Refining Gold Using Vinegar (Acetic Acid)?

Though I've never refined gold, I've heard of gold refining using different acids. I've seen people use vinegar and salt to etch pcb boards. I'm wondering if anyone knows how to refine gold using vinegar so that I can remove it from ram sticks etc.

Asked by mykiscool 3 years ago



The outside icon

I think the outside icon should be refined a little. All of the other icons look great but the poor bike is a little strange!

Posted by scraptopower 5 years ago


Algae biofuel oil refining?

I have long been a fan of the idea of renewable energy from algae colonies, but I have yet to find any information on actually refining the oil produced with the algae.  I am well aware of how to remove the oil, however at that point it is just an organic crude.  Is their a process to refine it to a more diesel or gasoline-like state, or is it efficient enough to run an engine on the crude.  I am currently growing a reasonable algae colony and would appreciate assistance in doing something with the algae after it is grown.  

Asked by jj.inc 4 years ago



Best soldering iron? Answered

Can you recommend the more refined soldering iron for someone looking to go deeper from the get go, as not to waste money on cheap stuff

Asked by JohnathonP 5 months ago


This deserves more views

This project deserves more views.hailtothkngbby has taken a cardboard idea of mine and rendered it in shiny, durable aluminium, as well as adding a couple of refinements.Go, see.

Posted by Kiteman 9 years ago



How is bamboo turned into boards and other "flat" products?

I am curious about the process used to turn bamboo stalks into flat boards (such as bamboo flooring and cutting boards). What is the process, how difficult is it to do on your own?

Asked by action_owl 4 years ago


Am I able to refine a search using filters?

Hello,  I would like to find a way to focus my searching requests.  For example, I entered the term 'farm' in the let's make field.  My intention is to find instructables in relationship to real life farms.  What I end up hitting is mostly how to work farms in minecraft.  So I attempted to use the google like filter of "farm -minecraft" but that seems to focus on minecraft projects rather than skip them.  Does the search engine posses a way to help me get to the projects that I am most interested in reading about and not having to flip screen after screen of minecraft farms?Thanks.

Posted by gesamek 1 year ago



How do I make an effects pedal? Distortion, Reverb, any of them?

Basically looking to experiment and make my own things (how else do you refine a sound, ha) and honestly want to get any good starting notes/ steps to take off from.

Asked by xirdnehimij 8 years ago


Electrolosis/ electroplating?

I am interested in recycling computers to recover the valuable metals (gold, silver, mercury etc) and I was wondering if I place a bunch of computer conectors and fingers in a copper sulphate solution and ran electrolosis with a copper electrode, would it selectively transfer the copper, leaving the other metals behind. If so it would reduce the amount of acid needed to refine the gold.

Asked by Tinker Terry 5 years ago


would a instuctable for how to make a paper mache cherry bomb be illegal and if not should I post one?

The main reason been so as I could get help off fellow members to refine the process. I would be using the resulting product for metal detecting for the recovery of buried targets in the goldfields where the ground is too hard to easily dig and on the beach if the target is deep?

Asked by grentes 8 years ago


would it be possible to bulk up gold flake for scrap ? Answered

Would it be possible to bulk up gold leaf/flake of a high purity with a resin/hardener to scrap ? as the jeweller will take a filing to test  would the bulking agent be minimal to detect  because it not being an alloy/metal ? love a bit of knowledge about this before i buy 30 kg of gold flake/leaf ;-P thanks   MAGIXO

Asked by magixo 6 years ago


Any ideas for my manga?

Hi, I am going to write a manga hopefully soon, but I don't have any ideas.  how I'm going to do it is I will make a rough draft with the ideas from all you guys, then, I'll go through the process of refining the story until I have the final copy.  Then, I will start to draw the story.  Please comment.

Posted by nancyjohns 4 years ago


Does anyone think that a Windows Xp Parody made in microsoft power point would be a good idea? Answered

I have been working on a microsoft powerpoint windows parody and i thought it would be an alright idea but i'm just getting someone elses opinion. It's not finished yet but it alright so far. I may make a second to refine it. I will take ideas or resources or opinions on the matter

Asked by pk_excel 8 years ago


More refinement on the commenting system

Would it be possible to have a set of 'tags' that can be assigned to comments on Instructables so that things that are just trying to stir up trouble or are otherwise just attaching to the top comment to get theirs seen noticed? Right now, all you have is "Flag" which is not what I want. I want people to be able to say whatever they want, but I want a way to be able to categorize a comment better... You could tag a comment 'Troll' if all they are trying to do is get people angry. Or 'dangerous' if the comment has obvious dangerous things to it. The point is to get the comments to have a more user-moderated feel to them, rather than what they are now which is anybody can say anything and it's going to be there forever unless it's a really blatant disregard for the rules. Slashdot has a very wonderful system where they let you actually ignore comments from certain people who are clearly trolls and never bring anything useful to the conversation. They also allow you to moderate comments with basic things like, "Insightful" or "Funny" with points that you get semi-regularly by commenting and having your comments moderated positively. Maybe we could have a system like that in place? There are a few people on this site which I never would want to hear from again, due to the very nature of every single comment they have ever said has been--in my eyes--useless and just completely not worth my time to even see. I would also like people who I find as friends to have a different color frame so that I know those are the ones I should read first.

