How to let an Arduino and Raspberry Pi communicate with each other
Arduino & ESP8266, Hardware & GPIO
Arduino & ESP8266, Hardware & GPIO

How to let an Arduino and Raspberry Pi communicate with each other

Felix - 8. June 2019

I have already described in a previous article how the Arduino works and which models exist. There are plenty of articles on the Arduino itself, but few in connection with the Raspberry Pi, but this combination offers many possibilities. Since I want to show more about the Arduino in conjunction with the Raspberry Pi, I […]

Raspberry Pi LCD Display: 16×2 Characters Display (HD44780)
Hardware & GPIO
Hardware & GPIO

Raspberry Pi LCD Display: 16×2 Characters Display (HD44780)

Felix - 21. April 2019

The most common controller of multi-line character displays is the HD44780. There are several Raspberry Pi LCD display sizes (8×2, 16×2, 20×4, etc.) that run with it. In this tutorial, I will show how to use a 16×2 character display and also run a test script.

Expand Raspberry Pi GPIOs with I2C Port Expander
Hardware & GPIO
Hardware & GPIO

Expand Raspberry Pi GPIOs with I2C Port Expander

Felix - 1. December 2018

If you have several smaller or one larger project, you will soon discover that the GPIO pins of the Raspberry are fastly becoming too little. For all of you, this tutorial will show you how to use an I2C Port Expander to easily multiply the GPIO pins many times over.

Raspberry Pi: Control Relay switch via GPIO
Hardware & GPIO
Hardware & GPIO

Raspberry Pi: Control Relay switch via GPIO

Felix - 17. June 2018

Often you want to control modules with a higher voltage with the Raspberry Pi. For this purpose, relays can be used on the Raspberry Pi: The relay “switch” is utilized by means of a low-voltage pulse. Since the Pi only tolerates a maximum of 5V (the GPIOs even only 3.3V) without relays, there is the […]

Raspberry Pi Servo Motor control
Hardware & GPIO
Hardware & GPIO

Raspberry Pi Servo Motor control

Felix - 16. April 2018

In addition to stepper motors, there are also small and cheap servo motors. The control of Raspberry Pi servo motors is very simple and thanks to the small size and weight they are used in many areas. Unlike stepper motors, servomotors can be controlled with a single GPIO. In this tutorial, I’ll show an example of […]

Use a Joystick on the Raspberry Pi (with MCP3008)
Hardware & GPIO, Projects
Hardware & GPIO, Projects

Use a Joystick on the Raspberry Pi (with MCP3008)

Felix - 26. March 2018

For some applications, such as games, a joystick can be useful or be even necessary. Since these usually work purely analogously, the signal has to be converted, which we do with the MCP3008 chip. Connecting and reading a joystick is shown in this tutorial.

Raspberry Pi Traffic Light Circuit with GPIO Part 2
Hardware & GPIO
Hardware & GPIO

Raspberry Pi Traffic Light Circuit with GPIO Part 2

Felix - 22. March 2018

It continues with the second part and the actual Traffic Light Circuit. Let’s take a look at the various Traffic Light Signals on Wikipedia. We want to recreate them at the push of a Button.

Raspberry Pi Traffic Light Circuit with GPIO Part 1
Hardware & GPIO
Hardware & GPIO

Raspberry Pi Traffic Light Circuit with GPIO Part 1

Felix - 22. March 2018

This tutorial is about a simple Traffic Light Circuit using the programmable GPIO Pins via Python. In the next tutorial, we will extend the circuit by a few functions (including an Input).

Build a Raspberry Pi infrared light barrier and measure speed
Hardware & GPIO
Hardware & GPIO

Build a Raspberry Pi infrared light barrier and measure speed

Felix - 19. March 2018

In this tutorial, I want to show you how to set up and use a small infrared light barrier, which gives a signal as soon as the light barrier is interrupted. By traversing both photocells one behind the other, the speed can be measured.

Fan control for better Overclocking of the Raspberry Pi
Hardware & GPIO
Hardware & GPIO

Fan control for better Overclocking of the Raspberry Pi

Felix - 6. March 2018

Who has his Raspberry Pi running as a Server, etc., will quickly realize that the little giant can become very hot. To a certain extent, one can surely ignore this, but if the Pi is running day and night, you should pay attention to the temperature (especially in a housing). Since I also had this […]

Wireless communication between Raspberry Pi’s via MQTT broker/client
Software, Webserver
Software, Webserver

Wireless communication between Raspberry Pi’s via MQTT broker/client

Felix - 18. January 2018

MQTT is a protocol that specifically sends data from devices of the Internet of Things and is supported by most microcontrollers and systems. To use Raspberry Pi MQTT communication, not much is needed, which is why this type of transmission is very interesting. In addition, it is really easy to use. In this tutorial, we […]