rock tumbler

their should be an instructable on how to make a rock tumbler or do rock tumbler stuff (mabye a rock tumbler week or something, just a sugestion)

Topic by snipegoat 12 years ago  |  last reply 7 years ago


Coin Tumblers?

Anyone ever made a home made coin tumbler? Store bought tumblers are pricey, would like to be able to wash/clean all my old coin finds that I get when metal detecting.

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


Rock Tumbler Update

Ok for every one who saw my question if I should post my rock tumbler made out of k'nex. It will probely be posted in the next month or so because my life got REALLY busy and I did not have any time to post the instructions. It will be one just as I find out the best water/sand ratio for the slury. 

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


Rock Tumbler Ideas

Hello, first off, thanks for taking the time to read my post.Second, I'm brainstorming ideas to make a dirt cheap rock tumbler, for polishing collected stones and maybe even making jewelry out of them. There are a few sites out there with instructions on making rock tumblers and other equipment. Some being:HereAnd hereThe design seems to basically be a rotating horizontal plastic or rubber cylinder, set on two evenly spinning axises. I was thinking of using 4" PVC pipe as the tumbling barrel, and maybe 1" PVC for the axises. One of my first questions is, will a large desktop fan be (roughly) powerful enough to turn the 4" barrel at 50-100 rpm? Keep in mind these are plans for a dirt cheap rock tumbler, so I really don't want to spend much on these parts. Any other suggestions for motors?And, does anyone have any plans that they have made, or even constructed tumblers?Any tips, additions, etc. to my plans?Thanks for reading my post :)

Topic by Doom_Goat 11 years ago  |  last reply 25 days ago


How do I make a rock tumbler? Perhaps not from scratch, but by adapting something else?

I'm not necessarily technically minded, so preferrably without having to rewire or solder things...

Question by juliemosaic 10 years ago  |  last reply 7 years ago


DIY Batman Tumbler is Ultimate Fan Creation

The new Batman movies are so awesome that this fan decided to make his own version of the Tumbler, Batman's burly ride. The final cost is around $50k-$70k and an undoubtedly insane amount of time devoted to research, design, and fabrication. Oh, and he made a kickass Batsuit as well. Nutty. Link

Topic by fungus amungus 10 years ago  |  last reply 8 years ago


Anyone know how to make a rock tumbler?

I have purchased a number of buckets of colored granite and would like to really polish them up. It doesn't need to hold a lot at once, but would be nice if it did.

Question by terriradke 8 years ago  |  last reply 7 years ago


can i make a compost tumbler out of a non food grade barrell.

I am using a non food grade barrel that had a aqueous coating in it. It has been scrubed and cleaned very well. There appears not to have any residue left in it. What is the difference between food grade and non food grade?

Question by 10 years ago  |  last reply 8 years ago


How to change design of your coffee tumbler?

Was hoping there was an instructable for this, but there isn't! So does anyone know whether it's possible to take apart a Starbucks coffee tumbler so you can change the design insert yourself? I know Starbucks sell a tumbler with a screwed-on bottom so you can do this, but I already have a normal tumbler with a crappy design...

Topic by choklad 11 years ago


Batman Tumbler Golf Cart

This modified golf cart is apparently riding around some studio lot in Hollywood. Not much info about it except that one commenter claims it was made by Marc's Creature Company for a director who is not Christopher Nolan. Well, no matter what, it's a sweet custom job. Christopher Nolan Golf Cart via Geekologie

Topic by fungus amungus 8 years ago  |  last reply 8 years ago


Printing onto an acrylic tumbler?

My school has a club and we are ordering tumblers (the acrylic ones with acrylic straws and stuff) with custom prints on them. We only need 12, but most places have a minimum of 36 or there prices are just way too high. Is there any way I could print something and then transfer it to the cup? Thanks. Adam

Question by Adambowker98 6 years ago  |  last reply 6 years ago


How can I make my own rock tumbler?

I would like my own rock tumbler and thought there might be enough junk in my garage to put one together, or might not be too hard to find the items but I have no idea where to start.

Question by tonic4 9 years ago  |  last reply 7 years ago


Compost tumbler compost removal?

Some of the compost tumblers make it look like a pain to remove the finished compost. Any tips or advice about this?

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


is a rock tumbler a ball mill?

I have a rock tumbler and i dont want to buy a ball mill if i dont have to

Question by panzuman 9 years ago  |  last reply 7 years ago


How does a car key turn on a car?

