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Digi-Comp 1

The Digi-Comp 1

List Price: $4.99

Release Date: 1963

he DIGI-COMP 1 is a functioning, mechanical, digital computer that was sold in kit form. It was originally manufactured from polystyrene parts by E.S.R., Inc. starting in 1963 and sold as an educational toy for US$4.99.

The DIGI-COMP I contains three mechanical flip-flops that can be interconnected using thin vertical wires that are either pushed or blocked from moving by a number of cylindrical plastic tubes. The computer was ‘clocked’ by moving the “CLOCK” lever on the right side back and forth. Different configurations of the plastic tubes caused the Digi-Comp to compute different Boolean logic functions. The three binary digit readout of the state of the flip-flops showed the state of the binary logic and could be used to demonstrate operations such as addition and subtraction.