Balance bike wheels ?

I am in the Uk and have problems finding small. Wheels for the balance bike . Any suggestions any one?  Thank s  Jonolydney 

Asked by Jonolydney 2 years ago | last reply 2 years ago


balancing windmill blades

A 5 blade rotor. making our own replacement blades a fair bit o' resestance to rotation from the generator, therefore, balancing it on the generator shaft is probably a no=go. the owner, for whom i'm doing the work suggests balancing 2 blades against one another.   But there are 5!  not 2 or 4.   maybe we make it a 4 blade... maybe we make sure each blade is excactly the same weight AND with CG at the same distance from center (sounds cumbersoe to get both mass And cg identical. suggestions?

Posted by Toga_Dan 4 years ago | last reply 4 years ago


How to balance a mobile... and attach its parts?

I've always been interested in making mobiles, or at least making the various parts that I would like to balance in a mobile. I've only really made one, which was a real hack job. I want them to look nice, so...two questions: 1) Is there a scientific method for achieving balance in a mobile apart from guessing? In the one that I did make, I used a fairly thick flower-wrapping wire, tied the parts to each end, and then found the fulcrum by balancing it on my finger. This is an awfully rough approach and is only so accurate. It worked okay, but I'd like to know how you've found success in doing this. 2) As far as attaching the parts to the end of the wire, how do you do it? I'm not very happy with the flower-wrapping wire because it's so tender and warps so easily. It's impractical for shipping or moving the mobile. Not at all durable. So what material do you use for the wire portion, and HOW do you attach your parts to it? I've tried twisting loops into the wire, but it really messes up the general straightness of the wire. I've tried tying fishing line onto the wire and adding a dollop of glue. But that's just ugly. If you have a good online source for making simple mobiles, and the materials one should use, I'd love that too!

Posted by svirden 9 years ago | last reply 8 years ago


Need to know the part I am looking for

I am planning another project. It will be a somewhat Portable Steam Punk Balance ( Scale ) . The idea is only one arm is to be exposed the other will be shorter and I want to attach it to ( PART? - I was going to say actuator but probably not the right part ) I want something that measures the distance it moves so it can be scaled to what the weight is. I want to hook this up to an Arduino to to the scaling and then output it to a display. The part will be hidden so looks are not important , I just want to know what is the name of that part and any sources would be greatly appreciated. TIA for those that help. Gunther45

Posted by Gunther45 6 years ago | last reply 6 years ago


how to build a balance board with proximity sensor and arduino

Hey guys,  So I am trying to figure out how to build a virtual balance board( using processing and Arduino), that responds to human weight when leaning left or right. An object would be falling in the screen on one side of the balance board and the person has to lean to the other side to keep the balance.  I would like to use a proximity sensor to receive and send the data ( weight ) to Arduino. I may want to use spring board for enhancing the force. So i need your help with the Arduino part, connections and coding, I appreciate your help and guidelines. 

Posted by shanymz 6 years ago | last reply 6 years ago


Arduino-powered ball balance machine

This wood panel has the ability to move a ball anywhere it wants thanks to Arduino, servos, and processing. If the noise could be cut down this would make for a very cool installation. Origamata via Make

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


How do you make an escapement with a balance spring?

I have a problem My cat has a weak stomache so he needs to have a lot of small meals during the day, but there's not always somebody at home, so I wanted to make a cat feeder device for this. I want to make a disc that rotates slowly, during the day, leaving open another segment of a cilinder after every period of time. In every segment of the cilinder is cat food(which is poured into it that morning) Under the cilinder I want a clock mechanism, with a balance spring. I want to make it with a balance spring because it shouldn't be too high, my cat needs to be able to reach it's food normally. I've made a mechanism with a pendulum before, but it was one meter in height, while now i want the mechanism about one inch in height. I thought only a balance spring would fit right in the cilinder under the feeder, but I never worked with one, I don't have one either. How does a clock escapement with a balance spring work? And how can I get a balance spring? Can I just roll a long metal strip intro a spring? My cat feeder doesn't need a complicated gear train, because whether it makes one revolution in 10 hours, or in 14 hours, that doesn't matter. thanks

