Currently viewing the category: "Coding"

Netduino Plus 2 (NETMF) and WS2812 RGB LEDs

By On 12. January 2014 · 7 Comments

Some weeks ago I got some Adafruit NeoPixel, a compact RGB LED module. Each LED module has a WS2812 chip that only needs three wires: power, ground and data. The data protocol is self-clocking, at a rate of 800KHz. The LED modules can be chained to build longer LED stripes. (For more details see the […]

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More Raspberry Pi Awesomeness: GPIO & Java

By On 17. March 2013 · Leave a Comment

I’ve been playing with the GPIO capabilities of the Raspberry Pi before using Python, which comes with easy GPIO access for the Raspberry Pi.

Java 8 for ARM

As I’m yet not very familiar with Python I got excited when Oracle accounced Java 8 for the ARM platform, so I downloaded the JDK […]

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New open source project: jspinfo

By On 5. October 2012 · Leave a Comment

Just some shameless self-promotion:

I recently uploaded my 3rd open-source project to SourceForge.net. It’s called jspinfo() and – for all of you who are familiar with PHP – it’s like phpinfo() but as a JSP file.

So, if you are a developer and you need some information about some common server settings, then […]

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Reading RFID tags with Arduino and ID12

By On 19. June 2012 · 5 Comments

The mission: getting started with RFID

With my recent gadget order I also bought an ID-12 RFID reader with a corresponding breakout board. The breakout board is needed because the ID12 chip contacts have a 2mm grid while the breadboards have a 2.54mm grid.

Step […]

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Numeric converter using different bases

By On 3. June 2012 · Leave a Comment

Inspired by a short conversation with jsilence I was looking for a NewBase60 converter written in Java and C#.

NewBase60 is a format suitable for building parts of URLs, e.g. for URL shorteners. Instead of just using numbers for the short links it uses letters as well, while internally still using […]

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C# Extension Methods, Part 3

By On 18. May 2012 · Leave a Comment

While I’ll probably (have to) focus on Java for the next month, I just came up with the idea of just another extension method class. It is acually not very helpful but it again shows how powerful extension methods can be.

This is how it can be used:

I know that this piece of code […]

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nHangman – a tiny game engine (prototype)

By On 5. April 2012 · Leave a Comment

Inspired by a question on StackOverflow (which was actually about using regex to replace strings used for a Hangman game) I hacked together a file in C# that contains a minimal implementation of the Hangman game.

The code is up on Github: https://github.com/jcoder/nHangman

It’s actually more of a protoype, but maybe it’s helpful to somebody.

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