Advice 1: How to make at home compass

Compass – not the kind of thing you can find in every home, but to do it yourself will not be easy. Improvised that will surely be everyone, you can make a simple compass, which will allow you to determine the part of the world.
How to make at home compass
Instruction
1
Take a small piece of foam rubber or foam the size of a matchbox. It will act as a carrier for the arrows of the compass you want to make any needles. Instead of foam you use and the foam. Importantly, the material from which the substrate will be done, not drowning in the water and was easy.
2
Now you need to magnetize a makeshift compass needle with one hand and demagnetize it. If you do not see at home magnets, look around. You will find that on the Cabinet doors, the magnet can be found in the clips that hold the door in closed position. In addition, in any audio dynamics, you can find the magnet, which is one of the major components of the dynamics. Do not have to pull out the magnet. Just hold the end of the needle near the magnet for about a minute – long enough for him to magnetize.
3
The next step is to demagnetize the other end of the needle. This can be done by fire. Use a lighter, matches or a burner of a kitchen stove to lightly heat the tip of the needle (opposite to that which magnetized).
4
Pour into a bowl, deep plate or any other non-metallic bowl with water almost to the brim and down on the surface of the substrate with the needle. Under the influence of the laws of physics, the needle will turn so that one end will face North and South. As you may have guessed, a magnetized end will point North.
Useful advice
If the North front, and South behind, the right is East and the left West.

Advice 2: How to make boxes for speaker

Nice clean sound welcome, not only when writing music, but when listening to it at home, at a party or even in the car. Recently, audiosync indulges us with abundance of grace, which is able to instill a love of quality music. But as we know, costs money. When choosing zvukoizvlechenija equipment necessary to focus on the optimal ratio of price and quality. You can also try to make the box yourself, if you are going to buy some speakers, for example, for the car.
How to make boxes for speaker
You will need
  • Board MDF (22 mm), two speakers.
Instruction
1
Before sawing MDF, calculate the quantity of material that you will need. This unit will depend on the size of your speakers. To calculate this value use the program JBL Speakershop. To account for all dimensions of the future boxes use during the work program Volume Box Calculator.
2
After marking the sheet of MDF will do the sawing works using a circular saw or jigsaw. Put together 2 the walls of the future boxes to run their compounds: drill small holes, then install the screws. Repeat this procedure for all the remaining walls of the box.
3
The design of our boxes in the section should resemble a square with a diagonal cut, so the top Board needs to do a little bevel. Take a ruler and set it against the two side walls, draw lines of the bevel. With the plane to create the bevel. In a pinch, you can use a conventional plane.
4
After performing a bevel, you need to flip the box on a sheet of MDF and draw lines on which you cut the top cover. Now the same thing with the side walls of the box: put the box on its side and cut note. It remains to connect all parts of the design, linking them with screws and carpenter's glue (for strength).
5
Tick on the box speaker size and cut a circular hole. Can be immediately covered with fabric, and then insert speakers in the box.

Advice 3: Foam: how to make it at home

The foam can be done independently at home. You do not even need special equipment. However, as such, self-made, foam may be very mediocre.
Foam: how to make it at home
You will need
  • polystyrene
Instruction
1
To make foam, take a lot of polystyrene balls and fill their container. (Apparently these little balls resemble beads).
2
To the polystyrene balls were glued together, heat them very hot steam. The heat the bulbs produce until, until they begin to swell. After the balloons are inflated, they will approach each other, coalesce and take the form of a container.
3
After cooling, the resulting mass of foam can be considered ready. If you have produced any shape, remove the foam from the tank (capacity in this case will have to dismantle or break). If the foam is suitable for insulation, then leave it in between the walls.
4
To get a real, high quality foam, you will need special equipment and a workshop. Easier and more profitable to produce urea foam.
For manufacturing prepare solution, having dissolved in water at room temperature a blowing agent and a curing catalyst. Start the installation. Pour the foaming agent solution and the resin in the tank. Feed the input of compressed air. Turn on the pumps. Open the taps with the words "solution" and "resin". Pour the resulting penomassu in a special form. Cut and dry foam obtained (this may take up to three days).
Note
The room must be well ventilated as in the production of foam formed toxic substance formaldehyde.

