Derek

About Derek

Dr. Derek Molloy is a senior lecturer in the School of Electronic Engineering, Faculty of Engineering and Computing, Dublin City University, Ireland. He lectures at undergraduate and postgraduate levels in object-oriented programming with embedded systems, digital and analog electronics, and 3D computer graphics. His research contributions are largely in the fields of computer and machine vision, 3D graphics, embedded systems, and e-Learning. This is his personal blog site.

Running Java Applications on the Beaglebone Black

Before you start:
First check if the distribution has changed to have a package installation of open java – Perform:

And see the output after you search for java

There are libraries and javascript tools, but no core java distribution. Unfortunately, this means a manual install!
Here are the steps for installing the JRE:
Step 1. Download the Embedded JRE to your desktop PC:  Go to […]

By |October 26th, 2013|Beaglebone, Blog, Uncategorized|26 Comments

Eclipse (Kepler) for C++ and Java Development

Just a quick video guide to setting up Eclipse for both C++ and Java development under Windows. This is useful for one of the modules that I teach at DCU in Object-oriented Programming. It uses MinGW and CDT to allow GNU c++ to work and the Java SDK for Java.

 

 

By |October 12th, 2013|Blog, Embedded Systems|3 Comments

Custom Video Streaming Player using LibVLC and Qt

Introduction
In my last two blog entries I have discussed how you can stream video from embedded Linux devices such as the Beaglebone using FFMPEG/AVCONV, the V4L2 Capture program and the Logitech C920 USB Camera (with hardware MPEG4/H264). In these setups I am using the regular VLC player to receive and display the video streams (RTP, UDP unicast and UDP multicast). […]

By |July 18th, 2013|Beaglebone, Blog|29 Comments

UDP Unicast and Multicast Streaming Video using the Beaglebone Black

Introduction
In a previous post, I described how you could set up the Beaglebone Black to capture video and process video using OpenCV with the Logitech C920 camera. In this post I am going to look at how you can begin streaming data using the camera and code that I had adapted previously. The previous post is here and the final instructional […]

By |July 12th, 2013|Beaglebone, Blog|32 Comments

Streaming Video using RTP on the Beaglebone Black

Introduction
In a previous post, I described how you could set up the Beaglebone Black to capture video and process video using OpenCV with the Logitech C920 camera. In this post I am going to look at how you can begin streaming data using the camera and code that I had adapted previously. The previous post is here and the final instructional page is […]

By |July 12th, 2013|Beaglebone, Blog|41 Comments

DIY LED Aquarium Lights Tutorial

In this post I give a short video tutorial on how I built the LED fish tank lights for my fish tank. I’m using high-performance Cree XP-G LEDs (XPGWHT-R5) on 23mm star PCBs. Each one outputs 556 lumen at 350mA. I use 6 in this video to give an output of 3,336 lumen at a cost of about 39 Watts […]

By |June 22nd, 2013|Blog, General|13 Comments

GPIOs on the Beaglebone Black using the Device Tree Overlays

This post provides supplementary information to the video that I have just posted on using GPIOs with the Beaglebone Black.
The Video
In this video I am going to continue my series on the Beaglebone by demonstrating how to use its GPIOs for both input and output applications. In this video I will wire simple input and output circuits that are attached to […]

By |June 12th, 2013|Beaglebone, Blog|102 Comments

Git and Curl SSL Certificates Configuration on Beaglebone Black

I have noticed that on the Beaglbone Black that I am constantly having problems with git and curl when it comes to https sites. This post addresses the configuration problems and shows you different ways to solve the problem that may suit your particular needs.
Fixing the SSL problems with Git
Out of the box, if you try to commit to a […]

By |June 5th, 2013|Beaglebone, Blog|21 Comments

Building git from source for the Beaglebone Black

I use github.com for all of my source code source version control. I noticed that in the past few days git push had stopped working for me on the Beaglebone Black (BBB) for one of my repositories. I decided to build git from source to see if it was a version issue. The version of git on the BBB is version 1.7.7 […]

By |June 4th, 2013|Beaglebone, Blog|4 Comments

Setting a Network Proxy on the Beaglebone Black

I have just posted on how to configure your network to use a static IP address at this post: Set the IP address statically on the Beaglebone Black. One issue that is related is the case where you now wish to use a proxy with your device. This is common within universities and other organisations and the limits on what […]

By |May 28th, 2013|Beaglebone, Blog|4 Comments