concrete_hed

My phone has an application which allows me to use a bluetooth keyboard to input data to it. The only thing is that i dont have a bluetooth keyboard, i have a normal keyboard and a usb bluetooth dongle. Does anyone know of any windows pc programs that allow me to use my pc keyboard with my bluetooth dongle to act just like a bluetooth keyboard. So I can pair my pc and phone together and whatever i type on my keyboard, will be processed by the computer and the output will be sent as a bluetooth signal which will then be recognized by the phone as input. This way i can do some programming using Python for nokia S60 without having to scroll through a list of common symbols used in programming, with my phone keypad. It would be much easier that way. Any ideas?

Ok, thanks for your contribution to my question. I'll try the resistor thing, and if it blows up then... well, that'll be one lesson learnt the hard way.

The batteries are rated 1.2V, 700mah and they are Nimh type. The resistor idea might work, but then I had another idea. What if I could use one of the charging bays to charge 2 batteries at a time by placing them parellel to each other? Or what if I charge 2 of the batteries and then place a fully charged battery and an empty battery into the charger, so one of the batteries would be charged twice. Would this cause an overcharge? All i know about the charger is that It takes 16 hours to charge the batteries. I know this is a problem that is easily resolved, but I like to do things the hard way.

I have an appliance that uses 3 AAA batteries, and I have a charger that can only charge 2 or 4 AAA batteries at a time. I need a way of charging all 3 batteries at once using the charger, without overcharging or blowing something up. I could just buy another rechargeable battery and then charge all 4 of them, but i dont want to. I was thinking of maybe shoving something between the contacts of where the missing battery should go so it is a complete circuit, but that will probly blow something up, or overcharge the other batteries. Any ideas anyone?

I dont see why everyone says microsoft is so dumb. I have been using it all my life, it hardly ever crashes, when it does crash its because my computer is so slow. I have used IE 7 and it works fine, just like all the other previous versions. I visit many different websites every day and I have never had a virus, I have had a couple of small spyware but nothing major like any password sniffers. The only firewall I use is microsoft and I have never had any problems with it. I think it all started when one person said they didnt like microsoft, then everyone else just started to say it so they would sound smart.

I just read http://hytechapps.com/aquygen/international_journal.pdf. It is a scientific analysis of the HHO gas basically. If your smart and you understand lots of intelligent words then u might understand it more than me, but from what I gathered, it involves magnets, electricity (but not as much electricity as normal electrolysis of water uses) and something about reversing the magnetic polarisation on something. If you want to read it yourself, read the first 2 pages and the last 3 or 4, you might be able to understand it more than me.

You could always try electrolysis or salt water. This will give you chlorine gas and hydrogen gas. Then you can breathe the chlorine gas in and you will die, and if you collect enough hydrogen gas and ignite it you will also die.

Ok, i am dealing with UHF around 470 - 477 mhz. The transmitters are 0.5watt and i would like to get that up to about 1 - 2 watt. What is the easiest way possible to do this. Im thinking something along the lines of a repeater (recieves a signal from a selected band and them amplifies it), is it possible to make one using a fixed crystal clock oscillator?

Maybe someones after you. I would lay low if i were you.

Yes i do have an oscillascope program, i have a normal computer microphone put it doesnt pick up anything when i hold it right near the smoke alarm. I do just happen to have a pair of ultrasonic reciever things that are hooked up to my "RealRobots" robot. All it is, is a small speaker about 5mm diameter. I was thinking that i could make a microphone from these using an audio transformer. Can anyone tell me if this would work?

Just recently my dog has been acting strangely and i discovered that it was the smoke alarm that was upsetting her. Sometimes i hear the smoke alarm making all sorts of strange tones. I think that the smokealarm is making a tone that is above humans hearing range but not that of a dogs. I have tested my hearing and i can hear up to 18khz only just. I tried replacing the battery of the alarm but it still upsets my dog. So clearly the smokealarm is stuffed but i want to figure out whats making my dog all mental. Does anyone know how i can make a microphone that will be able to pick up 18khz and above tones? Is it possible to use this microphone with my computer sound card to record the noise?