Posted by merijnvw 9 years ago | last reply 9 years ago


Balance Bike type of RideOn but for grown ups? NoPedals

You know all the kind of training bikes LikeABike and Strider RideOn so many different brands and varieties and naturally them are for the kids so young them have not learned to pedal and keep balance so these first "bikes" are for them to run along like on a "Hobby Horse" kind of thing that have the added safety of both feet on the ground when them need to gain balance again. Them sit and walk or run and seem to really enjoy it. Now suppose you are some 65 years older than these kids. You have the balance and can go by pedaled bike but them are not allowed to take on the Commuter Train or on the Bus that goes to the big Mall you want to visit and when you arrive no bike is allowed in so it get vandalized or stolen outside. But if you had a Walker or Rollator kind of mobility aid then that would be allowed. So what if one took a "Toddler" bike and made a grown up RideOne or BalanceBike for grown ups. No pedals on it. That would not get allowed either unless it has an electric motor and look like an expensive Mobility Scooter. So one need a Rollator that transforms into a RideOn. type of seated thing that can be used to move around on. I wish one could easily combine these two things but I fail to have enough innovation fantasy on how to accomplish this. So I test if kind people here get a clue or hang on how one could do such a thing. Transformer Bike/Rollator or what to name it. I have bought several Rollators and several KickBoard GoPed similar versions one are supposed to stand on or walk behind All of these are hurting the knee. So one need a seated thing. Sure it does exists already. The KneeScooter but that one have a seat that is too narrow so it hurts the butt. The customers complained so now one can buy an extra seat or saddle to it that is broader and less painful. But the KneeScooter does not look like a Rollator at all. It looks like a Scooter. A Rollator need Castering wheels in the front that seems a must. It can be a three wheel as long as the caster is the front wheel. Now if you sit on a four or three wheel thing and push of or kick off with feet on the ground then there is now way to steer the thing. so a transformer bike/rolator need to change from free wheeling caster to a steered caster to be safe. So that is the criteria and difference. In one position it looks like a real standard Rollator that you walk behind or in front off. Then after pushing the magig button it turns into the steerable seated balance bike kind of mobility RideOn for grown ups with knee problems. I have written about this in another post too so hope I am not breaching a hard hitting rule. Here I ask more what to name such a thing and how to make that thing so popular that the accumulated popularity makes the commercial companies aware of the need. If we can come up with a catchy name for such a thing then somebody maybe make one and test the market? On the other thread I ask for somebody to help me figure out how to DIY make one or to modify a standard Rollator so it can fill both functions. You would make me very happy if you come up with a catchy name for such a thing.

Posted by kneeproblemguy 7 years ago | last reply 7 years ago


what does a Canadian penny weigh? Answered

I'm working on a model plane right now, a mig 31, and you have to add in the weights before you have any chance of actually knowing if they are enough or not. the instructions say to put in 7grams, but i don't know how many pennies i would need for that. can someone tell me how much a penny weighs., or better yet, just how many i need? thanks.

Asked by the poodleo 7 years ago | last reply 5 years ago


An Exploratory Research Mechanism

Designed and Built by Emile Cole Range of Motion Video (profile).... http://www.youtube.com/watch?v=P_vF3...layer_embedded Range of Motion Video (front).... http://www.youtube.com/watch?feature...&v;=E7CEwnOFnCk   Hello all.... I've been working on this (hobby status) on and off over the last fifteen years or so.... a mechanism that immediately begins to rotate in either direction with an imbalancing displacement of as little as one degree. With repeated periodic displacements of as little as five to seven degrees its rate of rotation rapidly approaches about a 100 to a 150 rotations per minute over the course of just eight to ten repetitions, all while overcoming only negligible frictional resistance from the main axel (equipped with bearings). It may have some applications for extracting rotational motion more efficiently from wind and wave and maybe a couple of other things too.... or it may just be a work of art.

Posted by EmileCole 5 years ago | last reply 5 years ago


Self-Balancing Smart Scooter

I hope you enjoy the job, Greetings

Posted by Andromeda30 3 years ago | last reply 3 years ago


Simple Lithium Cell Balancer?

