Building an IoT key safe box
“The measuring instrument is in the drawer of my colleague, but he is ill – we can’t reach it today” (drawer locked) or “Then I have to bring you the key to the second room in the holiday home tomorrow” are two sentences that initiated the project presented here. In our daily world, simple keys, […]
Application notes for the coating thickness gauge UT343D
1. Introduction The UT343D is a portable, highly accurate coating thickness gauge that can measure the thickness of coatings on both ferrous and non-ferrous metals. This instrument has high-precision and non-destructive measurement functions, as well as a single-point and multi-point averaging algorithm and a fast output of the measurement result for evaluation. It can therefore […]
Sensor database on the Raspberry Pi
Anyone who wants to record sensor data over a long period of time is inevitably faced with a problem: How can the collected data be stored and presented?InfluxDB and Grafana are actually tools designed for monitoring large servers, networks and websites. This tutorial explains how this combination can be used to visualize sensor data at […]
Desk, headset, VPN – what you need for the home office and digital conferences
The subject of home offices has been gaining in importance for several years. With growing global mobility, it is becoming more and more common for employees to work from home or their current location rather than from the office. However, there may be other reasons for preferring the home office. In Germany, around five percent […]
Low cost video surveillance with an IP camera surveillance system
The use of video surveillance with cameras in Germany is on the rise, as more and more homeowners and shopkeepers want to protect their belongings. Unfortunately, professional solutions are often very expensive and overloaded with extra functions that are usually not used at all. In the following we will present a monitoring system from MEGASAT […]
Remote controlled digital picture frame with the Raspberry Pi
Digital picture frames are among the most popular Raspberry Pi projects. In this How-To we show you how you can do this comfortably and without much programming effort with the free iOS and Android App of the Frankfurt startup FRAMEN. The project Suitable for: Beginners with basic knowledge Time required: approx. 1 hour plus individual […]
Converting Benchtop Oscilloscopes for Field Use
For many users, whether private or commercial, an oscilloscope is a high-priced but universal measuring instrument. As a rule, it is installed in the laboratory, in a repair workshop or at the personal workplace of the service technician and is therefore part of the workplace equipment (“benchtop”). The advantages offered by such a test device […]
Amazon Alexa on the Raspberry Pi
More and more people rely on language assistants like Alexa to perform simple everyday tasks such as setting timers, playing weather forecasts or switching lights on and off. But can you also use Amazon’s speech recognition without Alexa? Yes! With a Raspberry Pi, a microphone and some programming skills. Below you will learn how to […]
With Synology DiskStation to your own Cloud
The rise of data-hungry applications and the bad news of recurring cloud data leaks go hand in hand. Network storage (NAS) is the ideal solution for storing private data securely and locally. You can find out why here. In addition, information is then centrally available so that it can be accessed even when you are […]
How to install a VPN with the Fritz!Box 7590
If employees want to access their employer’s data and applications from their home office or on the road, this can lead to problems that affect security in particular. Using a Virtual Private Network (VPN) it is possible to establish a secure connection between home and company networks. This enables small offices or external users to […]
