I have two 9V batteries, some wire and some wood.
214283
You need something iron (like a nail) wrap the wire around to make an electromagnet. You could wrap the wood lengthways with some wire and then wrap another wire shortways around the assembly and hook to the battery but an iron core is much better. \n http://www.energyquest.ca.gov/projects/electromagnet.html\nBTW You do have most of the parts to make a simple radio receiver also.
139876
try out an electrolysis experiment with the battery u wil get to know abt the charges of the battery the place where the metal move is the negative charged one and where the non metal moves tht is the positive terminal
370427
Unless you are playing with low voltage, please find some other project. 120 Volt or 220 volt is very dangerous.\n\nAny way you will need all the components in same voltage I say get every thing in under 9 volts to make things easy, they must operate in 6 to 8 volt range so you will have voltage to spare. You may not be able to find them readily.\n\nThis is how it works.\n\nClapping sound is picked up by micro phone.\n\nThis produces a signal, that will close an open circuit on a lamp(or any thing that you need to turn on like a bell).\n\nTo make a package, like the one you buy in the store, it took quite a few years to perfect it, and they had experts working on it.. \n\n1.  9 volt battery. few to operate the systems.\n2.  red and black wire.\n3.  9 volt lamp.\n4.   6 volt Micro phone.\n5.   Sound activated switch, 6 volt \n6.   Tapes electrical.\n7.    cardboard to mount every thing.\n8.    cutting tool to make connections.\n9.    Solder iron and silver solder wire.\n10.   Different types of connectors.\n11.   Glue to put components on the board. \n\nEdmund-scientific.com may have a kit, it is on Internet.\n\nBuy the kit and assemble it.
603492
The batteries are still workin
119349
I would probably use Light Emiting Diodes connected to a low voltage dc source using very small gauge twin-lead wire.
85807
V = Er = 3E6 x 0,30 = 9E5 volt = 900 kV
33252
Try heat. (Or wire strippers if it is infact a wire.)
156011
Very low, as most of the funtions are controlled by minute electrical impulses, you dont want to be messing around with anything stronger that a AA battery.
494225
You sure do need help....\nWhen you were cutting the LED off, you created a short circuit, first with the wire cutter (or whatever you were using), and then you most likely allowed the 2 lose wires to touch each other (or both touch a common metallic item).\nYour battery is now kaput !  They don't like short circuits, you know....
220581
Buy a vibrator and a bunch of batteries.
234498
Something else in the pocket made contact with both terminals, causing the battery to pass current and generating heat.  I did this once by tossing a 9V that I thought was discharged into my pants pocket where I have my office keys.  The keys completed the circuit from the positive to the negative terminals, and I shortly noticed the heat.
374127
Change your CMOS Battery.
306736
they are working on this, it is a sheet the size of a peice of paper (roughly) but thicker and it uses magnetic induction to recharge batteries without wires
46650
It is used to generate electricity.
108843
That its a crude battery and you better dont put your ruddy finger inside :p
80077
BATTERY AND CRAP???? lolz...wat exactly were u tryin to say!??! guy said he uses AC power not BATTERY..'nd i....errrrrm.....ammm..i dunno wat to say...guys help him out.... yo man..tc...!!
437409
You might start by contacting the power company.  If you have concerns about eletromagnetic interference, they should be willing to help you.