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Build a 10-Channel Constant Current Source for LED Selection
January 14, 2020 by Clemens Valens

Build a 10-Channel Constant Current Source for LED Selection

When using one or two LEDs as indicators in a circuit, their respective brightness is not the most important thing in the world. If, on the other hand, the goal is to build a LED-based lighting system for homogeneously illuminating for instance a painting or another surface, then the individual brightness of each LED is important. After building this tool, handpicking LEDs for brightness becomes much easier.
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Introducing the GreatFET One Dual-Core Microcontroller Board for Python
January 9, 2020 by Clemens Valens

Introducing the GreatFET One Dual-Core Microcontroller Board for Python

The GreatFET One board created by Great Scott Gadgets is designed around an LPC4330 dual-core microcontroller from NXP. The board comes preloaded with a special firmware that allows it to be controlled easily from a host computer thanks to an extensive Python library.
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Add a Multi-Colour Backlight to Your 6-digit Nixie Clock
January 7, 2020 by Clemens Valens

Add a Multi-Colour Backlight to Your 6-digit Nixie Clock

The Six Digit Nixie Clock we published in Mai 2016 was greeted with a lot of enthusiasm. One of its users, F1Andy, posted a design for an upgrade to add WS2812-based multi-colour backlighting to the clock. He reworked the software too. Now it has alarm functions and it can display the date. To extend the life of the Nixie tubes dimming and anti-cathode poisoning was added as well. Note that some of these new functions require minor hardware modifications of the clock. An official Elektor PCB for the multi-colour backlight will be available soon.
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Georg Simon Ohm Preferred Playing Billiards - a Short Biography
January 6, 2020 by Clemens Valens

Georg Simon Ohm Preferred Playing Billiards - a Short Biography

Volta, Ampère, Ohm — we use their names all the time, but what do we really know about the people who laid the foundations of modern electronics? In this article we will (briefly) explore the life of Georg Simon Ohm.
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How To: Use a Triac in LTspice
January 1, 2020 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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