Mechanism for pouring exact amount of liquid?

I have a cylindrical container(around .75 liters) that is filled with water. I want to accurately pour a certain amount of water in a cup. How can that be done?? My idea (might be complete fail) : I put a hole at the bottom of the cylinder, and a door mechanism that opens and closes the hole. The door will be controlled by timing. So lets say i want to pour 50ml of water in a cup. Using some physics i can get the time needed for the water to freefall into the cup and i will open and close the door accordingly.  The idea sounds a bit cheesy so I wanted some opinions. Picture is attached. Some comments I would appreciate: 1. Is my door opening and closing mechanism a complete fail? A small motor will turn the pinion which will in turn move the rack horizontally opening and closing the door. Note that I want the door open/close mechanism to be as small as possible.  2.If the drink is not water, lets say orange juice or red bull, will the timing vary considerably? 3. Any ideas how to accomplish this in another way other than timing and opening closing a door? I want minimum complexity, and the amount poured doesn't have to be very exact, lets say within a 10% margin. (This is basically my question in the first 2 lines).  Note: At my disposal i have simple machining methods(lathe, milling, drilling, cutting), but nothing too fancy. I have sufficient knowledge of microcontrollers and electronics. Thanks in advance!! Chris

Asked by Chris414 5 years ago


Hi im new . hello to all.. I need help with a reverse gear box . Answered

I need a reverse gear box for my go kart and I ask if I can modifiy a lower gear case from an out board motor ( from a mercury 20 )? thanks

Asked by mardokk 8 years ago


Long-running clockwork sculpture

The craftsmanship that went into building this clock is really spectacular! Everything was designed by the artist, from the movement to the machining of components.The woodwork is oak and the brass imagery was acid-etched.

Posted by zazenergy 7 years ago


Physics question has me stumped

A large crate sits on a pickup truck which has coefficients of friction mu(s) =0.6 and mu(k) =0.4 . My question is how do I calculate the impact velocity if the truck accelerates (-8.0 m/s^2) and the crate slides forward 1.5 m to impact the back of the truck? Can anyone please walk me through this problem whenever you get the chance? Thank you. 

Posted by GThreep 3 years ago


Alternative clock-Mechanical

I need to build a device for a competition that can measure time acurate to the tenth of a second, but from its starting position it must be no more than 30cm in dimension, but can exceed that once it begins.  Even if you know of something that can do seconds that would be fantastic.  If you have any ideas or places to find plans please do tell.  IT CANNOT USE ELECTRICITY

Posted by danielsb7676 8 years ago



Does anyone have an English copy of Shrodinger's paper "Quantization as an Eigenvalue Problem"? Answered

I've had a terrible time finding it in English. My German in nonexistent. :-)

Asked by Vorenus 7 years ago


Advice on riveting moving joints

Hi guys. I've been prototyping some very basic steampunk mechanisms that I'm preparing an Instructable for, and I'm looking for a bit of advice on how to make the moving joints. The mechanisms are simple, with parts I'm cutting from brass sheet myself. They'll be using joints that I'd like to make reasonably permanent and low profile, yet able to move (elbow joints, for want of a better description). I've not tested it yet, but I've read that putting a piece of paper between the two arms before riveting them (blind/pop rivets) will allow the joint to move once it's fastened together. I was also considering whether it might be advantageous to put a nylon of teflon washer between them before riveting, instead. Any advice on whether this type of moving joint would be any good, if it would last with moderate use, whether it would work at all, and what some possible alternatives might be would be very much appreciated. Thanks in advance!

Posted by graffitiwriter 6 years ago


. Plot the magnitude of the couple M required to hold the system in equilibrium as a function of θ for 0 ≤ θ ≤ 2π

The magnitude of the force P applied to the piston of an engine system during one revolution of crank AB is shown in the figure below. Plot the magnitude of the couple M required to hold the system in equilibrium as a function of θ for 0 ≤ θ ≤ 2π.

Asked by zineb88 4 years ago


How can I make 2 wheels on the same shaft counter rotate?

