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DC circuits

At this point will describe the major circuits in DC and its analysis, ie the calculation of intensities , tensions or powers.

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seeing mill circuits

parts of a circuit

Figure 1: Circuit example.

To analyze a circuit must know the names of the elements that comprise it. The following are the names common, as exemplified by the circuit shown in Figure 1.

• Connector: thread of negligible resistance (ideally zero) that electrically connects two or more items.

• generator or source : An element that produces electricity. In the circuit of Figure 1 there are three sources, one of intensity, I, and two voltage, E1 and E2.

• Node: point in a circuit where multiple concur different drivers. In Figure 1 there are four nodes: A, B, D and E. Note that C has not been taken into account as it is the same node A in the absence of each potential difference (V _A - V C = 0).

• Rama: The set of all elements of a circuit including two consecutive nodes. In Figure 1 are seven branches: AB by the source, R1 AB, AD, AE, BD, BE and DE. Obviously, for a branch can only drive a current .

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PART 3 / 3

the third and last part will be published tomorrow, Wednesday 5 November.

the cause of this is that the last part is the presentation of the project (with the permission of the instructor divided)

here some pictures of the initial project contruccion:

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windmill PART 2 / 3

second part:

sgundo part in this summer and is inserted in the last few feet to the total funsionamiento mechanism, the embedded PIESA will join the mini resent -mechanism is not yet

espesificara

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vientoPARTE mill 1 / 3

first part:

in this small part as inisia see the traction of the gears, holding that "grab" to aser turn the rest of the mechanism (still not ready)

grabasion place: the home of a member

cameraman (afisionado): Jhulian Muñoz (treasurer)

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Windmill

perhaps the most famous and known and between them and by Don Quijote de La Mancha , but was everywhere but especially in Spain, where currents of rivers were not as important as in other European countries. Can still be seen in Criptana Country (Ciudad Real) , or Consuegra (Toledo).
The windmill is a classic stone structure with cylindrical or conical, circular base, on top of which there are blades that turn wind energy in mechanical energy (motion). This top (which also serves as a cover) is a wooden framework on the drum turning stone to guide the blades in the direction of the wind, through a long tree (government, to the right of the image) outside the building, which is tied to milestones lashed down. The blades move a wheel nearly vertical (catalina), by other gear (flashlight), transmits the movement of the blade shaft to a vertical axis, which moves the tramp.
At the top of the building, under cover, there are some small windows (which are also pictured) which served as the miller knew the wind direction and, therefore, could orient the blades as best agreed with the government .
blades are available on tarps to catch the wind, which was withdrawn when the movement was not necessary, thereby increasing the duration of the mechanisms, which were generally

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The friction wheels

Cam (mechanical)

camshaft engine.

movement of a cam. In
mechanical engineering, a cam is a mechanical device made of some material (wood, metal, plastic, etc.) That is secured to a shaft and has a specially shaped contour. Thus, the shaft rotation causes the profile or contour of the cam touch, move, push or connect a piece known as follower. There are two types of followers, translation and rotation.
The union of a cam is known as a union of a point in case of a plane or line join if space. If necessary, you can add teeth to the cam to increase the contact.
a cam design depends on the type of movement to be printed in the supporter. Examples are the camshaft the internal combustion engine , programmer washing, etc.
can also perform a classification of the cams in their nature. Thus, There's the revolution, translation, desmodromic (these are those that perform a dual action effect), etc.
The machine used to make paddles is known as a generator.

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Cam sprockets

allows the transmission of rotary motion between two parallel or perpendicular lines, changing the characteristics of speed and / or direction of rotation.
Its practical applications are limited because they can not transmit large forces between the axles, because its whole operation is based on the friction that occurs between the two wheels. It is found in the dynamos of the Bicycle transmission systems at wells and rocker movement, player ...
Description
This system consists of two-wheeled solidarity with their axes, whose perimeters are in direct contact. The movement is transmitted from one wheel to another by drag (friction).
From the technical point of view we must consider at least 4 operators:
Driving shaft: having the money we want to convey. Normally be attached to a motor.
wheel driving: solidarity with the driving, pick up the rotation of this which is transmitted by friction (rubbing) to the driven wheel driven gear
: includes the rotation of the driving wheel by friction between them. Shaft driven
: get the rotation of the driven wheel and transmits it to receiver.