Could your balance a lithium cell by simply hooking it up in parralel for a short period of time every once in a while?

Asked by snowluck2345 7 years ago | last reply 7 years ago


How can I balance a wobbly ceiling fan without the sticky weights that come with it?

I do not have the balancing kit that comes with new fans, and I don't want to glue washers to the back of the blades. Is there a better way to balance a ceiling fan without a kit?

Asked by ivyplant 9 years ago | last reply 9 years ago


How To Turn ATH-MSR7s Into Balanced Headphones

So, I've Had a Pair of ATH-MSR7 Headphones for a few months now and I've wanted to know how to turn them from standard wiring to balanced wiring with 3.5mm jack endings (Got the Idea after reading how to do this with the ATH-M50X Model, https://www.instructables.com/id/Balanced-Headphones-for-About-130/) If Anyone can give me an answer or point me to a tutorial (Trust me, I've searched, can't find a tutorial) i'd be mighty grateful. Many thanks for a reply. Also this is for a portable DAC with two headphone Jacks like a Pono or an AK240. Thanks again.

Posted by Desmin Grey 1 year ago | last reply 1 year ago


What do i consider while making a flying machine? Answered

For a while i've been studying, designing, and building hang gliders. To my great disapointment however, none of them have even glided. I am starting to think there are more things to consider than just center of gravity, balance, and the over all "lightness" of the craft. Are there more things i should consider? I have also pondered upon the idea to make a Ultralight Helicopter, or somthing along those lines. What are some things i need to consider beond what i've already mentioned?

Asked by aar0nc0le 7 years ago | last reply 7 years ago


Hi, new member here... Make your own balance board

Hi,I'm a new member here. I've got a video on metacafe that shows how to build a balance board.Here's the link:http://www.metacafe.com/watch/372773/make_your_own_balance_board_indoboard/Please leave a comment if you like it,Sam

Posted by sam noyoun 11 years ago | last reply 11 years ago


How to make a self balanceing robot using mpu 6050? Answered

Recently I brought my self a mpu 6050, and I was wondering how to make a self balanceing robot with it ? Iam curently having problems with the code (arduino) and was wondering if any one knows any tutorial related to this... thanks

Asked by ThisIsSteve 4 years ago | last reply 4 years ago


in a counter balanced system, do I need to account for both the load mass and the counter balance mass for acceleration?

I have a simple 2 pulley system lifting a 2400lb mass.  Imagine a chain lift, starting at the load mass, up over a sprocket, across to a second sprocket, then down to a 3000lb counter balance mass.  to move the load down, I'll need to apply 600+ lbf down on the load.  To move the load up, I'll apply <600lbf to the load.  That's simple.  Now, during the move I need to STOP quickly.  Do I need to account for only the 600lbs difference or the 5400lbs of moving mass?   _________________   |O                                O|   |                                      |   |                                      | 3000lb                         2400lb counter                        Load

Asked by JFunsch 6 years ago | last reply 6 years ago


Anyone have a pattern/instructable for a kids wooden balance bike? Answered

I'd love to make my little guy a wooden balance bike, something like the Skuut (http://www.skuut.com/default.aspx). But I'm a bit flummoxed as to how the front steering part works (where the handlebars intersect with the front fork). Anyone have ideas?

Asked by sallycinnamon 9 years ago | last reply 6 years ago


Balance Sessions Part II

A while ago, I posted a video and an instructable about balancing boards. In the video I promissed viewers that there would be a sequel with the construction of my homemade board. Here it is.Hope you like it! I spent about two days making the board. And about 4 hours chopped up of editing.How do you like my editing?-Evan

Posted by evy-wevy 11 years ago | last reply 11 years ago


Wine Stand that is a Balancing Act

Does anyone know how to construct this balancing piece of wood that holds a bottle of wine. I hate to spend over $20 for a 50 cent piece of wood that I could make at home.I appreciate your help, and I just know there are a few of folks that are mechanically inclined that can solve this...Thank you!http://store.komando.com/p-244-wooden-bottle-balances.aspx?utm_source=l&utm;_medium=email&utm;_content=bottle_balances&utm;_campaign=topBalancing ActCoolest way to store a bottle of wineIs this magic? No, it's a little science. The weight of the bottle shifts the center of gravity that makes the wine appear to be suspended in mid-air.You'll get loads of comments, smiles and laughs! These positive reactions make these wine bottle balances a perfect gift! After all, Ben Franklin said, "Wine is constant proof that God loves us and wants us to be happy."Made of solid wood.