Hi, I'm looking to take 2 wheels of the same size, placed next to each other on a shaft, and gear them in such a way that they rotate in opposite directions but at the same speed. Any gearing that takes place has to happen right in the center. Does anyone have any ideas as to how to accomplish this in the most efficient way?

Asked by gravityisweak 2 years ago


What size maintenance staff?

At an industial facicilty that cuts and welds polypropylene sheet to make huge tanks for steel mills and other industries, three buildings, 24000 sq. ft fabrication area, 4000 sq. ft for mixed sizes of offices, 5 propane forklifts, 1 mobile crane, 4 overhead cranes, 2 utility trucks, 2 heavy duty pickup trucks, several powertools, several extrusion machines, various rigging lifting and handling apparatus, a 25HP rotary screw compressor and a 10HP dual piston compressor, various shop machines and saws, seveveral pneumatic presses and fusion machines, and tons of other miscellaneous stuff. How many guys do I need to maintain it all?

Asked by DrBrown 6 years ago


Candy Vending machine, how to limit the amount of servos needed?

I'm making some plans for a vending machine that is to be used for dispensing candy in my home.I went for the spiral method (please tell me if there's a better method). I got all the plans laid out and i got most of it working already. The problem is: I want to limit the number of servos this project is using. Servos are expensive and they take precious pins on the arduino i'm using for the project. The question is: I have 9 spirals for candy and i would need 9 servos to turn them and release candy (nom nom). Is there some ingenious way to limit the amount of servos and still be able to rotate all the spirals independently? This is basically what i'm making, just smaller :) http://labs.myrtlestreet.org/wp-content/uploads/2009/07/candy_machine_921kb_cp4d.jpg I edited it to include a little flash file i made of a rail system using 2 servos and an aktuator.

Asked by Eirinn 7 years ago


Ibles Robot In Popular Mechanics

Well I was flipping through my August 2008 issue of Popular mechanics, and what do I spy on page 16? The Ibles Robot! In his green sci fair outfit! No idea what he's doing there, and I intend to email PM about it.

Posted by KentsOkay 9 years ago


Using "Phun" to simulate mechanisms

I'm not an engineer, and don't have access to Autodesk / AutoCAD, so I've been using Phun to simulate mechanical design.It's not strictly valid in an engineering sense, but it works pretty well for roughing out ideas. The polygons were created in Inkscape, then converted to Phun scenes with SVG2Phun. Some objects won't translate (like grouped objects), so it's necessary to simplify (hence the two images from Inkscape.)

Posted by gmoon 9 years ago


Does Any body need a timing light circuit? Answered

I was thinking that i should post one here but thats if anybody actually needs it.

Asked by josh1001 6 years ago


Top 5 April Fools' Day Pranks You Can Build in the Office

Check out the Top 5 April Fools' Day Pranks You Can Build in the Office I put together for Popular Mechanics! Certain holidays seem to have been created for DIY-ers, and April Fools' Day is certainly among them. No store-bought hand buzzer can stand up to a well-built, well-executed homemade prank, so we asked the chief geek from the gonzo builders at instuctables.com to pick his favorites from their new practical joke contest. Once you're suitably inspired by these projects, share your own antics right here to win $200--and enter PM's DIY Rally 2008 (only one day left!)

Posted by ewilhelm 10 years ago


Matlab code for object detection using Webcam?

Hello , I am using Arduino to control a car and i want to make it autonomous by using a webcam to see the object i want and make the car moves to this location i need several things 1) Matlab Code 2)Interface between Matlab and Arduino  3)How to connect between them (software not hardware) I need any tutorial to learn or any instructions to make my project I see many people done this before but unfortunately they   did not mention how to start in this kind of projects  I really really appreciate any help

Asked by mohamed.elseify 5 years ago


Alternative Clock-Mechanical

I need to build a device for a competition that can measure time acurate to the tenth of a second, but from its starting position it must be no more than 30cm in dimension, but can exceed that once it begins.  Even if you know of something that can do seconds that would be fantastic.  If you have any ideas or places to find plans please do tell.  IT CANNOT USE ELECTRICITY