I was wondering how the inside of a car "tumbler/ ignition" worked? How does it know that it is the right key? and Is there a switch to tell if the key has been turned? or is it some digital encoder?

Question by squirt8500 9 years ago  |  last reply 9 years ago


Sanding/polishing porcelain beads in a tumbler

I'm looking to tumble porcelain bisque (not the final firing, still soft enough to sand off impefections), and polish the final fired porcelain beads in a tumbler. See attached photos of a final fired porcelain bead for the scale. I'm wondering if you know what media, burnishing compound etc I should be using, and for how long.. I already have a 3lb capacity Lortone Tumbler with stainless steel shot currently for polishing metal. But I believe this tumbler also does rocks.

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


Is this a good idea for a improvised rock tumbler?

I had an idea after looking at my friends broken fan. I was thinking of ataching the rock tumbler barrel to the fan motor and puting it on the lowest speed. Do you think this will work and if it does i will post a instructable on it.

Question by Don,t try this at home 8 years ago  |  last reply 7 years ago


what tumbler can i use to polish up or smooth my 3d printed creations? Answered

I was wondering if there was a tumbler of some sort that i could purchase to smooth or put a finer touch to my 3d printed objects

Question by 3DeanPrint 3 years ago  |  last reply 3 years ago


DIY Batman Tumbler Go Kart

This guy built his own Batman Tumbler go kart. With his plans you can make your own. They'll cost you a little over $30 for the plans, but it looks like that will be a small fraction of the total time and expenses for this project anyway.But, Mr. Batman Tumbler Go Kart Guy, if you're reading this, we'd always be willing to host your plans here to open up this design to the world.eBay listing via NeatoramaSkip to 1:40 to see the go kart in action.

Topic by fungus amungus 9 years ago  |  last reply 3 years ago


Bicycle powered rock tumbler/exerciser

I was wondering if anyone had any ideas for a bicycle powered rock tumbler. Get exercise while watching videos and light tumbling of jewelry or softer stones.

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


my rock tumbler borke can someone tell me were to get the part or what i can use to replace it Answered

The first one shows the driveshaft with the thingy that was on it that helped it spin the 2nd one is the thingy that helped it spin?

Question by Don,t try this at home 8 years ago  |  last reply 8 years ago


how many watts does my rock tumbler use?

I just bought a rock tumbler off ebay. the brand name is "chicago power tools". its a basic 3lb capasity rock tumbler/ lapidary rotary tool. now, because i live in australia, i have a problem, my power outlets produce 240v , and the rock tumbler can only take 120v, and so when i pluged it into a power adaptor (us-aus), the transformer gegan to work, then overheated and produced smoke, fortunately it still works . now, i am going to go and buy a stepdown transformer and have learnt that if the device is using more than 90% of what the transformer supplies, the transformer will overheat or break or something. now, on my tumbler, and everywhere a description for it is put, it mentions nothing on wattage consumption, and so i am asking , how many watts will it use so i may accordingly select a stepdown transformer for it.

Question by oldmanbeefjerky 8 years ago  |  last reply 8 years ago


Knex key pin lock

Im search for a key lock with pins thats can slide.

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


Power wheels lightning McQueen conversion to bat tumbler?

I want to custom convert my kids power wheels lightning McQueen power wheels to the batman tumbler. I'm prepared to chop it up. I've never done this before. What's the best way to do this, what materials are better for all those panels? Best paints? 

Question by darkside3131 6 years ago  |  last reply 6 years ago


Knex safe

I am holding a competition for all Knexers worldwide. The competition is...you guessed it, a Knex safe Competition!!!!! Ok, so here are the rules: Rule 1# The object you must make must be either a safe or a gumball machine. Rule 2# The Safe must be made out knex and elastic bands only. Rule 3# The Safe or gumball machine must be either coin operated, key operated or has tumblers Rule 4# The Safe MUST be secure Rule 5# The safe must have instructions of good quality Any entry that fail to meet the rules will be disqualified Prizes: Every entry will be subscribed 1st Place 3 patches, A sub, 5 on all instructables and comments (if wanted) and the glory of winning 2nd Place 2 patches, A sub, 5 on all instructables and comments (if wanted) and the glory of coming second 3rd Place 1 patch, A sub, 5 on all instructables and comments (if wanted) and the glory of coming third 8 finalists will each receive a sub and a patch As i am becoming a member soon i will give out patches as soon as i can Thank you and start buildin' knexers!!!! :)

Topic by The Cannoneer 7 years ago  |  last reply 7 years ago


composting

I am getting ready to start composting, and I was wondering what all can you put in them. I know leaves, grass, food left overs, things like that. But can you put paper and cardboard, etc

Topic by rjltnvols 11 years ago  |  last reply 11 years ago


Rock tumbling, is there an economical substitution for grit & polish? .

