Instructables
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The DE4 Tablet is a portable tablet computer designed by the Computer Laboratory at the University of Cambridge.

It uses a Terasic DE4 FPGA board with an Altera Stratix IV FPGA.  It has a full set of peripherals on the DE4, as well as a battery, touchscreen and HDMI output - you can give presentations from your own FPGA design!  As well as designing the tablet we designed the CPU and most of the peripherals that go on the FPGA.

This is the mechanical design - what you put on the FPGA is up to you! We hope to open source more of the components we use in our FPGA designs in future.

To build the Tablet you will need:

A DE4 FPGA board  http://de4.terasic.com.tw
Terasic Multi-touch LCD module  http://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=English&CategoryNo=68&No=653
HDMI Transmitter Daughter Card (optional) http://www.terasic.com.tw/cgi-bin/page/archive.pl?Language=English&CategoryNo=66&No=582
Energizer XP8000 battery http://www.energizerpowerpacks.com/uk/products/xp8000/ (optional, ours came from CPC) 
PicoPSU-80 voltage converter http://www.mini-itx.com/store/psu
Use of a laser cutter and some 1, 2, 3 and 4mm acrylic for laser cutting pieces 
A collection of M3 screws and pillars - see the full parts list in github

There are two versions - one with battery and HDMI output and the other
without.  These instructions assume you're building the battery version -
the non-battery version is simpler and you can just omit steps relating to
the HDMI and battery.


These instructions and design files are freely modifiable under the 2-clause BSD licence.
Computer Architecture Group, University of Cambridge Computer Laboratory
http://www.cl.cam.ac.uk/research/comparch/
 
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Step 1:

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First, grab a copy of the github project:
git clone https://github.com/ucam-comparch/de4tablet.git
or browse to https://github.com/ucam-comparch/de4tablet

You'll find some files beginning 1mm, 2mm, 3mm, 4mm - these are the designs
you need to laser cut.  We used several types of acrylic:
1mm clear (for the battery cover)
2mm clear (for the PCIe protector)
3mm blue (for the baseplate)
4mm clear (for top plate, bezel and supports)

If you don't have as many types of plastic lying around you can vary the
thicknesses and colours - you might have to adjust some of the support
pillar lengths to fit.
dhotrum19 months ago
Obviously this project is for rich experimenters. The board alone is $3000. Not for us normal folks. Sorry
ucam-comparch (author) 10 months ago
Rough costs are:
DE4 FPGA board US$3000
LCD $235
HDMI card $170
Battery £80
PicoPSU £20
Plastic and screws - not much

Probably it's possible to trim costs a bit by buying bits from eBay etc which we didn't try.
pne44310 months ago
how much does it end up costing for the parts?
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