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Science Festival 2011 Science Festivel 2011

Type of Event:	Event
From:	2011/11/10 08:00:00 AM
Till:	2011/11/13 07:00:00 PM
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Organizer:	mnhn
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Attendees:	Nick17, Kwisatz Log-in to RSVP
Contact Person(s):	Gunstick (mail)
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Where:	MNHN, Luxembourg (25, rue Münster, L-2160 Luxembourg, Luxembourg)
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Mechanical Logic: build logic gates from LEGO and see a mechanical binary calculator do its work

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Participants

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build	9th (setup)	10th	11th	12th	13th (includes teardown)
				kwisatz	kwisatz
nick17	nick17	nick17	nick17	nick17	nick17
Gunstick	Gunstick	Gunstick	Gunstick	Gunstick	Gunstick
iThierry	?	?	iThierry	iThierry	iThierry
Kris
NPU				NPU	NPU
Guy
Pascal
	?	Lala	Lala	?	?

Logic gates

See also the wikipedia article on adders

Same logic, a bit rearranges and replaced the first full adder with a half adder. Note that the carry dost not really need to be connected completely to the left.

Lego

Copper

Half adder built out of copper. The marbles replace the fingers pushing the buttons of the Lego version. The marbles will propagate the bit flow to the next logic gates. In the middle you can see the XOR-AND mechanical combination as known from the Lego version which does the logic. The marbles flowing into the input are "lost", like in a real logic circuit. And new marbles are released at the bottom depending on the logic decision.