I have vibrating & rotary tumblers. The commercial grit & polish I've been using, comes in a 4 step process. Is there a homemade grit or other options for tumbling rocks & gems?    Thank you

Question by Jolieblnde 7 years ago  |  last reply 1 year ago


How to make a replica of The Riddler's Box (Work in progress)

All right, I admit it. I liked Batman Forever, and still do. I also liked the "Box," which was the film's signature gadget. (And no, I don't count the Batarangs--they're equipment. The Box is a gadget in the purest sense of the word.) To that end, I decided to build a replica of the Box last summer. It's still not finished--I need to work out lighting, a motor, and the lower coils. (EL wire, maybe?) By the way, I'm posting it on the forum first because it's still a work in progress. I have no Monet to buy Degas to made de Van Gogh, as it were... YOU WILL NEED: One clear 28-oz. tumbler, acrylic (I got mine from Jewel for $1 last year...I don't know if they still carry 'em) One 20-oz. tumbler, acrylic (I got mine from Walgreen's last year...ditto) Two super-size cup lids from McDonald's One large bottle of Gesso One bottle of gold paint (Antique Gold works best) One bottle of green glow-in-the-dark paint A really long paintbrush, preferably made of foam A normal paintbrush The wings are made of a piece of foam I had lying around...I need to get them made specially. It's also got some Christmas-wreath lights stuck inside, just for the picture. ------------------------------------------------------------------------------------------------------------ SO: For the 28-oz. tumbler, first you need to thin your Gesso out with water. This will allow you, later, to add the paint in such a way that light can shine through. Then, you will want to paint the INSIDE of the tumbler with Gesso, and then with the green paint. Simple as that. For the 20-oz. tumbler, you can leave the Gesso thick if you wish. Depends on your preferences, really...Then, you'll want to paint the outside of the 20-ouncer with the gold paint. With me so far? Then, you'll want to glue the two McDonald's lids together for a bit of sturdiness. I recommend Gorilla Glue for this. When that sets, you'll want to paint the outside and the inside with Gesso. The outer lid is gold in color; the inner lid is black. This prevents light from shining through the lid, which could give the game away. WINGS: As for me, I cut a pair of 11 3/4" oblong triangles from foam for the wings. They're not stable at all, but at least you get the basic idea of what it is. I stacked the 28-oz. tumbler on top of the 28-oz. tumbler, put the lids on, and stuck the wings on with tape. It's a crude mockup, but it works for now. I put the Christmas-wreath lights inside just make it look like it's doing something. I'm thinking about adding a "Fusion" light from Windy City Novelties for the finished result. The final version of this will involve some very tricky wiring--I want to wire the light-up gadget and the motor to one switch or button. If any of you have suggestions, the mailbox is open and waiting. I've very little technical experience, and would like as much input as possible from anyone who knows something.

Topic by Sharaz Destler 7 years ago  |  last reply 7 years ago


Turn Aluminum ingots into Aluminum Oxide powder?

I've been smelting for quite a while and now want to make some flash powder, all tutorials use a blender or rock tumbler and aluminum foil, which I do not have(I have aluminum ingots, much more aluminum then just foil.) Can I smelt it out thin and file it finely?Or is there a better way

Question by tom10122 6 years ago  |  last reply 6 years ago


What to make ?

I found  electronic components at home. What I have 1. ON-off button switch 2. on-on tumbler switch 3. on dpb or something like this switch 4. 2 100k lin pote 5. on-on-off tumbler switch 6. 2 leds 7. 3 lm386's 8. 5 DIL sockets 9. 1N914 10. 100k 11. 1m 12. 470k 13. 220k 14. 4k7 15. 0.047uf 16. 0.0033uf 17. 100uf*16v 18. 2w 10k 19. 0.47uf 20. 220uf*16v 21. 0.01uf 22. 3 9v battery sockets 23. IR electronic volume control 24. speeker cable 25. cables. 24. Audio cable 25. 50 line pote 26. 9v adpater 27. 6.3mm audio socket 28. naked speaker cable socket 1) I wanna make something for my electric guitar. I have no idea what to make. 2) Something what is not sound related. I have no idea what to make.

