Subject:
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Re: Brickfest Pneumatic Master and new Pneumatic Gate Circuits
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Newsgroups:
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lugnet.technic
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Date:
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Sat, 27 Aug 2005 11:38:57 GMT
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Viewed:
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4657 times
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In lugnet.technic, Sigurd van Strakenburg wrote:
> > It is the N-input differential output AND gate, developed from your sketch.
> > I've used 2 switches for A,
>
> whan you use them in this way you better can use 1 switch becouse the air wil be
> free to the admosfer alround it whane the swich is compleetly swiched, isn't
> it?...
>
> a sugest to make a construction whare one switch is in the senter and the other
> is en one direction. just like kevin did here
> http://www.brickshelf.com/cgi-bin/gallery.cgi?i=422083
>
> and if you do it this way you can build a an gate whit just 2+2++2 switches
> isn't it?...
>
> corect me if i'm wrong
>
> sigurd
I don't quite understand what you're getting at, but I don't see how two
switches back to back, offset from each other and switching the same signals
would help.
I can see some optimistation in my earlier diagram, removing one switch from A
to make it a 1+4++4 gate. Three switches are necessary on the OR side of B so
that neither the signal from A nor the supply can ever leak.
Having experimented further on paper with a 3-input gate (1+4+4), it's possible
to make the output cylinder rise on any combination of 1, 3, 5 or 7 of the 8
possible input states. Swapping the hoses between B and C stages moves from
output high in 1 state to output high in 3 states, swapping the output moves
from 1 to 7 and swapping both gives 5. Output high in 2, 4, or 6 states
requires either a reverser from the exclusive OR gate, or a redundant variable.
In summary it is now possible to set a differential output gate to be high in
any combination of any number of the three input states.
Time to draw this up!
Mark
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