Regular Expressions in Java

Introduction

You might remember that one article I wrote about Lambda expressions in Java last year. In that article I took a quick look at what Lambda expressions are and how you can use them in Java. This article was quite popular and I thought it’s about time that I write something about regular expressions here on nerdhut. However I only wanted to give you an introduction about regular expressions and how you can use them in your Java code to detect patterns in a text or to search for something. Continue reading Regular Expressions in Java

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Homemade DIY word clock – Low cost variant

In this article I want to cover an alternative I’ve come across while building the “real” word clock project. This version will not feature a 12×12 LED-Matrix display. Instead it’s made with LED strips and only the significant words on the clock can light up. With this method you can’t display custom messages, but the whole build won’t cost you as much either. Read all about this build in this article or watch this video:

Continue reading Homemade DIY word clock – Low cost variant

Quick build: DIY bench power supply from an old computer’s PSU

I have taken apart several old computers this weekend and so I had several old PSU laying around afterwards. I opened one up that was known to be faulty, that’s why I got the computer for free. So I took a quick look inside and several caps were leaking. I decided not to throw it away, instead I repaired the PSU and gave the internals a new life. I actually had this idea years ago but I didn’t have a spare PSU I could take apart. Here is a rough guide on how to build your own power supply for almost no cost at all! Continue reading Quick build: DIY bench power supply from an old computer’s PSU

Mac Apps with Xamarin – Hello World Tutorial

Some time ago I wrote an article about how to get started with Windows 10 App development. This article will introduce you to Mac-Apps and will guide you through the process of programming one with Xamarin and C#.

Easy to follow video included at the end of the article.

Continue reading Mac Apps with Xamarin – Hello World Tutorial

Homemade DIY word clock – Part 3.1

Introduction

Obsolete information! Please view this article for a complete and easier guide!

This is the last revision I’m going to post before I completely finish the post. It has all the features I wanted and defined in the first part, and it’s as easy to manufacture and to build as possible. So this is just a really short and quick update with the newest files for editing and printing. Continue reading Homemade DIY word clock – Part 3.1

Homemade DIY word clock – Part 3

Introduction

Obsolete information! Please view this article for a complete and easier guide!

In this part I’ll discuss the code, needed to set and read the current time from the RTC and to control the individual LEDs on the LED matrix:

Continue reading Homemade DIY word clock – Part 3