how to build remote controlled car from scrap material??
139383
Motors can be scavenged from used floppy drives, you may want to buy/build the control circuitry yourself, if not rip it off a old RC toy.
988763
There are lots of robotic-related sites. If you aren't an ace at C or assembly programming, you might want to stick with the Basic Stamp. Parallax (http://www.parallax.com) makes kits and also makes the plans available for free and has a lot of science project/educational material for free. The Basic Stamp is easy to use even for a novice.\n\nIf you want something more sophisticated, look at http://www.robotstore.com for more ideas. \n\nA web search on  ' "Basic Stamp" robot' would also show many pages of people doing similar things.
361899
Buy a kit.  They sell the solid fuel "engines" at any hobby store.  If you're under 18 you might need an adult's permission, and launch responsibly.\n\nOtherwise, it's loads of fun.
1044288
You can make any simple machine having fulcrum, load and effort or u can even make a pulley.(These r very cheap and easy to make)\n\nFor ur project on universe u can get information from any encyclopedia or search in net.
822324
well, i cant really explain it, but you can use rubber band or a mousetrap to power the car. if u google "mousetrap car" or "rubber band powered car," you'll find diagrams and steps on how to make it.
117736
Materials needed:\n     1 lemon\n     1 paper clip\n     1 copper wire (18 guage works well)\n\nProcedure:\n     1.   Straighten out the wire of the paper clip.\n\n     2.   Cut a piece of copper wire roughly the same length\n          as the paper clip.  Remove the insulation.\n\n     3.   Push the paper clip and the copper wire into the \n  lemon.  Keep the wires as close together as you\n          can, but don't let them touch.\n\n     4.   The fruit battery is now ready for use.  If you\n          have a voltmeter you can test how many volts\n          the battery produces.  You can also taste the\n          two wires and feel a tingle in your tongue.\n          (Note: you should only do this for very low\n          voltages such as those given off by lemons.)\n\nHow it works:\nAcids, such as the citric acid in lemons, tend to produce chemical substances called ions. These ions either have too many electrons (negative) or not enough (positive) Metals tend to attact these ions. \n\nOne type of metal will attract the negative ions and the other will attract the positive ions. This causes the two metals to have different electrical charges and electricity will flow from one to the other whenever you attach the battery to something like a radio (or your tongue). \n\nIncidently, the flow of electricity will eventually neutralize the ions. When this happens the battery is dead. \nand also see:
253421
I think Radio Shack has a kit that you make a simple radio i think  it's called a crystal radio. EAsy to build and good project.
1001647
Make a box of strong glass or reinforced cardboard. Put the mobile inside it and use a vacuum cleaner to suck the air out of the box. Make it airtight. Thats it.
546686
Check out the Edmund Scientifics website.  They have tons of robot kits, parts, etc.   Better yet, order their printed catalog.  \n\nhttp://scientificsonline.com/
683590
hey can you explain more on how the self propel car with only rubber bands works, explain how you attach it to the car and go step by step please if you will my email is inspironb130@yahoo.com
1113004
3 easy steps:\n - Build a car.\n - Power it with a rubber band.\n - Wind it up and let it run.\n\n\nGood Luck!
731290
go to the manufacturers website and download it to the desktop and burn it for future use
29970
Your best bet would be to purchase a robot kit somewhere. It would be far too difficult to make one yourself unless you had a thorough understanding of programming chips.\n\nAlthough if you want a very simple robot, try this: Find a switch, some wires, a battery, and a DC motor. Attatch the wires to the motor, and then to the switch. Place the battery in the circuit and then press the switch, and the motor will turn on. This is the basic principle of a robot, you can add multiple motors, timed switches, and eventually programmed chips to add more versatility and usefullness to the robot.
788031
take it to your local hazardis waste material center, they should know what to do with it:)
987856
Pick it and fling it on passing cars.  When you get really good you will be able to fling it inside an open window.  :)
223669
best site for help.\n\nhttp://www.scioly.org/obb/index.php\n\nLook for posts about the "scrambler car"\n\nThese will be advanced designs for competition, but you will get the general idea of how to build one.
205891
Oh, this one is easy. \n\nGo out into space (probably just inside the asteroid belt), and build a 30 kilometer long linear accelerator made out of low impedance electromagnets. Attach it to a huge solar collector, a huge capacitor bank, and a transformer to transform whatever voltage the collector recieves voltage at, to just below the breakdown voltage of your capacitor or electromagnets (whichever is lower).\n\nAssemble a big paramagnetic rod out of something nice and massive (like iron), and coat it with a few thousand tons of lithium, or something similar in reactivity. The entire projectile should mass no less than ten thousand tons. \n\nCharge up your capacitor bank, point the accelerator at the Earth, and tell them to turn over control of all governments to you, or you're going to hit the Earth with a very large plasma projectile traveling at a very high rate of speed...