Posted by danielsb7676 8 years ago


Popular Mechanics 2008 DIY Rally

Submissions for the 2008 Popular Mechanics DIY Rally close on April 4, 2008. If you've got something cool, be sure to enter it (and post an Instructable!). Here's the official announcement:Popular Mechanics' race for the best DIY projects of 2008 is on! Can you top a pedal-powered air gun? A self-tending barbecue? A motorcycle that rides on water? Whatever you've been hammering away on in your garage or basement, we want to see it. If it qualifies for the magazine's annual DIY Rally, you and your project will be featured in an upcoming issue. Use this online form to enter, but be sure to do it soon. Submissions must be received by April 4, 2008.Submission formAstute readers will note that the winning entry, shown in front of the loading dock at my old hangout, MITERS, was submitted by Damon, who now works for a Squid Labs spin-out company.

Posted by ewilhelm 10 years ago


Ripped off by Hearst Mazines(SCAM company)

I'm wondering if anyone here has ever subscribed to magazines such as Popular Magazines. Four months ago I subscribed through Hearst Magazines paid by credit card, thinking Popular Magazines is a pretty well recognised magazines. First two months I could put up with thinking there might be some error. Writing to the people in Hearst Magazine only resulted in auto-reply messages. Third month there was one reply with a case i.d.  At first I thought I was getting somewhere. Still, nothing happened. I wrote to them again showing some frustration, I asked whether I will be getting my first issue this November or next November. The reply was: "Thank you for contacting Popular Mechanics. We have extended your subscription so it will continue through the November 2011 issue. Thank you, Popular Mechanics Andrew   Customer's email address: aoandy@yahoo.com Case id: 12214311 " What does that mean? I have written to Consumer Protection. I doubt any action will come soon enough. But I am writing here as a warning to anyone and everyone to beware of this scamming organisation. If you feel the need to rid the world of such people, I encourage you to spread this message. Thank you all. We have received your subscription order. ORDER SUMMARY: Date: 2010-09-06 Term: 36 Issues Amount: $61.00 Ordered by: SF Lin Delivery Address:    S-F Lin     67Soi 57 Lardphrao Rd.    B********,*********** This is an auto-generated email, please do not reply. If any information is incorrect, or if you need to contact customer service for any reason, we ask that you wait at least one week for your order to be processed and your information to appear in our system. Please allow 4-6 weeks for delivery of first issue. Popular Mechanics is a publication of Hearst Magazines Division, Hearst Communications, Inc. ©2010 Hearst Email Privacy • 300 W. 57th Street • New York, NY 10019 Customer Service | Privacy Policy | Give Popular Mechanics as a Gift | Other Magazine Subscriptions  

Posted by macmundi 7 years ago


electronics and mechanics of a cnc machinecan?

So can someone give me a basic rundown of how a cnc machines electronic and mechanical aspects works im just a bit confused and cant seem to find a source to give me information on the subject everyone seems to gloss over it, but if you have a website or pdf or anything that would help thatd be great too thanks in advance!

Asked by zaronas 6 years ago


Oooo, look what I came across today....

I was out and about today, going to local areas of interest, and we stopped at a little shop I hadn't been in for years. In amongst all the old tools, and bits of paraphernalia, were all these magazines (Popular Mechanics, Science and Mechanics, etc.) from the time of my youth. I was THRILLED, and so I started going through them. Well, I would have loved to have taken the whole box of them (about 50 or so) home with me, but at $3 a pop, I decided on just 2. The Popular Mechanics magazine from the year of my birth (not the month, this one was a Jan. issue). and the Science and Mechanics issue is from Aug. 1960. Neither is remarkable in any specific way (excepting the birth year one). At the same shop I also found an original copy of Gimbels Handy Book For Boys. © 1933I am thrilled at this find, not that it is terribly valuable as an investment, the cover - binding is not so good, but at $5, it has a treasure trove of info and tips, very similar to "The Boy Mechanic, yet different too.

