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December 14, 2019 by Clemens Valens

Trying out the PeakTech 3450 True RMS Multimeter & Thermal Imager

In this video we try out the PeakTech 3450 True RMS Multimeter & Thermal Imager. Of course, the main attraction of this versatile instrument is the built-in thermal camera. We found that this multimeter even allowed us to test the endurance of our cat!
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How To: Use a Triac in LTspice
December 13, 2019 by Clemens Valens

How To: Use a Triac in LTspice

LTspice is a great and free circuit simulator that allows you to do a lot of things. However, simulating a TRIAC or DIAC circuit can be a challenge as these parts do not work straight out of the box. This video shows you how to get the job done. It also gives some background information on TRIACs and how to experiment with them in LTspice.
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STEMTera, a Proper Way to Do Arduino
December 12, 2019 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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pi-top 4 - Unboxing and First Impressions
December 11, 2019 by Clemens Valens

pi-top 4 - Unboxing and First Impressions

The pi-top [4] is a robust educational computer intended for makers, and especially young makers better known as children. Based on a Raspberry Pi 4, it is a follow-up to the pi-top [3] Raspberry Pi laptop computer.
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Raspberry Pi Bash Command Cheat Sheet
December 10, 2019 by Clemens Valens

Raspberry Pi Bash Command Cheat Sheet

Because it is almost impossible to work on the Raspberry Pi, or, for that matter, on Linux in general, without ever needing to enter commands in a terminal, here is a list of frequently used Bash commands.
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Build an Electronic Load for DC and AC
December 3, 2019 by Clemens Valens

Build an Electronic Load for DC and AC

Even though an electronic load is not a tool many people will use daily, it is very practical to have one in your lab just in case. Testing a power supply is probably the first thing that comes to mind, but what about that AC heater regulator that isn’t functioning too well? This electronic load can test it as it is suitable for DC as well as AC.
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Environmental Monitoring System with ESP32
November 26, 2019 by Clemens Valens

Environmental Monitoring System with ESP32

Many people care about the environment they live in. It's not about the speed of your Internet connection or other mundane problems, but about particulate matter and radioactive elements floating in the air. This Environmental Monitoring System allows you to keep an eye on what is going on around you.
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Trying Out the ESP32 Smart Kit Bundle with Arduino and MicroPython
November 26, 2019 by Clemens Valens

Trying Out the ESP32 Smart Kit Bundle with Arduino and MicroPython

In this video we review the Elektor ESP32 Smart Kit Bundle consisting of the Elektor book "The Complete ESP32 Projects Guide" and the "ESP32 Smart Kit" component box. We learn how to set up the Arduino IDE for the ESP32-DevKitC, and try a few examples with it. In the end we switch to MicroPython and make an LED flash.
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Review: Bench-top Power Supply PeakTech PSU 6225A
November 14, 2019 by Clemens Valens

Review: Bench-top Power Supply PeakTech PSU 6225A

The sudden death of my faithful lab power supply offered a good opportunity to try out the affordable PeakTech PSU 6225 A which has similar current specifications as my deceased PSU (5 A vs. 6 A). The small form factor of this PSU was also a point in its favour.
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Build an Arduino-based Thermometer Cricket
November 13, 2019 by ElektorLabs

Build an Arduino-based Thermometer Cricket

There are many temperature-related effects that can be used to measure temperature. The chirping sound produced by a cricket is one of them. Here is a simple Arduino-based circuit that let's you emulate a thermometer cricket.
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