Posted by Spokehedz 7 years ago


how to clean up Nitric acid after using it?

Hi, I used Nitric acid to refine sterling silver. When I put the sterling into the acid it became silver nitrate.Then I used copper to get the silver to come out of solution and it became copper nitrate. what can I do to get the copper nitrate out so I can use the nitric acid again? If that is possible.I need someones help. Robot

Asked by ronny1leg 6 years ago


Portable 3.3v regulator for a 9 volt battery? Answered

I've seen a great deal of portable breadboard PSU's that output 5 volts from a 9 volt battery, and I find these fantastic! However, I was curious...is there any way to refine this futher down to get a steady 3.3 volts? I would like it to be something close to the system that sath02 has made here as it not only better suites my nees, but makes sense to me. Thanks in advance!

Asked by DoctorWoo 5 years ago


How can I automatically trigger a fixed vehicle-mounted still camera to take a photo every (say) 30 minutes?

Is there some system that can automatically trigger a fixed vehicle-mounted still camera to take a photo every (say) 30 minutes so as to produce a sort of travelog of photos? Maybe a crazy idea for an inventor. I would certainly like to try it.Perhaps a refinement would be to be able to adjust the frequency and also to pause the timer if the vehicle is stopped.?

Asked by macajm 8 years ago


Instructable on electroplated circuit boards?

I managed to plate a copper trace onto piece of acryllic today, to test out a process for easily and cheaply making (and possibly editing/repairing) custom PCBs. The adhesion appears to be good for surface preparation used so far, and a nice thick track has formed. So, would it be worth uploading an instructable once the process has been refined a little (or enough to make simple boards properly)? Any questions, feedback or comments would be appreciated.

Posted by The Skinnerz 6 years ago


What is the oil content of Eurasian Milfoil?

I would like to use the oil extracted from Milfoil to produce biodiesel. I would like to know what the oil content, if any, is of milfoil. I think it is great because it is unwanted and there is a lake near me that has two giant machines whose sole job is to cut milfoil. I could collect it, dry it, press it, and refine it for next to nothing. If you have seen anything like this let me know.

Asked by jack.h 9 years ago


Spring Loaded Arm Blade without Drawer Slide

Can anyone help me with instructions on how to do a spring loaded hidden arm blade without using a drawer slide? Looking for something a bit more refined. Also, I am looking not for it to use as is, but to spring out the blade and then be able to grasp it with hand and remove it to use. So I guess, more of a spring loaded holder for a knife, because really, trying to use an arm blade like this to do any real damage in an actual fight, would be difficult. Thanks

Posted by jscott14 5 years ago


Instructables Halloween Build Night - 10/15

Greetings ghouls and goblins! We are proud to announce another upcoming Instructables Build Night at the reMake Lounge this Thursday at 6:30 PM. This build night is themed around perfecting your Halloween costume, so bring what it is you are planning on wearing! If you don't have an idea yet, come and be inspired. There will be supplies and tools on hand to help you refine your awesome costume. Meet, mingle, share and learn. The reMake Lounge is located @The Crocker Galleria50 Post St. Suite 9San Francisco, CA(ground level near the Sutter entrance)

Posted by randofo 8 years ago


Color changing LED faucet?

I'm looking to make one of those faucets that changes color with the temperature of the water coming out of it. I already have a preliminary circuit using a thermistor, an LM311 comparator and a couple LED's. Just wondering if anyone had any tips of how to refine or whatever. Also hitting a roadblock on how to power this, as I want to make it entirely analog (no microcontrollers, just op amps and the like) and I want it to be fitted to an actual faucet nozzle. If it is fitted to a nozzle, space is very limited and batteries are really not desired. I was thinking along the lines of a mini waterwheel or something that uses kinetic energy from the water.

