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You Have Been MouseJacked!
April 1, 2020 by Clemens Valens

You Have Been MouseJacked!

Wireless mice, especially the older ones, can turn well-protected computers into vulnerable systems. Cheap and readily available tools like Arduino boards and nRF24 modules together with open-source software allow hackers to inject keystrokes through the little receiver dongle and take control of the computer.
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GitHub for Dummies Part 2: How to Publish on GitHub
March 18, 2020 by Clemens Valens

GitHub for Dummies Part 2: How to Publish on GitHub

Sharing your work with the world is easy thanks to platforms like GitHub and Elektor Labs. Where the latter specialises in electronics projects, the first is intended for software developers. There is no need to be intimidated by obscure git commands entered in terminals as GitHub also provides a nice and easy drag-and-drop interface.
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STEMTera, a Proper Way to Do Arduino
March 17, 2020 by Clemens Valens

STEMTera, a Proper Way to Do Arduino

When I was asked to review the STEMTera I had absolutely no idea what it was. The website, of the type that does not clearly mention what it is about, left me a bit puzzled, but when I opened the box, the product’s purpose became immediately clear and I loved the idea.
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Make a Voltage-Controlled Oscillator with Just One Opamp
March 12, 2020 by Clemens Valens

Make a Voltage-Controlled Oscillator with Just One Opamp

It is instructive, easy and even fun to play around with the free circuit simulator LTSpice every once in a while. In this video you will first learn how to analyse and understand a simple opamp-based square wave oscillator taken from an “old” datasheet before changing it into a voltage-controlled oscillator (VCO). Building the circuit on a breadboard shows that it really works. The simulations are of course available for downloading to get your own experiments up and running quickly.
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How-To Calculate the Prospective Short-Circuit Current or PSCC
March 12, 2020 by Clemens Valens

How-To Calculate the Prospective Short-Circuit Current or PSCC

The prospective short-circuit current (PSCC) is the maximum current that can flow through a shorted electrical circuit. The PSCC value is needed for selecting devices like circuit breakers and fuses to protect the circuit. So how does this work?
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