard about TechShop yet, TechShop is an open workshop space that provides its members with access to many tools and machines, and a place that they can just hang out and work on their projects. TechShop also offers lots of short, inexpensive classes on all the tools and equipment to members and non-members. Most importantly, TechShop is a full-time community for Makers.TechShop is currently in operation in Menlo Park, California, and is opening 9 locations, including one in Orlando, Florida, this summer. TechShop's founder Jim Newton and TechShop Orlando partner Robin Lopez invite all Orlando area Makers to come to the TechShop Orlando Community Meet-Up Party on Saturday, February 23 from 7 to 10 PM. You'll have the chance to talk about what you want to see at the Orlando TechShop facility, and find out what their plans are during an open Q/A session. Pizza and soft drinks will be provided by TechShop, and there will be a no-host bar.If you can attend, TechShop asks that you RSVP at the TechShop Orlando Web Site at: you have friends, relatives or know of clubs or groups that you think would like to know about TechShop Orlando, please invite them to come to this event by forwarding this message to them along with the RSVP link. All Orlando Makers are welcome!TechShop Orlando - http://orlando.techshop.wsCommunity Meet-Up Party Information - HQœ -

Topic by TechShop 11 years ago  |  last reply 8 years ago

New kind of contest launching January 24th

Starting this week, we will be running a new kind of mini-contest similar to the wonderful Weekly Challenges being run by mikeasaurus, scoochmaroo, and randofo. These new contests won't be too far out of the ordinary, but they're different enough I felt compelled to provide a heads-up to you loyal readers. Allow me to answer your imagined questions. What are these new contests called? Academic Challenges. What's the difference between these and a Weekly Challenge? The main difference is, um, academic. Project submissions should be usable by a teacher. I will include a list of the relevant standards for the subject matter, so pick one and make a hands-on project for it. Not too hard. We just need the answers to be useful in the classroom.  You can also submit a Guide. As long as the projects within the guide are all related to the topic of the Academic Challenge, that is. Just make sure every project is clearly tied to the academic standards we're looking for. (That'll put the majority of the work on hunting for good projects and writing good intros. Perfect for contestants who are too busy to make, but not too busy to search.) How long do these last? Two weeks. Or more, if two weeks isn't enough time to get some awesome and useful projects. But the first one will be two weeks, and the term of the contest will be clearly indicated on the contest page. What's the point of an Academic Challenge? To help build projects that teachers can use in demos or for hands-on projects with their classes. Well, that's cool I guess. Now what? Get your apples out, because the first Academic Challenge will be about Newtonian physics. And it starts tomorrow. Don't have any ideas? Was your last experience with Newtons primarily fig-based? Get hunting now for cool projects that demonstrate Isaac's big ideas and make a GUIDE. (I really want some guides, guys. Make guides.)

Topic by wilgubeast 7 years ago  |  last reply 7 years ago

Knex gun projectile propulsion ideas

So I'm looking for stuff beyond what has already been done. Pin guns are everywhere, slingshots are yet again pretty common, hammer guns have been made but don't have the same performance as the others, and then you have "rail"guns which have a shuttle that works similarly to a pin, but can have the track extended. We really need some new ideas here. I specifically do for my current gun as I have a wicked cool loading mech, but absolutely no propulsion mech and limited space to fit it in. Anyone have ideas that are completely different? If you suggest the following, because they have been done before, please try and make a mech that makes it more innovative still: deconstruction magazine multi band ratchet (multi shot slingshot: if anyone comes up with a magazine to replace of bands, kudos! Plz post dat ***!) a hammer gun that gets some f-ing range for once (we're talking 35-40+ ft without needing glued parts) Some ideas I've come up with that I haven't seen (and haven't made either...) are: enclosed trebuchet (probably spelt wrong, but google wanted me to say "Bucharest" so I'm just going to leave it as is) (an arm picks up a round at the back of it's arc, then comes forward like a hammer but doesn't rely on impact for round firing but acceleration instead) newton's compound cradle: a pin comes forward and hits a shuttle out of a catch, with that shuttle being pulled forward by bands so you have the impact acceleration, then even more from the other bands switchback: a pin comes towards the user, hits the bottom of a lever (hammer) which comes forward and hits the round If you come up with others, or mechs for these, please comment with your idea! Thanks, and let the innovation continue :)