Asked by jarredpickles87 6 years ago


Electronic water level gauge for well

I have a 32m deep, 95cm diameter well, that is covered with two heavy concrete covers. The water depth is about 20m down from the surface. I cannot easily access the well to sound the depth or visually check the water level. I would like to build an electronic water level gauge that will tell me the amount of water in the well. I can then regulate watering accordingly. It was suggested to me that I use a washing machine pressure transducer but I have no idea of the circuit required. A refined solution would send data to my PC !!!! I have 240v AC supply to the well pump. Any ideas? Steve

Posted by SteveG31530 9 years ago


Microbial instructable on the cheap

I'm interested in this instructable on isolating plastic degrading bacteria but the author doesn't appear to be active at the moment.I have no experience in this area. Any ideas on if/how could perform a valid experiment on the cheap? The only two prohibitively expensive items seem to be an autoclave (I'm assuming I could use a microwave or pressure cooker) and the Hass Broth: The solution used to feed the bacteria containing all their required elements except carbon, which they get from the plastic.Would it still be a viable experiment if I gave the microbes a banana peel or something and hope they're still hungry for plastic? Also can I get away with using a cheap milligram scale?I know this isn't a typical type of question but any help would be appreciated. Thanks!

Asked by Refinity 2 months ago



Copperplating with non-pure-copper?

Hi! I plan on some experiments with a modified method i saw here for PCB-plating with copper to make the holes conductive. Now the question: What if my metal is not 100% pure but has some impurities in it? Does it still only "transfer" the copper and leaves the impurities as slag behind? I think it should be this way, since a similar approach gets used in refining metals to a very high purity; but i am unsure... Lets say i do: Follow the basic recipe (with smaller ammounts!) @ http://www.thinktink.com/stack/volumes/voliii/consumbl/cplatmix.htm and use copper sulfide. I think the trick now is that only copper-ions get disolved in the copper sulfide and nothing else. Those ions become plated to the other pole and thus i get purest copper plated to it?

Posted by Orngrimm 5 years ago


what would it take to make a co2 laser from scratch?

I think I have the basic concept, you take a full mirror and a one sided mirror, put them between a tube, pump in 10% co2 gas 5% argon or something inert, charge it with a neon transformer and a few welder's sticks for the anode and cathode respectively, then most of what comes out the one sided mirror should be laser emissions. I know I'm missing something though... any suggestions? I'm not worried about refining the beam into something that could: cut metal, make holes, be a nuisance to my neighbors, I just want a multi-watt laser in my barn that I could use to start my wood stove at the press of a comically big button.

Asked by waldosan 7 years ago


How can i use silver from x ray films to eletroplate a soldering iron tip?

That's it: i have a ton of old/useless x-ray films and a bare copper iron tip. I usually clean the x ray films with sodium chloride (at 2%, from bleach) to use the pvc sheets to make stencils. Once i left the resulting solution to air dry. It took something like a week for the 25cc of liquid to evaporate and left some crusty, green matter - which, i'm pretty sure,had silver in it. The questions are: what is that solution? Can it be used in eletroplating as-is or need to be refined? If yes, how? Put your brains to work, my friends! A silver-coated soldering iron tip is something of our common interest, i believe.

Asked by vinacarv 8 years ago


A cake recipe containing no dairy products, no eggs, no gluten, and no nuts?

I'm having a hard time finding a recipe for a cake to bake for my class. I really want to celebrate that we finally finished the portfolios for admission to our next semester, but I don't want to bring a cake only some can eat (or only some can eat with good conscience). Problem is, we have a nut allergic, a gluten and cassein intolerant, a lactose intolerant, a vegan, and someone who has to avoid refined sugar. I can't find any vegan egg substitutes, or xanthan gum or anything like that, and all the gluten-free flours I've found reguire some kind of gluten replacement. I CAN however get all kinds of flour, like soy, rice, chickpeas, tapioca etc. but I don't know which to use or how. AND I have a sugar replacement that should work as a direct 1:1 replacement in baking good of all kinds. So... Anyone has any recipes, or advises about substitutes? :)

Asked by ELF 7 years ago


large autonomous robot brain and drive system ideas? Answered

So I have been looking at several different instructables and articles online and I'm really interested in trying to build a large robot of my own, similar to but updated and maybe more refined than the robot butler instructable here. Right now though I'm trying to figure out what I would run it off of (computer, micro controller etc) and how to interface the motors with this control system. Wheelchair motors seem to be a great option for the motors and wheels so what sorts of options do I have to interface that with a computer or how could I interface it with just an arduino or something similar? The robot butler instructable used phidgets and several relays to control everything but I'm wondering if there is a simpler or better way. I want to be able to control the two wheelchair motors and wheels as a base as wells as probably several servo motors for the robot's arms and potentially a webcam and some speakers. Any help anyone can give on ways to do this sort of thing or guidance on how to even begin is greatly appreciated. Thanks! 

Asked by dstech 3 years ago


Does Chromesteel disolve during copper-electrlysis with Coppersulfate?

