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Brian H. Nielsen wrote:
> While working with Mark's full adder design, the XOR gate in particular, I
> found something which may be useful in some pneumatic constructions.
Egad! Another madman joins the fray! ;)
> In Mark's fulladder http://www.members.shaw.ca/markt1964/fulladder3.jpg
> consider just the XOR gate (the 3 switches on the piston on the right). There
> are actually 3 outputs from the XOR gate. The bottom switch outputs AND, the
> middle switch outputs XOR, and the top switch would output NOR if it weren't
> plugged up. These 3 functions are mutually exclusive and one and only 1 will
> always be true. This can be used to retract pistons attached to the outputs
> whose values are false.
>
> Setup just the XOR gate and connect each output to the expansion port of a
> piston. Now, with the 3 pistons in compressed mode connect the 3 compression
> ports all to the same T, forming a closed system on the compression ports. Now
> when the XOR gate is pressurized one piston will be forced to expand and create
> positive pressure in the other pistons compression ports causing them to
> retract.
Am I misunderstanding you or are you suggesting that the pressure
created by the expansion of one piston would actually be sufficient to
compress *TWO* others? Unless the pistons had no loads at all, I'm not
sure if that would really work.
>> Mark
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Message has 2 Replies:
 | | Re: A better full adder!
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| (...) I think the idea here is that they are mutually exclusive - only one will be expanded at any one time, so when a different one is expanded, it effectively only has to retract one other - the one that was previously expanded. ROSCO (23 years ago, 1-Jul-03, to lugnet.technic, lugnet.robotics)
| | | Re: A better full adder!
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| (...) I've alway found low level circuit design interesting. Using pneumatics and LEGO pieces to create them seems like a good challenge. I have some ideas that might turn into workable designs. (...) I've tested it, and it does work. I don't know (...) (23 years ago, 1-Jul-03, to lugnet.technic, lugnet.robotics)
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Message is in Reply To:
| | Re: A better full adder!
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| (...) While working with Mark's full adder design, the XOR gate in particular, I found something which may be useful in some pneumatic constructions. In Mark's fulladder (URL) just the XOR gate (the 3 switches on the piston on the right). There are (...) (23 years ago, 1-Jul-03, to lugnet.technic, lugnet.robotics)
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