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


Worthington Libraries Sugru Challenge

At Worthington Libraries, we hosted an "Inventor's Challenge."  We let our users knew all about Sugru, what cool stuff it can do, and how it can be used in unique ways.   Then we hosted an "Inventor's Fair" where we all shared our inventions, hacks and designs.  Take a look at our Sugru-ventions! Tumbler Repair with Sugru Rolled Sugru Beads Sugru Pie Server Fix 

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


Help with Canon Pixma Stepper

Hey all- Looking for some help with this little motor I pulled from a scrap Canon Pixma.  I want to use it to drive a very basic tumbler for 3d printed parts. I'm using it and the geared shaft to drive the drum.  Can I run this directly from a wall-wart, and if so, can you tell me what flavor to look for?  I'd like to just solder barrel connectors on and run with it. Thanks, Jeff

Topic by jeffw75 3 years ago  |  last reply 3 years ago


How to grind or shred aluminum cans?

Greetings, I'm am looking for methods to grind or shred up aluminum cans enough to be put in a ball mill (rock tumbler with steel balls in it) to make aluminum powder. I read that a stone grinder will cause it to melt. I read that aluminum foil can be ground in a blender then put in a ball mill, but I think aluminum cans might be too thick? Thanks

Topic by NeuroPulse 10 years ago  |  last reply 8 years ago


What will roll a can automatically? Answered

A while back someone posted a way to make ice cream, put your ice cream recipe mixture in a small coffee can, put that can in a larger coffee can and it surround the smaller one with ice and rock salt. You were supposed to roll it back and forth but I want something that will roll it automatically. I thought about an old toy rock tumbler or maybe I could find an old hot dog roller, anyone have any other ideas for something I could use?

Question by buffysissy1 8 years ago  |  last reply 8 years ago


Electric motor to turn large, non-centered load?

I would like to get a solar-powered motor to turn a compost tumbler at very low speed, and would like some advice at what the cheapest motor I can get that would do the trick. My idea is to have a ratchet system so it only needs to turn one click at a time every hour (having the compost bin make a full rotation every 1-7 days; I'll experiment with what works best). I've never done a project like this, so the more basic the advice, the better. Thanks!

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


Logistical Concerns: Building a Garden on my Apartment Patio

Edit/Update: I AM BACK (for those of you that know me, which is no one, :( womp) and I have decided to do this. I have moved apartments and am now on a nice first floor apartment with a large patio. I am planning things out and going to do some math this week. I am just curious, is there anything like this out there? I know I've seen those hanging gardens where the water trickles down? That is only good enough to grow herbs/small plants etc. Anything else? Thanks for your time everyone. I found this website today, and I have to say that I am glad I did! I've literally spent hours scouring the guides and have this idea in mind. Even through the questions I pose here, I must always keep in mind, "Will it work?" So please keep that question in mind as well. I have a space on my apartment patio that is fairly large (I will get exact measurements at a later time). I will need an elevated garden (with a trough w/reservoir below to capture the water, I live on the second floor and I can't let it run down below). Considering I eat a lot of fresh fruit and vegetables, I'm also thinking of a compost tumbler. First question, can I put almost anything in a compost tumbler that will break down, like fruits, vegetables, grass, leaves, et cetera,? Or does food waste and yard waste need to be separate? I live in Southern California, so my patio gets about 5-6 hours of direct sunlight. I've also been reading that compost bins need some humidity as well. I was thinking of using the reservoir under the garden to put in the compost tumbler from time to time? Would this be effective/necessary? Slugs might not be a problem because I'm on the second floor, but I'm thinking of keeping and Aloe plant out there and use the Aloe spray I saw in a guide. We do have squirrels, but are they attracted to Tomatoes, Cabbage, Basil, et cetera? If so, I will need to build some sort of cage that will keep them out. Is this practical, necessary, and ultimately effective? Thanks for your time ladies and gentlemen. If I do end up going through with this I will record the whole thing and put a guide up!

Topic by Neddaf 9 years ago  |  last reply 8 years ago


How do I clean a 55 Gallon Plastic Drum that contained Industrial Grade Detergent?

