Arduino Driver for Samsung HCS-12SS59T VFDisplay

quick and simple schematics, driver and example

Code

-> source directory

Schematics

Display

• 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

• 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

• 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

• 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/