More detailed descriptions coming soon!!!!
The title of the post is- 'Our invention has been approved'
Have a look at it!!! (quite interesting- will help millions of unorganised people)
agag
Saturday, November 8, 2008
Our first outing to research and gather what we will need for our invention- (Success!!!)
Today we went to dick smith and soon found that they had very little range of anything and that they are gradually ordering less and less-they are starting to stop being an electronic dealer. They recommended Jaycar, when we went there we found that:
- The staff are very knowledgeable and helpful
- They have anything and everything-as stated under their name on the front sign- No. 1 for electronics and kits!!!!-we agree with this totally!!!!
- Dont bother with dick smith-they have hardly anything
- Use Jaycar!!!-They are great!!!!
agag
So....Today we bought 1 12 volt motor (it can turn around two kilos and has a rpm of 1.1-we are hoping the weight of our invention is not to heavy so the motor can turn the main turning structure), a pack of crocodile clips, 2 straight battery packs (I had the right ones at home but they weren't as good to fit onto the dowel- the ones we bought are straighter and will work better when we have to stick the battery pack on), 4 lights and their holders, some cable ties to tie all if the wires together at the end and finally a switch to control everything.
As I am writing this I have just realized that we only bought 1 switch so I do no know how we are going to turn the lights off and on- we are controlling 2 lights on a battery pack, overall for the lights there are 4 lights on 2 battery packs.As far as we are going we have done well compared to what we have done in class- nothing.
Our only concerns are that the motor may not be strong enough and that I am not going to get enough done before we start work in class- I have quite a lot of work to do, thus i am afraid that when we are working in class every single day for most of the day we are not going to have anything to do. Although we will probably play with the motor and lights that we bought or we will have to write about our invention, what it does how it'll make change and how and, why it will help peoples requirements.
Posted by Jordan.
trial and error
Today me and jordan went to dicksmith unsuccesfully and then went to Jcar (not correct speeling) to buy materials for the invention. We bought 4 lights and a powerfull motor.
And geuss what happend?
the first thing was go power crazy and explode the lights with to much power
so now i'[m going to buy about 6 more (a few just in case)
And geuss what happend?
the first thing was go power crazy and explode the lights with to much power
so now i'[m going to buy about 6 more (a few just in case)
THEY ARE SUPER CHEAP!
and close to SUPER CHEAP AUTO
funny that....
Wednesday, November 5, 2008
Facts about magnets
This is most of my fact page (it may seem long but it is only 2 word document pages!!!!)
Magnets do the following things:
Attract certain materials - such as iron, nickel, cobalt, certain steels and other alloys;
Exert an attractive or repulsive force on other magnets (opposite poles attract, like poles repel);
Have an effect on electrical conductors when the magnet and conductor are moving in relation to each other;
Have an effect on the path taken by electrically charged particles traveling in free space.
Based on these effects, magnets transform energy from one form to another, without any permanent loss of their own energy. Examples of magnet functions are:
A. Mechanical to mechanical - such as attraction and repulsion.
B. Mechanical to electrical - such as generators and microphones.
C. Electrical to mechanical - such as motors, loudspeakers, charged particle deflection.
D. Mechanical to heat - such as eddy current and hysteresis torque devices.
E. Special effects - such as magneto-resistance, Hall effect devices, and magnetic resonance.
What are permanent magnets made of?
Modern permanent magnets are made of special alloys that have been found through research to create increasingly better magnets. The most common families of magnet materials today are ones made out of Aluminum-Nickel-Cobalt (Alnicos), Strontium-Iron (Ferrites, also known as Ceramics), Neodymium-Iron-Boron (Neo magnets, sometimes referred to as "super magnets"), and Samarium-Cobalt. (The Samarium-Cobalt and Neodymium-Iron-Boron families are collectively known as the Rare Earths.)
How are magnets made?
Modern magnet materials are made through casting, pressing and sintering, compression bonding, injection molding, extruding, or calendering processes.
How permanent is a magnet's strength?
If a magnet is stored away from power lines, other magnets, high temperatures, and other factors that adversely affect the magnet, it will retain its magnetism essentially forever.
What might affect a magnet's strength?
The factors can affect a magnet's strength:
Heat
Radiation
Strong electrical currents in close proximity to the magnet
Other magnets in close proximity to the magnet
(Neo magnets will corrode in high humidity environments unless they have a protective coating.)
Shock and vibration do not affect modern magnet materials, unless sufficient to physically damage the material.
