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About: Digi-Comp II     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatEducationalToys, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: yago:WikicatMechanicalComputersyago:Artifact100021939yago:Computer103082979yago:Device103183080yago:Instrumentality103575240yago:Machine103699975yago:Object100002684yago:PhysicalEntity100001930yago:Plaything103964744information applianceyago:Whole100003553yago:WikicatEducationalToys New Facet based on Instances of this Class

The Digi-Comp II was a toy computer invented by John "Jack" Thomas Godfrey (1924–2009) in 1965 and manufactured by E.S.R., Inc. in the late 1960s that used 1⁄2 inch (12.5 mm) marbles rolling down a ramp to perform basic calculations. A two-level masonite platform with blue plastic guides served as the medium for a supply of marbles that rolled down an inclined plane moving plastic cams as they went. The red plastic cams played the part of flip-flops in an electronic computer - as a marble passed one of the cams, it would flip the cam around - in one position, the cam would allow the marble to pass in one direction, in the other position, it would cause the marble to drop through a hole and roll to the bottom of the ramp. The Digi-Comp II platform measures 14 by 28.5 inches (36 cm × 72 cm).