Advice 4: How to magnetize a compass

Like crafts? As well as walking in the woods for mushrooms and berries and to travel? Align your passions and make a compass with his hands. No doubt you will be proud to use it!
How to magnetize a compass
You will need
  • - cut the steel wire;
  • - a small piece of sheet metal;
  • - a box of the cream;
  • - oil paint;
  • - cardboard;
  • - linen buttons;
  • - thick paper;
  • glue;
  • tools.
Instruction
1
Take a round box with a lid. You can take a plastic box of cream or powder. No plastic - take the metal from the Shoe. Otoshita it, remove mill scale and paint with oil paint.
2
With the help of a compass will watertite cardboard bottom (the circle on the inner diameter of the box). Cut it and make a smooth hole in the center with a size of 2 mm. Fasten it to the clothes line button so that the bottom was a projecting part of the button.
3
From construction paper make kartoshku (its diameter is also equal to the diameter of boxes), paint paint and cut. Connected to the bottom, and the bottom set in a box. Make a collar of cardboard and smeared with glue, tightly set in a jar. Firmly press.
4
Make a side below the top edge of the box by 5-6 mm. Cut plexiglass round for glazing the compassand make the center hole and insert the second clothes line button, convex part up. Secure the glazing on the edge with spring rings, made of steel wire. Linen buttons thrust bearings, in which rotates the axis of the arrow.
5
Make the axis arrows of the wire, which can rotate freely in the thrust bearings. The ends of the axis treated with a mill file and a whetstone to sharpen knives.
6
Take a plate, make her the arrow. In the finished arrow to punch a hole that the axle was sitting tight. Take the axle in your hand and check that the arrow is balanced or not. If necessary to file an outweighing the end of the file. Remove the arrow with the axis and magnetize it. First, at one end of the arrow make the needle marking the letter N, then take the magnet and its South pole (usually indicated by a red color) swipe from center to the end of the arrow. Then repeat the procedure on the other hand, only the North pole. Repeat all several times.
7
Set the arrow on the axis – it will occupy a certain position and will show to the North. Install the axle bearings and compass ready.
Note
During Assembly of the compass, ensure that the glass does not slow the cursor movement.
Useful advice
You can use the magnets from the speakers and tape recorders, TVs. They have the shape of a ring, so they should neatly split into several parts with a hammer.

Advice 5: Looks like a compass

Compass is a reliable assistant of the tourist, fisherman and hunter. It helps to feel confident even in an unfamiliar forest edges. Having the skills to work with this device, you can navigate the terrain, choosing the right direction and not risking to get lost. Travel magnetic compass cheap, practical and simple in its design.
Looks like a compass
Instruction
1
A traditional magnetic compass designed for tourists or hunters, in appearance resembles a large wrist watch. Its body usually has a rounded shape. The upper part of the compass covered with glass. Under it is a flat disc with the applied a circle with tick marks. The disk may be divided into 360 degrees, or 120 parts. In the second case, the price of one division is equal to three degrees. The disk contains also the letters indicating the part of the horizon.
2
In the center of the disk is fixedly mounted needle which is free to rotate the arrow of the magnetic material. As a rule, the compass is equipped with a special brake lever which locks the arrow in a stationary state, when the device is not in use. Before use, squeeze the lever, after which the magnetic needle becomes in a free condition, one end pointing North, others South. To facilitate the pointing of the compass on the reference point, the device supply sighting.
3
Compass military purposes resembles a tourist, but can be composed of a ruler and an additional scale on the disk, marked in thousandths of a radian. Typically, such devices produce in a metal case. Sighting device here has a more impressive look and enables simple survey of the area. The military compass can be equipped with magnifying lens for examination of cartographic materials. Such a device allows to determine the direction of movement with greater accuracy.
4
There are special compasses for geologists. This is a professional device, usually equipped with protection against adverse external influences and additional scale, directed counterclockwise. It also has a built-in clinometer and other useful accessories, which can, for example, to quickly determine the angles of occurrence of the individual geological layers. Geological compass may be accompanied by a rugged case that protects the unit from shocks, and therefore essential for transportation.
5
For river and sea vessels, and aircraft is usually set so-called gyroscopic compasses. This massive device can be of various shapes and sizes. Such a device has a high resistance to vibrations, pitching and deformation. Compass of this type has a built-in gyroscope, so it shows the true and not the magnetic pole of the planet. In everyday practice travel enthusiasts to deal with such devices have rarely.
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