Binary Numbers / dichotomous sorting Set
by SuperInfraMan
Printable files (8)
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stl10100_20card.stl
139 Ko · 897 downloads
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stl
blankcard.stl
150 Ko · 894 downloads
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stl
10100_20_examplecard.stl
139 Ko · 879 downloads
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stl
sortinglid.stl
276 Ko · 881 downloads
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stlFalse_0_key.stl
48 Ko · 879 downloads
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stl
True_1_key.stl
35 Ko · 893 downloads
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stl
resizedFalse_0_key.stl
48 Ko · 862 downloads
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stl
resizedTrue_1_key.stl
35 Ko · 862 downloads
Description
This is a set of cards, sorting lid, and keys to teach binary numbers from 0 to 31 OR to use to teach the concept of sorting via dichotomous key with T/F, Y/N questions.
The long square keys are for True or 1 bits, the long cylindrical keys are for False or 0 bits.
Print 5 each of the T and F keys, one sorting lid, and 32 blank cards, then use diagonal cutters to cut either the square "True" or "1" or "Yes" notches, or the "False" or "0" or "No" notches, out of the upper edge of the cards. An example "10100" or "decimal 20" card is included as an example. (you could design and print 32 different kinds of cards, but really, it's easier to just print them all blank and cut them.)
Obviously this is a very simple example of something with a very long history: Jacquard looms, Hollerith cards, the McBee keysort system, etc. This is a simple intro to the concept.
With a change in scaling this could also accomodate standard index cards, punched with a one-hole punch.
EDIT: finally got to print a trial of this, uploaded resized T and F keys that should fit better in the card slots to allow freer movement.
OH NO- problem with the printer, interfering with optimizing this design and getting example prints made. This will be addressed as soon as I'm printing again.