Blog

Timezones

Do you know the “Olson database”? It’s the database in which all the timezones of the world are described. The timezones of the present - and also of the past. See the wikipedia article tz database for more information.

Read more...


Big or Little

Every number has an ending. Sometimes it’s big, sometimes it’s little. When you are dealing with a number, that’s greater than what fits into 1 byte, you’ll need more space to store the number. Then the order of the bytes matters. This post is about the endianess, whether it’s big-endian or little-endian.

Read more...


Providing a dual stack service behind a native ipv6 and carrier-grade NAT ISP

Suppose, you have an ISP that provides you with native ipv6 connectivity. This means, you have been assigned a globally routeable IP version 6 address -yay!! However, this comes with a cost: You don’t have a globally routeable IP version 4 address, not even a dynamic one. And this is still necessary, if you want to be able to reach your service, e.g. from cell phone networks.

Read more...


DSO-068 DIY oscilloscope

Recently I thought, isn’t there a simple, cheap oscilloscope available? And there is: A do-it-yourself kit, all parts included, ready for you to solder. Elektor provides the DSO-068 complete with casing.

Read more...


Andreas Dangel | subscribe via RSS | adangel | © Copyright 2017. adangel.org (03 December 2017)