Igor De Souza

Table of Contents The Triforce of Performance Improvements in Java 25From 8-Bit to Open World – A Parallel Journey Java Has Leveled Up (Evolved) Happy 40th Anniversary to The Legend of Zelda! 🎉🗡️ Today, February 21, 2026, marks exactly 40 …

Table of Contents The role of this GitHub repositoryWhy Java in Education MattersA Major Milestone: Java in CoderDojoCommunity Content vs. Official Raspberry Pi Foundation MaterialImpact on Raspberry Pi, Pi4J, and the Java EcosystemThe Challenge with the Raspberry Pi FoundationConnecting Existing …

Table of Contents YouTubePodcast AppsContent What if the future of Java depends on who we invite to learn it today? In this Foojay Podcast, we’re diving into something that affects all of us in the Java community: How can we …

Did you know? The Quarkus Clubd initiative started less than a year ago and is already one of the biggest groups in the world dedicated to Quarkus!

Let’s talk to volunteers from different organizations where coding is used to inspire children to become engineers.

Learn how to use Firmata4j to control an Arduino board from a Raspberry Pi board or directly from your computer.

Igor De Souza shares on his blog a lot fun and inspirational experiments with Java on Raspberry Pi. Some of those were already shared here on Foojay.io.

This time we want to highlight his work which combines a web app made with Spring and Thymeleaf, to control an LCD display connected to a Raspberry PI.

The Raspberry Pi allows us to do a lot of electronic projects without having to wait for ordered components… or even buy them at all… by using virtual components.

Today, I want to show a way to play with a potentiometer. A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider. If only two terminals are used, one end and the wiper, it acts as a variable resistor or rheostat.

In this article we present you with another great example of Java on Raspberry Pi. It shows how to create a Micronaut Velocity demo using an 8×8 LED matrix display.

Both on hardware as software level, you have different possible approaches, but the result is the same… a fun project to learn new software technologies and getting introduced into electronics.

The “Hello World” version of electronics programming is a blinking LED. But, in this post, we will go a few steps further and control 8 LEDs inside a number display.

Igor De Souza, Dublin based Principal Big Data Consultant at Oracle, set up an interesting experiment in which he combines a LED number display with the Raspberry Pi and Quarkus.