Build a Stratum 1 NTP (Time) Server

The Raspberry Pi Model B was released in 2012 and, since then, a number of useful applications regarding this device have ensued. However, one particular application that is seldom overlooked when dealing with the Raspberry Pi is its ability to be used as a Stratum 1 NTP server and allow you to synchronize clocks across networks like the Internet. For me, this useful trick has actually made my entire office far more efficient. 

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Video Streaming with Raspberry Pi Camera

In this post we’re going to show you how you can do video streaming with a Raspberry Pi and a Raspberry Pi Camera – how to stream live video into a web page that you can access in any device that has a browser and is connected to the same network the Pi is. This is useful to apply to a home surveillance camera, for example.


  • You should already be familiar with the Raspberry Pi board
  • You should have the Raspbian or Raspbian Lite operating system installed in your Raspberry Pi

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Raspberry Pi GPIO UART Expansion Board

The design is based on the old Raspberry Pi B Serial Expansion Board. The electronics are updated and several functions are added. Dimensions of the expansion unit: 65 mm x 56.5 mm, standard dimensions of an Raspberry Pi HAT expansion unit
GPIO function expansion:

  • 16 independent GPIO interfaces each with power supply and earthing (3V3 level)
  • 2 independent SPI interfaces
  • I2C interface
  • Standard RS232 interface
  • Infra-red Reciever

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