Posted by KeyWest 10 years ago | last reply 10 years ago


I rly wanted a balance board...

I saw this article, https://www.instructables.com/id/EDD7R6KO9NEZ7BDXU9/#CES5NYIC7SAEZ7BETEOand made this:http://www.youtube.com/watch?v=dH_mGLy8irQtell me what you think please!

Posted by evy-wevy 11 years ago | last reply 11 years ago


Are we losing you guys? LOL The organization seems a little out of balance these days. :)

Are we losing you guys? LOL The organization seems a little out of balance these days. :)

Asked by Attmos 9 months ago | last reply 9 months ago


How to make a balanced spool valve? For a PVC airgun, need quick release valves.

I'm trying to make a 50 caliber airgun, but this time with a better valve. My previous one had a ball valve, and it's sticky, hard to aim, and just troublesome. I did a bit of research on airgun valves, and it seems as though the balanced spool valve is a good one to try. However, all the searches seem to be focused on the discussion, not the making of the valve. I'm going to be using PVC, hopefully 3/4"+ for the air chamber. Anyone know how, or know a better valve? Thanks! 

Asked by Batryn 6 years ago | last reply 6 years ago


Self-Balancing-Unicycle

Hey everyone, I need some help for my project paper. I want to build a self-balancing "one wheel". But I dont know where I can buy a wheel hub motor. I searched on Alibaba and found some fitting ones. A 800W 48V DC Brushless (Wheel Hub-) Motor. But i don´t know which speed motor control is the best for this type of motor. I want to use an arduino uno ! Can someone please Help me finding a motor control ? Thanks a lot :) PS: Sorry for my bad english :) I am german

Posted by Lucafaeth 2 years ago


Charge AND balance 4 Lipo packs? Series Parallel solution help.

I have x4 identical Turnigy Graphene Professional 5200mAh 3S2P 15C LiPo Packs w/XT60 - and I need 22.2v out of them for a portable boombox project.   I have x2 12S 30A BMS's to balance / charge on board and a 600w 48v 12.5 A power supply. By wiring up the battery packs in series then parallel to get the 22.2v output - if I then connected the BMS (either by directly wiring to each cell or using the pack balance plugs) would it would cause a short circuit through the balance wires?    The ideal solution would be a wall plug power supply that plugs into the (sealed) boombox and charges all of the batteries through the BMS's. Is there any way of achieving this through parallel charging (not a fan) or could I switch easily between the two wiring set ups?   I'm trying to avoid buying a £200 Lipo charger and connect the batteries directly or keep disassembling the boombox every time it needs charging. Thanks

Asked by MechaMatt 1 year ago | last reply 1 year ago


[Answered] Balance Control Not Working Properly?

Okay, I bought an older karaoke system, which I am using as a speaker for my iPod and an amp for my guitar.  As you have probably deducted from that, it has RCA stereo auxiliary inputs and 2 mic inputs.  I plug my iPod into the RCA aux in jacks, and it is sending out a stereo signal.  The cable I use is a special cable originally intended for an audio/video cable for my camera.  It's wiring scheme allows me to use it as a 3.5 mm (1/8 in) male audio plug to the two stereo, RCA male plugs.  I press play on my iPod, and of course music comes out.  The "amp" has a balance pot on it (pot meaning knob).  When the balance pot is centered, the left channel is full volume, but the right channel is weak.  To get the full right channel, I have to turn the pot all the way right, which of course blocks the left channel out.  There is a "sweet spot" around the 4 o clock position that evens out the channels, but they aren't as strong.