I picked up three free 55 gallon plastic drums after seeing them posted on craigslist.  I was inspired by the compost tumbler and rain collection instructables, and I was looking to build my own.  However, the plastic drums contained an industrial grade detergent used in food and beverage processing facilities.  Two of the barrels were FiChlor Foam HD and the other contained Liqualin CC.  Do you think I could clean these out enough to make them safe for these projects?  Would the chemicals have leaked into the plastic? For rain collection, I was going to use the water for flushing my toilet, so it wouldn't be for watering a garden, and definitely not for drinking.  For the compost, would the chemicals remaining in the plastic leak into the compost?  And then would any plants exposed to that compost die? I really appreciate some feedback on this.  I've read most instructables on here that involve 55 gallon plastic drums, and the recommendation is to use Food Grade containers.  I'm just disappointed about the possibility of not being able to use the ones I picked up because they contained a detergent.  The containers are marked as "Corrosive" and "Do not reuse this container unless it is first professionally cleaned and reconditioned."  This is definitely a bad sign. :( Thanks guys, Eoin Here's some information I found from the manufacturer, Chemetall: Safety and Handling Precautions: Oakite FiChlor Foam HD is a highly alkaline chlorinated material containing sodium and potassium hydroxide. Direct contact causes irritation of eyes and skin. It is harmful if swallowed. Avoid contact with eyes, skin and clothing. Wear safety goggles, rubber gloves and other protective clothing when handling. Wash thoroughly after handling. Avoid breathing vapors. Use only in well-ventilated areas. Do not take internally. Liqualin CC:  Heavy-duty, low foaming, non-silicated alkaline liquid for use in CIP systems or spray washing stainless steel processing equipment in beverage and food plants.

Question by eoingrosch 9 years ago  |  last reply 4 years ago


URGENT need help building a power supply for a 12v winch motor max rating 30A URGENT

Im trying to build a power supply for a parts tumbler ive been working on (instructible coming soon!) ive been using a battery charger to run it right now but it doesnt have enough power, i would need something that can output 12v about 30A max ( thats the value of the fuse the motor uses) im trying to mod a computer power supply right now but i dont think that this will be enough either, i want to build something from the ground up designed for this purpose that would cost max 30 bucks or is there anything else i could adapt? ive searched everywhere but only power supplies i can find plans for or any advice are either bench top ones for electronic projects (5v), any help would be greatly appreciated and thanks in advance to anyone that can help me out

Question by bart.p 7 years ago  |  last reply 7 years ago


Motor Speed Controller. I have recently purchased a 115v Bodine Electric 42R Series AC Induction Motor

 I want to be able to control the speed of this motor to use for my homemade brass reloading tumbler. I am currently using a cordless drill which is not practical for the lenght of time the brass must tumble. http://www.youtube.com/watch?v=cvunTv-5x7A The specs for the motor are as follows.. 42R Series AC Induction Motor Standard Features Totally enclosed IP-20 rating. Fan cooled for high output power. Class "B" insulation system operated within Class "A" limits to prolong winding and lubricant life. Aluminum center ring and end shields for high thermal efficiency and light weight. Permanently lubricated, noise tested ball bearings. Locked bearing design minimizes shaft endplay. Application Information Capacitor is not included. Order with motor if required. Models are available with either NEMA C face mount or base mount. Any suggestions would be greatly appreciated.

Question by ehays 8 years ago  |  last reply 8 years ago


INNOVATIVE KNEX SAFE

CONTEST EDIT!! first person to figure out the mech and build it gets kudos from me!! :D Whats this, a SAFE? I've seen hundreds of these, you can just pull the door open or easily pick the lock. Wait, thers no TUMBLERS! How can that be? That must be new! WELL IT IS BRAND SPANKIN NEW AND HAS NEVER EVER BEEN DONE BEFORE!!!!!!!! A secure knex safe that opens with a KEY! and its a very specific key. ONLY 1 KEY WORKS ALL THE OTHERS WILL NOT TURN! Tis is truely my most innovative creation EVER! If you do not like this, your a hater! I am going to be inactive so criticize me if you want it wont do anything. BEST THINGY EVER TRY TO BUILD FROM THE PICS IF YOU CAN! AHAHAHAHHAAHA I will put up a video soon.   Sorry it's gone so no instructions :(   If anyone wants to build this please check out zbrown2016's instructable. It is very simmilar and I believe he did a great job on trying to replicate my prototype from the few pictures I've posted.  

