EOMA68 Computing Devices

by EOMA68

An Earth-friendly way to easily upgrade and fix your own computer

View all updates Aug 15, 2017

A20 2.7.5 HDMI Design Review, 3D Printing Underway

This update will be short: it’s been heavy going for the past couple of months: a lot of focus on very detailed work, for very long hours. Thank you very much to Richard for the extremely detailed and comprehensive help on the HDMI signal design. Pretty much every single message in the archives this month (about 50 messages so far) is about differential pairs. We’ll go ahead with the 2.7.5 pre-production prototypes when a full review and audit has been carried out… and not before.

The 3D printer design is an ongoing dual approach: sorting out the Taobao clone, and designing a new printer. Both are part of the strategy of targetting “maximisation of millimetres per second per dollar” in order to be ready for the massive batch of 3D printing for the laptop. Both printers will be made available when they’re reasonably ready on a planned crowdfunding campaign, for which there are at least three people committed to buying them in order to help out: one of whom is a friend who is brave enough to trust me to get one already.

And about that: when I ordered the kit on Taobao (the equivalent of eBay) it arrived fine, no styrofoam protection whatsoever, bits clunking around inside the box, no damage done. When my friend ordered the exact same kit a whopping fifteen part types out of the sixty listed on the attached BOM were completely missing. No drive gear, no bearings, no microswitches - nothing. If he had been in Europe that would be a three-week shipping delay and he probably wouldn’t have gotten any response. It just illustrates precisely why it’s necessary to source components yourself from China, and actually have someone that can be trusted to verify them.

Anyway here is the discussion about the Riki200 - the first design concept was a bust. In order to get up and running, I’m trying out the “Etch-a-Sketch” concept, and, once that’s working and I can print out PETG and PolyCarbonate (PC) successfully in order to get reliable parts, I will redesign it to the Ultimaker-2 style belt layout: drive rods and twin belts per axis. Photos, videos and so on are being posted on the reprap forum.

$235,135 raised

of $150,000 goal

156% Funded! Order Below

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Libre Tea Computer Card

An EOMA68-compatible computer card with an Allwinner A20 dual core processor, 2 GB of RAM, and 8 GB of NAND flash pre-installed with the Parabola GNU/Linux-libre operating system. We expect the Libre Tea Computer Card to receive the Free Software Foundation's Respects Your Freedom (RYF) certification before the first units ship.


Practically Perfect Computer Card

An EOMA68-compatible computer card with an Allwinner A20 dual core processor, 2 GB of RAM, and 8 GB of NAND flash pre-installed with the Debian GNU/Linux operating system.


Numero Uno Computer Card

An EOMA68-compatible computer card with an Allwinner A20 dual core processor, 2 GB of RAM, and 8 GB of NAND flash pre-installed with the Devuan GNU/Linux operating system.


Getting Ahead Computer Card

An EOMA68-compatible computer card with an Allwinner A20 dual core processor, 2 GB of RAM, and 8 GB of NAND flash pre-installed with the Fedora 24 GNU/Linux operating system.


Micro Desktop Housing for Computer Card

This is a Micro Desktop base unit and power supply unit with a beautiful laser-cut stack of 3mm plywood panels that creates an aesthetically attractive tiny base unit for your Computer Cards. Excludes Computer Card, keyboard, mouse and VGA monitor.


PIY Laptop Housing Kit for Computer Card

This Print-It-Yourself (PIY) kit includes all the parts, cabling and boards (main, power, and controller, assembled and tested), and battery, charger, keyboard, LCD, and CTP-LCD for trackpad that are needed to build a complete Libre Laptop once you 3D print the enclosure from the freely available GPLv3+ licensed plans. Excludes Computer Card.


PFY Laptop Housing Kit for Computer Card

This Printed-For-You (PFY) kit has everything needed to create a full EOMA68 Laptop, including a 3D printed set of casework parts, bamboo plywood panels, tested and assembled PCBs, cables, battery, charger, keyboard, LCD, and CTP-LCD for trackpad. Available in a variety of colors and materials. Excludes Computer Card.


Completely Assembled Laptop + Computer Card

A meticulously hand-assembled and fully-tested laptop. Includes your choice of EOMA68-A20 Computer Card and 3D-printed casework.


On-site Consultation, Presentation, and Workshop + Laptop + Computer Card

For those people who would like the opportunity to meet the designers and have them personally go over the project's development, history, future direction and much more, a week's time can be made available to meet with you personally, to do a hands-on workshop to help you (and any number of additional attendees) through the process of putting together your own fully-functioning laptop and even take you through the process of building and installing the software. Also included will be one Laptop with a Computer Card which will be assembled on-site. You must provide travel, accommodation, tools and a suitable workshop and presentation space. Contact us directly for details.


PCMCIA/EOMA68 Breakout Board

One PCMCIA/EOMA68 Breakout Board with one surface mount PCMCIA header, and tracks to some convenient 2.54-mm-spaced through-holes. Added by popular demand, for access, tinkering, development work, testing, etc.


Pass-through Card

A simple card that takes in HDMI and USB and passes them on. Turns a Laptop Housing into a portable, battery-powered dock for your smartphone, USB-HDMI dongle computer, and tablet, or a second screen, keyboard, and mouse for your existing laptop or desktop PC.


USB + HDMI Cable Set for Standalone Operation

Includes a Micro HDMI Type D cable and 3-way USB-OTG Host-Charger cable tested and known to work with EOMA68 Computer Cards. These are the cables you need to run a Computer Card as a standalone device without the need for a housing. Also useful with the Micro Desktop or Laptop Housing to add a second screen and extra USB port.



Luke Kenneth Casson Leighton


Christopher Waid


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