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).

7 Segment Display (Anode) with MAX7219 / MAX7221 and Raspberry Pi
Hardware & GPIO
Hardware & GPIO

7 Segment Display (Anode) with MAX7219 / MAX7221 and Raspberry Pi

Felix - 20. March 2018

The most common form of 7-segment displays are “Common Cathode”, for which et al. the microchips MAX7219 and MAX7221 are intended. There are also “Common Anode”, which are usually a lot cheaper. However, these are not directly compatible with such a microchip. How it all works is shown in this tutorial. Anyone who wants to […]

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 […]

Raspberry Pi and I2C Air Pressure Sensor BMP180
Hardware & GPIO
Hardware & GPIO

Raspberry Pi and I2C Air Pressure Sensor BMP180

Felix - 15. February 2018

For weather stations and similar projects, it is often important to determine the air pressure. How to determine the temperature and humidity with sensors has already been shown in previous tutorials. With the help of the barometer BMP180 the air pressure (in hPa / bar) can be determined via the I²C bus of the Raspberry […]

Raspberry Pi: Measure Humidity and Temperature with DHT11/DHT22
Hardware & GPIO
Hardware & GPIO

Raspberry Pi: Measure Humidity and Temperature with DHT11/DHT22

Felix - 3. February 2018

With the Raspberry Pi and some sensors, it is easy to measure the temperature without much effort. In addition, however, the humidity in certain situations or projects (such as a weather station) can be enlightening. Sensors such as the DHT11 and DHT22 are not only available for a few euros, but they can also measure […]

Connect and Control WS2812 RGB LED Strips via Raspberry Pi
Hardware & GPIO, Projects
Hardware & GPIO, Projects

Connect and Control WS2812 RGB LED Strips via Raspberry Pi

Felix - 15. November 2017

If you are looking for RGB LED strips, you will probably come across the WS2812 or the WS2801. These two LED strips are very different, but both can be controlled with the Raspberry Pi. After using the latter in a previous tutorial and using it in our Ambilight, this tutorial is about using the Raspberry […]

Measuring Temperature with a Raspberry Pi Temperature Sensor (1-Wire)
Hardware & GPIO
Hardware & GPIO

Measuring Temperature with a Raspberry Pi Temperature Sensor (1-Wire)

Felix - 7. November 2017

One of the many applications of a Raspberry Pi is measuring the temperature. In projects like weather stations you want to know the exact value. Using a 1-Wire Raspberry Pi temperature sensor makes it very easy to read it out and you will only need one GPIO pin. In this tutorial it is described how […]

Build a digital Raspberry Pi Scale (with Weight Sensor HX711)
Hardware & GPIO, Projects
Hardware & GPIO, Projects

Build a digital Raspberry Pi Scale (with Weight Sensor HX711)

Felix - 21. May 2017

As hardly any scales work analogously, it is of course also possible to measure weights with a digital Raspberry Pi scale. This can be used in various applications as the weight value ranges which can be measured are also almost unlimited. Only a sensor and a load cell are required, which are available for different […]

Control a HD44780 LCD display via I2C with the Raspberry Pi
Hardware & GPIO, Projects
Hardware & GPIO, Projects

Control a HD44780 LCD display via I2C with the Raspberry Pi

Felix - 15. May 2017

LCD character displays are a simple and a cost-effective way to display a text. Thanks to the HD44780 controller, the control of the modules has become very simple. However, one must occupy many GPIOs for it. An alternative is the I2C data bus, which means that only two GPIOs are used. In this tutorial a […]

How to connect and control a Raspberry Pi WS2801 RGB LED Strip
Hardware & GPIO, Projects
Hardware & GPIO, Projects

How to connect and control a Raspberry Pi WS2801 RGB LED Strip

Felix - 7. April 2017

One of the many Raspberry Pi projects is the lighting of rooms or objects. LED strips are particularly suitable for this purpose, because many individual LEDs are aligned and each individual LED can display all RGB colors. Thus, some projects such as room lighting, Ambilight or e.g. a Christmas tree lighting can be realized. The […]

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