Topic by Electroinnovation 9 years ago  |  last reply 6 years ago


Help figuring out electric motors

I'm trying to decipher the mystical language of electric motors and need some help. I was at one of my favorite stores yesterday, a place called 'Industrial Liquidators' here in San Diego, and I was looking at their vast supply of electric motors. Big ones, small ones, battery operated ones, flat one, all in latest styles and fashionable colors. I know of plenty of uses for these things but I have no idea what it is I'm looking at. I would like to make my own rock polishing tumbler, so I'd like a motor with a bit or power and a slow rotation, but how can I figure out how strong and fast a motor is?Maybe I'm starting at the wrong place. I must admit that I know next to nothing about electrical stuff. Pretty much the only thing I know about electrical equipment is that it only works when you plug it into a socket.So that being what it is, can anyone direct me to a website that explains how to read these motor labels? Ya know the ones that say how many ohms, volts, amps etc.Thanks for any help.

Topic by astro347 10 years ago  |  last reply 7 years ago


I have been working on a robot for a while. Can someone help me my code?

I built a robot with an arduino and a thunder tumbler rc. Can someone help me with my code? I will post a video on youtube of what it does. I want the tumbler to drive straight and when the bump switch gets hit it will back up and turn left or right(can remember) and then drive straight again. Here is the code. There might be a few stray bits from a ping ultrasonic sensor in there as well. I dont want that but i didnt see anything left. int switchPin= 2; // Right bump switch on pin 2 int swval; int ledPin = 13; // LED connected to digital pin 13 int motorpinright = 11; // pin for left motor reverse int motorpinleft = 9; // pin for left motor forward int motorpinrevright = 3; // pin for right motor reverse int motorpinrevleft = 10; // pin for right motor forward void setup() { pinMode(switchPin, INPUT); // Sets the digital pin as input pinMode(ledPin, OUTPUT); // Sets the digital pin as output pinMode(motorpinright, OUTPUT); // Motor drives----------- pinMode(motorpinleft, OUTPUT); //------------------------ pinMode(motorpinrevright, OUTPUT); //------------------------ pinMode(motorpinrevleft, OUTPUT); //------------------------ } void loop() { delay(100); analogWrite(motorpinleft, 255); //100% speed analogWrite(motorpinright, 255); //100% speed0 analogWrite(motorpinleft, 0); //stop left motor analogWrite(motorpinright, 0); //stop right motor analogWrite(motorpinrevright, 0); // stop right rev motor analogWrite(motorpinrevleft, 0); // stop left rev motor analogWrite(motorpinrevright, 255); //100% speed analogWrite(motorpinleft, 255); //100% speed delay(380); //380 milliseconds analogWrite(motorpinrevright, 0); // off analogWrite(motorpinleft, 0); // off digitalWrite(switchPin, HIGH); // Sets the pin to high swval = digitalRead(switchPin); // Read input value and store it if (swval == LOW) { analogWrite(motorpinleft, 0); //stop left motor analogWrite(motorpinright, 0); //stop right motor analogWrite(motorpinrevleft, 0); // stop left rev motor analogWrite(motorpinrevright, 0); // stop right rev motor analogWrite(motorpinrevleft, 255); //100% speed analogWrite(motorpinrevright, 255); //100% speed delay(800); //800 milliseconds analogWrite(motorpinrevleft, 0); // off analogWrite(motorpinrevright, 0); // off analogWrite(motorpinrevright, 255); //100% reverse speed analogWrite(motorpinleft, 255); //100% forward speed delay(700); //700 milliseconds analogWrite(motorpinrevright, 0); // off analogWrite(motorpinleft, 0); // off delay(50); //50 milliseconds } /*------------------------------------------------ */ }  

Question by TOCO 8 years ago  |  last reply 8 years ago


(newsletter) Kidnapped Mermaid, Batman Display, "Billie Jean" Sidewalk

Sign-up for this newsletter: Welcome back! Last chance: Arduino Contest - Make anything involving Arduino and win an Arduino Mega or a sweet prize from Evil Mad Science! Closes Sunday! As the nights get longer, stay visible for the Light Up the Night! Contest. Win some cool clothes from Cordarounds with secret reflective powers! Help choose Halloween Contest finalists. Vote now! Want a more convenient version of Instructables with fewer ads? Get a Pro Membership! Kidnapped Mermaid Costume Walking Stick That's Also a Chair Bar End Brake Light for a Bicycle Scrap Table Hand Truck from a Shopping Cart Digital Window Sticker with Arduino Make Candy Corn DIY Apple Remote Shield for Arduino Build a "Billie Jean" Sidewalk 10-minute Sewable iPod Remote Make Your Own Illuminated Signs Umbrella Light Dance Dance Revolution Purse Twelve Monkeys Costume Build a Paintball Mine Batman Display with Batmobile Tumbler Instructables.com - 82 2nd St. - San Francisco, CA Sign-up for this newsletter:

