I am trying to create and verify a few devices and I cann't seem to get them to work at all.
First i wanted to make a simple microphone using the principle of induction.
So I have a magnet , some copper wire , a computer audio input connector , and a paper cup. I thought if you tape the magnet into the cup and poke a hole in the cup with the copper wires comeing into the cup. When you shout it moves the cup which vibrates the wire and should induce a current in the wire.
My problem is I am plugging this into an audio port of a computer.
And I cann't hear my voice at all. What voltage ranges does a typical sound card in a computer use? And what am I doing wrong?
Note I really don't care about the quality. Just want to see it work.
Don't really want to use anything more then the bare minimum for supplies in building the mic.
Second problem is I am trying to verify the law of induction by creating a magnet out of a screw. I wrap the wire around the screw about 10 times and plug the wire ends into a 9 volt battery. But I cann't see any noticable magnetic field induced. I tried picking up paper clips but no luck.
What could be the problem with this. How many times should I wrap the wire around the screw so I can see a noticable magnetic field.
Note I have seen a picture of somebody doing it with less then a nine volt battery on youtube.
Also what is the difference in using radio shacks insulated copper wire
As opposed to using radio shacks magnetic wire which is not insulated?
And when and why do you use insulated wire as opposed to non-insulated wire. Is it better to wrap insulated wire around the screw or not?
Thanks for any help.
First i wanted to make a simple microphone using the principle of induction.
So I have a magnet , some copper wire , a computer audio input connector , and a paper cup. I thought if you tape the magnet into the cup and poke a hole in the cup with the copper wires comeing into the cup. When you shout it moves the cup which vibrates the wire and should induce a current in the wire.
My problem is I am plugging this into an audio port of a computer.
And I cann't hear my voice at all. What voltage ranges does a typical sound card in a computer use? And what am I doing wrong?
Note I really don't care about the quality. Just want to see it work.
Don't really want to use anything more then the bare minimum for supplies in building the mic.
Second problem is I am trying to verify the law of induction by creating a magnet out of a screw. I wrap the wire around the screw about 10 times and plug the wire ends into a 9 volt battery. But I cann't see any noticable magnetic field induced. I tried picking up paper clips but no luck.
What could be the problem with this. How many times should I wrap the wire around the screw so I can see a noticable magnetic field.
Note I have seen a picture of somebody doing it with less then a nine volt battery on youtube.
Also what is the difference in using radio shacks insulated copper wire
As opposed to using radio shacks magnetic wire which is not insulated?
And when and why do you use insulated wire as opposed to non-insulated wire. Is it better to wrap insulated wire around the screw or not?
Thanks for any help.