Fig. 7
From: Marimo machines: oscillators, biosensors and actuators
Logic gates based on Marimo: (a) NOR (b) AND (c) OR (d) NAND (e) XOR. The Marimo are represented with green balls. The floats are represented by orange and/or black circles. The black section of a float is opaque, while the orange section is transparent. The input signals are shown as A, B, C, or D. The output signal is observed by sensor F1 or F2. An ‘always-on’ light sources is portrayed by a black box