Magnetic logic gates

Discussion in 'Off-Topic' started by magnet18, Jan 1, 2013.

  1. magnet18

    Thread Starter Senior Member

    Dec 22, 2010
    Sparky49 likes this.
  2. Sparky49

    Well-Known Member

    Jul 16, 2011
    That is really cool!

    I must say, I really love looking at stuff to do with electronics from that era. The whole "unknown" - where will the electronics of tomorrow be?

    They did not know wether or not transistors, magnetic logic, or whatever would be king. Just lots of research into so many beautifully interesting areas.

    I'm itching to get to university. I want to do something.

    And no. Differential equations do not count.:p

    Great video. If I had an account I would subscribe.

    I think you could do with making some videos. ;)
  3. praondevou

    AAC Fanatic!

    Jul 9, 2011
    Very interesting indeed!

    I think you have been aware of it though, it's the rest-magnetism any ferromagnetic material holds after being subjected to a magnetic field.

    Just a little comment to the statement "the flux doesn't increase anymore when the core is saturated"

    When the core saturates, i.e the B-H curve flattens out, it is NOT really flat. B continues to rise when H is increased. It's explained here: or a little more in detail here:
  4. Papabravo


    Feb 24, 2006
    Magnetic cores were the memory of choice when I first learned programming (FORTRAN -1962). Yes they did retain their contents when the power was removed.
  5. Wendy


    Mar 24, 2008
    Then there was the magnetic bubbles of the 80's, they were vaguely similar to SD card, but the data was read sequentially as the bubbles were shuffled inside the device.
  6. magnet18

    Thread Starter Senior Member

    Dec 22, 2010
    Yea, I just think it's cool that in lieu of silicon a properly wound transformer with the right hysteresis properities and a couple basic components can form things like an inverter or an AND gate.
    It knowing how to do it on a whim would be a good skill to have

    I could only imagine looking in at a computer mainframe in a parallel universe and seeing rows and rows and rows of little transformers :D