If I have a Neo magnet with a Br of 12,300 Gauss, should I be able to measure 12,300 Gauss on its surface?
No. The Br value is measured under closed circuit conditions. A closed circuit magnet is not of much use. In practice, you will measure a field that is less than 12,300 Gauss close to the surface of the magnet. The actual measurement will depend on whether the magnet has any steel attached to it, how far away from the surface you make the measurement, and the size of the magnet (assuming that the measurement is being made at room temperature). For example, a 1" diameter Grade 35 Neo magnet that is 1/4"long, will measure approximately 2,500 Gauss 1/16" away from the surface, and 2,200 Gauss 1/8" away from the surface.
How can you tell which is the North Pole if it is not marked?
You can't tell by looking. You can tell by placing a compass close to the magnet. The end of the needle that normally points toward the North Pole of the Earth would point to the South Pole of the magnet.
Magnetism Info (more facts will come on later post)
As a result of this force, the charged particle accelerates in the direction of the force (this is Newton's second law). In the diagram above the particle's trajectory will curve upward.
Magnetic fields are perhaps more easily understood in terms of magnetic field lines. Field lines, also known as lines of force, define the direction and strength of the magnetic field at any local in space. As explained later, magnetic fields have both a direction and strength (or "magnitude"). The direction of the field lines indicates the direction of the field, while the density of the field lines indicates the magnitude of the field. Thus at points where the field lines are closer together, the field is stronger. Field lines are described mathematically with a quantity known as flux.
Magnetic fields are commonly a result of magnetic dipoles. A simple example of a magnetic dipole is the bar magnet:
What does a magnet do?
Magnets do the following things:
Attract certain materials - such as iron, nickel, cobalt, certain steels and other alloys;
Exert an attractive or repulsive force on other magnets (opposite poles attract, like poles repel);
Have an effect on electrical conductors when the magnet and conductor are moving in relation to each other;
Have an effect on the path taken by electrically charged particles traveling in free space.
Based on these effects, magnets transform energy from one form to another, without any permanent loss of their own energy. Examples of magnet functions are:
A. Mechanical to mechanical - such as attraction and repulsion.
B. Mechanical to electrical - such as generators and microphones.
C. Electrical to mechanical - such as motors, loudspeakers, charged particle deflection.
D. Mechanical to heat - such as eddy current and hysteresis torque devices.
E. Special effects - such as magneto-resistance, Hall effect devices, and magnetic resonance.
What are permanent magnets made of?
Modern permanent magnets are made of special alloys that have been found through research to create increasingly better magnets. The most common families of magnet materials today are ones made out of Aluminum-Nickel-Cobalt (Alnicos), Strontium-Iron (Ferrites, also known as Ceramics), Neodymium-Iron-Boron (Neo magnets, sometimes referred to as "super magnets"), and Samarium-Cobalt. (The Samarium-Cobalt and Neodymium-Iron-Boron families are collectively known as the Rare Earths.)
How are magnets made?
Modern magnet materials are made through casting, pressing and sintering, compression bonding, injection molding, extruding, or calendering processes.
How permanent is a magnet's strength?
If a magnet is stored away from power lines, other magnets, high temperatures, and other factors that adversely affect the magnet, it will retain its magnetism essentially forever.
Will magnets lose their power over time?
Modern magnet materials do lose a very small fraction of their magnetism over time. For Samarium Cobalt materials, for example, this has been shown to be less that 1% over a period of ten years.
Modern magnet materials do lose a very small fraction of their magnetism over time. For Samarium Cobalt materials, for example, this has been shown to be less that 1% over a period of ten years.
What might affect a magnet's strength?
The factors can affect a magnet's strength:
Heat
Radiation
Strong electrical currents in close proximity to the magnet
Other magnets in close proximity to the magnet
(Neo magnets will corrode in high humidity environments unless they have a protective coating.)
Shock and vibration do not affect modern magnet materials, unless sufficient to physically damage the material.
How does a magnet's strength drop off over distance?
The strength of a magnetic field drops off roughly exponentially over distance.
Here is an example of how the field (measured in Gauss) drops off with distance for a Samarium Cobalt Grade 18 disc magnet which is 1" in diameter and 1/2 " long.
The strength of a magnetic field drops off roughly exponentially over distance.
Here is an example of how the field (measured in Gauss) drops off with distance for a Samarium Cobalt Grade 18 disc magnet which is 1" in diameter and 1/2 " long.
Can a magnet that has lost its magnetism be re-magnetized?
