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Blue-Green Algae Runs Computer for Six Months

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Image: A container holding blue-green algae that powered a computer A computer has been powered for six months by blue-green algae contained in a tiny container. In the near future, similar photosynthetic energy producers might be utilized to power a variety of tiny gadgets without the usage of scarce and unsustainable materials like those used in batteries. Christopher Howe and his colleagues at the University of Cambridge made a tiny enclosure out of aluminum and translucent acrylic approximately the size of an AA battery. They put a colony of Synechocystis sp. PCC 6803 cyanobacteria – sometimes known as "blue-green algae" – inside, which create oxygen through photosynthesis when exposed to sunlight . During the shutdowns during Covid-19 pandemic in  2021, the device was put on a windowsill at the residence of team member Paolo Bombelli and stayed there from February to August. It ran an Arm microprocessor with a constant current between its anode and cathode. The compu

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