What are we talking about? Today I’ll talk about this magnificent little device found on eBay : the Efratom M-100.First of all, what is a Rubidium Frequency Standard? It’s an atomic clock.Just in the 80-90 they were such an expansive units! The working mechanism is fascinating. It uses the hyperfine transition of electrons in rubidium-87 atoms […]
During these days i was searching for something modular and scalable that can gives me a clear PPS ( http://en.wikipedia.org/wiki/Pulse_per_second ) from a GPS satellite with some datas like UTC times.I’ve tested the Arduino UNO board with the Adafruit GPS module. It’s very easy to use them on a little breadboard. The Adafruit GPS is […]
So now we should have our little Unix server running into the WandBoard with SSH running and SFTP of course. Let’s have fun installing NTP client ! First of all we should want have a precise clock. FreeBSD is capable to use NTP protocol as server or client. The protocol is a UDP so it […]
In the previous post I did a quick overview of what I think are two valid alternatives to the common development boards as Raspberry or BeagleBoard. Radxa and Wandboard. Since i would like to use the Wandboard as a little backup server I’ve decided to put inside it FreeBSD 10.1 . So this guide will […]
Delta² 