Hi I want to refine some copper and change it to copper-dust-particles by means of copper-electrolsis in a bath of disolved coppersulfate. Since my copper is in smaller bits id like to have some sort of etallic basket to hold the scraps. I think i would like to go with a chromesteel-mesh i connect to the power. The mesh/basket contains my scrap-copper and the anode-sludge can pass thru the basket... The basket (anode) and the copper-cathode are connected to the powersupply. Now my question: I think the chromesteel shouldnt get disolved as long as i dont crank up the voltage too high or let it run without sacrificial copper at the cathode. If i would do that, it would start to split the water used in the solution and produce H and O. Bad. Also would slowly eat away the metals too. Bad^2 But as long as i have copper to be disolved at the cathode, it shouldnt do anything to my chrome-steel-basket, right? Thanks for inputs from someone who knows it better than i do :)

Posted by Orngrimm 4 years ago


Soldering Survey

Hi there. We’re Solder Otter, a team of recent engineering graduates from the University of Waterloo in Canada that is redesigning the soldering iron so soldering electronics can be safer and simpler. You may have seen the survey we posted back in 2013 when we first started working on Solder Otter. Since then, we’ve built prototypes, won pitch competitions, and learned so much about makers and soldering. We’ve received a lot of positive feedback, so we’re pushing forward with the project beyond graduation. We have another survey. It’s similar to our last survey, but this one is designed to help us refine our prototype into the best soldering iron for you. We’re reaching out to makers and hobbyists across several forums because we want to learn about your soldering experiences, preferences, and needs. We're also considering designing with children in mind, so if you have any input in that regard, we'd love to hear that too. If you can spare 10 minutes to fill out our survey (link below), we would really appreciate your input. Thank you! If you have any questions or comments feel free to reply to this post or send us an email at info@solderotter.com. Link to survey: http://goo.gl/forms/Uep9Qd0GiM

Posted by solderotter 2 years ago


Back-room inventors' contest.

From the Popular Science website: World-changing devices don't need to come from big labs funded with big money. Sometimes radical technological innovations roll, whir, or fly out of basements and garages. Do you know you've invented something that's poised to disrupt a market, or have you toiled building prototype after prototype in your home workshop to prove your idea works? Whether you're a professional engineer working on a self-funded side project, a hobbyist who has launched a successful crowdfunding campaign to refine your gadget, or an obsessive teenager who's built a sellable product in your bedroom, please tell us about it! Enter the seventh annual Popular Science Invention Awards. We’re looking for game-changing products developed by passionate, independent inventors -- not academic or corporate R&D labs. Popular Science editors will pick 10 entries that best represent the spirit of homegrown ingenuity and solve real-world problems in a practical, innovative way. Then, in our May 2013 issue, seven million readers will get the first look at the winners. This is right up your street, Instructablers, because you have to make a thing, that you can show working, and you are not allowed to enter if you have a commercial or university research department backing you up. Link for more details.

Posted by Kiteman 5 years ago


Astronomer's Assistant

My next submission for the Create Scholarship is an outdoor one. And a night. I'm an astronomy student by education and I have had the opportunity to teach both students and the general public. One of the most frustrating aspects of showing folks where particular objects or constellations are located. Just pointing at it doesn't cut it. Unless you get real intimate in their personal space, they have no idea what you are pointing at. Informing them that, "Betelgeuse is the reddish-orange star right there" quickly results in, "they have colors?" I've used a green laser at star parties in the past with much satisfaction however, a shivering hand or a need for both hands for demonstration quickly makes it a hinderance. I would like to build a robot that continuously points at a selected object in the sky and follows it through the sky. The software would convert right ascension and declination and factor in date and time to provide the robot with the proper azimuth (compass direction) and altitude (angle above horizon) to aim with. The Roomba is great at rotating, so I would refine it and add a stepper motor with encoders for the laser arm. It would also have a tilt sensor to compensate for uneven ground. A red-lcd (for happy dilated pupils) display of all the pertinent information as well as object name would also be displayed. The hardware requirements are minimal as the database for popular objects would fit on most any memory stick. A remote control (wireless PDA or the like) for easy navigation and manual override would be also be included. I think most any amateur astronomer or educator would find such a robotic assistant indispensable. I for one can't wait to build it!

Posted by SolamenteDoug 10 years ago


"Compound" parabolic solar cooker. Suggest a way forward!