Provided that the material has not been damaged by extreme heat, the magnet can be re-magnetized back to its original strength.
Provided that the material has not been damaged by extreme heat, the magnet can be re-magnetized back to its original strength.
Can I make a magnet that I already have any stronger?
Once a magnet is fully magnetized, it cannot be made any stronger - it is "saturated". In that sense, magnets are like buckets of water: once they are full, they can't get any "fuller".
Once a magnet is fully magnetized, it cannot be made any stronger - it is "saturated". In that sense, magnets are like buckets of water: once they are full, they can't get any "fuller".
How do you measure the strength or power of a magnet?
Most commonly, Gaussmeters, Magnetometers, or Pull-Testers are used to measure the strength of a magnet. Gaussmeters measure the strength in Gauss, Magnetometers measure in Gauss or arbitrary units (so its easy to compare one magnet to another), and Pull-Testers can measure pull in pounds, kilograms, or other force units. Special Gaussmeters can cost several thousands of dollars. We stock several types of Gaussmeters that cost between $400 and $1,500 each.
Most commonly, Gaussmeters, Magnetometers, or Pull-Testers are used to measure the strength of a magnet. Gaussmeters measure the strength in Gauss, Magnetometers measure in Gauss or arbitrary units (so its easy to compare one magnet to another), and Pull-Testers can measure pull in pounds, kilograms, or other force units. Special Gaussmeters can cost several thousands of dollars. We stock several types of Gaussmeters that cost between $400 and $1,500 each.
If I have a Neo magnet with a Br of 12,300 Gauss, should I be able to measure 12,300 Gauss on its surface?
No. The Br value is measured under closed circuit conditions. A closed circuit magnet is not of much use. In practice, you will measure a field that is less than 12,300 Gauss close to the surface of the magnet. The actual measurement will depend on whether the magnet has any steel attached to it, how far away from the surface you make the measurement, and the size of the magnet (assuming that the measurement is being made at room temperature). For example, a 1" diameter Grade 35 Neo magnet that is 1/4"long, will measure approximately 2,500 Gauss 1/16" away from the surface, and 2,200 Gauss 1/8" away from the surface.
What are Magnetic Poles?
Magnetic Poles are the surfaces from which the invisible lines of magnetic flux emanate and connect on return to the magnet.
Magnetic Poles are the surfaces from which the invisible lines of magnetic flux emanate and connect on return to the magnet.
What are the standard industry definitions of "North" and "South" Pole?
The North Pole is defined as the pole of a magnet that, when free to rotate, seeks the North Pole of the Earth. In other words, the North Pole of a magnet seeks the North Pole of the Earth. Similarly, the South Pole of a magnet seeks the South Pole of the Earth.
The North Pole is defined as the pole of a magnet that, when free to rotate, seeks the North Pole of the Earth. In other words, the North Pole of a magnet seeks the North Pole of the Earth. Similarly, the South Pole of a magnet seeks the South Pole of the Earth.
Can a particular pole be identified?
Yes, the North or South Pole of a magnet can be marked if specified.
How can you tell which is the North Pole if it is not marked?
You can't tell by looking. You can tell by placing a compass close to the magnet. The end of the needle that normally points toward the North Pole of the Earth would point to the South Pole of the magnet.
What are the different types of magnets available?
There are 2 types of magnets: permanent magnets and electro-magnets.
Permanent magnets emit a magnetic field without the need for any external source of power. Electro-magnets require electricity in order to behave as a magnet.
There are various different types of permanent magnet materials, each with their own unique characteristics. Each different material has a family of grades that have properties slightly different from each other, though based on the same composition.
Permanent magnets emit a magnetic field without the need for any external source of power. Electro-magnets require electricity in order to behave as a magnet.
There are various different types of permanent magnet materials, each with their own unique characteristics. Each different material has a family of grades that have properties slightly different from each other, though based on the same composition.
What are Rare Earth Magnets?
Rare Earth magnets are magnets that are made out of the Rare Earth group of elements. The most common Rare Earth magnets are the Neodymium-Iron-Boron and Samarium Cobalt types.
Rare Earth magnets are magnets that are made out of the Rare Earth group of elements. The most common Rare Earth magnets are the Neodymium-Iron-Boron and Samarium Cobalt types.
Which are the strongest magnets?
The most powerful magnets available today are the Rare Earths types. Of the Rare Earths, Neodymium-Iron-Boron types are the strongest. However, at elevated temperatures (of approximately 150 C and above), the Samarium Cobalt types can be stronger that the Neodymium-Iron-Boron types (depending on the magnetic circuit).