Posted by Goodhart 9 years ago


How to secure metal shaft into bearing with larger ID? Answered

A question for mechanical gurus :) I'm building motorized Igus camera slider based on Kokomonstrum design. I have a shaft that's 1/4" OD that needs to go inside bearing block that has bearing with ID of 5/16". I know I need some kind of bushing, but ones I bought at McMaster don't fit bearing opening (even tho they are 5/16 OD). What are my options? Tape wrapped around shaft? Epoxy? Can't think of anything else :(

Asked by bratan 6 years ago


How to make a gumball machine?

Hi all, I thought there would be an instructable on this but it hasn't come up yet....so maybe I'll take this opportunity to initiate a Q&A sort of thing with a project I'm working onI'm trying to make a gumball machine/ dispenser for ordinary sized gumballs and fit hidden inside a large rectangular structure. No coin input required. On ebay I saw someone selling a gumball machine that was vintage and it takes Standard Gumballs, The whole unit was 16x8x2. I thought it was amazing, but was outbid.From most round gumball machines I've seen, the glass just seems to hold all the gumballs in such a way that when the gears turn they push the gumballs up and one dispenses. I just stumbled across this one too: [http://cgi.ebay.ca/ws/eBayISAPI.dll?ViewItem&item=250440283723&fromMakeTrack=trueMaybe these are far too basic questions from someone who never took physics in high school, then didn't take mechanics in art school (kicking myself) but how can I make a gumball machine like the one above, with a rectangular container? We could co create this instructable or anything else like that. Feel free to personally message me about the project.Thanks!

Posted by youhearditherefirst 8 years ago


Of props and guns

Hmm... I'm sure that I posted this before. Anyways, I was planing to make a (non-working) revolver 1:1 scale. I kind of have an idea on how to make it, I just have a problem developing a plan to make a double action trigger and a rotating cylinder with the cylinder popping out of the side with a release button. A picture diagram would really help. Also: I would like to hear suggestions for material, mainly for the handle. I'm kind of new to this sort of thing.

Posted by Ausm 8 years ago


diy shoulder axle/pin/shaft/dowel pin?

I would like to - create a shouldered pin* in order to glue gearwheels** to it - ask you for any advice or link that may hint me towards a solution any ideas are highly appreciated: i already had a look at misumi, conrad, rscomponents, alibaba, ebay, amazon "small parts" … but could not find any suitable solution. * pin's dimensions:                        left                   center                 right                   --------------=================--------------- diameter        1 mm             2.5 mm                1 mm length            2 mm             13 mm                 2 mm **made from delrin & brass. These gearwheels are spinning at a speed of ca. 4000 rounds per minute (a prototype*** worked well with superglued-gearwheels ) ***my prototype: 1mm steel wire surrounded by heat-shrinked tube