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The gear (gear, sprocket) is basically a wheel with teeth completely covered perimeter. The most common type of gear has straight teeth (longitudinal) but also the teeth are curved, oblique ...
For proper operation, the operator often turn solidarity with its axis, so that both are linked by a detachable joint use another operator named key.
Special cases of the sprockets are the worm and zip.

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A pulley, also called pulley, carrucha, trochlear, sheaves or cheek simpleque is a machine used to transmit a force. This is a wheel, usually solid and grooved edge, which, with the help of a rope or cable that passes through the channel ("throat"), is used as the transmission element to change the direction of movement machines and mechanisms. In addition, forming joint-rigging or hoist, serves to reduce the magnitude of the force required to move a weight, ranging in speed.
As defined by the Goupillières Haton, "the pulley is the fulcrum of a moving rope is wound on her without a full turn" acting on one end the other the strength and power.

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crank pulley bolt

The mechanism of connecting rod - crank is a mechanism that transforms a circular motion to a translational motion (or vice versa) . The most common current example is in the internal combustion engine of a car, in which the linear motion of piston produced by the gas explosion is transmitted to the crank and becomes circular motion in the crankshaft .
Schematically, this mechanism is created with two "bars" joined by a union revoluta. One end of the rotating bar (handle) is attached to a fixed point, the center of rotation, and the other end is attached to the rod. The remaining end of the rod is attached to a piston that moves in a straight line.

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Biela Pine nut

is used in the conversion of a movement rotating in a linear continuous when necessary clamping force or a large reduction ratio. This utility is especially appreciated in two practical applications: Union
removable objects. To what uses threads with grooves in "V" because its friction prevents loosening easily. It found in almost all types of objects, or using as nut unite the material itself (in this case used as a threaded nut on the object itself) or pinning the objects between the head of screw and nut. Using
as nut material itself is used in fastening systems of pulleys, computers, locks, motors, appliances ...

Holding the object between the screw and nut is used in: steel structures, assembly of thin sheets, as the rotation axis articulated objects (hospital bed, compass, sunglasses ...), etc.


displacement mechanism. For the commonly used square threads (one or more wires) due to its low friction. It is found in many everyday objects: taps, bottle caps and bottles, lipsticks, glue sticks, lifting of workshops, car jacks, clamps, clips, machine tools, corkscrews ...
For example, in the case of taps allows us to open (or close) the passage of water raising (or lowering) the shoe as we turn the key properly.
When the linear progress requires great precision (eg, measuring instruments) this device replaced with great advantage to the system rack-pinion .
Description
for the proper functioning of this mechanism need at least a screw which mates perfectly a nut (or a threaded hole).

This technical system can be raised in two basic ways:
A screw fixed position (can not move longitudinally) that the spin causes the displacement of the nut. The bar
gluing the screw does not move, but its rotation causes the cylinder Queue up or down because this is what makes the nut.

a nut or threaded hole fixed (can not rotate or move longitudinally) that produces the displacement of the screw when it rotates (the water before it can be considered an example of this operation.)



Features screw-nut system has a big advantage over other systems for converting rotary motion into longitudinal: each turn of the screw nut only moves the separation distance is between fillets ( pitch ) so that the clamping force (longitudinal) is very large.
On the other hand, has the disadvantage that the system is not reversible (we can not apply a longitudinal movement and get a dial).
screw-nut system and sliding mechanism is used in many machines can offer service in both systems that require high precision of movement (balance, micrometer screws, position transducers, position ...) and low-precision systems .
Although most of the screw-nut systems are manufactured in steel, also can be found made of other metals (bronze, brass, copper, nickel, stainless steel and aluminum) and plastics (nylon, Teflon, polyethylene, pvc ...), all depends on your operating conditions.