Topic by Dreamwave 3 years ago  |  last reply 3 years ago

UPDATED: I am having difficulties deciding which book to pick from AMAZON

I will get a list of the ones I am considering at the moment soon, and would like suggestions from you all too. Ok, here is my list; I want to pick one of these, OR if someone has a better suggestion....let me hear it:   Backyard Ballistics: Build Potato Cannons, Paper Match Rockets, Cincinnati Fire Kites, Tennis Ball Mortars, and More Dynamite Devices by William Gurstelle Whoosh Boom Splat: The Garage Warrior's Guide to Building Projectile Shooters by William Gurstelle Adventures from the Technology Underground: Catapults, Pulsejets, Rail Guns, Flamethrowers, Tesla Coils, Air Cannons, and the Garage Warriors Who Love Them by William Gurstelle MAKE: Electronics: Learning Through Discovery [Paperback] Charles Platt Getting Started with Arduino (Make: Projects) by Massimo Banzi Practical Arduino: Cool Projects for Open Source Hardware (Technology in Action) by Jonathan Oxer 30 Arduino Projects for the Evil Genius [Paperback] Simon Monk 51 High-Tech Practical Jokes for the Evil Genius by Brad Graham Mechatronics for the Evil Genius: 25 Build-it-Yourself Projects by Newton Braga 123 Robotics Experiments for the Evil Genius (TAB Robotics) by Myke Predko 22 Radio and Receiver Projects for the Evil Genius by Thomas Petruzzellis The Geeks' Guide to World Domination: Be Afraid, Beautiful People [Paperback] Garth Sundem Illustrated Guide to Home Chemistry Experiments: All Lab, No Lecture (DIY Science) by Robert Bruce Thompson Chemical Magic by Leonard A. Ford The Best of Make (Make 75 Projects from the pages of MAKE) by Mark Frauenfelder Theo Gray's Mad Science: Experiments You Can Do At Home - But Probably Shouldn't by Theodore Gray BTW:  I have the one pictured, and actually am not pleased with this particular one.  Which is why I am being cautious....

Topic by Goodhart 8 years ago  |  last reply 8 years ago

Need Help extending range of wireless keyboard and mouse =(? Answered

I have a Microsoft wireless desktop keyboard and mouse combo that i use very frequently. the problem is the range isn't so great.  Im talking maybe 6-8 INCHES if im lucky. i do not know why this is, but it was a gift from my girlfriend so i cant just go out and buy another one that is Bluetooth. ;) i have my computer hooked up to my TV via a 12 gauge high speed hdmi cable. (computer sits about 10-12 feet away give or take.)  i mostly use the keyboard and mouse for internet but she loves to use it to play games.  the problem is its gotten very annoying to have to pull the usb cable as close as possible (maybe an 8' cord?) to be able to do anything with the computer.  you'll notice in the 2nd and 3rd images below the "receiver" for the keyboard and mouse. USB powered.  i have brand new Alkaline batteries in both the KB and MS and no change, for those who thought i wasn't thinking lol :) i tried to take apart the receiver and solder on a radio antenna but got no luck. the only thing that happened was no the keyboard and mouse had to be 6-8 inches from the antenna,  MY Question is, Is there a way to Easily build an RF amplifier, or to somehow tweak the board into increasing range.  im at a loss, i thought that if you add a larger antenna, you would gain DB's, like Newtons 3rd Law or something.  maybe im wrong, but if anyone has any input whatsoever, please feel free to comment or message me.  ive tried everything from taping it to the wall or the ceiling, turning it over and even keeping the plastic off, tried a different computer and still no luck, if anyone knows of a way to build an RF amplifier for a 26-28 MHz Range i would love you forever, and i will make an instructable on how to do this for all wireless keyboards and mice that are RF and not Bluetooth.