The most powerful magnets available today are the Rare Earths types. Of the Rare Earths, Neodymium-Iron-Boron types are the strongest. However, at elevated temperatures (of approximately 150 C and above), the Samarium Cobalt types can be stronger that the Neodymium-Iron-Boron types (depending on the magnetic circuit).
What does 'orientation direction' mean?
Most modern magnet materials have a "grain" in that they can be magnetized for maximum effect only through one direction. This is the "orientation direction", also known as the "easy axis", or "axis".
Unoriented magnets (also known as "Isotropic magnets") are much weaker than oriented magnets, and can be magnetized in any direction. Oriented magnets (also known as "Anisotropic magnets") are not the same in every direction - they have a preferred direction in which they should be magnetized.
Most modern magnet materials have a "grain" in that they can be magnetized for maximum effect only through one direction. This is the "orientation direction", also known as the "easy axis", or "axis".
Unoriented magnets (also known as "Isotropic magnets") are much weaker than oriented magnets, and can be magnetized in any direction. Oriented magnets (also known as "Anisotropic magnets") are not the same in every direction - they have a preferred direction in which they should be magnetized.
Magnetism Info (more facts will come on later post)
What are magnetic field lines?
Magnetic fields are historically described in terms of their effect on electric charges. A moving electric charge, such as an electron, will accelerate in the presence of a magnetic field, causing it to change velocity and its direction of travel. This is, for example, the principle used in televisions, computer monitors, and other devices with CRTs (cathode-ray tubes). In a CRT, electrons are emitted from a hot filament. A voltage difference pulls these electrons from the filament to the picture screen. Electromagnets surrounding the tube cause these electrons to change direction, so they hit different locations on the screen. This is how it works: An electrically charged particle moving in a magnetic field will experience a force (known as the Lorentz force) pushing it in a direction perpendicular to the magnetic field and the direction of motion:
As a result of this force, the charged particle accelerates in the direction of the force (this is Newton's second law). In the diagram above the particle's trajectory will curve upward.
Magnetic fields are perhaps more easily understood in terms of magnetic field lines. Field lines, also known as lines of force, define the direction and strength of the magnetic field at any local in space. As explained later, magnetic fields have both a direction and strength (or "magnitude"). The direction of the field lines indicates the direction of the field, while the density of the field lines indicates the magnitude of the field. Thus at points where the field lines are closer together, the field is stronger. Field lines are described mathematically with a quantity known as flux.
Magnetic fields are commonly a result of magnetic dipoles. A simple example of a magnetic dipole is the bar magnet:
As you can see, the magnetic field lines always begin on the north pole of a magnet, and end on the south pole. This diagram illustrates the magnetic field lines of a typical magnetic dipole.
Magnetic dipoles always like to align themselves parallel to an external magnetic field, so the dipole's field matches the one applied to it. This is why bar magnets line up north-to-south. It also explains the behavior of a compass needle, which, being composed of Iron (a ferromagnet), behaves like a magnetic dipole.
What is the north pole of a magnet and how can I identify it?The north pole of a magnet is the pole that aligns itself with geographic north. As a result, the geographic north pole of the earth is actually very near the earth's magnetic south pole:
Magnetic dipoles always like to align themselves parallel to an external magnetic field, so the dipole's field matches the one applied to it. This is why bar magnets line up north-to-south. It also explains the behavior of a compass needle, which, being composed of Iron (a ferromagnet), behaves like a magnetic dipole.
What is the north pole of a magnet and how can I identify it?The north pole of a magnet is the pole that aligns itself with geographic north. As a result, the geographic north pole of the earth is actually very near the earth's magnetic south pole:
This is sometimes an issue of confusion, but we are stuck with it. What we call "magnetic north" is really magnetic south.
To identify the north pole of a magnet, you can make a compass out of it. Either hang it on a string or float it on water. The pole that faces geographic north is the north pole. Once you have one magnet with poles identified, it is easy to label others, as like poles repel and opposite poles attract.
To identify the north pole of a magnet, you can make a compass out of it. Either hang it on a string or float it on water. The pole that faces geographic north is the north pole. Once you have one magnet with poles identified, it is easy to label others, as like poles repel and opposite poles attract.
What is a Temporary Magnet?