Asked by marc_is_curious 3 years ago


My Autodesk Residency

I was an Artist in Residence at Pier 9 from January through March of 2014, just a few months after the facility opened. I completed three projects during my residency, but split some of my projects into several Instructables. Citrus Juice Press with Mortise-and-Tenon Joinery "Tiny Planet" 3D Printed Mechanical Sculpture "The Manhattan Project" Cocktail Machine (Coming Soon!) Here are some things that were wonderful about my Residency: -Vanessa and Noah were extremely supportive as coordinators/facilitators/etc. They worked tirelessly to organize and improve a rapidly growing program filled with newbies like me. Whether it's just bouncing ideas around or getting connected with a person who has a particular skill, they were always willing to take a minute and help out. -Shop staff and Instructables staff were very helpful in navigating the tricky details of the shop, writing and publishing Ibles, etc. I relied heavily on help from Sean, Gabe, Dan, and Martin to help me work with tools in the CNC, Metal, and 3D Printing shops. They were patient and interested in helping me become a skilled operator. -Having access to the tools at Pier 9, particularly the Omax Waterjet and the Objet 3D Printers, allowed me to quickly move from design through prototype to final product. As a mechanical sculptor, I am used to spending months on a single project, waiting days or weeks for waterjet/lasercut parts to ship to me, etc.  -Classes and workshops, both formal and spur-of-the-moment style, gave me the resources to use so many tools that it was sometimes overwhelming (see below), but always awesome. Gabe's weekly software sessions, Audrey's photography tutorial, and of course all the Safety and Basic Use classes in the shop, were excellent ways to gain experience with new tools or learn how to better use familiar ones. -Free, endless coffee. Here are some challenges I faced during my residency: -The open-office style space at the Pier makes it quite difficult to focus (for me at least). Wearing headphones can help, but I also found that doing computer work elsewhere was more efficient. I know that the layout is meant to facilitate community, and it does, but I have found that I have to be vigilant so that my "talking about doing cool stuff" time does not eclipse my "doing cool stuff" time. -CNC tools can do incredible things very quickly, but they are fickle and, especially in the hands of novices, break often. Other times, they are just so popular there is a line to use them. Shop staff do a superb job of keeping the shop running smoothly, but I learned to always head to the Pier with a list of projects to work on, in case the tool I most wanted to use was unavailable. -There is an overstimulation that seems impossible to avoid at the Pier. New ideas come so fast, it becomes hard to pin yourself down to one and begin the nitty gritty work of actually making it happen. It can be quite difficult. -There is some pressure at the Pier, and I imagine it will grow, to use Autodesk software. As much as I would like to gain experience using Inventor and Maya, I decided that I would get more done by sticking with the software I was comfortable with.  -Free, endless coffee. I walked away from my Residency with a host of new skills, a number of new friends and professional colleagues, and a few projects to boot! It was a great time, and I would do it again in a heartbeat. Thanks Pier 9!

Posted by tinkertinker 3 years ago


I am trying to make some simple animatronics for halloween (ie - no programming). Any ideas or links to help? Answered

I am having my first halloween in my first house. My neighbors said they go all out for holidays, and I've always wanted an awesome halloween haunt. My only problem is I've never had any electronic experience past screwing in a light bulb. I don't want to attempt programming dealing with relays or microcontrollers, etc yet. I'm just looking for things that will be fun and basic. Any body know of any ideas to get my props moving without zapping myself?

Asked by lpfan3217 8 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....

Posted by Goodhart 7 years ago


Mechanical timers - wind up mechanism

Can anyone advise what is the maximum length of time the mechanism on a mechanical hand-wind timer can last for (approx range will do) i.e between 60/70 minutes, 3/4 hours.

Asked by MMAM 7 years ago



can i change my 6 spline propellor shaft on my outboard to a 10 spline?

I have a 1978 suzuki dt25 outboard which is running a 6 spline/key way propellor shaft. since a 6 spline propellor is incredibly hard to find these days could i replace that shaft with a 10 spline shaft which is more common? cheers. william horton

Asked by billbobaggens 6 years ago


Why can a function satisfying same boundary conditions as functions Un(x) of a complete set be expanded as ΣCnUn(x)?

This is a question I encountered while reading Introduction to Quantum Theory by Hendrik F. Hameka (Please don't worry, I'm not trying to cheat on my homework, I am just asking out of curiosity). The book states the following:      "It can be shown that a function f(x) that satisfies the same boundary conditions as the functions Un(x) of a complete set can be expanded as f(x) = Σ CnUn(x) ... If we multiply by U*m(x) and integrate, we obtain Um | f > = Cm " This second part is fairly straightforward because ∫ U*m f(x) dx = ∫ U*m Σ CnUn(x) dx and it follows that Um | f > = Cn Σ Um | Un > = Cn Σ δn,m = Cn However, the first part confuses me because I can only justify it when Un(x) = (2π)^(-1/2) e^(inx) (The example of a complete set given in the book, actually) In that case, it can easily be seen that the expression Σ Un | f > Un(x) is just the Fourier Series expansion of f(x) and thus the result is valid for the particular complete set. However this does not explain why this is valid for all complete sets: "how can you prove that this conclusion is valid not only for this particular complete set, but for all complete sets?" is my question. Thank you in advance for answering! Please feel free to post any questions of your own if you need clarification. Also, please be advised that you should not post responses on the order of "you didn't specify an interval of integration, so your question is impossible!" - if you know enough to answer the question, then you will understand why said interval is not specified, etc. Once again, thanks!