I have a new instructable (Late December) about making your own templates with technical drawing tools. You can basically make the compound parabolic dish to catch 1,2,3 or 4 hours worth of sunlight. I have made a 3 hour dish and it worked great as a solar cooker. I have not however solved the math for exactly how the light reflects to the cooking pot. It is pretty good but not yet optimized. Would anyone like to join in? I can either make the instructable a collaboration or you can post your refinements on appropedia on their wiki.I do not want this project to lie stillborn like the pulser pump did for 20 years but how to engage people? Thats the real problem. Thank you Brian White 21st dec 2008 and it has worked really well. I would like others to try it so I made a template. I chalklined across the dome at 15 degrees intervals, Put clear plastic over it, marked the lines on the plastic and cut the plastic. Basically all you have to do is cut a piece of ply to be like the template, use it to cut out 12 mylar segments and then tape them together. (I do not know how you will hold this umbrella open, thats up to you!)My dimension lines were vertical on the paper, it just looks angled from the picture. Figures (all in inches) are 0.5,15.5,17,31,7,12,2.5 and 3/4 just in case you cannot read them. Its a funny looking template but I think it is good enough of an approximation for this. I devided the 2 long curves into straight lines.Should be fine. I also have a pdf file containing results, etc as the second image file. Just click on it and it should open. (solar for group.pdf) Brian Brian

Posted by gaiatechnician 9 years ago


Feedback Can someone test my Instructable "software for solar reflector design"?

I have an instructable about designing better reflectors for solar cookers. (Better than parabolic dishes). Basically you can design your own dish, and compare it to the parabolic dish and other shapes with the software. On step 1 there is a zipped folder for download. It contains an art of illusion scenefile. Art of illusion is the modeling and animation software I used. It is easier to learn than its competitors and it is free. The folder also contains a html file for almost automatic tabulating of your results and comparison with other reflector shapes. I have "starter" jpg images for when you create series of 10 images for comparison. I hope to put in a help html file too but thats all for now. To test it, you do need to download art of illusion too. I know this type of project can be a bit of a pain but with feedback, I can refine it. And where else do you have free tools to test solar reflectors? https://www.instructables.com/id/Use_software_to_design_a_better_solar_cooker/I hope that this will grow. A guy in Finland has already done a rudimentary "sun engine" that will do the shadows from a day as an extension to this project! That could be used to design passive solar houses and to site vegetable and fruit gardens in the best spots. (Depending on the seasons and day length, shadow patterns from trees and houses are very different). This is not something you can imagine just from surveying a site! Anyway, hopefully I will get some input.The instructable has grown and changed a lot as I have improved the scenefile. There are certainly parts that need trimming now. Hopefully I get round to it in the next couple of days. Brian

Posted by gaiatechnician 9 years ago


PLANS Dragon Tiger Chu Ko Nu Repeating Crossbow

This is a set of complete plans for a Dragon or Tiger "Chu ko nu." To be purchased on Etsy as a downloadable set of files: https://www.etsy.com/listing/272230762/dragon-or-tiger-chu-ko-nu-plans?ga_order=most_relevant&ga_search_type=all&ga_view_type=gallery&ga_search_query=repeating crossbow&ref=sr_gallery_1    It is an ancient Chinese mechanical repeating crossbow. The plans include the printable dragon and tiger patterns that you glue on to your wood pieces, then cut out and wood-burn the beautiful pattern. Then you can paint or stain it how you want to. It is a crossbow and a sculpture, like a display woodworking item that is also fun to shoot! Assembly instructions here: https://www.youtube.com/watch?v=SCGHTDqgWHU I have been fascinated by this type of crossbow since my early teen years and have been building and experimenting with them for more than 10 years. This set of plans displays my most current and refined iteration. It is very fun to make this and see your own fine work come together, then see and feel the mechanism function smoothly. Very satisfying. To build this you will need some small hardwood boards as will be listed on the cover page of the plans (this wood is available at hardware stores ex: Lowes). You will also need white glue, two wood screws, and one small nail. The plans are delivered to you as a digital download in a zip file with all the pages in it. Tools needed include: Saw (prefer a band saw with scrolling blade, but a thin bladed hand saw can work), Sand paper, Round wood file, Clamps for gluing, Drill with selection of bits, Wood burning tool.

Posted by Jaycub 2 years ago


Solar deathray smelting? Answered

So Im not sure of the capabilities of the fresnal lens in terms of maximum temperature but I've seen them melt brass. I was thinking with a solar death ray on top and a charcoal fire on bottom that I could get temperatures to melt steel. I have drawn a rough sketch of the overall Idea I really need someone to further refine this idea into a working schematic that I can create when I do I'll document it all and relay the results on here to help others recreate it. Now This setup will be behind my greenhouse on the corner of my property on the side that would be hidden from the sun, however if the base pivots on an axel I'm thinking of using, then it will be able to catch the sun from all the points when it's most useful. In that I'll also have the fresnal lens on a pivot bar to help get it on my focusing lens which will be a plastic and water style parabolic lens my only concern is that if I can't turn that lens will it hinder my project entirely or will it be fine, plus I'm not sure about focal point on this kind of lens. On the sides of the frame I'll build for the fresnal lens I'll have strings attached for turning on the bar and I'll be able to lock it in place to keep from fires around my smelter.. Hopefully! Overall dimensions may appear small in the drawing but the fresnal lens should be at about I'm guessing at roughly 25 feet off the ground, or roughly 7.5 meters and the focal point in the middle will be found and adjusted to the fresnal in terms of height. I think it was roughly 1 meter so I'm not sure entirely I would love some feed back on this idea as I plan to make a smelter with it to complete my in progress foundry I'm building in my shed.

