We’ve told you about these ultra-cool steampunk clocks with Nixie tubes displays. Nixie tubes are “the LEDs of yesteryear” that used to be used for displays on scientific equipment, voltmeters, counters, and control panels. They’re no longer in production, but ThinkGeek found some limited-edition kits that let you build your own clock with an alarm function and that can even tick, if you like. The clocks can be set to 12/24 hour display, and you can set time zone and daylight savings time settings. The base has steel hardware and blue LED accent lights. The clock is microprocessor-controlled (comes with a microUSB cable), and it can even send IR data packets to another clock. ThinkGeek also says this Nixie clock “can be used to create your own Divergence Meter straight out of Steins;Gate if you can figure out what algorithm determines the Divergence Value of the current world line in relation to the absolute world line of 0% and plug that in.” They warn that this kit has a lot of pieces and requires intermediate-to-advanced skill levels. The DIY Nixie Tube Clock Kit is $199.99 from ThinkGeek.