Raspberry Pi and SPI 8×8 LED matrix example with Java and Pi4j
While looking for a cheap and nice component to demonstrate the use of SPI (Serial Peripheral Interface) I found out this 8×8 matrix LED display
OpenWeatherMap forecast on LCD with Raspberry Pi, Java and Pi4J
Pi4J contains helper methods to minimize the work needed to use certain hardware modules on the Pi with Java. As an example, we will be
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.
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
Teach the Particle Photon to Text In 5 Minutes
Have an Internet of Things project idea that needs text capabilities? Let me show you have easy it is to teach your Particle Photon how
State machine with Arduino
Many systems can be described with state diagram. Therefore they can be implemented with so called State machine code with system delay. System delay can
Software PWM for controlling LEDs
LED’s brightness can be controlled with Pulse Width Modulation or PWM. Arduino only have so many PWM ports. Did you ever wonder how to control
Creating A Simple Relay Board Using Eagle
Here we just do a really simple relay board with two terminal blocks and an omron relay. Below you will see the schematic. I chose
LDR light sensor tutorial
Recently I received a question from a good friend of mine. He wanted to automate blinds on his office window and he wondered how he
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