Subject:
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Re: The latest rage in pneumatic computing
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Newsgroups:
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lugnet.technic, lugnet.robotics
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Date:
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Sun, 22 Jun 2003 10:12:13 GMT
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Viewed:
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227 times
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In lugnet.technic, Mark Tarrabain wrote:
> Wow. Thank you so much for the acknowledgement, Kevin. I am genuinely
> flattered.
Well, I didn't invent the single piston gate. I give credit where credit is
due. As I said in a previous post. Your single piston AND gate design was
inspirational.
I talked myself out of this in the past because I could not figure out how to
get a differntial pair out of the deal *and* make sure it had a release. What I
realized after thinking it through is that the gate itself didn't have to have a
release, just some switch upstream had to have a release.
Combining your AND with the mux I created a couple of weeks ago got me the NAND
half of the differntial gate.
>
> I've got a bitmap made of the schematic for my 13 switch full adder.
> It's strictly representative, and not meant to imply how the switches
> would be positioned in the final mechanism. Hopefully it's
> comprehensible to other people.
>
> http://www.members.shaw.ca/markt1964/fulladder.jpg
>
> I've color-coded the various portions of the tubing because the
> "spaghetti wiring" I've drawn here would probably be completely
> unreadable otherwise.
>
> The idea is that each group of switches that is grouped together on a
> single box would be ganged together onto a single piston, requiring a
> total of three pistons. The switches would be hooked up to the pistons
> such that when air is applied to the piston attached to it, the switch
> would slide "upwards" as it appears in the diagram. A mechanism to do
> this is simple to build -- Kevin's implementation of my one-piston AND
> gate would be a viable starting point for each switch set. Anyways,
> each set of switches could be ganged onto a piston and positioned
> anywhere that is convenient for the model, all that's really required to
> connect between them is pneumatic tubing.
Mark, each switch in your diagram has three ports. To understand your diagram I
need to know which port is which.... Is the bottom port the inlet, and the top
two the outlets?
>
> BTW, I'm really thinking that this sort of mechanism (one or more
> switches ganged onto a piston which simultaneously flips all the
> switches one way or the other) probably qualifies as a LEGO design
> pattern (to borrow some terminology from software design), but I don't
> know if anyone's ever given the design pattern an actual name. Any ideas?
>
> > > Mark
Kevin
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Message has 1 Reply:
Message is in Reply To:
 | | Re: The latest rage in pneumatic computing
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| Wow. Thank you so much for the acknowledgement, Kevin. I am genuinely flattered. I've got a bitmap made of the schematic for my 13 switch full adder. It's strictly representative, and not meant to imply how the switches would be positioned in the (...) (21 years ago, 22-Jun-03, to lugnet.technic, lugnet.robotics)
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