LEGO TECHNIC : 10785


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Subject:	The latest rage in pneumatic computing
Newsgroups:	lugnet.technic, lugnet.robotics
Date:	Sat, 21 Jun 2003 21:30:23 GMT
Viewed:	1030 times

I created Mark Tarrabain's single pressure/single piston AND gate and have it all four possible input states. In this case I use rubber bands to compress the pistons, but this is not the only way to compress the pistons. http://www.brickshelf.com/gallery/kclague/Computing/mt-and-kmap.jpg Here is a picture of my additions to Mark's gate to make single piston/dual pressure (works well with dual acting LEGO pneumatic pistons) AND gate. By adding the two switches, I can create the pressure to close the pistons (without using rubber bands). http://www.brickshelf.com/gallery/kclague/Computing/klc-and-kmap.jpg Here is my single piston/dual pressure OR gate. Same mechanics as the AND gate, but with different connections. http://www.brickshelf.com/gallery/kclague/Computing/klc-or-kmap.jpg Here is my single piston/dual pressure XOR gate. http://www.brickshelf.com/gallery/kclague/Computing/klc-xor-kmap.jpg The AND and XOR can be driven by the same piston, so a full binary adder can be created with three pistons, and 17 switches. Unfortunatly for me Mark can perform the same addition with 3 pistons and 13 switches plus rubber bands, or 3 pistons and 14 switches (one extra one to pressure the gates closed.) PLUKWYT Kevin

Message has 2 Replies:

		Re: The latest rage in pneumatic computing
"Kevin L. Clague" <kevin_clague@yahoo.com> wrote in message news:HGup2n.7Jv@lugnet.com... (...) it (...) compress the (...) piston/dual (...) By (...) (without (...) gate, (...) can be (...) 13 (...) Good work, Kevin! I have not worked with AND OR (...) (21 years ago, 21-Jun-03, to lugnet.technic, lugnet.robotics)

		Re: The latest rage in pneumatic computing
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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