Tecno Bil

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24 pensamientos en “Tecno Bil

  1. Aquí os dejo el enunciado de los mismos, en inglés, para que vayáis practicando para el examen.
    En este primero practicar sólo lo de la Ley de Ohm y la Ley de la Potencia,los voltajes, lo de las intensidades,etc. Los transformadores aún no lo expliqué y el consuno aunque expliqué algo entra para el siguiente. Por tanto, no pregunto ni “transformers” ni ” How much will we have to pay”….
    Study and you will have good luck¡
    *****
    What voltages and intensities of output will be obtained from a transformer with 50 turns in the primary. The input voltage is 20 volts. In the secondary there are 2 coils with 50 and 300 turns. R=5 ohms
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    Calculate the power that is used by a heater connected to 220 V if it has a resistance of 60 O.
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    Find the intensity which/that circulate in a device which consumes 440w if the voltage it receives is 220v
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    In our home we have a computer which is powered at 250 W and a lamp powered at 100 watts.How much will we have to pay the electrical company each month if the computer is used an average of 2h/day and the lamp 4h/day. Price= 0.1€ Kw.h
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    What ouput voltages and intensities will be obtained from a transformer with 100 turns in the primary, the input voltage is 20 volts. In the secondary there are 2 coils with 50 and 300 turns respectively? R=5O
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    Calculate the power consumed by a heater connected at 220 V if it has a resistance of 30 O
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    Calculate the intensity circulating in a device which consumes 200 W if the input voltage is 220 V

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  2. For everybody (to hear) or for nobody 🙂

    The movement of electrons (through a conductor)
    DC- Electrons always move in the same direction
    AC- The polarity is constantly changing

    Batteries produce electricity due to chemical processes
    Alternators due to mechanical systems
    Solar cells due to chemical processes too (The photovoltaic e’ffect)
    How quickly technology goes, time flies¡¡¡:
    http://news.bbc.co.uk/2/hi/technology/8483654.stm

    http://news.bbc.co.uk/2/hi/technology/8484823.stm
    Más expresiones de las que usamos en clase:
    Alternating Current (AC)
    Direct Current (DC)
    frequency
    Batteries: Rechargeables/Non Rechargeables
    Alternators
    ____________________

    Solar cells
    cathode
    anode
    Primary generators:Batteries/Non Rechargeables
    Secondary generators:Batteries/Rechargeables
    ————————————
    Batteries
    saline {seilain}
    coal barr/carbon
    zinc
    carcasse (but better shell)
    casing
    sawdust/salts (au)
    alkaline {ai}
    Manganese{i:}
    ‘oxide {ai}
    button cells batteries {‘bʌtn̩}
    mercury
    silver
    Lithium {θ}
    accumulators
    recharge
    Lead {led} “plumbum”
    electrodes
    Sulphuric/sulfuric acid {ju} Am.E.
    Niquel-cadmium
    Memory effect
    Ions
    Electrolite {lait}
    ==========================================
    1W=1V/1A Watt, Volt, Amp, Ampere/’æmpɪr/
    Electric Power
    Mechanical
    heat
    light
    Re’sistance
    magnet
    “Like poles repel and opposite poles attract”
    magnetic field
    electromagnet
    rotor
    stator

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  3. Buenas: Tal como hablemos en clase, he estado comprobando los enlaces y dejan todos copiar e imprimir. Ya me extrañaba porque en cursos pasados pudieron hacerlo, y no recordaba haber cambiado sus propiedades.
    Si alguno tiene un visor predeterminado, y le da problemas, probad a descargarlo y a abrirlo con el Adobe Reader o similar. Saludos.

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    • Siempre va a tener contraseña, Alejandro, no la puedo decir aquí, pregunta a cualquiera de tus compañeros, la misma de siempre, que no te enteras Contreras :-). Pero ya se puede imprimir que es lo que parece daba problemas a alguno. Saludos.

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  4. Lección /

    http://antoniocuestas.com/07_Unidad%2007_3ESO_TECNO.pdf


    La lección 7 en inglés, falta el final de la lección.
    Aquí resto, texto:
    Technical Project
    A technical Project is an organised plan of work which is carried out to create an object.
    The documents we use are:
    -Report. Where we justify the idea of the project, commercial and technical specifications of the product (materials, workings, dimensions, etc) and the innovations it will bring about.
    -Appendices: Where we can find other solutions, calculations, why we choose this solution and not others, legal specifications, materials, security measures, etc.

    Technical Drawings are the graphical representation of the object. It is very important to draw according to the rules.

    Process Sheets/Roadmap manufacturing and assembly show us the organisation and coordination of the tasks to carry out the project.

    The budget. In it we calculate the cost of all the factors included in the process.

    Design

    Design: where we determine all the characteristics of the object.

    Design has the following steps:
    The shape, the size and function
    Materials
    Aesthetic appearance
    Accessories and mechanical complements
    Environmental impact
    Safety measures
    Ergonomics

    CAD is very useful for designing because it is easier to draw the plans and we can simulate the working of the object so allowing us to verify designs without making the object.
    But, in general, we have to make up a prototype.

    You hear in the mass media or in conversations: This lamp is a designer object.
    All lamps (objects) have a design. More precisely it refers to an innovative or striking design.

    Work plan

    It is the successive order of the necessary operations to make up the object

    Planning allows us:

    -Calculate the time and organise the manufacturing.
    – Make sure materials and equipment needed are available at the appropriate time and place
    – Taking advantages of the available resources

    Planning is noted in the following docs:
    Process sheets/manufacturing sheets/ instructions for assembly.

    .
    Making up and verification of prototypes

    Prototype is the initial version of the object being made in order to test it in all aspects. When I worked in industry we designed an armoured vehicle and we checked it on the computer but we made a prototype.
    On the computer everything was ok but when we built and tested it we realised that the shock-absorbers vibrated uncomfortably so we had to change them.

    Divulgation

    The divulgation of a product has two sides/aspects:
    Technical divulgation and commercial divulgation
    Technical divulgation is carried out:
    a) Technical reports which include: characteristics, applications and improvements with respect to similar products.
    b) Presentations and exhibitions accompanied by written documents and audiovisuals, meetings and briefings
    c) Exhibition of the product in professional fairs

    Commercial divulgation
    Commercial divulgation is oriented towards presenting the product to the general
    public; in this case the usual publicity channels are used:
    catalogues or booklets, mass media, etc.
    In this phase even more money is spent than in all the other processes.

    This phase is very important because sometimes good products don’t sell well because of inadequate publicity or viceversa.

    PC is formed by the CPU, pheripheral devices (Input/Output) and devices for saving the information and software which make the computer work.

    Compartments for internal devices.
    Power Source/Supply-> Device which gives the proper/correct voltage to the different elements of the CPU

    – Electronic components, mother board

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