by Ground Electronics

The datacentre-in-a-box for high-performance-computing and cloud software development, testing, and education

View all updates Jun 13, 2018

A Closer Look at What’s Included

The Circumference 100 packs a great deal into a surprisingly small space. And with the lack of cable clutter and its simple, smart design, it’s easy to forget what’s contained within. With this in mind we thought we’d take a closer look at precisely what is included with the C100, and also the C25.

Above you can see a photo of the parts that, when assembled together with an UDOO x86, Pi boards, and PSU, make up the Circumference 100. Starting bottom-left we have one of the doors, and above this, the 2020 aluminium extrusion and fittings that make up the chassis. Above this we have the dual-gigabit Ethernet adapter that gives the UDOO x86 3x gigE ports in total. To the right we have black stainless button head machine screws and then four 8-way custom backplanes.

Top-centre we can see the walnut veneer enclosure front with transparent grey Perspex window, and below this the custom front panel PCBA with 8x matrix displays and 32x individual LEDs. Beneath these are the laser cut Perspex panels. Moving across to the right we have 10x 5-port gigabit Ethernet switches and below these, the always-on fan plus guard, USB hub, cables and connectors.

Further right are the M2.5 black nylon hex spacers for the Raspberry Pi stacks and beneath these the 4x software-controlled fans. Lower down more guards, cabling and 50x short RJ45 cables.

The Circumference 25 parts can be seen above and are obviously quite a bit simpler, but once again it is surprising what it manages to pack into a reasonably small space!

Andrew and the Circumference Team

$8,535 raised

of $40,000 goal

21% Funded Time Expired
Jun 28 2018

Product Choices


Support Us!


Circumference 25 Enamel Badge

The same C25 metal and vitreous enamel badge as can be found on the front of the 8+1 node cluster, albeit with a pin fastener. Wear your Circumference support with pride!


Circumference 25

C25 8+1 node cluster campaign pricing.


Circumference 100

C100 32+1 node cluster campaign pricing. Includes custom logo etched on the wood veneer front panel.


Ground Electronics

Ground Electronics is a supplier of open source hardware kits and accessories, and is the manufacturing division of AB Open, an open source and technical communities consultancy that specialises in embedded and wireless systems. AB Open has many years experience working with semiconductor companies, component distributors and equipment vendors, developing technology demonstrators and consulting on all matters related to open source hardware and software.

Andrew Back

Dave Ives

Gareth Halfacree

Chelsea Back

Jerome Dineen

Rogue Robot

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