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 […]

How to use a Raspberry Pi Fingerprint Sensor for Authentication
Hardware & GPIO
Hardware & GPIO

How to use a Raspberry Pi Fingerprint Sensor for Authentication

Felix - 25. March 2017

Not only in Hollywood films, fingerprint readers are seen more and more frequently. Such modules are often installed in home surveillance systems and are used for the simple but secure verification of persons. With such a Raspberry Pi Fingerprint Sensor you can also implement some other projects, such as secured locks. One of the advantages […]

Raspberry Pi Heartbeat / Pulse measuring
Hardware & GPIO, Projects
Hardware & GPIO, Projects

Raspberry Pi Heartbeat / Pulse measuring

Felix - 23. March 2017

Not only with fitness watches, but also with the Raspberry Pi it is possible to measure pulse / heart rates. With a small module – the Raspberry Pi pulse sensor – you can easily measure your own pulse and thus monitor permanently your health condition. This sensor can also be used in mobile Raspberry Pi […]

Configure and read out the Raspberry Pi gas sensor (MQ-X)
Hardware & GPIO
Hardware & GPIO

Configure and read out the Raspberry Pi gas sensor (MQ-X)

Felix - 17. March 2017

Sensors are necessary to detect the components of the air. These are used e.g. in smoke detectors. However, instructions for using these gas sensors at the Raspberry Pi are rare, which is why in this tutorial the general use of such MQ modules at the Raspberry Pi is shown. Thus, e.g. smoke detectors or air […]

50 of the most important Raspberry Pi Sensors and Components
Hardware & GPIO, Projects
Hardware & GPIO, Projects

50 of the most important Raspberry Pi Sensors and Components

Felix - 22. January 2016

One of the many advantages of the Raspberry Pi is that it is possible to connect almost all standard Arduino and Raspberry Pi sensors and components to the various GPIOs. Moreover you can evaluate and / or process the values with programs and other software. This accessory can be used in projects such as Smart […]

Measuring Rotation and acceleration with the Raspberry Pi
Hardware & GPIO, Projects
Hardware & GPIO, Projects

Measuring Rotation and acceleration with the Raspberry Pi

Felix - 30. November 2015

Acceleration and rotation sensors are most known from smartphones. The rotation of the device can be detected and can be addressed directly. With the Raspberry Pi and a Gyroscope / Accelerator sensor it is possible to measure the rotation as well as the acceleration of the 3 axes. In this tutorial I show how to […]

Raspberry Pi Stepper Motor Control with L293D / ULN2003A
Hardware & GPIO
Hardware & GPIO

Raspberry Pi Stepper Motor Control with L293D / ULN2003A

Felix - 14. November 2015

Stepper motors are ideal for applications where it is necessary to know the angle of rotation, for example in robotics. Unlike a normal motor, stepper motors can control the steps individually and can therefore detect the exact position. For easy controlling such a motor, a driver IC like the L293D or the ULN2003 are needed. […]

Using a Raspberry Pi distance sensor (ultrasonic sensor HC-SR04)
Hardware & GPIO
Hardware & GPIO

Using a Raspberry Pi distance sensor (ultrasonic sensor HC-SR04)

Felix - 11. November 2015

For many (outdoor) projects a distance measurement is necessary or advantageous. These small modules are available starting at 1-2 bucks and can measure the distance up to 4-5 meters by ultrasound and are suprisingly accurate. This tutorial shows the connection and control.

Let Raspberry Pi’s communicate with each other per 433MHz wireless signals
Hardware & GPIO, Projects
Hardware & GPIO, Projects

Let Raspberry Pi’s communicate with each other per 433MHz wireless signals

Felix - 26. October 2015

Maybe some of you thought about how to let some RaspberryPi’s communicate with each other wirelessly. For this purpose small 433MHz modules are ideal, which are already available for a few bucks. Therefore in this tutorial I want to show how two (or more) RaspberryPi’s can “talk” with each other. But do not worry, if […]

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