Yes that has helped a bit, i knew basically what it does but you have given me more info. Thanks. one more question, if i were to type "arp -s 192.168.0.7 00-aa-00-62-c6-09" what would that do?

Another way to check if any unwanted programs are executed on startup is to check the registry folder HKEY_Local_Machine (or HKEY_CURRENT_USER)\Microsoft\Windows\Current Version\Run. If you see any programs you shouldnt see then i sugest you remove the key. Playing with the registry can be dangerous if you dont know what your doing but no matter what you delete in the RUN folder it wont screw up your computer, the worst thing that could happen is your sound card or graphics card drivers wont load up, if you delete something, write it down so you can restore it if needed. Also check the startup folder in the startmenu for programs also

I recently discovered ARP.exe (windows version). I have heard that using arp you can route all data coming in and out of your computer, this is how many hackers can learn usernames and passwords and listen in on your instant messaging conversations. When i run "arp -a" it returns: Interface: 192.168.0.5 ---- 0x10003 Internet Address Physical Address Type 192.168.0.1 00-0f-b5-7c-7f-20 dynamic My computer(192.168.0.5) is on a local area network and 192.168.0.1 is my default gateway. Can someone please explain to me what the information above means? Does it mean that all information entering and leaving my computer goes through 192.168.0.1? Is the physical address shown above my physical address or 192.168.0.1's physical address? Can i change this to another address? What can i do with arp.exe? If someone could pleas explain this to me without using too much technical terms that would be great. thanks

if you want to find out more about coils then read the howstuffworks article at: http://electronics.howstuffworks.com/inductor.htm

first of all the big green thing is a relay. when current is passed through it it creates an electromagnetic switch to be switched on, when the current is removed then the switch will go back to its original position. The thing right next to the spark gap is an inductor (coil). This creates an electromagnetic field as current is applied to it (when the relay is switched on), when the current is released (relay is switched off), the electromagnetic field collapses all at once, as the relay switch has been turned off the electrons will have no where to go so they will jump accross the spark gap. Some of the electrons may jump accross the gap in the relay, but since the spark gap is closer, most of them will go accross there. This one in this circuit is 10mh, i dont know how many coils that one is but there are other sites on the internet that u can use to calculate the amount of coils and guage of wire to use for building coils. It doesnt have to be exactly 10mh, could be more, could be less. The 100ohm resistor is used to stop the circuit blowing up as soon as the relay is switched on. If you ever try connecting a 12volt battery negative and positive terminals together without an energy user inbetween, it will make lots of sparks and the battery heats up and could be damaged. Using ohms law i calculated that with 12 volts of power and 100 ohms resistance this should create a current flow of 0.12 amps which should be a safe current. Yes that thing in the circle is the capacitor. And just ignore the red and blue things, they are just part of the simulation program i used to monitor the voltage and stuff. although the circuit says that it creates 120 000 000 000 000 000volts, i dont think that the simulator is correct because that many volts is FREAKIN MASSIVE, even tesla coils and tazers arent that high voltage. If you want to try Crocodile Clips you may like to download it, its fun and it might help you. If you are going to build one of these dont blame me if it doesnt work, im not a genius you may want to ask someone else on what they think. And make sure that you use a relay that will switch over with around 9 - 12 volts, otherwise it wont work at all.

Yes but im talking about the direction that the satellite is pointing, eg the solar panels have to be pointed towards the light source.

How do satellites stay pointing in the correct position? In movies, it seems as if a small amount of gas is released in one direction to move the satellite in the other direction. Could you build an engine to work in space that uses compressed air?