Question by Kold 7 years ago  |  last reply 7 years ago

TechShop Menlo Park Open House -- Saturday May 31, 2008 10 AM to 5 PM

Jim Newton at TechShop wants to let you and the other people in the SF bay area maker community know that they're having an Open House at TechShop Menlo Park on Saturday, May 31st from 10 AM to 5 PM, and everyone is invited.NEW TOOLS AND EQUIPMENTYou'll be able to check out all the tools, machines and workspace and see how TechShop can help you build all those projects you've always wanted to make. They have a bunch of new tools, including the brand-new 45-watt Epilog Helix laser cutter with 18 x 24 bed and a rotary attachment for etching bottles and cylindrical objects (now they have two of these Epilog Helix 45 Laser Cutters), 4 brand new computers packed full of 2D and 3D design software including SolidWorks (CAD), a plastics vacuum forming station, and a super easy-to-use computer-controlled ShopBot CNC router that can cut out and carve any piece of plywood or solid wood or plastic up to 4 x 8 feet!BRING YOUR PROJECTSPlease feel free to bring your projects to the Open House to show off...completed or not. It will be fun for everyone to see what you're been working on.THE DETAILS o TechShop Open House, Saturday, May 31, 2008, 10 AM to 5 PM o TechShop, 120 Independence Dr, Menlo Park, CA 94025 (Near Marsh Road and 101) o Guided Tours Will Be Given Throughout the Day o BBQ and Pot Luck -- Please Bring Your Favorite Main Dish, Side Dish or Dessert o Tell Your Family and Friends, and Bring Them With You o Kids Are Welcome Too! o Lots of Parking, All Free o No Need to RSVP...Just Come On By!Event details are available on the TechShop Events Page TechShop Events Page.SECURE YOUR TECHSHOP MEMBERSHIP SLOT WHILE YOU STILL CANTechShop 1-month, 6-month, and 1-Year memberships are available. May 31st -- the day of the TechShop Open House -- is the very last day to take advantage of our special membership pricing...membership prices will go up on June 1st. With over 160 memberships sold in just the last 3 weeks, we are quickly approaching our membership cap of 500 members. Buy your membership online right now or at the Open money, and make sure you reserve your membership slot and don't end up on the waiting list!We all look forward to seeing you at the Open House on May 31st! TechShop120 Independence DrMenlo Park, CA 94025(800) 640-1975[]

Topic by TechShopJim 10 years ago

Physics puzzle games- Auditorium, World of Goo and Crayon Physics

I really like puzzle games. I've played two that are really addictive and beautifully made, and found another that looks great.AuditoriumAuditorium has a free on line demo. I've played through the levels a few times. The full game hasn't been published yet.The screen has a stream of light particles flowing into it. You have one, or more, buttons that will affect the path of the particles: like one that bends the light stream to the right, or one that pulls it into a vortex. You move the buttons around to steer the stream into boxes that are scattered around the screen. There are many particles in the stream, and by careful placement of the buttons, you can split them into different paths. When you hit the boxes with light particles a new group of instruments join a symphony you hear. The goal is to get all of the instruments playing.Some levels have areas that will change the color of the light particles as they pass. Some of the music boxes are different colors, and you will have to route the light particles through the color changer before you send them it into the box. Try it out, the free online demo will make it very clear. I didn't even look at the directions. It's easy to find your way as you go. I love a game like that.PlayAuditorium.comWorld of GooIn World of Goo, you have to stick living gooey balls together to make lattice and build some kind of structure (tower, bridge, rope, ...) that allows the gooey balls to reach the end of a pipe that sucks them up. The Gooey structures are not stiff. If you don't build your structure carefully it will bend and can collapse under its own weight. It is a 2D game with a comic book style to the graphics. There is also a level designer and an online community where you can share new levels. I haven't experimented with these yet - I'm still working through the levels that came with the game.There is a downloadable demo for both PC and Mac. There is also a WII version for sale.It is drawn and designed beautifully. Totally addictive.2dboy.comCrayon PhysicsI haven't played this yet but it looks really great.The graphics look like they were drawn by a 5 year old with a box of crayons. When you get to a level, it presents a drawn scene with a star and a ball (it's actually an apple. Must be a tribute to Newton) somewhere in it. You have to draw some kind of mechanism, or ramp, or some objects, or... As you are drawing, the objects develop mass.Everything you draw then reacts with gravity. You have to harness the momentum you get from everything dropping to the ground in order to push, throw, drop or guide the ball so it hits the star.Look at the video it is self explanatory.

Topic by SFHandyman 10 years ago  |  last reply 10 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 :)

Topic by Sharir1701 4 years ago  |  last reply 4 years ago

Graffiti artists replicate The Matrix on win $15,000 Universal Laser Cutter!

