Subject:
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Re: YAPNQ
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Newsgroups:
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lugnet.technic
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Date:
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Sat, 14 Jun 2003 18:01:17 GMT
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Viewed:
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880 times
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Rob Stehlik wrote:
> Actually, I have used aquarium tubing and one way valves before. There is
> 'miniature' airline tubing for aquariums that I think fits with Lego pneumatics.
> It is much stiffer than the official silicone tubing though. But this miniature
> airline comes with adapters that can be used to connect Lego pneumatic tubing to
> regular aquarium airline tubing.
Know where I can find those adapters? That would certainly be helpful.
> I used a couple of the one way valves to build
> a vacuum pump before I realized Lego made an official part that does the same
> thing. Too bad it went out with the old pneumatics system. These valve blocks
> can still be bought on bricklink though
Yeah... there's only a handful of used ones left though. I'd like to
find a place where I can get a ongoing supply of check valves. I have
more than a few ideas that I want to try out when I get the chance.
And on a related note, here's my own latest versions of one-switch,
one-piston pneumatic "AND" and "NOT" gates. View the following ascii
diagrams in a monospaced font:
AND
Switch
|----|
| O-----> #1 AND #2
| O----- <-- Input #1
O---| O----** <-- Put a plug here to stop air-flow
|=| |----|
| |
| |
|_|---------- < Input #2
Piston
NOT
Switch
|----|
| O----** <-- put a plug here to stop air flow
| O----- <-- Steady air supply
O---| O----> NOT #1
|=| |----|
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|_|---------- < Input #1
Piston
In both cases, the switch and the piston are braced together so that
when the piston is retracted, the switch is all the way down and when
the piston extends, the switch goes all the way up. The pistons will
need rubber bands on them to force them to retract when no input is
provided or else you can apply pressure to the other end of each
cylinder to reset them.
BTW, two instances of the NOT gates above should be possible to chain
together to create a NOR gate.
>> Mark (a man with visions bigger than his budget)
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Message has 2 Replies:
 | | Re: YAPNQ
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| In lugnet.technic, Mark Tarrabain wrote: <snip> (...) Looking good Mark. It computes. I had not thought about driving the source of the switch as one of the inputs, or I tried it early on and gave up. Kevin (...) (21 years ago, 14-Jun-03, to lugnet.technic)
| | | Re: YAPNQ
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| In lugnet.technic, Mark Tarrabain wrote: <snip (...) Mark, I am impressed with this concept, and wanted to see if I could eliminate the rubber bands and get back to a differential pair (standard LEGO pneumatic) setup. To create the complement (in (...) (21 years ago, 19-Jun-03, to lugnet.technic)
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Message is in Reply To:
| | Re: YAPNQ
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| (...) Actually, I have used aquarium tubing and one way valves before. There is 'miniature' airline tubing for aquariums that I think fits with Lego pneumatics. It is much stiffer than the official silicone tubing though. But this miniature airline (...) (21 years ago, 14-Jun-03, to lugnet.technic)
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