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Mechanism
Rack & Pinion rack and pinion mechanism is aimed at the transformation of a rotation or circular motion (gear) in rectilinear motion (zip) or vice versa. This mechanism as its name indicates, is composed of two components that are rack and pinion.
The sprocket is a wheel cylindrical gear usually describing a rotation around its axis.
The toothed rack is a piece that describes a rectilinear motion in either direction as the rotation of the pinion.
rack and pinion mechanism functions as a simple gear, this means that both the rack and pinion must have the same circular pitch, and consequently, the same module.
Pitch can be calculated from the characteristics of the pinion:
p = D / z
p = pitch of the pinion or the rack.
D = pitch diameter of the pinion.
z = number of pinion teeth.
The speeds of both elements are determined mainly by the dimensions of the pinion. Specifically:
V = D / 2
V = velocity of the rack
= rotation speed of the pinion gear
usually acts as a motor and rack driven element, so we can perform the transformation of circular motion in rectilinear motion .
processing mechanisms
rack and pinion rack and pinion mechanism has different applications as we will explain below.
The first application that we can give the rack and pinion mechanism is in the direction of a car featured in the following diagram.
address configuration: The steering system is the steering wheel and drive the steering column, which transmits the driver's steering force to steering gear, the steering gear unit, which performs reduced speed of rotation of the steering wheel, transmitting a great force to address connection and the connection that transmits the movement direction of the steering gear to the front wheels.
Steering Column: it consists of the main shaft, which transmits the rotation of the steering wheel, the steering gear and column tube, which mounts to the main axis of the body. The column tube includes a mechanism by which shrinks by absorbing the impact of the collision with the driver, for one.
steering gear: not only turns the wheel rotation direction of the movements which change the direction of tire rolling. This also reduces the speed of rotation of the steering wheel so as to ease the operational strength of management, increasing the strength of the operation and transmitting this to the front wheels.
steering gear rack and pinion: The rotation of a gear (gear) at the end of the main shaft engage with teeth that are supported in a bar (zip) changing the spin on a movement from left to right.
Another application of this mechanism is also in the drill press, as seen in the following scheme:
the operations in this type of drill are:
labor movement: the motor transmits its motion to the mandrel by the belt L, integral with the crankshaft pulley with the cone (it is a series of different diameter pulleys, but interdependent with each other and with the same axis of rotation) M head integral with the mandrel shaft. Varying
through l strap the connection between the two cone pulleys M and N, vary relations between the diameters and therefore the speeds of the crankshaft and the driven shaft. For each L cone pulley there are five different connection options with the cone M and, therefore, five different gear ratios. The back and head pulley can be changed each other, thereby obtaining a double No. relationships.
Forward movement: forward movement of the tool into the part to be drilled is obtained manually by the operator.
The operator, acting on the lever N, O turns the pinion meshing with the rack P. With the rotation of the pinion linear motion is obtained handle Q and, consequently, tree Chuck C coupled with that. It prevents the rotation of the sleeve with the mandrel shaft by a screw fixed to the head T. R
Once the advance stroke, the lever returns to its initial position by the action of a spring call.
control the driving depth: depth means forward, the stroke length of the tool into the part to be drilled, corresponding to the height H of the hole. The depth control of the advance is obtained by reading the race on the scale tool setting at the foot of the joystick. The tool is based on the piece corresponding to the point where you want to make the hole. It turns the graduated circle, adding to initial reading of the hole depth H to reach the graduation rate B C given by this sum. It latches in this position, the graduated circle to the fixed part of the machine by the screw D. The race of the tool is interrupted at the time of the stop and make contact with the tooth F, corresponding to the predetermined point on the graduated circle.
And finally the last application that we give the rack and pinion mechanism is in the lock of a door as we shall see below
This mechanism transforms the circular motion that occurs when you turn the key in reciprocating linear motion Bolt to run the same.
A lock many elements. Within what is commonly called keyhole found a few teeth, which are to enter the key belonging to lock that can turn the key and we can not unless the key is that lock. Around this
eye is a crown, which rotates the eye by turning the lock. Meshing with the pinion gear is another which in turn engages with the lock bar, which is what makes the reciprocating linear motion (is this part where the rack and pinion mechanism).
There are countless types of locks, but their use is basically the same: to safely close a door or other opening.