Asked by KaydenST 6 years ago | last reply 6 years ago


iMAX B6 Digital Battery Balance Charger

Hey i just found this cheap charger on eBay and i was wondering if it would be able to charge a pack of 18650(unprotected) 3P4S safely? i figure i could just run the charger to each 3P set and be confident it want gas/explode? http://www.ebay.com.au/itm/iMAX-B6-Digital-Battery-Balance-Charger-and-Discharger-For-Lion-LiPo-LiFe-GL-/282048500472?hash=item41ab6692f8:g:ACQAAOSwH6lXRSCK

Posted by andrewlapham2010 2 years ago


What is my problem with this program? Answered

I am using C++ I know it has something to do with the 'cin' command.  I am trying to get numbers for an array, and I've heard that 'cin' doesn't work for arrays.  The array is supposed to be variable in length. #include #include using namespace std; int main () {     string input = "";     short int choice = 0;         cout << endl << "This weight and balance calculator will determine the cg of your aircraft." << endl;         if (true) {           cout << "Press any key to continue: " << endl;           getline (cin, input);           if (choice != 0.0000001);           {                     goto WB;                     }                     WB:              int w = 0;           float d = 0;           float s = 0;    int m = w;    float tw = 0;    float tm = 0;    int weight[w];    int moment[m];                     while (true) {           cout << endl << "Please enter the amount of masses within the aircraft, including fuel and the aircraft itself: ";    cin >> w;    cout << endl << "Please enter the weight of the aircraft, occupants, fuel, baggage, etc.: ";           cin >> weight);           cout << endl << "Please enter the moment of each listed item (Weight x Arm = Moment): ";           cin >> moment);    cout << endl << "Enter the total weight: ";    cin >> tw;    cout << endl << "Enter the total moment: ";    cin >> tm;    float cg = tm / tw;           cout << endl << "The cg is: " << cg << endl;           } } }

Asked by KaydenST 6 years ago | last reply 6 years ago


How to pay out with existing paypal balance? Answered

I have had money payed into paypal, and sent out a payment which took the money from my bank account. Is there a setting to pay using the money that I have in my paypal account?

Asked by RMConstruction 7 years ago | last reply 7 years ago


bike help?

I have a little brother and he is now learning how to ride a bike but every time he starts to ride he can not keep his balance and gets scared and stops he almost has it i need help to make something to keep his balance while riding.

Asked by 1997589 9 years ago | last reply 8 years ago


Dual energy generation with magnetic Seesaw system and gravity with the help of 3 volt toy motor

This technology is based on  a Seesaw system and magnetic repelling principle Linear motion  .We can generate electricity with very little force with the help of this technology.This will be a radical step in the field of energy generation. In this technology there will be a balance system and two heavy weight magnets(high strength NEODYMIUM MAGNETS) will be attached with each side of this balance system as per diagram. As per diagram there will be two moving weights and these moving weights will move on tracks.These tracks will be fixed at the angle of 8 to 10 degree. Two magnets will be attached on the front side of these moving weights and these magnets will have similar polarity with the magnets of balance system. These moving weights will be attached with two gear boxes and these gear boxes will be attached with two generators. HOW THIS TECH WILL WORK? When one side heavy weight magnet of balance system will be pressed with the help of any kind of external force then this side will come down and repel its side moving weight due to equal polarity of magnets.due to repelling the moving weight will move forward .but when the heavy weight magnet will move upward then this moving weight will move backward due to gravity to get its position back. in this way this moving weight will work to run a gear box and this gear box will work to start a generator to generate energy. This balance system will also work to pass through their side copper coil due to linear movement and in this way this technology will generate Dual energy. WE will take very high strength NEODYMIUM magnets  for balance system. I would like to insist on some following points (1) The balance system will be attached with 'L' form crank with external PRESSING source. (2) The moving weights will also be attached with 'L' form crank with gear boxes. (3) Each side magnet of balance system will work one by one .When one side magnet will come down the another side magnet will move up .These magnets will come down and move up one by one to repel their side moving weight. (4) We can take as much weight as we can of these magnets of balance system .(500 kilogram to 1000 Kilogram or more) to pass through the heavy coils having 100000 turns or more.  (5) External source of pressing this balance system could be anything such as pressing with foot  or solar cell. WE WILL NEED ONLY 3 VOLT EXTERNAL ENERGY TO PRESS THIS BALANCE SYSTEM  AND GENERATE MORE AND MORE ENERGY.

