File:ColecoVision Expansion Module 2 schematic (KiCad redraw).pdf

A one-sheet redrawing in KiCad of the ColecoVision Expansion Module #2 board: battery leads J100 (red, +) and J101 (blue, −); a switch made of Q1 and Q2 (ST1702M) and Q3 (2N3906) that connects the battery to the logic; U2, a dual photo-interrupter with its LEDs fed through R4 (82 Ω); U1, an HEF4093B quad Schmitt NAND, squaring the two sensor outputs; diodes D2 and D3 to the controller cable's white and violet wires; the accelerator pedal switch leads J6 (black) and J7 (red) through D1 to the dark blue wire; spark gaps E1 and E2; C1 (100 nF). A table maps the 9-pin plug's pins 3, 6, 7, 8 and 9 to wire colours. PDF metadata dates it to April 2020. A community redrawing, not a Coleco document.

colecovisionadam.com Documents page, file Documents/Manual/ExpansionModule2-Schematic.pdf, listed as "Expansion Module 2-Schematic" (retrieved 2026-10-19).

Not recorded at the source.

No licence is stated at the source. Hosted for repair reference, with the source cited.