This type of clocks can be seen at various places from the internet, nothing brand new. Only issue is that it's quite hard to find a detailled instructions on how to do one. Here is my implementation of it along with all the steps required to create one for you.
The clock uses an Arduino and a RTC module to keep up with the time.
Display is done through three 5V analog voltmeters. One for the hours, one for the minutes, and one for the seconds.
Work is in progress on this project, come here soon to see it complete !