Posted by vikram_gupta11 2 years ago


Ideas for a counter balance

I am looking at ways to replace the weight of the batteries in a cordless drill (the batteries leaked, and they are not sold to my knowledge anywhere in THIS country); after wiring in a power supply (making it corded).   Any suggestions?   I have thought of a few but nothing seems overly viable at the moment.

Posted by Goodhart 7 years ago | last reply 7 years ago


(newsletter) Wooly Willy Table, Self-Balancing Skateboard, Platypus Inaction Figure

  Wooly Willy Table Dead Computer Contest Winners Platypus Inaction Figure Sew Warm Contest Winners Coffee Can Alarm Clock Self-Balancing Skateboard Grout Portrait Busts Paracord Playing Card Safe Explosion Box Rear Pocket Camera Mount View Radioactive Particle Vapor Color Changing Deck Lights Ultimate Phillips Guide Cup Prank Instructables.com - 82 2nd St. - San Francisco, CA

Posted by fungus amungus 8 years ago


Reef Globes, worlds smallest balanced reef aquarium

These are aged systems that keep myriad coral reef organisms alive using a delicate balance of natural materials and very reduced manmade gear. They are like ecospheres, but to the 20th power. Compared to an advanced reef aquarium they are just as stable due to design features, and they bring marine science study into the home in a practical manner. There are no others in the world like these designs and they are easy to build but expensive to build as well. I hope you enjoy my invention now posted as an instructible http://www.youtube.com/watch?v=_XOsitYhihc

Posted by brandon429 9 years ago | last reply 7 years ago


I Challenge You: Cable Driver

The new challenge!A cable driver!It's relatively simple idea, but balancing it will be hard!Tip:Use an engine or else it would just roll of the cable.Use weights for balancing.Best of luck, dudes!Link to the group.

Posted by Skreetsha 10 years ago | last reply 9 years ago


Having problems with Arduino code for Self Balancing Robot

Whenever I try to Compile this code https://github.com/vu2aeo/Arduino/blob/master/BalanceBot2_PID_Control/BalanceBot2_PID_Control.ino arduino gives me this error E:\Balance Bot\BalanceBot2_PID_Control\BalanceBot2_PID_Control.ino: In function 'void setup()': BalanceBot2_PID_Control:38: error: 'class MPU6050' has no member named 'Initialise'    sensor1.Initialise();            ^ E:\Balance Bot\BalanceBot2_PID_Control\BalanceBot2_PID_Control.ino: In function 'void loop()': BalanceBot2_PID_Control:43: error: 'class MPU6050' has no member named 'Update'    sensor1.Update(); Now when I also include this library which contains GetGyroReading, GetAccelerometerReading etc variable it again give me the same error. I am pretty new to arduino programming and is trying out some PID controls. my_mpu_library: https://github.com/vu2aeo/Ard-Class/blob/master/MY_MPU_6050/my_mpu_6050.h BOmotorpair library: https://github.com/vu2aeo/Ard-Class/blob/master/BOMotorPair/bomotorpair.h Project I am following https://bayesianadventures.wordpress.com/2013/10/27/balance-good-everything-good/comment-page-1/#comment-814

