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Subject: 
Re: mechanical XOR and Half Adder
Newsgroups: 
lugnet.technic
Date: 
Fri, 10 Mar 2006 14:32:51 GMT
Viewed: 
6993 times
  
In lugnet.technic, Martin Howard wrote:
   In lugnet.technic, Ross Crawford wrote:
   In lugnet.announce.moc, Martin Howard wrote:
   Hi all,

I’ve finally updated my mechanical logic gate pages with a couple of new (ish) creations. The XOR gate and the Half Adder. You can find them by going to http://www.goldfish.org.uk/xor.html and http://www.goldfish.org.uk/halfadder.html.

Nice work Martin! I’d point out a typo in the text for your 1/2 adder though - you say “1+1 = 1, carry 1”, the sum should be 0 :)


Thanks for the comments and pointing out the typo.

Martin

Well, technically, 1 + 1 = 2, or in binary, 1 + 1 = 10. The sum isn’t 0, the S output is 0.

‹/nitpicks›

This stuff is cool. I like your mechanical logic gates better than the pneumatic ones I’ve seen. Yours are definitely cheaper to build.



Message has 2 Replies:
  Re: mechanical XOR and Half Adder
 
So basically, when designing a mechanical walker, the use of these types of adder/half adder creations is to see how the machine will walk? I ask because I have never built a walker. (18 years ago, 12-Mar-06, to lugnet.technic, FTX)
  Re: mechanical XOR and Half Adder
 
(...) Not in fixed digit maths. In a 1 digit binary adder, 1+1 = 0, just as in a 4 digit decimal adder 5000+6000 = 1000. (...) LOL definitely. ROSCO (18 years ago, 12-Mar-06, to lugnet.technic, FTX)

Message is in Reply To:
  Re: mechanical XOR and Half Adder
 
(...) Thanks for the comments and pointing out the typo. Martin (18 years ago, 9-Mar-06, to lugnet.technic)

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