Tag: python

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

Felix - Mar 25, 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 […]

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

Felix - Mar 17, 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 […]

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

Felix - Nov 14, 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)
GPIO
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GPIO
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Using a Raspberry Pi distance sensor (ultrasonic sensor HC-SR04)

Felix - Nov 11, 2015

For many (outdoor) projects a distance measurement is necessary or advantageous. These small modules are available starting atĀ 1-2 bucks and canĀ 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
GPIO, Projects
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GPIO, Projects
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Let Raspberry Pi’s communicate with each other per 433MHz wireless signals

Felix - Oct 26, 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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