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Internet of Things

30 Posts authored by: shabaz Top Member
This is a teardown of a second-generation Amazon Echo Dot (purchased around January 2017, UK). The photos are fairly high-res and can be clicked to enlarge. There is a lot of intricate detail in the design.     The underside has a peeling part before the self-tap screws can be removed.   Almost the entire unit comes out, but there is still some stuff in the black plastic shell : ) Notice the two metal contacts for the speaker.   What the unit looks like outside of i ...
shabaz

Cisco Live 2017 in Berlin

Posted by shabaz Top Member Feb 24, 2017
The week-long Cisco Live finished today, and due to work I had extremely little time this year to check out the exhibits. I think I spent ten minutes before it closed : ( Anyway, here are the brief snippets that were possible to capture in ten minutes!   Firstly, a quad-Pi train : )   Every year the train demonstrations seem to get better. This years model looks very slick. End-on view. The small rectangular white and black thing inside near the front is some Bosch gadget: &# ...
Introduction Element14 decided to conduct a RoadTest of some of their most comprehensive Internet of Things (IoT) kits. The exercise in total included a dozen bits of hardware including the most popular single board computers (SBCs) various microcontroller boards and sensor boards. Wireless technologies included 3G mobile, 802.11 Wi-Fi and Bluetooth Smart (Bluetooth Low Energy). IoT platforms from three service providers were used. A free 4-week training course from IBM was examined. Multiple de ...
shabaz

Cisco Live 2016 in Berlin

Posted by shabaz Top Member Feb 20, 2016
The week-long Cisco Live event in Berlin finished today, and I had a chance to quickly check out a few (not all sadly due to lack of time) exhibits –. This is a very brief photo tour of perhaps 1% (at a guess more than 10k attendees, hundreds of firms present) along with short (typically 10-second) videos just to give an idea of the event.   The event took place very close to the city centre, so it was an excellent opportunity to also see some Berlin art.   Some vendors had ...
New Chips XMOS have released some fresh silicon - their banner provides a hint of part of the new functionality! It is probably the first microcontroller with GigEth capability : ) Performance is increased to up to 4000MIPS on a 32-core device. Also much more memory for programs and data : ) - up to 1M SRAM and 2M flash. There is also capability to perform some DSP-like operations, as well as the ability to load multiple bytes of data in a single clock cycle (like SIMD - single instruction ...
shabaz

Early Cancer Detection

Posted by shabaz Top Member Mar 19, 2015
A trailer here of an upcoming documentary about breast cancer detection and how perhaps new ways are needed to help detect it, and how a product that may help could be brought to market. I don't know much about it, but the product clearly uses small and lightweight sensors and wireless technology to ensure changing conditions are conveyed rapidly to experts. The documentary may be interesting to many, but also it may provide the Sudden Impact challengers with useful information too.   ...
Introduction Infineon's  DC Motor Control shield (see PDF product brief here) can be used to drive the most popular sort of motors (permanent magnet DC or PM DC motors, also known as Brushed DC motors or DC motors).  This post is an introduction to the board and shows how to use it. It can be used for small DC motors all the way up to large extremely powerful 250W motors. The actual devices on the board are intended for automotive or industrial applications such as pumps but the shield ...
shabaz

IoE Everywhere

Posted by shabaz Top Member Jan 29, 2015
This year's Cisco Live event in Milan, Italy was packed with Internet of Everything from various vendors. These are just some quick photos - apologies for the quality, they were from a mobile phone in the brief time I had:   Most important first: Lego city!   You can see the little round light sensors (light dependant resistors) installed in the road in the photo below. The street lamps are white LEDs: Lego parking spots and Lego parking violations can be monitored: A beautif ...
Introduction Project Morpheus is a battery simulator - primarily Lithium Polymer (LiPo) cells but other batteries are possible too. It will be possible to dial up a 3V coin cell profile for example or AA batteries as another example. Once the profile has been selected the battery simulator will behave like that battery, so for example in 3V coin cell mode it won’t drive a motor very well, but in 3V dual AA battery mode it can. It achieves this by dynamically modifying the output terminal v ...
For a recent project it was decided to try to use hot air to solder just a part to a PCB. This is a quick post just to document how it was attempted - it is not "best practice".   Although reflow soldering was not really mandatory for the particular PCB, it was decided to try to attempt it for the large TO-263 device that needed heat sinking. This is non-trivial due to the amount of metal that needs heating, and the holes which will enable capillary action to occur for flux and solder. Thi ...
Introduction This Battery Simulator project is intended to provide a way of testing small devices such as wireless sensor nodes that usually require a battery power source. For more details, check out part 1 by clicking here. After you've finished reading, click here for part 3.   This part 2 discusses some of the PCB layout (more details once the board has arrived and been tested!). Note: The board was not designed for production, and PCB layout engineers will take many different decisi ...
This is part one; click here for part 2. Reflow soldering of some of the components was covered in part 2.5. Part 3 covers some initial tests.   Introduction I purchased a product a while back which came with AA batteries that were rechargeable and afterwards I could see why; the product had terrible power consumption during power-off and the batteries discharged within a few weeks even if the product was not used. I contacted the manufacturer, and they claimed this was normal for their ...
Introduction There are plenty of features to explore in IoT; this post starts with the analog side. The ability to handle analog I/O is attractive for IoT wireless sensor node use to make use of many of the interesting sensors out there.   Often analog sensors need to be interfaced, however many sensors (such as thermocouples or photodiodes) output tiny voltages or currents. When designing IoT devices, it may be desirable to replace the sensor with a fixed voltage source or current sourc ...
shabaz

The Features of IoT

Posted by shabaz Top Member Nov 23, 2014
Introduction A recent topic of conversation discussed whether there was a need for IoT devices to have sensors or not. Points were raised that many features were important. For example the ‘smart objects’ view is a less sensor-centric view, where the smart object can have sensors attached. What then are the features of IoT in general? After studying dozens of IoT labelled solutions, there were many common features that appeared again and again. It was decided to try to document them, ...
Introduction The information that is gathered from sensors in its raw form or processed, can be priceless. Results may have taken days to obtain, so data loss can be catastrophic.   One general rule would be to get the data off small embedded devices as soon as possible, and back it up, perhaps store it in redundant data centres, and a cost-effective way of doing that is to make use of cloud offerings.   However, network connectivity is not always feasible for all use-cases. Furtherm ...

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