LEGO TECHNIC : 10608


Technic / 10608	10607 \| 10609

Subject:	Re: Binary Pneumatic addition with two pistons
Newsgroups:	lugnet.technic, lugnet.robotics
Date:	Mon, 9 Jun 2003 18:14:02 GMT
Viewed:	1110 times

Kevin L. Clague wrote: > In my continued quest to develop pneumatic computing capabilities (what can I > say, I'm a geek), I created a combination AND and exclusive or (XOR) gate using > two pistons and five switches. This combination lets me add to bits using just > two pistons, 1/3 of the pistons used by me previously. Hey Kevin. Big fan here. I'm not sure if anyone has ever observed this before, but if one is only ever wants the pneumatic switch to be at one of the two extreme ends, it appears as if the LEGO pneumatic switches behave exactly like electrical SPDT relays. Since Kevin seems keen on making logic gates from pneumatics, it got me thinking... and I know it's possible to make Two-Input AND, NAND, OR, and NOR gates from 2 relays, and a Two-Input XOR gate from 4 relays if no floating output state is desired, or 2 relays for the XOR gate if one wants one of the output states to be floating. Has anyone else ever tried doing mappings like this to see how well they work in practice? I realize that if no floating states are desired for pneumatics, one would need both a positive and negative air pressure supply, but that shoudln't be too difficult, should it? With enough pneumatics, one could even build an entire air-powered computer! Geeze, I wish I had the pneumatic components to try some of the stuff I've seen here out. >> Mark

Message has 1 Reply:

		Re: Binary Pneumatic addition with two pistons
(...) Hi Mark, (...) I've maded two pneumatic adding machines ((URL) and I can attest that it works quite well. With LEGO Pneumatics, the pistons are double acting. They have a port to make them expand as well as port to make them contract. This is (...) (21 years ago, 9-Jun-03, to lugnet.technic, lugnet.robotics)

Message is in Reply To:

		Binary Pneumatic addition with two pistons
In my continued quest to develop pneumatic computing capabilities (what can I say, I'm a geek), I created a combination AND and exclusive or (XOR) gate using two pistons and five switches. This combination lets me add to bits using just two pistons, (...) (21 years ago, 9-Jun-03, to lugnet.technic, lugnet.robotics)

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