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Lever: the world's oldest machine

Since ancient times, humans learned to transform his little strength in a larger. This is achieved with the invention of machines. The first machines were simple systems where men and women facilitated their work, are now known as simple machines. The wheel, lever, pulley, screw, inclined plane and wedge are some simple machines. The lever and the inclined plane are the simplest of them all. Scientists believe the other machines, derivations and applications of these two.
Primitive man thanks to his intuition realized that the levers, the mechanism used in waves, paddles, etc.. they could help you make the most of your muscle strength. But it was Archimedes (287-212 BC), a scientist of ancient Greece, who succeeded in explaining the operation of the lever.
illustrated his theory with a famous phrase: "Give me a fulcrum and I will move the world", assuming they have a long enough lever could move the earth with its own forces. Archimedes
based on two principles, established the laws of the lever. Principle 1

"If you have a lever on the ends of equal weights act, the lever will be balanced by placing the fulcrum in the middle of it. "
Pincipio 2
" A weight can be decomposed into two parts acting at the same distance from the midpoint of the lever.
But ... what are really the levers?
lever is defined as a rigid bar supported at a point which applies a small force for a large force at the other end, the small force is called "power" (p) and great strength, "resistance" (R), the axis of rotation about which the lever turns is called "fulcrum" or "fulcrum" (A).
levers Using the principle of moments where one of the forces rotate the lever in one direction and the other in the opposite direction.
A variety of levers
According to the position of "power" and "resistance" with respect to the "point of support," we consider three classes of levers, which are:
1 .- In the first type the fulcrum is located between the load and the applied force. The closer the load then the force applied can be lower. It is our intuitive idea of \u200b\u200bleverage, which helps us to move a heavy load.
2 .- In the second type the fulcrum is at one end of the arm, the load is located at the closest to the fulcrum and the force applied on the remote. Thus does a wheelbarrow. Its utility is evident, the closer the load on the trolley fulcrum (wheel) is easier to move it.
3 .- In the third type, the fulcrum is at one end, but we reverse the relative positions of the load and the applied force. As the load is furthest from the fulcrum the force applied must be higher. In contrast, the load has a big move. Such are the levers that function in the joints of the arms for example.

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Leva (Mechanical)

in engineering mechanics, a cam is a mechanical device made of a material (wood, metal, plastic, etc.) That is secured to a shaft and has a specially shaped contour . Thus, the shaft rotation causes the profile or contour of the cam touch, move, push or connect a piece known as a follower. There are two types of followers, translation and rotation.
The union of a cam is known as a union of a point in case of a plane or line join if space. If necessary, you can add teeth to the cam to increase the contact.
a cam design depends on the type of movement to be printed in the supporter. Examples are the camshaft internal combustion engine, the developer of washing machines.
can also perform a classification of the cams in their nature. Thus, no revolution, translational, desmodromic (these are those that perform a dual action effect, etc.).
The machine used to make paddles is known as a generator.

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hoist

is a combination of fixed and movable pulleys traversed by a single cord having one end anchored to a fixed point.

technical elements of the system are: *



fixed pulley's mission is to change the direction of the force (power) we exert on the rope. Exercising power facilitates downstream lifting, because we can help our own weight.

*

The movable pulley mission is to provide mechanical gain of the system. Generally, each movable pulley provides a gain equal to 2. *


rope (cable) transmits forces between the elements. Its tensile strength must be based on the value of the resistance and the mechanical gain of the system, which in turn depends on the number of running blocks and their combination with the fixed.

The gain of each system depends on the combination made with the fixed and movable pulleys, for example, we may gain 2, 3 or 4 to employ a fixed pulley and a mobile, two fixed and mobile or fixed and two mobile respectively. Two pulleys hoist


three pulleys hoist hoist

three pulleys

This system has the disadvantage that the distance that an object can be raised depends on the distance between pulleys (usually between the first two pulleys, the fixed and mobile first). To fix mechanisms are used in several mobile and fixed pulleys respectively coupled common axes, are traversed by the same rope.
hoist pulleys and mobile number
Limitation on use of hoists

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NINTENDO WII - NINTENDO WII VIDEO