Asked by Xellers 8 years ago


Information on mechanical switches for electronic circuits?

Text and photos on mechanical switches for electronic circuits

Asked by 9 years ago


Mechanical wall sculptures

These mechanical sculptures by Brett Dickins are awesome. I'd really love to see his workshop with a bunch of these moving at once. via BoingBoing

Posted by fungus amungus 7 years ago



What Single shot mechanism is the most sturdy and is the easiest to load? Answered

Same as the title, which single shot mechanism is the most sturdy and his th easiest to load? EDIT:This was posted in the knex section for a reason ><

Asked by Soopah Steve 8 years ago


Does A Mechanical Iris's Cam Wheel Size Matter? Answered

I would like to know if a Mechanical Iris's Cam Wheel Size dictates how much the shutters close.  Please and thanks.

Asked by cod289722 6 years ago


Artificial Intelligence VS Mechanical Engineering

This year I'll choose a study, and I'm still hesitating between Artificial Intelligence and Mechanical Engineering. Which one do you think is the best choice, and why?

Posted by merijnvw 8 years ago


Mechanism for mechanical timer

Hello everyone, My wife and I both feed the dog, but we're never sure whether the other's already done it or not.  (the food disappears pretty quickly)  I'd like to build a track with a slider that takes about 10 hours to slide from 'fed' at the top to 'not fed', and make it so that the slider is easy to slide back to the top. What immediately comes to mind is a counter weight escapement mechanism, but I though I'd hit up the brain trust to make sure there wasn't a simpler way to pull this off.  (I could also envision a timer chip hooked to a mechanical release, but I'd prefer to stay wholly mechanical for this one.) Many thanks!

Posted by oldmicah 6 years ago


How to construct a film projector using a geneva mechanism? Answered

I am doing a project of making a geneva mechanism and then employing this mechanism i have to constructing a working model of film projector. First part regarding the making of geneva mechanism is complete but i can not find anything regarding the design and construction of such a projector that uses this mechanism.

Asked by usama164 6 years ago


what is a simple way to make an cooling mechanism?

I want to make a simple cooling mechanism(not talking about a fan here) which is simple to build, as little mechanical(moving) parts as possible, i don't have a huge budget...

Asked by lieuwe 9 years ago


Mechanical pencil basics

If you want  to enjoy life, you should make mechanical pencil guns and launchers. All you need to do is take the mechanical pencil out and add springs however you like and you can make a gun thing.

Posted by XxAwesomexX 8 years ago


Traditional pump car lever mechanism

Does anyone know how the lever mechanism of a traditional pump car work? I'm thinking of building a miniature model but I can't find any design schematics for it. Thank you.

Posted by pinoymale 10 years ago


How do I build a mechanical calculator? Answered

I'm planning to build a mechanical calculator which can add, subtract and multiply.. I cant find any help. Can anybody give me some links where i can be guided better?

Asked by Yashknowsbetter 8 years ago


alternator control mechanism

Im planning for a project on alternator control mechanisms. can anyone provide me relevant ideas about the topic?

Asked by Puranjay Menon 4 years ago



DIY airsoft grenade that isn't a wad of bb's duct taped to a firecracker?

 Okay, so here's what I'm thinking; an aluminum rod with holes in the sides for the bb's, the holes are a little larger than the bb's, and have a styrofoam chunk in each of them to hold the bb's in. Then a hole the size of the CO2 canister in the middle. I haven't worked out the timing mechanism yet, or even started to, but the firing mechanism would be a spring attached to a hammer with a spike on the end of it, pull the pin, hammer hits the co2 canister, boom. Any help/suggestions here?

Asked by iBurn 8 years ago


Does anybody do anything in the Popular Mechanics Group?

Does anybody do anything in this group? 

Posted by gearup500 2 years ago


Strong Egg Timer mechanism?

I want to a mechanism that turns a drum very slowly for a few hours.  It should work just like an egg timer: You wind it up and then it turns slowly. Is there mechanism available that works like this or do I have to built it from scratch?

Asked by uwe999 5 years ago