Instructables and Universal Laser are happy to announce that the incredibly creative Instructable, How to Enter the Ghetto Matrix (DIY Bullet Time) has won the Grand Prize in the 2008 and Universal Laser Cutter Contest: a 40-watt VersaLaser laser cutter valued at over $15,000!Grand Prize Winner How to Enter the Ghetto Matrix (DIY Bullet Time) How to Enter the Ghetto Matrix (DIY Bullet Time) provides an extremely detailed Instructables tutorial on how to build a cheap, portable special-effects rig to create "bullet-time" animations--a technique, popularized in The Matrix movies, where the audience's point-of-view moves around the scene at normal speed while the action on screen is slowed down."We want to inspire great ideas and provide skills, tools, and shared know-how," Instructables CEO Eric Wilhelm explained. "This project represents exactly what we're trying to achieve with Instructables."The DIY Bullet Time Instructable was created and documented by the Graffiti Research Lab, an open-source urban art and communication collective supported by the Free Art & Technology Lab, a Brooklyn-based non-profit research lab creating work at the intersection of popular culture and the public domain."This will be the cornerstone of our new lab space," said GRL member fi5e. "A whole crew of creative people are really excited to put this thing to use! Thanks for helping us bring the VersaLaser to Brooklyn."The winner was chosen by votes from Instructables users and our panel of expert judges, who reviewed the 14 finalists drawn from a pool of over 600 entries. Congratulations to fi5e and everyone at the GRL - we know you'll really put the VersaLaser to work, and can't wait to see what great things you make! First Prize(in alphabetical order) Autonomous Foosball Table Blu-Ray Laser Phaser! Build a Greenland Kayak Build a Wind Harp! Build yourself a portable home - a mongolian yurt Extreme Business Cards Giant Fresnel Lens Deathray How I built a carbon bike frame at home (and a bamboo frame too) How to Make a TRON Style Lamp: The MADYLIGHT How to build a sit down driving arcade cabinet Laser cutter, start slicing stuff for under 50 dollars Laser Image Projector The Spiral Data Tato -- A Curiously Complex Origami CD Case Second Prize The authors of these Instructables win a robot t-shirt and a laser-etched plaque. Listed in alphabetical order. 30 minute USB microscope The Ambience Enhancer Autonomous, Wirelessly Controlled Hovercraft Conductive Glue And Conductive Thread: Make an LED Display and Fabric Circuit That Rolls Up. Cool Wave Ring Dollar Store Parabolic Mic Handcut inlay A Home Power Plant - Wind Power Generator Revised How to Make a Color-Changing Lighted Faux Fur Scarf How to make a pair of Angel Wings How to Make an OAWR (Obstacle Avoiding Walking Robot) Make DIY Vanilla Extract "Quicksilver" Retro-Future Scooter from appliances and scrap metal Solid Wood Digital Clock The Stirling Engine, absorb energy from candles, coffee, and more! Squishy Breast Stress Relief Toy TiggerBot II Robot Tube Amp Rebuild (and Mod) U-Disp - The Digg (tm) display (Open Source)Wooden Gear Clock Expert JudgesTo help us judge, we assembled an amazing team of expert designers, engineers, hackers, journalists, scientists, technologists, and other really smart people. They spent hours examining each of the finalists Instructables and helping us make a decision. We'd like to send a huge "Thank You" to each of our incredible judges. We couldn't have done it without you.Violet Blue (author, blogger, podcaster, columnist, and SRL vet)Gareth Branwyn (Contributing Editor, MAKE Magazine)Zoz Brooks (Host, of the upcoming TV Show Prototype This)Joe Brown (Editor, Wired Magazine)Colin Bulthaup (CTO of Potenco, co-founder Squid Labs) David Calkins (Co-founder of RoboGames) Julia Cosgrove (Deputy Editor, ReadyMade Magazine)Chris Csikszentmihalyi (Professor at the MIT Media Lab, Computing Culture Group)Simone Davalos (Co-founder of RoboGames) Lenore Edman (Evil Mad Scientist Laboratories)Dan Goldwater (Founder of monkeylectric, co-founder Squid Labs)Saul Griffith (President of Makani Power, co-founder Squid Labs, MacArthur Fellow)Duncan Haberly (Instructables)Matthew Hancher (NASA Researcher in the Intelligent Systems Division)Brian Lam (Editor, Gizmodo)Ed Lewis (Instructables)Jeffrey McGrew (Designer, Because We Can)Chuck Messer (Tackle Design, The Open Prosthetics Project, host of Discovery's Smash Lab)Megan Miller (Editor, PopSci)Jim Newton (Founder of TechShop)Quinn Norton (Journalist)Windell Oskay (Evil Mad Scientist Laboratories)David Pescovitz (BoingBoing, Institute for the Future, MAKE Magazine)Cloude Porteus (Instructables)Randy Sarafan (Instructables, Eyebeam Resident)Peter Semmelhack (Founder of Buglabs)Tyghe Trimble (News Editor, Discover Magazine)Noah Weinstein (Instructables)Eric Wilhelm (CEO of Instructables, co-founder Squid Labs)Dan Woods (Associate Publisher, MAKE Magazine) For the full information on how the winners were chosen, click here.

Topic by ewilhelm 11 years ago  |  last reply 9 years ago