Asked by Kaelidian 5 years ago


SMRI

Yay, taking forever to do stuff! Haven't really accomplished anything big since the summer. Believe me, I keep fiddling around with my K'nex every now and then but things just don't quite work out and then I'll lose patience. Anyway, my current project is based on something I originally made just for fun as a refinement to a previous weapon I made just for fun. It was made to look realistic but otherwise was completely nonfunctional. I'm naming it the SMRI mostly just to be pronounced "samurai" but I'll figure out an acronym for it. Some of the features were a removable front sight, top and side rails designed for real/airsoft rail accessories and a bottom rail for K'nex accessories, and then a fake charging handle that locked back when the magazine is out of the weapon. It would then be triggered when inserting a fresh mag. The idea is that if it were a real weapon, I'd like a feature where on the last shot, the bolt is not only held open, but it automatically closes when a fresh magazine is in place. The overall style of the weapon probably resembles some real weapons, though unintentionally. My goal was to avoid the AK and AR-15 platform styles. So I designed the gun completely convinced I'd never make it shoot because it was too aesthetic-based. My main problem was designing the front of the gun to be open enough to allow a bullet to fly through it. Well, I modified the front sight set up just a bit to give enough space for a bullet to comfortably fly through. Overall I want to keep the design of the gun very similar, though I'll have to improve the stock, figure out the best way to incorporate a firing mechanism, and probably add a magazine lock. I was very pleased with the look of it, so I'm really hoping I can make this one shoot. I'll keep you posted. Of course classes, work, and social situations keep me occupied so I don't know how long it might take me.

Posted by TheDunkis 4 years ago


Ingenuity Needed: Cutting records with quality.

It's lengthy, sorry, but it's worth it! Let me preference this with, I know this topic has surfaced before. Most of the forums and pages are filled with broken links to information, sold out products, and are all around rather worthless to return to. I'm posting this in hopes it stays a useful reference point. For  a few years now, I have been looking at cutting disks playable on a record player. I found an 'ible a while ago (the original one I bookmarked has been removed) that showed how to make an needle assembly. It demonstrated making a record engraver by putting a staple through the center of a speaker. This tool kind-of worked, but had some quality issues, as well as speed. When you push to engrave the audio, you slow the table. Less pressure, less quality, more quality, less speed. The other issue I ran in to was keeping the groove tight enough to hold more than 20 seconds. I'd like to construct a device that will cut CDs in to records with a good bit of accuracy, and give a second life to mis-burned disks (as well as some ancient unsupported linux disks...driver disks...early Windows builds...AOL disks...you get the idea) Putting the proper spindle on a properly geared motor should resolve the speed issue on cutting. Having the cutting arm on a servo should resolve the length issue, my only quandary is quality. ~~~~~ So, the point of this post, and the thing I'd like to have some input on is, How do I construct a cutting needle, that will offer some quality. I should refine that a little more - something that is going to transfer bass well. ~~~~~ I was not eager to puncture a speaker, so I modified the original plans. I placed the staple in a layer of plastic, and glued this to the speaker. The plastic gathered more of the vibration, and funneled it to the cutting head more accurately. This did work relatively well, but I feel with a few extra minds, this process can be made better. If this project ever sees the light of day, I'll make an 'ible, and cite any assistance. -Spence

Posted by mr monoply33 5 years ago


Sitar bridge mod (for floating-tailpiece guitars) idea

The characteristic sound of a sitar is created by a bridge that gently rolls away from the strings; this creates a buzzing timbre which quickly depletes higher overtones in the string's vibration (I could draw some diagrams if anyone's interested). This type of bridge is something I'd like to make as a removable modification for a guitar. My guitar has a "floating tailpiece" as I believe it's called, in which the strings pass beyond the bridge to the tailpiece. The segment of the strings below the bridge have no part in tone generation, and so could have an object attached to them (a piece of wood wedged between the strings, perhaps) without affecting the guitar's tone. If some object (the "clamp") were attached to the strings immediately below the bridge, another object (the "sitar bridge") could be affixed to it some minuscule distance from the vibrating portion of the strings. The sitar bridge would not make contact with the strings at rest, and so would not be a node of vibration (and not affect the strings' pitch), but when the strings are played, their vibrations would make them rattle against the sitar bridge - much like the bridge of an actual sitar. So how about it? I think it'd be an interesting and relatively simple mod that could be made to be removable and not destructive at all to the actual guitar. I unfortunately have no idea how to refine the concept any further than what's written, so I leave it up to any willing DIY-ers. It all makes sense in my head, but I may have accidentally left out some important particulars of this kind of mod, so please ask any questions you have. Because this mod relies on the strings below the bridge in a floating tailpiece guitar, I don't think it would work on most solid-bodied guitars, but if anyone can come up with a similar mod for the more common bridge type, be my guest. Also remember that the "clamp" below the bridge cannot rely on the tensile strength of the strings, as not only are they not terribly strong, their tension needs to remain intact so that the guitar can be played in tune.

