MORE ABOUT Arduino

To make accurate voltages measurements you need an A/D converter (ADC) chip which has good resolution. The folks at Elektor Labs have developed a board containing a four-channel 16-bit ADC. It’s no coincidence the board uses a Gnublin/EEC connector which makes it compatible with the Elektor’s Linux board, Xmega Webserver and the new Extension shield for Arduino. A universal C library is included to make integration a walk in the park.

Do you intend to work on a Raspberry Pi project with a camera? Then this book will get you going for sure. In this book about camera projects, Dogan Ibrahim shows you how you can do this step-by-step . From a simple photo with a selfie stick, or the construction of a wildlife camera, right up to the complex process of licence plate recognition.

The word LiDAR, the ‘Li’ meaning ‘light’ indicates a device for optoelectronic echolocation. Instead of radio frequencies, the Lidar transmits a pulsed laser beam, the echo of which allows the determination of the distance of a reflecting obstacle. There is much talk these days of self-driving cars. Cheap Lidars with interesting characteristics are now available to anyone; they permit rapid development beyond the experimental stage.

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Sometimes a project is given such a name that you (read: me!) do not immediately know what it represents or what it does, an ‘Earth Listener’ for example. The description of the product, however, makes things much clearer: ‘The Earth Listener from Velleman is an Arduino-based sensor module that can measure multiple environmental variables in order to indicate the air quality’.

This is a submission from Distrelec about the next instalment of their webinar series. They have announced its collaboration with leading manufacturer of open-source technology, Arduino. The webinar 'rapid IoT system design with Arduino' will take place on Thursday 23rd May.

This circular wall clock comes as a partially assembled kit. It is presented in the form of a simple ring of about 25 cm (10 inches) diameter, to hang on the wall. In fact, all you see is this sober black crown a few centimetres in size, which acts as the dial. No display, no hands, no second hand, no pendulum, nothing like that. And yet, like all good timepieces, this one does have hands, a second hand, and even a pendulum.

Author Burkhard Kainka’s inspiring Foreword in the book I’m reviewing here has important clues as to why software defined radio (SDR) is a hit not only among existing radio amateurs. SDR has proven to be a great promotion tool for the declining radio hobby in general. Since the tuning and decoding of shortwave radio signals is now done with a minimum of hardware and powerful (free) software, it’s easy to see why newcomers to the radio hobby and others with “DC minds” or with “deep fears of RF” have been totally captured by the concept of SDR.

Answers to (too) often-asked questions about Arduino.

Occasionally it may be useful to visualize a continuous stream of data arriving through a serial connection as a web page in a browser. But how do you go about? May we suggest a bit of scripting?