John demonstrates the Odroid U3

13 04 2014

John demonstrates the Odroid U3

March 2014′s meeting at the Cock Hotel, John Alexander demonstrated an Odroid mini pc with a small enough format to bolt to the back of a standard fitting of a TV and drive it via HDMI. He worked through its facilities and capabilities, booting it’s OS very quickly and nicely included multimedia TV application that all promises to just work unlike the click and wait (and hope) by another similar device. Incedentaly – contact John if you are interested in these.

Odroid U3 power measurements

6 04 2014

I have a good few Odroid U3  SBCs I’m currently evaluating.

During this process I have been taking current measurements from

my bench supply whilst getting the U3 to perform various painful tasks such as 1080p

video playback and CPUBURN on 1,2,3 & all for all  4x 1.7GHZ cores.

Less demanding but more realistic I went through some web browsing, word processing

and Graphics “editing” with GIMP

Approximate results.

Idle 0.2-0.3A

Booting 0.3-0.9peak

Normal tasks 0.4-0.5A

CPU BURN 4cores 1.4A

1080p Movie playback 0.8-1.0A

PIFace Control & Display Tear Down

30 12 2013

Currently involved  with the rather fun PiNoir & Santa Catcher Challenge one

of the main Components for the Challenge Kit is the PIFace Control & Display


We wanted to know what’s inside and what’s connected to what but unfortunately

the 16×2 LCD is soldered to the main PCB. Fortunately I have a good de-solder tool to hand

and a few minutes latter we had this.



First thing you see is the 16 bit SPI port expander from Microchip MCP23S17




From a set of very close photos I’m taking an educated guess the IR Receiver (SV2)  is a Vishay TSOP 34438.

Take a look at the data sheet and the drawing below to get an idea of how it’s connected..


I’ve done a check over with the multimeter and checked the continuity and values where appropriate and I feel they are

more or less right .. please contact us with any comments or corrections ..cheers


Here’s the Johnny CAD drawing and yes I know I can’t draw !!

PiFace Control and Display.png

Derby Makerfaire 2013

2 12 2013

Had a great time at the Derby Makerfaire last weekend and as usual took a load of video of the various exhibits and traders

hope you like the general theme. If you are from the area or can get down to the next one it will definitely be worth a visit.

Here are the vids

A somewhat collection of Robot Organ  and Astronaut Caravan

The Shropshire Linux User Group’s 3d Printing and Flashy light stand

Jim Spence of ByVac giving a great overview of the company’s new Raspberry Pi product line

Awesome one wheeled self balancing Skateboard

Project Laika and Kitronics exhibiting their robot control board for the PI

Richard Haber’s collection of POV LED Clocks

Blink Stick show their post Kickstarter Flashy light and Hexapod


November Meeting on Thursday 28 th at Cock Hotel Wellington

22 11 2013

SLUG-meetingContinuing on from our successful October meeting Lee Cashmore will be carrying on his presentation on Linux server technology and key applications.

Please shout up on the List or in comments below if you have some key aspects discussed or better still demonstrated at the meeting.

October Meeting on Thursday 31st at Cock Hotel Wellington

14 10 2013


Lee Cashmore  will be doing a presentation where he will be talking about the installation of Server Grade operating system(s) and how to install and configure Key server applications.

The talk will be based on Centos as this is closest to commercial Linux releases .

Please shout up on the List or in comments below if you have some key aspects discussed or better still demonstrated at the meeting.

Cambridge Raspberry Jam Sept ’13

29 09 2013

Managed to get a ticket to last weeks Cambridge Raspberry Jam which seems to be held semi regular every 3 months!!

This particular Jam is particularly well supported and tickets always sell out fast.

This is not that supprising as you get a large selection of both Vendors, Guest speakers and occasional guest stars form the

RPI Foundation!!

This time it was held a the Cambridge Insitute of Astromomy with loads of space related info and art work decorating the walls

and even a few real scientists still busily running in and out of their offices(Enthusiastic for a Saturday!!)

Other than the exhibitors there was 5 or so talks and a similar number of Lightening talks where vendors could tell us what they were doing

and why of course. Out side the main hall they also had a set of talks held in a more informat class room setting.

Here’s a taster of the event in video:

RasPiTV Alex Eames talks about his teaching and Raspberry Pi experiences

Cyntech talk about their cases and other products :

A rather fun talk about  a Raspberry PI robot using a Big Track and Robot arm

Rob’ van den Linden of Ciseco  gives an excellent talk on their Radio products and the new RasWIK kit

The talk was so good I spent £97 on a RasWIK kit and several other Items.

I even goaded a friend of mine David to a similar £97 bill

Expect a series of vids based on their kit and pre worked projects in the near future.

Finaly a hi to John Evans and David Walker friends of mine from the Sinclair QL days,

both technologists and professional hecklers !!


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