2 layers379 × 165.1 mm

HexPerTerminal
ForgottenMachines/Entrex
The technologies documented here will include all like-kind systems manufactured by Nixdorf, Redifon, ROCC & Mera, all originally designed by Entrex Inc, Burlington, MA USA.
90 parts1
Boards in 1 GitHub repository, designed in KiCad, that use the SN7407D by Texas Instruments (0.25mA 0℃~+70℃ 1 4.75V~5.25V 40mA 6 7400 Open Collector Unidirectional SOIC-14 Buffers, Drivers, Receivers, Transceivers ROHS). See how each wires it, with its parts, size, README and files; the SN7407D’s symbol, footprint and pinout are on its own page.

ForgottenMachines/Entrex
The technologies documented here will include all like-kind systems manufactured by Nixdorf, Redifon, ROCC & Mera, all originally designed by Entrex Inc, Burlington, MA USA.