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Wii is the fifth video game console produced by Nintendo, developed in collaboration with IBM and ATI . The Wii is the successor to the Nintendo GameCube . competes with the Playstation 3 Sony of and Xbox 360 of Microsoft as part of the seventh generation consoles of . [3]
The most distinctive feature of the console is its wireless controller, the Wii Remote, which can be used as a handheld device with the aim, besides being able to detect the acceleration of the movements in three dimensions. Another of its peculiarities is what has been called WiiConnect24, which enables you to receive messages and updates over the Internet in standby mode. [4] Finally, the Wii can synchronize with the Nintendo DS portable console , which allows the Wii take advantage of the touchscreen of the Nintendo DS.
Nintendo first spoke of the console in the press conference of E3 of 2004, but not until E3 2005 when displayed to the public. Satoru Iwata revealed a prototype of the controller at the September Tokyo Game Show of 2005 . In the E3 2006 is the console of the most outstanding award winning show. The 8 December 2006 of , Wii launch was finished in four key markets. A few months later, Financial Times reports that since September 12 of 2007 , Wii is the sales leader of his generation, based on sales figures Enterbrain, NPD Group and GfK . [5]
Since its launch, the console has received awards for innovation of his command and the popularity it has generated quickly. He has also received awards for the large number of sales you've had. On the other hand, some developers to note the success of the Wii world, have apologized to the company Nintendo for launching low-quality games and have not been optimistic about the system. However, some developers and analysts have opined that the success of the Wii will be short-lived and outweighed by the PlayStation 3.

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Flipchart welcome

is a teaching aid for the promoter school parents. Includes drawings and sketches that will reinforce the motivation, analysis and reflection of the different relevant topics and issues included in the methodological guide. It constitutes an important material for the development of experiential workshops. Prints
emplasticadas with full color illustrations, with metal spring filling on top. Slides show the pathophysiology of hypertension, the organs affected by complications, risk factors, treatment - with an emphasis on a healthy lifestyle - a diet guide, and finally physical activity recommendations.

is an instrument used for the presentation of ideas in the form of exhibitions. It consists of an easel, on which are mounted sheets of paper printed or drawn, subject to stand with rings, tapes or tacks. According to the material, there are wooden flip or tubes, usually aluminum.
According to the arrangement of leaves, is classified as follows:
structure to be followed when creating a flipchart [edit ]
- The cover
On the cover is written the name of the learning unit to be addressed in a class , in an exhibition.
-
The problem situation is a question whose answer is given in the summary.
- Objectives Describe
learning learning would be achieved at the end of the class session.
- The initial incentive
is a picture tells a story or is related to the theme of the flipchart.
- The thematic development
Includes disaggregate group leaves the central issue in its main parts.
-
synthesis constitutes the response given to the problem situation.
- The final incentive
can also be a picture of a story about a subject that you log out of school.


Advantages and Disadvantages of this teaching resource advantages

Its use is low cost. If necessary, allows sheets for analysis back again. When using the previously prepared flipchart with leaves, they must be prepared and arranged with care. Each must carry the message accurately, highlighting key points. When a film does not fit the idea that needed expression, must be eliminated. Disadvantages

- When you make or prepare a flip chart takes a long time to finish.
- When using a flipchart generate a destruction of trees because they provide us the paper we use.
- When writing might have some spelling mistakes and could not fix.
- It shows a bad writing (not always).
- not very reliable because inadvertently or external causes beyond our own, it could be wet, it will cause the ink markers are run, or it might break.

Recommendations for the development of a "flip chart"
- Color: Though often selected white pages, you can also use light blue or yellow. On this last stand very well the marker ink dark blue, red and dark green.
- Margin: You should leave a margin or dead zone on all edges of the sheet, which is higher in the information to turn the pages.
- Text: The text to be included should be brief and simple, presenting only relevant ideas. Should not exceed eight (08) lines per sheet.
- Font: strokes must be made clear and simple. We recommend using block letters or cursive with rounded features, being easy to read letters that require less time to read. Once you select a font, do not mix it with another.
- Font size: You must be proportional to the size of the audience. We recommend letters 3 inches high by 2 wide approximately, for small groups.
- Presentation: Avoid splitting words at the end of each line and the use of abbreviations .- Markers, broad tip markers can be used aqueous solution (not permanent) or indelible ink.
- Readability of Color: In the development of flip chart sheets, you should also pay attention to color schemes, both among those used to present information as in the contrast effect produced by colors on the base sheet. Below is a table showing the readability of the color scheme.
Black on yellow sheets of Black on white sheets (little interest) Blue on white sheets of Green on Red white sheets on sheets of white sheets Orange on Yellow White on white sheets (avoid used)

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