Posted by Impasse 8 years ago


Gearbox Sharpener for knex

NOTE THIS IS A MODIFIED VERSION OF THE ONE I MADE LOOKING AT THE VIDEO ON YOUTUBE! IT WAS INTENDED AS A GEAR BOX BUT I ALSO TURNED IT INTO A SHARPENER AND A CHAIN SAW!!! It is hand cranked so... yeahThis is a knex sharpener tool that uses gear ratios to spin the rod at high speeds faster then a large yellow gear to small blue or grey gear ratio which is a 1/5 rotation ratio, for this gearbox though you achieve a magnificent 1/32 rotation ratio. One spin of the cog or yellow gear or starting gear whatever = end rotationWhen spinning at high speeds use a knife or sand paper to refine the sharpness of your rod to a dangerous needle if needed, or you just want to clean up a bad cut job from a pencil sharpener or knife cutter? This gearbox will smoothen out our refine your knex rod... NOTE THIS CAN SHARPEN THE ROD SO SHARP THAT IT IS DEADLY... NEVER EVER FIRE THIS ROD EVER TRUST ME NEVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER EVER SHOOT THE SHARPENED ROD AT YOURSELF OR SOMEONE OR ON AN UNRELIABLE KNEX GUN OR A STUPID KNEX GUN ETC THIS THING CAN MAKE YOUR RODS DEADLY TRUST ME IT HAPPENED TO ME BEFORE!!Anyway enjoy!

Posted by mrbox 9 years ago


Tips to computer shopping? How to avoid laptops with crap WXGA TN screens online? Good computer companies? Answered

I'm shopping around for some decent truelife® display, Acer CineCrystal Technology®, etc) which are meaningless. I have had enough experience with 1366x768 to know that it a really poor resolution, and often indicates also the quality of the screen in general. Want is something with at least 1600x900, preferably 1080p, with a proper color display that is not 18,000K, with a viewing angle better than an old back projection TV. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Also, what are some good computer companies? What experience do you have with HP, Compaq, Dell, ASUS, Toshiba, Acer, Alienware, Samsung, etc? My father is pretty HP oriented, and doesn't like Dell too much, mentioning all the problems they had with them at the place he used to work. I have not had the best experiences with HP (probably because of Vista though), but no experience with any other company other than samsung for phones and tablets. My old tried and faithful low-end Compaq computer (HP owned I believe) has held up very well over it's 7 years, and is still in use to this day, even though the WXGA screen has faded and yellowed over time. The HHD and RAM have been upgraded, and it has been running ubuntu for many years now, too. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ I found this deal at costco for $700, it seems really nice and I cannot find anything bad about it. It has a decent display (saw a very simalar model in costco), 5th gen core i7, 16GB DDR3 RAM, 1TB HHD, and some good peripherals build in.  http://www.costco.com/Dell-Inspiron-15-5000-Series-Touchscreen-Laptop-%7C-Intel-Core-i7-%7C-1080p-%7C-Backlit-Keyboard.product.100155985.html?catalogId=10701&keyword=978495&langId=-1&storeId=10301&refine=

Asked by -max- 3 years ago


A New, Global Oil Quandary: Costly Fuel Means Costly Calories - Peak cooking oil?

The interconnectedness of the world can sometime be striking. I noticed yesterday that Safeway, a west coast grocery store chain, has converted it trucks to biodiesel. Due to increased fuel-demand for things that were previously only considered foodstuffs, the cooking oils carried by the biodiesel-fueled trucks were probably significantly more expensive. In Malaysia, this has even idled some plants design to refine oils into biodiesel:Here on Malaysia's eastern shore, a series of 45-foot-high green and gray storage tanks connect to a labyrinth of yellow and silver pipes. The gleaming new refinery has the capacity to turn 116,000 tons a year of palm oil into 110,000 tons of a fuel called biodiesel, as well as valuable byproducts like glycerin. Mission Biofuels, an Australian company, finished the refinery last month and is working on an even larger factory next door at the base of a jungle hillside.But prices have spiked so much that the company cannot cover all its costs and has idled the finished refinery while looking for a new strategy, such as asking a biodiesel buyer to pay a price linked to palm oil costs, and someday switching from palm oil to jatropha, a roadside weed.from the NYT article A New, Global Oil Quandary: Costly Fuel Means Costly CaloriesAnd there's more: as more and more baked goods eliminate trans-fats, those fats are often replaced with palm oil, so the pastries carried by the biodiesel-fueled trucks are themselves consuming more edible oil. While this will increase the price to make and ship a snack cake in the US, it has much greater effect elsewhere. Since people in the developing world get such a large percentage of their calories from cooking oil, increased prices have caused riots:No category of food prices has risen as quickly this winter as so-called edible oils -- with sometimes tragic results. When a Carrefour store in Chongqing, China, announced a limited-time cooking oil promotion in November, a stampede of would-be buyers left 3 people dead and 31 injured.