As i said earlier it is probly hard to picture what im talking about without showing u a diagram. Basically, the capacitor is used when the power is turned on by the infrared, it turns on the relay and at the same time the capacitor is charing, it will charge for about a second (depending on size of capacitor) and then when it is fully charged it will stop the current flowing to the relay therefore the relay will switch back to its original position. The reason i have designed it like this is because the spark only happens when the powersource is disconnected from the inductor, and this was the easiet way i could think of without using more complicated circuits. You could just use a normal switch instead of the relay, you would have to switch it on and then off quickly to get the spark, but that wouldnt be remote. this way all you have to do is press a button to turn the relay on, and then the relay will switch itself off automatically, giving you a spark. And the other reason why i used a relay was because that relays can handle high voltages and large currents that you would get from the spark, transistors cannot. Ok i finally figured out how to attach images. If you can understand the circuit below then good on ya because im not very good at designing stuff. When i run it through the simulator, the spark gap and the relay blow up. But when i look at the stats of the process afterwards, it tells me that the spark gap reached a voltage of 1.2e+017volts. My guessing tells me that the relay should still be useable after a shot, as long as you dont use too much power. If you can think of any ways to improve me circuit then please help me.

what are thermoelectric devices? can u give me an example?

I know this post is old but... One word. ArtMoney. Its a program that lets you edit memory addresses in your computer to change their value. Eg, one memory address could contain the amount of health you have in the game, you can simply change this value and then it changes it in the game. This can be done on pretty much any program, but some online games such as runescape dont store the information about the player on your computer, it stores it on the RS server so there is no way to change it. A little trick u might like to know, i used to play RS and i used to fool people into thinking i had millions of dollars when i had hardly any. All i did was withdraw all the money i had, use artmoney to search for that value and then change it. It works until you go to spend some money and then it just returns to its original value

If you have seen the matrix movies, you will know that the machines use the humans as batteries because the humans scorched the sky so no sunlight gets through. Anyway, at some point in the first film morpheus says that a human has more energy than a 120volt battery and 120,000 btu's of heat energy. So that got me thinking, would it be possible to run electronic devices of human power (im not talking about running on a hamster wheel to generate electricity)? How can 120,000btu's of heat energy given off from a human be used to generate electricity? PS. im not sure exactly if it was 120,000 btu's exactly.

As i said earlier im not entirely sure if my idea will work, but it does work when i run it through Crocodile Clips (an electric circuit simulator). For the circuit i used in the simulation: 1000uF capacitor a push button swith 9 volt battery a relay (the relay will have to be able to swith over with 9volts) that is just for the circuit to turn the relay on to allow a larger current to pass through the relay. For the ignition circuit i used 100ohm resistor (i would recomend building your own resistor so it is able to handle the current) 10mH inductor 12 volt battery If you live in New Zealand like me then you will be able to everything you need from DickSmith, if not, there ought to be an electronics shop near you that sells these components. The most expensive parts would be the relay and the battery, you would probably have to make your own inductor out of magnet wire which could also be costly depending on how many turns and the guage of the wire u want. The rest of the stuff (switches, capacitors) can be bought for less than $1. Over all it would cost $25 (NZD) for the ignition circuit (relay, swith, capacitor, inductor, resistor, wire) (excluding batteries). Again i say, im no genius, im still learning how to do this stuff. If you would like to see a diagram of the circuit, please email concrete_hed@hotmail.com.

For a remote control, the easiest way would to use an infrared diode and receiver. The small current that will pass through the reciever will be enough to turn a NPN transistor on that will then turn a small relay on, there will be a capacitor in series with the relay so that the relay will swith off shortly after it is switched on. When the relay is switched on it will allow a very large current to travel from a charged capacitor (or another power source) to a coil, and then when that capacitor is automatically switched off it will cause a small spark to run accross the spark gap. This is my theory anyway, there are some limitations such as the infrared reciever which may be affected by the sun and other hot objects. And my spark gap, the spark may run between the tiny terminals inside the relay instead of where i want it to go. Im not entirely sure if my idea would work but i have tried running it through some electronic circuit simulators and it seams to work fine. But without me showing a diagram it is probly difficult to picture what i just explained. Im not sure if that helps but im still learning too

so do u know any circuits schemats or where i can get any circuit schemats for this kind of pre-amp your talking about?