IV-4 / IV-17 VFD Tube Clock

This is an attempt to cram a 6-digit 18-segment VFD tube clock onto a pair of breadboards.

Many things left to do, but the clock part works.

The circuit so far includes:

  • 6x IV-4 VFD tubes
  • 4x CD4094 CMOS shift registers
  • 2x CD4504 TTL-CMOS level shifters
  • Atmel ATtiny2313
  • 6.5536 MHz crystal
  • a large number of jumper wires
iv4_clock_0.jpg

Remaining circuit elements will be DC-DC conversion, user interface (buttons), and host communication. Then some more firmware and some software. Then I'll write something up about how it all works.

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