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Understanding Electronics Basics #2

Discussion in 'General Electronics Chat' started by cowboybob, Mar 26, 2012.

  1. Muttley600

    Muttley600 New Member

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    eek! Looking at that, I don't think your gonna learn a lot watching me, how complicated does that look.lol

    Glad your still around CBB, as you can see, my first go doing something new didn't go that well, which I will take as a positive as it leaves plenty of room for growth.lol

    2am & can't sleep for thinking about work, think I need a less stressful job

    So what is a tube, a CRT?
     
    Last edited: Apr 17, 2012
  2. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

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  3. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

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    OK, here is an easy problem:


    and another

     
    Last edited: Apr 17, 2012
  4. dave

    Dave New Member

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  5. Muttley600

    Muttley600 New Member

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    Interesting read, so does that loosely work in same way as a bulb? But for different applications.
    I got as far as reading about diodes then actually realised I knew what they were talking about, you guys did a good job on my basic understanding
     
  6. Muttley600

    Muttley600 New Member

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    10^1 = 10

    Same for next one as well as '0' = 1 & 1 changes nothing

    I see I'm not understanding something here, the base & ^ = but when you get more than one side by side or *
    I can't see how we add the ^ but not the base

    Is above answer right? & if we had two different bases, would we also add those or then treat them individually?
     
    Last edited: Apr 18, 2012
  7. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

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    That answer is right. Remember that 10^0 is 1. the base^0 is always 1. You just have to remember it.

    remember that side by side, Parenthesis ()(), the "*", something that looks like an x but usually thinner, and even a "dot" centered all mean multiplication.

    If there were two different bases, e.g. (2^3)(2^4)(10^2)(10^3) then the best you could do is (2^6)(10^5) before getting the real answer of 6400000.

    The BASES have to be the same when adding the exponents when multiplying.
     
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  8. Muttley600

    Muttley600 New Member

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    I have actually realised where I went wrong here in my learning, I skipped +,-,/& *
    Who can't do that..........right *blush*

    Never mind, let's try a few more
    Then how do we decide what to use logs on, & is log10 the one mainly used
     
  9. Muttley600

    Muttley600 New Member

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    So the base is just signifying the counter we are using
    0 of 2 counter = 1 hence second base just saying use the same counter

    I see it what I wasn't getting :)
     
    Last edited: Apr 18, 2012
  10. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

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    In some respects, the base is one less than you can count to.
    e.. 2 [0,1]
    4 [0, 1, 2, 3]
    8 [ 0, 1,2,3,4,5,6,7]
    16 [0,1,2,3,4,5,6,7,8,9,a,b,c,d,e,f]

    We can basically have any base, say even 131, but you would need 131 different symbols to represent a digit.

    It doesn't always work, but it gets the point across for all but base e.

    -----

    You still have this problem to do:

     
  11. Muttley600

    Muttley600 New Member

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    I thought I had, if 0 = 1 & 1 changes nothing, surely it is still
    10^1 or 10

    You questioning me is making me think it should be 10^3 or 1,000
    But I'll stick with my original answer & accept I'm wrong

    I'm going to spend the morning reading & practising this subject so at least I'll hopefully have a better understanding :)
     
  12. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

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    I can't believe you got it wrong. Try again. I must be good at making up questions. PS: Spent the evening making 5 pints of pickles.
     
    Last edited: Apr 19, 2012
  13. Muttley600

    Muttley600 New Member

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    I'm on the case [​IMG]

    Morning KISS, you make fresh pickles, how long would they last you then, bit addictive aren't they

    ok, I see where I'm going wrong here as well

    1^8* 1^150 = 1

    This is where I'm getting my 1's mixed up, if base is 1, it is never going to change, I was using this for 10^0*10^0*10^0

    but it is, 10^3 or 3√10 or 1,000 (add three zeros)
     
  14. Muttley600

    Muttley600 New Member

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    found a really good link for the likes of me [​IMG]

    Now leaning math off same site as link, hopefully be able to speak your language soon & pick your brains if I run into trouble :)
     
    Last edited: Apr 19, 2012
  15. cowboybob

    cowboybob Well-Known Member Most Helpful Member

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    I've heard that this guy Kahn is really good over an incredible range of topics. Course, KISS is no slouch, but, as they say, "any port in a storm" (US Navy talk...).
     
  16. Muttley600

    Muttley600 New Member

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    Well, I understand what they are on about with regards tyo negitive numbers now [​IMG]

    hopefully cover decimals then work out that sum KISS said I wouldn't get, can't think why [​IMG] this is like being back at school, but this time I want to know whats what

    Hoping to get some basic ideas into this head of mine so I'll at least have a chance of giving the right answer, you know me, I might fail a thousand times but at attempt 1001, I'll get it

    TBH I really never expected all this but it is really interesting as there is an end goal, I've covered 26 topics so far with only 3 million left to go [​IMG] & I can't even see algebra in there
     
  17. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

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    What's wrong with the above?

    The pickles never last very long.
     
  18. Muttley600

    Muttley600 New Member

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    The 3√10, you don't miss a trick do you

    I'm saying that because I'm guessing a cubed root is not shown like that but I don't know how to get the little 3 in the front part of the ticky bit (my technical term for it.lol)

    Just been out for one of the best meals I've eaten in my life so far, why is it when you get dressed up & expect a great night out, it is normally a let down, yet I went out tonight in scruffs, nothing to celebrate & it's been great :)

    Edit: always check your calculator before guessing what the problem is, that symbol is dividing 10 by 3 not * it

    http://www.khanacademy.org/exercisedashboard

    Im hoping link will show you how far I've got, not even really scratched the surface but I started from scratch, I didn't think it too bad for a days playing. If you cant see yellow stars in map, I may have to alter page to public so you can track my progress
    If your interested in how little I really know?
     
    Last edited: Apr 19, 2012
  19. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

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    3√10 is 3 multiples by the square root of 10. e.g. 3*sqrt(10)

    if your trying to write this:


    You can write it as 10^(1/3). That is the same as the cube root of 10. 10^(1/2) is the same as the √10.
     
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  20. Muttley600

    Muttley600 New Member

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    So I was right in thinking afterwards that it is not the same as 10^3 (because it's divided rather than to the power of)
     
  21. KeepItSimpleStupid

    KeepItSimpleStupid Well-Known Member Most Helpful Member

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    Yes,



    You can write it as 10^(1/3)

    It is 10 to the power of, but the power is a fraction.

    is mathematically valid. Not common though.

    PS: 1 pint of the pickles is history
     

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