IV-4 VFD tube clock progress

Posted on 30 Jan 2011 02:10

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

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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Blog tags: attiny2313 clock iv-17 iv-4 tube vfd

Ask a serious musician...

Posted on 28 Jan 2011 23:32


Would you rather have a vintage instrument or a brand new instrument? (Assume both choices are of high quality.)

There is no "right" answer to this question. The answer they give you and the reasoning behind it tells you something about the tastes and personality of the artist.

Same is true for most any creative pursuit. I prefer vintage myself. Not because it's "best," but because it's most authentic to my personality.

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There are four kinds of software

Posted on 27 Jan 2011 06:13

  1. Software that is open source.
  2. Software that isn't open source but should be.
  3. Software that should never be made in the first place.
  4. Software that I don't care about.

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These VFD tubes are multiplying

Posted on 18 Jan 2011 00:50

…they must be up to something


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Blog tags: iv-17 iv-4 tube vfd

IV-6 VFD email counter on half-size breadboard

Posted on 11 Jan 2011 00:28


I needed the other breadboard for another project, and I'm always looking to simplify and reduce things.

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Blog tags: iv-6 tube vfd

IV-4 VFD tubes

Posted on 08 Jan 2011 05:29

Here are couple of IV-4 tubes doing a little demo. They are controlled (so far) by 2 CD4504 level shifters, driven by an atmega8. Duty cycle for each tube is 50%. +18V for the grid/segments is supplied by the usual boost converter circuit.

I have more in mind for these tubes, and will be back with an update.

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Blog tags: iv-4 tube vfd

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