cmm2-jlc

Colour Maximite 2 - JLC-ready design

Overview

This is a open-source hardware clone PCB of the Colour Maximite 2 computer.
It's fully compatible to the original firmware and software.

• Designed for automated assembly at JLCPCB, everything except the connectors can be machine assembled.
• USB-C port (instead of USB-B) for serial and power
• microSD socket instead of full-size SD socket
• STM32 and SDRAM directly onboard, no expensive evaluation board needed

Bill of materials

Interactive BOM

Description	Part No.	Links
3.5mm audio jack	XKB PJ-3270	LCSC
microSD socket	HOAUC HYC77-TF09-200	LCSC
USB-C connector	Jing C167321	LCSC
USB-A connector	Jing C42650	LCSC
40pin IDC	BOOMELE C9138	LCSC
VGA connector	CONNFLY DS1038-15FBNSiA74-0CC	LCSC

Footprint credits

Author	Components
Tobias Schramm	CR2032 Holder, 3.5mm Audiojack, MicroSD socket, reset button
Jan Henrik Hemsing	Nunchuck connector

Rev.A Errata

• Missing mounting holes
• SDRAM pinout is missing A12 line (causes instability, fixed in Rev.B, workaround with enamelled copper wire of the same length as the other traces)
• SRV05 diode package had the Pin 1 indicator at Pin 6.
• Nunchuck footprint is reversed

Rev. B Errata

• KiCad Bug caused data corruption in PCB files, board files were reset back to pre-RevA state (missing via stitching). Will still work.
• SRV05 diode package had the Pin 1 indicator at Pin 6.
• Nunchuck footprint is reversed

Rev. C Errata

• SRV05 diode package had the Pin 1 indicator at Pin 6.
• Nunchuck footprint is reversed

Rev. D Errata

• SRV05 diode package had the Pin 1 indicator at Pin 6.