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Ben

Ben

I may not agree with what you say, but I will defend to the death your right to say it - Voltaire.

Posted by on in En Vacances

The Brighton Centre is situated opposite the Brighton seafront, which makes it especially nice to go to during the summer, as one can hang out along the seafront before and after a show. Although as commented previously it gets quite chilly during the winter months and a walk along the seafront is not recommended.

It has a capacity of 4,500, which is probably its downside, as not all artists are comfortable performing in front of a maximum capacity audience of that size. 

We are lucky every now and again though, as some major artists do come down, like earlier in the year when we had Little Mix! Next year we will be spoilt for choice with the Kaiser Chiefs and Paloma Faith performing, amongst others. We ARE spoilt for choice! Anyway, this blog entry is a continuation of the last one about Diversity at the Brighton Centre.

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Tagged in: holiday Winter 2014
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Posted by on in En Vacances

Diversity are a British dance group that won a reality TV show, Britain's Got Talent,  six years ago. Ever since then they have gone on from strength to strength. We went to see them last night at the Brighton Centre, Brighton, East Sussex. It was a thoroughly enjoyable show even though it started more than an hour late, which meant that it did not end until after 11pm last night. Not good for the bambinos who had school the next day.

I captured a small part of the show with my Canon EOS M mirrorless digital camera fitted with a Canon EF-M 18-55mm f3.5-5.6 IS STM lens. The lens was fitted with both a UV(C) multi-coat filter and a circular polarizing filter, which I forgot to take off! This blog post is my happy take of the nights event, as it unfolded.

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Tagged in: holiday Winter 2014
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Posted by on in Computer Vision In Embedded Systems

 The Raspberry Pi camera module or more specifically the OV5647 image sensor consists of a CSI-2 image sensor interface. Quite fortunately, as the OV5647 can be found in many image sensing devices apart from the Raspberry Pi camera, like mobile phones for example, plenty of information can be garnished about this interface from the Internet. The CSI-2 is a standard interface or Camera Sensor Interface (CSI) defined by the Mobile Industry Processor Interface Alliance, usually referred to by their four letter acronym, MIPI.

This blog post is a brain dump of the continuation of the idea of interfacing the OV5647 image interface to FPGA boards and other embedded systems like the Parallella board containing a Xilinx Zynq FPGA and the Epiphany 16-core processor. We will also like to interface this sensor to Altera FPGAs like the SocKit, consisting of the Cyclone IV FPGA and Arrows family of BeMicro evaluation kits, which contain the Cyclone V FPGA. Support should also be provided for the Beagle Bone (black) and Intel's Galileo and possibly Edison development boards. 

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Posted by on in Development, Software and Tools

This blog post is about determining the value of the base resistor of a MMBT3904L, which is ON Semiconductor's variant of the general purpose 2N3904 NPN  Bipolar Junction Transistor (BJT), when used as a switch. The value is determined when the transistor is in the common emitter configuration. Sounds like a simple task and so it should be too. However, as we have commented many a time in our blog posts tasks that appear to be easy never are.  Hence, while undertaking this task we decided to follow Lao Tzu's (Who? - Ed) advice, which he elegantly formulated in the following quote: 

Do the difficult things while they are easy and do the great things while they are small. A journey of a thousand miles must begin with a single step - Lao Tzu.

So, as he has suggested the sensible approach in determining  the value of the resistance of the base resistor of a BJT is to perform the calculation a step at a time, as we demonstrate below.

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Posted by on in Robotics Using FPGAs

This blog post describes the analysis and component selection stage of the multi-channel servo controller board design and it is during this stage where, sadly, for most of us it all begins to go wrong.  It is during this process that every datasheet must be read and reread again and again, until every line of text and every curve in a graph is thoroughly understood. It is at this stage that some, out of despair of a looming deadline, decide to fall on their knees, look skywards and utter words of reverence, utter words of importance or just words.  

It is at this stage that others decide it  is time to put on their jeans and T-shirt and lock themselves in their study. Only to emerge  a few days later wearing a robe and sandals. As you will find out in this blog post we chose to put in a few night shifts to resolve the recurring problems in the design and felt justified emerging with our guru's attire. However, we have known some at this stage of the design process to decide that X marks the spot and continuously aim their heads at it, ceremoniously. Entertaining as this method could be, we prefer ours. However, we recommend you should choose the problem solving method that works for you!

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