NAS using Raspberry Pi and Open Media Vault

Pi NAS

A simple easy to use Network Attached Storage by using Raspberry Pi and Open Media Vault open source NAS solution. The video demonstrates all detail about the Open Media Vault.  In the making, I have used 2x 1 Tb HDD with  Raspberry Pi.  

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Measure Distance using Ultrasonic Sensor HC – SR04 | Pi4J | JAVA | Raspberry Pi

uLTRASONI pI

This is a simple tutorial showing how to interface HC – SR04  ultrasonic ranging module with Raspberry Pi to measure distance using JAVA. Ultrasonic ranging module HC – SR04 provides 2cm – 400cm non-contact measurement function, the ranging accuracy can reach to 3mm. The modules include ultrasonic transmitters, receiver and control circuit. The basic principle of work: (1) Using IO trigger for at least 10us high-level signal, (2) The Module automatically sends eight 40 kHz and detect whether there is a pulse signal back. (3) IF the signal back, through…

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