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 – Build your own UPS (Uninterruptible Power Supply)
Hardware & GPIO, Projects
Hardware & GPIO, Projects

Raspberry Pi – Build your own UPS (Uninterruptible Power Supply)

Felix - 2. September 2018

In some applications, it is important that the Pi continues to be powered in the event of a power outage. If something is written on the SD card at the moment of power interruption, it is possible that the image will become corrupt and thus unusable. A UPS (Uninterruptible Power Supply) ensures that if a […]

How to use Photoresistors (Brightness / Light Sensor) with a Raspberry Pi
Hardware & GPIO
Hardware & GPIO

How to use Photoresistors (Brightness / Light Sensor) with a Raspberry Pi

Felix - 16. July 2018

To use, for example, a weather station, it is important to know the brightness. With a Raspberry Pi light sensor (photoresistor/brightness sensor), it is very easy to determine a value, which can say, for example, if it is day, twilight or night. In turn, projects could be implemented to control the (exterior) lights, which turn […]

Measuring Soil Moisture with the Raspberry Pi
Hardware & GPIO
Hardware & GPIO

Measuring Soil Moisture with the Raspberry Pi

Felix - 24. June 2018

There are some sensors for the Raspberry Pi that can measure humidity, temperature and other values. Nevertheless, these modules are almost exclusively suitable for the air and not intended for use in the earth. For some projects, such as an automatic plant supply, the moisture of the soil must be measured, then, e.g. refilled with […]

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 […]

Infrared Distance Measurement with the Raspberry Pi (Sharp GP2Y0A02YK0F)
Hardware & GPIO, Projects
Hardware & GPIO, Projects

Infrared Distance Measurement with the Raspberry Pi (Sharp GP2Y0A02YK0F)

Felix - 17. June 2018

There are some infrared distance sensors from the manufacturer Sharp, which can be operated very simply with the Raspberry Pi. There are different distance meters, which cover different distance ranges. These modules work similarly to laser distance meters, but with infrared light. There, bundled light is emitted by a transmitter and an analogue voltage is […]

Control Raspberry Pi Wireless Sockets (433MHz) – Tutorial
Hardware & GPIO, Home Automation
Hardware & GPIO, Home Automation

Control Raspberry Pi Wireless Sockets (433MHz) – Tutorial

Felix - 16. April 2018

Often you want to be able to control (household) devices with a higher voltage with the Pi. Raspberry Pi wireless-controlled sockets are ideal for this because they are very easy to control and you do not have to interfere with the circuit. For that and many other projects, there are wireless sockets, as they can […]

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 […]

Build Raspberry Pi GPS location/navigation device
Hardware & GPIO
Hardware & GPIO

Build Raspberry Pi GPS location/navigation device

Felix - 13. April 2018

While every smartphone has GPS, the Pi can also be converted into a GPS receiver with a cheap Raspberry Pi GPS module. In many outdoor applications, especially those that move (Car-PC, weather balloon, etc.), the exact position is a big advantage. Mobility is achieved with a battery pack or a USB power bank. In this […]

Connect and control Raspberry Pi motion detector PIR
First Steps, Hardware & GPIO
First Steps, Hardware & GPIO

Connect and control Raspberry Pi motion detector PIR

Felix - 9. April 2018

Due to its design, the PIR motion sensor module is very easy to use because it already has the components installed. Raspberry Pi motion detectors in home automation and/or outdoor applications (as a classic outdoor motion detector) are easier than ever to implement. I will show the commissioning in this tutorial.

Remote Control a Raspberry Pi with 433Mhz Radio Transmitter
Hardware & GPIO, Home Automation
Hardware & GPIO, Home Automation

Remote Control a Raspberry Pi with 433Mhz Radio Transmitter

Felix - 6. April 2018

Whoever is aiming for home automation will sooner or later certainly think about the wireless operation. The 433Mhz frequency is ideal for this because there are many cheap transmitters and receivers as well as a wide range of available libraries and scripts. In this tutorial, I want to show how to use a small handheld […]

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