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In lugnet.technic, Mark Tarrabain wrote:
> Kevin L. Clague wrote:
> > Great job Mark! Isn't it great when those optimizations just hit you?
>
> It sure is. Thanks.
>
> Using the same pattern (setting up specific switches "backwards"), I can
> do a half adder with two pistons and 4 switches (2 switches on each
> piston). Again, no need for inter-piston bracing, just the requirement
> that a piston simultaneously slide all the switches attached to it.
Finally I can compete again! ;^)
I can do a half adder with 1 piston and seven switches, plus you get dual
polarity pressure. Three switches for AND and four for XOR. This says that I
can do single pressure logic line with one piston and three switches.
I've really been enjoyng the comradere and subtle competition, but in particular
the idea exchange over the last month or so. I'm glad you joined the discussion
(well probably more like monolog ;^)
>
> http://www.members.shaw.ca/markt1964/halfadder.jpg
>
> > > Mark
Kevin
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Message has 1 Reply:
 | | Re: A better full adder!
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| (...) AND takes 1 piston + 1 switch using your design. XOR takes 1 piston + 2 switches using my design. OR takes 1 piston + 2 switches using my design. But AND and XOR can be done using the same piston, so 1 piston + 3 switches gets you a half (...) (21 years ago, 26-Jun-03, to lugnet.technic, lugnet.robotics)
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Message is in Reply To:
| | Re: A better full adder!
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| (...) It sure is. Thanks. Using the same pattern (setting up specific switches "backwards"), I can do a half adder with two pistons and 4 switches (2 switches on each piston). Again, no need for inter-piston bracing, just the requirement that a (...) (21 years ago, 26-Jun-03, to lugnet.technic, lugnet.robotics)
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