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beans computing

non-electronic digital systems based on manipulating beans according to simple logical rules.

digital systems

inspired by the beans computer, but going at a lower level.

the beans computer

the computadora de papel is also related as a beans-based, "higher level" computer.

computadora de papel

projects and prototypes

norpet is a proof-of-concept for ideas we have about beans computing in an 8x8 grid or board.

norpet

truth tables

we have only two classes of beans: black (1), and non-black (0).

these tables correspond to the NOT and NOR logical operations.

they show their possible inputs at their left, and their corresponding outputs to the right.

photo of the NOT and NOR truth tables, composed of beans in a greenish surface

NOT

NOT: the output is the opposite of the input. (table at the top left)

input: 0, output: 1
input: 1, output: 0

NOR

NOR: the output is black only when none of the inputs are black. in any other case, the output is non-black. (table at the center) nor

nor

inputs: 00, output: 1
inputs: 01, output: 0
inputs: 10, output: 0
inputs: 11, output: 0

if you look closely you'll see that NOT can be defined the same way as NOR.

by combining multiple instances of this logic operation, we could build any possible digital behavior.

incoming links