Arduino Driver for Samsung HCS-12SS59T VFDisplay
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README.md

Arduino Driver for Samsung HCS-12SS59T VFDisplay

quick and simple schematics, driver and example

HCS-12SS59T in action

Code

-> source directory

Schematics

Display

display schematics

  • for simple DC filament supply
    connect Vcc to VF+
    mix normal and schottky diodes on VF- for desired voltage
    keeping VF low extends tungsten filament lifetime
    voltages starting with 2.7 V up to 3.6 V are working
    do not exceed 125 mA!
  • -> AC Filament Supply

Anode and Grid Supply

anode + grid supply schematics

  • activate Vdisp
    in VFD.h set SUPPLYMODE 0
  • the simple _VDON with 1N4148 does not switch off Vdisp entirely,
    maybe it can be omitted because the 470 ohm resistor on Vdisp
    restricts current for VFD grid and anode

AC Filament Supply

ac filament supply schematics

  • activate Vdisp
    in VFD.h set SUPPLYMODE 0
  • extended filament endurance
    (-> google filament notching)
  • better brightness distribution
    (theoretical, can't see any difference to DC supply on this display)
  • coil-less

Combined Clocked Supply

clocked supply schematics

  • activate SUCLK_A/B
    in VFD.h set SUPPLYMODE 1

History

V0.5
initial version
V0.6
AC filament supply
V0.7
AC filament supply _VDON
V0.8
AC filament supply polarity correction
V0.9
combined clocked supply

Links

http://www.lapis-semi.com/en/data/datasheet-file_db/display/FEDL9289-01.pdf
https://www.pollin.de/productdownloads/D121466D.PDF
https://www.noritake-elec.com/technology/general-technical-information/vfd-operation
http://www.kerrywong.com/2013/06/05/vfd-filament-driver-using-555/
https://threeneurons.wordpress.com/vfd-stuff/