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    (Original post by lareneg)
    Last year*


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    http://www.dabs.com/products/lacie-2...2-0--74ST.html

    Yes guys, you too can be the proud owner of a levitating external hard drive.
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    Staying in the films theme...

    :teehee:
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    Does anyone know what the rectangular things are in this circuit diagram - http://img513.imageshack.us/i/comput...equestion.jpg/ ?
    Looks like a half xor or something...?

    From this thread: http://www.thestudentroom.co.uk/show....php?t=1524670
    I can't decide how much longer to go for. The fact that said person has no idea what logic gates are is ringing warning bells.
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    (Original post by Chrosson)
    Does anyone know what the rectangular things are in this circuit diagram - http://img513.imageshack.us/i/comput...equestion.jpg/ ?
    Looks like a half xor or something...?

    From this thread: http://www.thestudentroom.co.uk/show....php?t=1524670
    I can't decide how much longer to go for. The fact that said person has no idea what logic gates are is ringing warning bells.
    It's notr a way of displaying the circuti that I've come accross in the logic units that I've just done last term, but i think that it's a half adder, because the comparisons then create a circuit to show majority logic.

    Either way, he's got no hope of answering it if he doesn't recognise that the gate is an OR gate.
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    (Original post by Chrosson)
    Does anyone know what the rectangular things are in this circuit diagram - http://img513.imageshack.us/i/comput...equestion.jpg/ ?
    Looks like a half xor or something...?

    From this thread: http://www.thestudentroom.co.uk/show....php?t=1524670
    I can't decide how much longer to go for. The fact that said person has no idea what logic gates are is ringing warning bells.
    Tathrim's correct; it's a half adder. I've just got him told, though... he's got some serious problems if he doesn't know what a logic gate is.
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    (Original post by Mad Vlad)
    Tathrim's correct; it's a half adder. I've just got him told, though... he's got some serious problems if he doesn't know what a logic gate is.
    'Sup Vlad

    Having no knowledge of logic gates is certainly a bad thing. To be fair though, I only knew of the existance of AND, OR, NOT, NOR, NAND and XOR gates but that was all remembered from A level electronics
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    (Original post by kingrudding)
    'Sup Vlad

    Having no knowledge of logic gates is certainly a bad thing. To be fair though, I only knew of the existance of AND, OR, NOT, NOR, NAND and XOR gates but that was all remembered from A level electronics
    Hey dude

    Definitely.

    AND, OR, NOT, NOR, NAND and XOR is all there is, isn't there? :erm: Besides, any logic gate can be implemented with a combination of NAND gates.

    The half-adder is simply an XOR and an AND connected within 1 package, so it's more of a combinational logic device.
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    (Original post by Mad Vlad)
    Hey dude

    Definitely.

    AND, OR, NOT, NOR, NAND and XOR is all there is, isn't there? :erm: Besides, any logic gate can be implemented with a combination of NAND gates.

    The half-adder is simply an XOR and an AND connected within 1 package, so it's more of a combinational logic device.
    I see, that makes sense. It's been a long time since I did electronics, so I wasn't sure if I had just forgotton. I do vaguely recall how to make an NAND gate astable using a capicitor and a resistor.

    It's actually been around 3 years or so since I was here in the guise of wiwarin, so much has changed in that time. I swear that most moderators that were here have now left.
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    (Original post by kingrudding)
    I see, that makes sense. It's been a long time since I did electronics, so I wasn't sure if I had just forgotton. I do vaguely recall how to make an NAND gate astable using a capicitor and a resistor.

    It's actually been around 3 years or so since I was here in the guise of wiwarin, so much has changed in that time. I swear that most moderators that were here have now left.
    Bloody hell dude! I had no idea! How you doing!? :hugs:

    Yeah... things have changed a lot since then. Who'd have thought I'd have been modded, 3 years ago... :lolwut:
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    (Original post by Mad Vlad)
    Bloody hell dude! I had no idea! How you doing!? :hugs:

    Yeah... things have changed a lot since then. Who'd have thought I'd have been modded, 3 years ago... :lolwut:
    I am doing well thank you. I've recently got married actually and have sort of settled down into a proper job, rather than working at the cinema. How about yourself?
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    (Original post by kingrudding)
    I am doing well thank you. I've recently got married actually and have sort of settled down into a proper job, rather than working at the cinema. How about yourself?
    Congratulations!

    Got married and am now working many many hours while finishing my degree, as well as modding on here. :yep:
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    (Original post by Mad Vlad)
    Congratulations!

    Got married and am now working many many hours while finishing my degree, as well as modding on here. :yep:
    Congratulations.

    Seems like all of the old guard grew up and settled down. Do you know if Blissy and Daveo stayed together as I seem to recall they started going out?
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    (Original post by kingrudding)
    Congratulations.

    Seems like all of the old guard grew up and settled down. Do you know if Blissy and Daveo stayed together as I seem to recall they started going out?
    Thank you!

    They got married too, I believe
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    (Original post by Mad Vlad)
    Thank you!

    They got married too, I believe
    That really is amazing. There are so many people who have left that I remember. One really big shock though was that Dazya was not only tamed, but actually is respectable.
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    (Original post by kingrudding)
    That really is amazing. There are so many people who have left that I remember. One really big shock though was that Dazya was not only tamed, but actually is respectable.
    Indeed.
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    (Original post by Tathrim)
    It's notr a way of displaying the circuti that I've come accross in the logic units that I've just done last term, but i think that it's a half adder, because the comparisons then create a circuit to show majority logic.

    Either way, he's got no hope of answering it if he doesn't recognise that the gate is an OR gate.
    (Original post by Mad Vlad)
    Tathrim's correct; it's a half adder. I've just got him told, though... he's got some serious problems if he doesn't know what a logic gate is.
    Ah right, I'm used to it being completely broken down into gates. So the entire thing appears to be a full adder then (?)
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    (Original post by Chrosson)
    Ah right, I'm used to it being completely broken down into gates. So the entire thing appears to be a full adder then (?)
    Nope, it's a majority logic circuit using two checks. (i.e. the first half adder outpus a result to the or gate to say that the value of the majority of inputs is 1 if both A and B are 1, or sends a one to the other half adder, whcih is checked against K).
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    (Original post by Tathrim)
    Nope, it's a majority logic circuit using two checks. (i.e. the first half adder outpus a result to the or gate to say that the value of the majority of inputs is 1 if both A and B are 1, or sends a one to the other half adder, whcih is checked against K).
    Oh dear, fail observational skills
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