Topic by fungus amungus 9 years ago  |  last reply 9 years ago


Engineer's Duel

Hi everyone, I'm new here to this forum site but I wanted to share an idea I've been kicking around for a while now.  I'm a huge fan of the Fantasy vs Science Fiction debate and often like to combine certain elements from each into one another (ie Spell Casting Robots, Steampunk Wizards, etc). One of the staple elements of any Fantasy work is the iconic Wizard's Duel, when two magical wielders face off against one another using a combination or various spells, attacks and magic.   Now, I've always been interested in the kinds of sports/ competitions that focus scientific and engineering minds (robot battles). So I devised one of my own today, just something I think would be really interesting to watch. It's sort of like a modern day resurrection of medieval duels, but instead of weapons the duelers use inventions. Engineer's Duel Overview: Two inventors face off, each utilizing different inventions they've built to best their opponent, and eventually destroy them (or at least incapacitate). The purpose of the battle is to test the wits, intelligence, strategy and inventing skills of each of the duelers.   The goal is not to destroy the opponent, but instead their chosen gadgets until yours is the last one surviving. Rules: 1) No Robots. This fight should be between the duelers themselves, not their robotic minions. 2) No Direct Weapons Allowed (devices that serve no other purpose except as a weapon). Eg no guns, swords, canons, etc. The purpose of the duel is not about how powerful an invention one can build, but how inventive it is and how well the dueler uses it. 3) Each invention chosen by the duelers must be used at least once in the fight. 4) No EMPs, for obvious reasons 5) Vehicular machines such as Tumblers, Mech Warriors, and Giant Hovercrafts are allowed but only in the National Primaries. Other than this, if you can build it, you can use it. So yeah tell me what you think!  

Topic by SHIFT! 8 years ago  |  last reply 7 years ago


Magnetic actuators - anyone here ever made one?

Magnetostrictive alloys like Galfenol are not only quite cheap but also quite possible to produce and machine at home. As it seems that right now I can't finnish anything without being stopped by something else that got my attention I am a bit stuch on all ends now LOL Anyway, I still have a few kg of rare elements like Gallium, Bismuth, Antimony and such that I misused for my testing of home made ferrites. So apart from making some fancy metals that melt at very low temperatures I thought a much better test usage would be to make something that for once has some real world use :) If you look up some of the research papers for Galfenol use or magnetostrictive materials in general you soon learn two things: a) You need a degree or have studied something related to fully understand the technical stuff behind it. b) Finding something that would give you enough info to make something that works as planned is next to impossible. I don't mind wasting some time on melting steel, machining some samples and do some testing but of course this takes a lot of time... So I was wondering if anyone here already experimented with magnetostrictive materials and their possible uses? Apart from micro actuators for minature things I don't have I was thinking of generator use. A lot of things produce wanted and unwanted vibrations, magnetostrictive alloys are capable of transforming them into electrical energy by simply using a coil around the material. For example the recoil of your favourite hunting rifle could in theory charge your dot sight or laser sight/flashlight. Or the otherwise useless vibrations of big machines or rock tumblers can be turned into something to charge your phone. Not to mention impact sensors or flat surface loudspeakers....

