Voltage switching for 18 segment VFDs

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Discussion Overview

The discussion revolves around the implementation of voltage switching for 18 segment vacuum fluorescent displays (VFDs). Participants explore circuit design options for independently lighting each segment using an integrated circuit (IC) and consider various driver options.

Discussion Character

  • Technical explanation, Debate/contested, Experimental/applied

Main Points Raised

  • One participant describes their project involving 18 segment VFDs and seeks advice on using an IC to control segment lighting with a transistor.
  • Another participant suggests using VFD drivers, specifically mentioning the 5018 and 5012 models, based on their experience with similar equipment.
  • A different participant expresses difficulty finding information on the 5018 and 5012 drivers and mentions considering the NJR 3426 driver for its user-friendliness, while also expressing a preference for creating a custom circuit using the Spin language.
  • One participant corrects their earlier mention of driver models, clarifying that the correct models are 5812 and 5818.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the best driver options, with some suggesting specific models while others express uncertainty about their availability and suitability. The discussion remains unresolved regarding the optimal approach for circuit design.

Contextual Notes

Participants mention specific driver models without providing details on their specifications or compatibility with the VFDs. There is also a lack of consensus on the best method for controlling the segments, with varying levels of familiarity with programming languages affecting preferences.

vfd18
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I have a project with old 18 segment vacuum fluorescent tubes. I provide 1.5 volts for the filaments, 48 volts on the anode, and 48 volts on the segment(s) and they light well. I want to light each segment independently using an IC (parallax propeller) that will use 3.3 volts to turn on or off each segment by way of an (NPN?) transistor. Any suggestions for the circuit or is there an easier way than transistors?

Thanks!
 
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Sure. There are VFD drivers available. Take a look at 5018 and 5012 drivers. Can't say for sure if they are specifically designed for this but I have worked on equipment that uses them in that particular manner.
 
Have not found anything of a 5018 or 5012 driver on the net. Who manufactures these?

I have flirted with the idea of the maxim series before and more specifically the NJR 3426 as it seems more user friendly. But I am looking for a way to make my own circuit to drive the tubes if possible since I am more familiar with the Spin language of the Propeller than C++ that I would need to use for the NJR (or maxims).
 
My apologies. It is not 5012 and 5018, it is 5812 and 5818.
 

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