MAKE Flickr pool member shklaw found an old voltmeter in the trash and made it into this awesome Nixie tube clock.

These Nixie tubes are NL-5440A’s. The banana sockets were replaced with switches to set the hours and minutes. When the rotary switch on the left is set to OP, the clock is off, when it it’s set to AC, the clock is on (but can’t be set) and when the switch is set to DC, the clock it still on and you can set the time using the push buttons. The ohms adjust dial on the right controls the brightness of the blue up-lighting (fully off to quite bright!). I used the schematic and PIC code from this site.

[via HackedGadgets]

4 digit multimeter Nixie clock

Complete Nixie tube coverage on Make: Online

Gareth Branwyn

Gareth Branwyn

Gareth Branwyn is a freelance writer and the former Editorial Director of Maker Media. He is the author or editor of over a dozen books on technology, DIY, and geek culture. He is currently a contributor to Boing Boing, Wink Books, and Wink Fun. And he has a new best-of writing collection and “lazy person’s memoir,” called Borg Like Me.

  • Pierce Nichols

    This would be 10x more awesome as a Nixie tube voltmeter.

    • cranky_EE

      I like the way you think!