Topic by Downunder35m 2 years ago


I need arduino code help. Answered

I have a code for my robot and when i try to compile it I get an error. error expected unqualified-id before 'if ' here is the code // Connections to the Tumber PCB // // Arduino : Tumbler // pin 9 ---- pin 6 // pin 10 --- pin 7 // pin 3 ---- pin 11 // pin 11 --- pin 10 // ground --- pin 2 (ground) // // int inputVariable = HIGH; // sets input to high int RightFwd = 3; // PWM Output to go Foward on Right Wheel int RightRev = 11; // PWM Output to go Reverse on Right Wheel int LeftFwd = 9; // PWM Output to go Forward on Left Wheel int LeftRev = 10; // PWM Output to go Reverse on Left Wheel int delaytime = 2000; // delay between steps int speedval = 145; // speed forward and reverse, at 50% (of 255 max) void setup() { pinMode(inputVariable, INPUT); // Sets the digital pin as input inputVariable = digitalRead(2); // Right bump switch on pin 2 digitalWrite (inputVariable, HIGH); // Sets the pin to high pinMode(RightFwd, OUTPUT); digitalWrite(RightFwd, LOW); // Make sure Output is initally at LOW pinMode(RightRev, OUTPUT); digitalWrite(RightRev, LOW); // Make sure Output is initally at LOW pinMode(LeftFwd, OUTPUT); digitalWrite(LeftFwd, LOW); // Make sure Output is initally at LOW pinMode(LeftRev, OUTPUT); digitalWrite(LeftRev, LOW); // Make sure Output is initally at LOW delay(delaytime); } void loop() { analogWrite(LeftRev, 0); analogWrite(LeftFwd, speedval); // turns on the left wheel in forward direction at the speed value analogWrite(RightRev, 0); analogWrite(RightFwd, speedval); // turns on the right wheel in forward direction at the speed value delay(delaytime); analogWrite(LeftFwd, 0); // turns off the left wheel analogWrite(RightFwd, 0); // turns off the right wheel delay(delaytime); } if(inputVariable == LOW); } analogWrite(LeftFwd, 0); // turns off the left wheel analogWrite(RightFwd, 0); // turns off the right wheel analogWrite(LeftRev, 0); // turns off left wheel analogWrite(RightRev, 0); // turns off right wheel analogWrite(LeftRev, speedval); // turns on left wheel rev analogWrite(RightRev, speedval); // turns on right wheel rev delay(800); // 800 milliseconds analogWrite(LeftRev, 0); // turns off left wheel analogWrite(RightRev, 0); // turns off right wheel analogWrite(LeftFwd, speedval); // turns on left wheel analogWrite(RightFwd, speedval); // turns on right wheel } I bolded the line that the error comes up on

Question by TOCO 8 years ago  |  last reply 8 years ago


I need arduino code help. It gives me an error?

I am making a new code for my robot and when i verify it an error comes up. the error is  " error expected constructor, destructor, or type conversion before '(' token" here is the code // Arduino : Tumbler // pin 9 ---- pin 6 // pin 10 --- pin 7 // pin 3 ---- pin 11 // pin 11 --- pin 10 // ground --- pin 2 (ground) // // int switchPin= 2; // Right bump switch on pin 2 int swval= HIGH; // Variable for reading switch status int RightFwd = 3; // PWM Output to go Foward on Right Wheel int RightRev = 11; // PWM Output to go Reverse on Right Wheel int LeftFwd = 9; // PWM Output to go Forward on Left Wheel int LeftRev = 10; // PWM Output to go Reverse on Left Wheel int delaytime = 2000; // delay between steps int speedval = 145; // speed forward and reverse, at 50% (of 255 max) void setup() { pinMode(switchPin, INPUT); // Sets the digital pin as input pinMode(RightFwd, OUTPUT); digitalWrite(RightFwd, LOW); // Make sure Output is initally at LOW pinMode(RightRev, OUTPUT); digitalWrite(RightRev, LOW); // Make sure Output is initally at LOW pinMode(LeftFwd, OUTPUT); digitalWrite(LeftFwd, LOW); // Make sure Output is initally at LOW pinMode(LeftRev, OUTPUT); digitalWrite(LeftRev, LOW); // Make sure Output is initally at LOW delay(delaytime); } void loop() { analogWrite(LeftRev, 0); analogWrite(LeftFwd, speedval); // turns on the left wheel in forward direction at the speed value analogWrite(RightRev, 0); analogWrite(RightFwd, speedval); // turns on the right wheel in forward direction at the speed value delay(delaytime); analogWrite(LeftFwd, 0); // turns off the left wheel analogWrite(RightFwd, 0); // turns off the right wheel delay(delaytime); } digitalWrite(switchPin, HIGH); // Sets the pin to high swval = digitalRead(switchPin); // Read input value and store it if (swval == LOW) { analogWrite(LeftFwd, 0); // turns off the left wheel analogWrite(RightFwd, 0); // turns off the right wheel analogWrite(LeftRev, 0); // turns off left wheel analogWrite(RightRev, 0); // turns off right wheel analogWrite(LeftRev, speedval); // turns on left wheel rev analogWrite(RightRev, speedval); // turns on right wheel rev delay(800); // 800 milliseconds analogWrite(LeftRev, 0); // turns off left wheel analogWrite(RightRev, 0); // turns off right wheel analogWrite(LeftFwd, speedval); // turns on left wheel analogWrite(RightFwd, speedval); // turns on right wheel }

Question by TOCO 8 years ago  |  last reply 8 years ago