Asked by DanishA22 2 years ago | last reply 2 years ago


Sulfur-free black powder equation and burning temperature? Answered

I am trying to calculate the pressure that builds up in a closed vessel containing deflagrating gunpowder.  The web gave me several conflicting equations for 70% KNO3 : 30% charcoal gunpowder: 1.  6 KNO3 + C8H4O --> 3 K2CO3 + 8 CO + 4 H2O + 3 N2 Oxygen is unbalanced. 2.  6 KNO3 + C7H8O --> 3 K2CO3 + 4 CO2 + 2 H2O + 3 N2 Hydrogen is unbalanced. 3.  6 KNO3 + C7H4O --> 3 K2CO3 + CO2 + 6 CO + 2 H2O + 3 N2 Carbon is unbalanced. None of these equations have 70:30 by weight saltpeter to charcoal, and none is balanced.  To fix the weight: it is possible that the charcoal is not to be completely dry, and that there are a few water molecules hiding out, but there would have to be 8:1 water to charcoal molecules for equations 1 and 2, and 9:1 for equation 3.  To maybe fix the balance and masses: if the charcoals had a coefficient of 2, equation 1 would need 1:2 water to charcoal, equation 2 would need 2:2, and 3 would need 3:2.  This is assuming that the saltpeter is carrying no water. Potential equations with 2 moles charcoal and carrying water to achieve the right weight ratios and balances are following: (I offer two potential equations each because I lack a reactivity series table and know not how extra atoms would come together.  Please alert me if the following equations are just B.S.) 4. a.  6 KNO3 + 2 C8H4O . H2O --> 3 K2CO3 + 3 N2 + 11 CO + 4 H2 + H2O + 2 C ? 4. b.  6 KNO3 + 2 C8H4O . H2O --> 3 K2CO3 + 3 N2 + 7 CO + 5 H2O + 6 C ? Excess carbon would take oxygen from water, or stay carbon, or would the charcoal not be all used up?  I assume that the reactant water molecules will remain unchanged. 5. a.  6 KNO3 + 2 C7H8O . 2H2O --> 3 K2CO3 + 3 N2 + 11 CO + 8 H2 + 2 H2O ? 5. b.  6 KNO3 + 2 C7H8O . 2H2O --> 3 K2CO3 + 3 N2 + 10 H2O + 3 CO + 8 C ? Same problem as #4 6. a.  6 KNO3 + 2 C7H4O . 3H2O --> 3 K2CO3 + 3 N2 + 11 CO + 4 H2 + 3 H2O ? 6. b.  6 KNO3 + 2 C7H4O . 3H2O --> 3 K2CO3 + 3 N2 + 3 CO + 7 H2O + 8 C ? Same problem as #4 If anyone can confirm any of these equations or provide a more accurate one, please do.  Also, anyone who can tell me the burning temperature of the correct equation, please do.

Asked by tincanz 6 years ago | last reply 6 years ago


An Instructable in New Scientist!

Instructables member XenonJohn has had his Self-Balancing Skateboard featured on New Scientist TV, using video taken at the UK Maker Faire. I had the pleasure of meeting John at the Faire, and I can safely say that this world needs more like him. Kudos, John.

Posted by Kiteman 7 years ago | last reply 7 years ago


Self-balancing motor sizing and drivers?

I'm starting to plan a self-balancing unicycle and I notice several people that have built them are using 450-500W motors. I'd like to use something a bit more robust, like 750W @ 24v, due to terrain. I'm wondering if that's too much and if the guys that are using 500W are happy with the results? Has anybody tracked their current (amps) usage? My guess is that unless you're going full speed and uphill you'll rarely hit full wattage on your motor except for temporary instances. One of the challenges I'm finding is that there are motor drivers up to 25A at 24v or 36v that can handle a bit of surge, but then it takes a huge leap to 160A and 400A surge. I don't think I need something that large and expensive, but my electric motor experience is limited. Could some of you more experienced guys chime in with a bit of advice? Thanks, Gyv

Posted by Gyvven 6 years ago


Robot that walks like a human

Watch a video of a robot that walks like humans and balances itself to avoid falling.

Posted by blkhawk 5 years ago | last reply 5 years ago



Upgrading the self balancing skateboard by xenon john to work like z board?

Hey Frnds! I saw this instructable. And i want to make an upgraded version of it. I want to make it work like the zboard but without weight sensing. But i know very little about arduino programming. Can anyone plz help me. Is there a way to recognize when i shift my weight forward or backward? (Using the accelerometer i think). We can then fix a notched disk on the front portion of the board, beneath which there will be a potentiometer. When we will put our heel on the disk and rotate it, the board will turn accordingly. Can anyone please help me with this idea. I really wanna learn. Plz reply fast if u know anything. Thanks in advance.

Asked by 1101Snehil 3 years ago | last reply 3 years ago


How can I make an electronic balance that would output a voltage and light a series of LEDs?