Temporary magnets are those which act like a permanent magnet when they are within a strong mag
netic field, but lose their magnetism when the magnetic field disappears. Examples would be paperclips and nails and other soft iron items.
netic field, but lose their magnetism when the magnetic field disappears. Examples would be paperclips and nails and other soft iron items.A body of normally a soft steel or piece of iron which is readily magnetized but retains only a very small field after the active power of the external magnetic field is removed.Temporary magnets act as magnet only as long as it is in the magnetic field produced by a permanent magnet or an electric current. Magnetic materials from which temporary magnets are made are called soft magnetic materials. Every object that is lifted or moved by a magnet acts as a temporary magnet. Those objects will eventually lose its magnetism once the permanent magnet is removed, although in certain cases it will remain weak magnetic properties.
Temporary magnets are made of such materials as iron and nickel. The materials are known as soft magnetic materials because they usually do not retain their magnetism outside a strong magnetic field.
There are two essential ingredients for generating a magnetic field. Those two ingredients are, Magnetic Material or currents.
You can create a temporary or permanent magnet by what kinds of metals you use. By stroking a permanent magnet onto a pure metal in one direction many times, soon it will become temporarily magnetized. What causes this is the Magnetic Domain by witch tapping the magnet and metal you nudge any stubborn domains into alignment.
Currents can be used to make a magnet by getting a bar of iron and wrapping it with wires then run a current through the wires.
http://www.geocities.com/sunsetstrip/palms/8423/what.htm
http://www.coolmagnetman.com/magtypes.htm
http://answers.yahoo.com/question/index?qid=20071027085414AAXly2f
http://hubpages.com/hub/Permanent-and-Temporary-Magnets
There are two essential ingredients for generating a magnetic field. Those two ingredients are, Magnetic Material or currents.
You can create a temporary or permanent magnet by what kinds of metals you use. By stroking a permanent magnet onto a pure metal in one direction many times, soon it will become temporarily magnetized. What causes this is the Magnetic Domain by witch tapping the magnet and metal you nudge any stubborn domains into alignment.
Currents can be used to make a magnet by getting a bar of iron and wrapping it with wires then run a current through the wires.
http://www.geocities.com/sunsetstrip/palms/8423/what.htm
http://www.coolmagnetman.com/magtypes.htm
http://answers.yahoo.com/question/index?qid=20071027085414AAXly2f
http://hubpages.com/hub/Permanent-and-Temporary-Magnets
More Magnets (experiments with them)...
Today we did experiments with iron fillings and magnets, this is shown in the picture on the above post. We think that the Iron fillings are like younger brothers and sister, they follow you around!
We also did experiments in the difference between bar and ring magnets.
Paper Clips:
Bar=3
Ring=2* came off after a minute
Nail:
Bar=6
Ring=4
these measurements for the nails were not end to end, only 1 nail was touching the magnet though
How far off ground, to pull up paperclips
using horizontal ruler
Bar=3.3cm
Ring=0.8cm
We also did experiments in the difference between bar and ring magnets.
Paper Clips:
Bar=3
Ring=2* came off after a minute
Nail:
Bar=6
Ring=4
these measurements for the nails were not end to end, only 1 nail was touching the magnet though
How far off ground, to pull up paperclips
using horizontal ruler
Bar=3.3cm
Ring=0.8cm
Monday, November 3, 2008
Our invention has been approved
We are making change in the work place, our invention will reorganise and meet peoples requirements by help keep paperwork mess to a minimum in a fancy way of storing it.
Our invention will be a bit like a Ferris wheel, all the carriages (in our case document trays) will stay level at all time thus insuring the paper work will not spill out.
Most of it will be made in carpentry be me, Jordan and there is no other option to that but Ben will be in charge of electrics and all skill, parts and thinking that is required for that.
We are hoping that our invention will be a hit and that it will work smoothly and be made without any major mis-happenings.
we were tossing around the idea of keeping out invention a secret but we though that it would be better if you, the audience could follow our journey easier. keep following for up-to-date action on our mini structure marvel.
Enjoy our journey and comment on the posts to give us directions and suggestions!!!!
Our invention will be a bit like a Ferris wheel, all the carriages (in our case document trays) will stay level at all time thus insuring the paper work will not spill out.
Most of it will be made in carpentry be me, Jordan and there is no other option to that but Ben will be in charge of electrics and all skill, parts and thinking that is required for that.
We are hoping that our invention will be a hit and that it will work smoothly and be made without any major mis-happenings.
we were tossing around the idea of keeping out invention a secret but we though that it would be better if you, the audience could follow our journey easier. keep following for up-to-date action on our mini structure marvel.
Enjoy our journey and comment on the posts to give us directions and suggestions!!!!
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