knex creations - Binary half adder

 Ah, what an interesting knex machine, (and what a pain to edit out the margin of the photo area)

Going by the title, you have probably guessed its some kind of half adder of base 2, well yes, but technically there are two in this thing.



besides being by far my most tedious knex creation (in both size, complexity, and sensitivity)
it does work, and with not even a rubber band. 

you might notice that its not exactly stable per say. 😛



 
 Ah here we have a nice logic diagram. the half adder works the same way.

this is definitely a case of functional knex art. 


"how is it art?" well its art because i say it is, and its not exactly that reliable, and can only add up to 2, so its more of a conversation piece than anything else, 😆)

DIY - notepad

Overview:

This thing started with me looking at a spare roll of adding machine paper. and looking at a unfinished knex light stand. so i got to work and wound up with this thing. It even has a nice pen holder. behind the board the paper just dips down in a loose "U" pattern. the paper roll is held in sync with the crank with two knex wheel pins.  And to top it off, its even wall mounted.