The display will be used to represent weight (weight would be between 1 and 100 lbs) and will be used in a competition in which coins will be added into buckets setting on the scales or load cell platforms at varying rates. I will make two identical units and would like for the displays to remain active throughout the competition which should last less than 20 minutes. The purpose will be to represent which bucket has the most weight at any given moment and the accuracy only needs to be the same for each device. In other words, if the buckets were switched, the results would be repeatable (accurate within one LED (or perhaps a better light arrangement may be suggested)). Thank you

Asked by benglish777 8 years ago | last reply 8 years ago


Can I use the same resistors for current shunt AND transistor balancing?

In my pursuit for a LPSU design, to get more HFe gain, higher current capability, decrease Vce dropout, improve thermals, etc. I would use 2 (or more) pass transistors. This requires load balancing resistors, so I thought I'd get clever and use these balancing resistors to also measure current for my current limiting capability! See pictures and explanation below. IMPORTANT: The second schematic implys the use of 100R resistors, that is a mistake, they are supposed to be 0.1 ohm, or around that figure. Details: The first picture below is a simplified diagram of how I currently have current feedback implemented. I generate a fixed (user adjustable) voltage across a 500R resistor via a current sink and an error amp (currently LM358) drives output pass transistor(s). Because the op amp drives the output to ensure the inputs are the same, the output current can be precisely regulated. It maintains a precise voltage differential across the shunt by means of the pass transistor. I don't want to take the naive approach with multiple resistances in the path of the current flow from the unregulated supply to the output, for obvious reasons. I could instead just measure the Vdrop on one of these balancing resistors, but that assumes that the current through those resistors is identical, which is not the case. So instead, what if I expand a bit on the first schematic, leading to the last schematic? Would that work? I want to understand the mathematical analysis behind it to prove it does work. 

Asked by -max- 1 year ago | last reply 1 year ago


How to calculate using counter balance to lift a mass from undersea to above seawater. Answered

A huge beam planted into sea and the height 15meter above seawater. Total length 30m. Using pulley system, both side left and right hung 2 equal weight drum. The whole picture should be similar to Elevator methodQuestion: How counterbalance and pulley system calculation will be? Do I need to consider buoyancy formula and also F=ma.What kind of formula do I have to consider?

Asked by zoohunter 9 years ago | last reply 9 years ago


12v 18650 battery with bms but no balance. Can we use 3.7v output from it for powering bluetooth module directly?

I am trying to make Boombox Speaker. The amplifier is 12v and the bluetooth module is 3-5v input. I have a single 12v BMS module, ofcourse with 4.2v, 8.4v, 12.6v dividers. Now suppose I power the amplifier with total output, it works fine. But can I take the output of one single divider i.e. 0-4.2v for the bluetooth module sepeartely and keep using the 12v for the amplifier?

Asked by SalilG2 9 months ago


Balance charging li-ion ?

So I bought a replacement battery for a project. I tore down all the casing and got 6 18650. But I want to charge those batteries using the same protection circuit that was inside the casing using laptop battery adapter. Can someone tell me what are the terminal should i connect and how i connect? So far i found using multimeter that P-, P- is negative and P+, P+ is positive and there is no switch. The voltage can be checked directly. The circuit and battery is from Dell 1525.

Asked by SaurIMX 4 years ago | last reply 4 years ago


wiimote or a ps3 controler controling a self balancing skateboard...

I am looking at making a self balancing skateboard... i am having trouable finding step by step instructions for the ones that use the sensors... so i was thinking that if i could use a wiimote or a ps3 controler becuase everyone knows that the wiimote has gyroscopic sensors in it and the ps3 controller has a sixaxis thingie in it...(i know that thingie isnt the correct term for it...) so that gave me a good idea instead of piecing together gyrocopic sensors and many other things than why not just use a controller to control it... and if anyone knows another way to control a self-balancing skateboard... or a way to hook them up to the board... and i am not very good at programing so... if you could just send me a message of the programing to use the controlers as a controller than that would be great... if anyone thinks that this way is just to much harder than it seems than please tell me... thank you, Girrrrrrr2

Posted by girrrrrrr2 11 years ago | last reply 9 years ago


Where is the center of gravity usually found in a sword? Answered

I'm atempting to construct a sword, and even though its mostly for show, i want to get the weight and balance right.

Asked by The Ideanator 8 years ago | last reply 8 years ago