In the recent installments, we used the MQTT protocol to exchange messages containing measurement values and commands between different clients. In this episode, we apply another protocol also based on TCP / IP, namely HTTP (Hypertext Transfer Protocol). The ESP32 generates web pages we can view in a browser...

For little cost it is possible to add the GT-521F52 fingerprint scanner to a microcontroller, an Arduino, a Raspberry Pi, a computer, or to anything else that can communicate over a standard asynchronous serial link. Adding such a module to a project would give it secure access and identifications capabilities and can help to prevent for instance pirates, children or cats from (mis)using your device. A review.

Often it is fine to use something without wondering why, what or how, but sometimes it is useful to understand why things are the way they are. This is especially true when it comes to PCB design and PCB manufacturing, an industry that is haunted by a mixed jargon from past and present. So, if to you “gerber” is just the name of a file format, then you may want to read on.

With 30 MHz bandwidth, 200 MSa/s sampling rate and its input range of +/-40 Vpp, IkaScope fits perfectly in your pocket and your hand. It transfers measured signals over high speed wifi connection to any Windows, Mac, or Linux desktop computers as well as tablets or smartphones (iOS & Android). It will remember your access points and connect to them instantly. No local network? No problems, IkaScope will create one on the go. And look at the price!

After some preliminary tests, the Anet A6 3D printer has been adopted by the Elektor Labs, notably for the flexibility it offers. Here is a first test print of a two-color object by changing filament, tried because this printer with a single extrusion nozzle is not primarily intended for this. A certain amount of experience and attention to detail is required for this operation, but it is made easy by a module of the excellent Cura software.

The differences in measurable potential on plants aroused the interest of Walter Polleros. His BioLight project detects electrical fluctuations which are then translated into a colour change of an RGB LED. This lightens the translucent pot in which the plant is located. Whether you are skeptical or enthusiastic, we are interested in your comments. Please restrain from calling names.

Not so long ago, for electronics enthusiasts wishing to replace their vintage jumbo magnifying glass, the search for an affordable microscope seemed frustrating because the offer was so small. This problem has fortunately disappeared. Prices have become more democratic and performance has improved. Now it is the choice of the microscope that has become difficult. Elektor's e-store alone offers three models. And in addition, one of them has an HDMI output to connect to an external display!

On the eve of my overseas business trip, I am debating with myself about what to pack, making sure that I have everything I need for over ten days of business meetings and private time with friends.

Elektor Business Magazine (EBM) Edition 5/2017 is now available for Elektor GREEN and GOLD Members and has a strong focus on IoT & Industry 4.0.  EBM offers innovators, electronics engineers and startup companies, essential information and insights into the latest products, research and intelligence from the industry.

It’s that time again – our September and October 2017 Elektor edition is now available for purchase! You can get your printed copy posted direct to your door for free, with no shipping costs at all, or the completely identical online version is available for instant download by GOLD and GREEN members here. This issue is packed full or things to keep you entertained, one of which is the Raspberry Pi Zero W. This article looks at the mini version of the Raspberry Pi — the Zero W — and how to not only get started with it but to make the most of all its capabilities. It also gives a practical project to put it all in to action and see what it can do. An exciting LabsProject featured in this edition is the GoNotify. This project looks at a flexible IoT sensor interface and how you can connect anything you like to the right sensor in the right place and keep an eye on it from a remote location. Definitely not a project to miss.

Elektor Business Magazine (EBM) offers innovators, electronics engineers and startup companies, essential information and insights into the latest products, research and intelligence from the industry. EBM Edition 4 / 2017 for August & September is now available and has a strong focus on LEDs, Drivers & Displays.