Posted by ewilhelm 10 years ago


Kala Art Institute Residency Program and Classes

Kala Art Institute is a great resource for artists offering residency programs and workshops. RESIDENCY PROGRAMS Artists in need of space and equipment for work in printmaking, photography, or digital media are encouraged to apply to Kala's residency program in one of two ways. The Artist-in-Residence Program provides accepted artists with 24-hour access to Kala’s Print Studio and Electronic Media Center. Established in 1974, Kala’s Artist-in-Residence program is geared towards providing short- and long-term communal studio space at low monthly rates to both emerging and established artists. The program has steadily grown to reach its current annual population of approximately seventy-five artists from the Bay Area and beyond. The Fellowship Award, an international competition, annually grants nine artists a cash award, unlimited access to Kala’s facilities for up to six months, and a culminating show in the Kala Gallery, through a highly competitive jurying process. The Fellowship Award is geared towards supporting artists in completing specific projects or bodies of work that would benefit from Kala's specialized equipment. Many Fellowship winners transition to the Artist-in-Residence program at the conclusion of their Fellowship period in order to continue their work at Kala. CLASSES Kala offers some of the best printmaking and digital media classes in the Bay Area. Located in Berkeley, every year Kala offers the community close to one hundred classes in a wide range of techniques, utilizing the exceptional equipment available in our printmaking studio and electronic media center. The small, hands-on classes foster creative exchange with instructors and fellow students, and all of our instructors are exhibiting artists. We offer numerous classes combining digital and traditional printmaking in different ways. Choose a class that explores a new interest, or refines previous experience. Both beginners and advanced professional artists will find classes at appropriate skill levels, with detailed class descriptions, in Kala’s annual course catalog and on our website. The website has the most up-to-date class information. Private classes and tutoring sessions in many subjects are also available. Below is a link to our 2012 class calender: http://www.kala.org/class/class.html Carrie Hott Program Coordinator, Classes & Artist Residencies carrie@kala.org tel: 510-549-2977 ext. 303

Posted by carriekala 6 years ago


Lost larynx to cancer, now use electronic voice, battery powered. Feel it could be improved - refine electronics?

After losing my larynx to cancer last year, i now use an "electro larynx" (http://www.griffinlab.com/Products/TruTone-Electrolarynx.html) a great device which translates the vibrations my mouth makes when i "speak" with a rubber tube (the exact same as the one my dentist uses to extract excess saliva) in my mouth. The vibrations are transmitted somehow to a vibrating rubber disc inside a handheld device. There are a few other bits too technical for me to understand and describe, but the end result is an electrical voice a bit like Stephen Hawking's. The machine has a plastic disc built into the lid, held in place by a rubber gasket round the edge, which is made to be pressed against the underneath of the chin or the upper neck. When the laryngectomee speaks,  the vibrations of the throat cause the disc to vibrate, which in turn oscillates a small plastic rod underneath the centre of the disc. This rod runs through the centre of a rubber disc, which is vibrating at high speed because the laryngectomee also presses a button when (s)he speaks, causing it to do so. The vibrations somehow pick up the voice vibrations and turn it into electronic speech. Underneath the rubber disc is a some sort of coil of copper wire almost the full diameter of the machine, and there are 2 pieces of wire soldered into place , too. I don't have a clue about electronics or really anything, so i'm hoping someone out there can make sense of this mumbo jumbo. I'm sure that having a look at the website will help. As I said, normally the device is pressed under the chin, but my neck and chin are rock hard from having loads of surgery, so they don't vibrate - the clever people came up with the solution for people like me: a thick rubber cap fits over the top of the device with a hole through the middle, 5mm maybe. into that is inserted the piece of dentist tube i mentioned earlier. this somehow does the trick, and once more i have the miracle of speech! Now, as I said, this machine is amazing, and certainly beats having to write everything down. trouble is, it has a volume control wheel which is so difficult to get into the right spot, it goes from way too loud to almost inaudible. Now, having seen some of the stuff you guys come up with on here, and the apparently relative simplicity of the machine, i was wondering if anyone could come up with a solution to my quandry....Yours, speechless, Dave.

Asked by DavidK75 1 year ago