Posts 263
Reactive Spring Flux data from a Pi
Trisha Gee (Coder, blogger, speaker, Developer Advocate at JetBrains, @trisha_gee ), which I interviewed for “Chapter 4: Choosing an IDE”, and Josh Long (Spring …
Controlling a LED number display with JavaFX and Python on Raspberry Pi
In my book I explain the use of bits and bytes by using a shift register SN74HC595 IC and 5101AS LED number display .
Creating a timeline image with JavaFX
To create some timeline images for my book, I created this little JavaFX application to be able to easily update the content and recreate the image. Of course you can do the same …
Calculating resistor value with a JavaFX application
Using the Java library I created (see previous post ), it was a piece of cake to create a JavaFX UI on top of it!
Resistor color codes and calculations as a Java Maven library
Next step in my book progress, is getting more into the details of hardware components. And as always starting with the smallest most-used ones: resistors! To be able to fully …
Raspberry Pi history, versions, pins and headers as a Java Maven library
The best way to understand and learn something new, is to document it yourself. That’s what I’m doing in every step for my book-in-progress. And to fully get the …
Just a thought - Beware of the Partner Acceptance Factor
I first learned about the “WAF” at work during a lunch discussion between engineers, on self-made domotica projects. Apparently the major reason such a project fails or …
Controlling Arduino with Mosquitto and JavaFX on Raspberry Pi
One of the example applications in my book “Getting started with Java on the Raspberry Pi” combines a JavaFX application with Mosquitto on the Raspberry Pi to control a …
The mystery of the negative byte value in Java
A story of bits, bytes, signed and unsigned Some time ago there was a question on the Pi4J-forum caused by some confusion about a numeric value handled as a byte which was logged …
LED number display JavaFX library published on Maven
My very first open source JavaFX library is now available in the Maven repository! A small step for mankind, one giant leap for myself ;-)
DIY Arduino MIDI instrument
And another summer project got finished… ;-) My sons drum corps teacher triggered me to build an Arduino Midi controller so he could practice his rhythm skills.
Mission accomplished! The finished drum booth.
As a summer project requires, this project required a summer to get completed ;-) I still need to think about a big (double) door and how to make that one with or without glass. …
Selecting sound isolation
To work out my box-in-a-box I needed two types of materials: something “fluffy” for the walls, and something “strong” to carry the floor.
Making a DIY drum booth
What do you get if you combine a drum-playing son and a father who doesn’t like to spend thousands of euros? A DIY drum booth! ;-)
Quick start Java development with Visual Studio Code
Great move of Microsoft! They provide an all-in-one installer for Java dependencies and Visual Studio Code. Take a look at …
Clean Raspberry Pi GPIO testing with the Breadboard Pi Bridge
Some time ago I ordered a “Breadboard Pi Bridge - Pi Ports to Breadboard in Numerical Order” and reworked my Pi test setup from the previous blogs. And it looks really …
Pi4J to easily work with the hardware of a Raspberry Pi with Java
What is Pi4J See https://www.pi4j.com/1.2/index.html This project is intended to provide a friendly object-oriented I/O API and implementation libraries for Java Programmers to …
Pi4J - Adding a REST interface with Spring Boot
As I was learning Spring Boot myself, I thought the easiest way to learn was trying to build an example and write about it. So here we go… :-)
Pi4J - Extending with a JavaFX info application
While trying out what Pi4J can do, I found it could easily be extended with a JavaFX application to provide info about the headers on a Pi board. This could later be extended to a …
PiJava overview - Java 11 and JavaFX 11 on Raspberry PI
As my daily work mainly is Java and back-end stuff on “real servers”, I set myself for 2019 as a personal goal to experiment with Java 11 on a Raspberry PI.