HardLabs

MM1 Writer

JonathSpirit·MM1_Writer

MM1 Writer PCB layout, top view — open source board by JonathSpirit

About the MM1 Writer PCB

MM1 Writer is an open source PCB design by JonathSpirit, published on GitHub under the CERN-OHL-W-2.0 license. It is a 2-layer board measuring 101.5 × 55.5 mm, with 19 components from 10 distinct parts.

Other key parts include the C8051F385-GQ and 74AHC595. By type, the board carries 10 capacitors, 5 connectors and 4 ICs.

It belongs with the wearables designs in this gallery.

From the project

This is a board helper for programming memory that follow MM1 standard.

Copyright (C) 2021 Guillaume Guillet\ Licensed under CERN-OHL-W v2 or later

MM1 Writer, from the project README
From the project README

Main components on the MM1 Writer

C8051F385-GQ74AHC595

MM1 Writer bill of materials (BOM)

19 components, 10 distinct parts.

QtyPartRefs
1
C8051F385-GQ
U1
3
74AHC595
U2, U3, U4
1
USB_B
J1
1
JTAG (GTAG_adapter)
J2
1
MM1_receptacle_5530843-2
J3
1
MM1_addressExtension
J4
1
UART
J5
5
100nF
C1, C5, C8, C9, C10
3
10nF
C2, C3, C7
2
1uF
C4, C6

MM1 Writer design files

The KiCad project lives in the JonathSpirit/MM1_Writer repository on GitHub; these links point at the commit this page was built from.

MM1 Writer: common questions

How big is the MM1 Writer PCB?

The MM1 Writer measures 101.5 × 55.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the MM1 Writer?

19 components, from 10 distinct parts. The full bill of materials is listed on this page.

Where can I download the MM1 Writer design files?

From the JonathSpirit/MM1_Writer repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the MM1 Writer design in my own project?

Yes, under the terms of its CERN-OHL-W-2.0 license, which JonathSpirit chose for the repository.

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