Help! Russian Datasheet translation VFD ILV-M2 5/7  - Page 1
Forum section: electronics / projects

author: halexa
author_rank: Regular Contributor
timestamp: October 24, 2015, 09:12:25 am
content: Hi,Got a russian VFD display that i like to play around with. I only got a russian datasheet for it and since my knowledge in russian is very poor i need some help.I manage to get some data from google translate and som wild guessing. But there are some question marks still.This is what i got so far from the datasheet.PIN 1: segment line 1, redPIN 2: cathodePIN 3: segment line 2, redPIN 4: grid column 2PIN 5: segment line 3, redPIN 6: grid column 3PIN 7: segment line 4, redPIN 8: segment line 5, redPIN 9: grid column 4PIN 10: segment line 6, redPIN 11: cathodePIN 12: segment line 7, redPIN 13: segment line 7, greenPIN 14: cathode, wire?filament???PIN 15: grid column 5PIN 16: segment line 6, greenPIN 17: segment line 5, greenPIN 18: segment line 4, greenPIN 19: segment line 3, greenPIN 20: segment line 2, greenPIN 21: grid column 1PIN 22: segment line 1, greenred segment 50Vgreen segment 25Vgreen segment 4mAred segment 6mAfilament 2.8V/4.5mAAm I missing some crutial information? This is the first time i use a VFD display so I do not know excatly what data is needed to get this diplay running without breaking it.If some with knowlege in the russian language is willng to help, it will be much apreciated.Original data sheet was found here:http://www.tube-tester.com/sites/nixie/dat_arch.htm

author: amyk
author_rank: Super Contributor
timestamp: October 24, 2015, 03:00:56 pm
content: 14 cathode; connected to the conductive layer of the inner surface of the cylinder.

author: halexa
author_rank: Regular Contributor
timestamp: October 24, 2015, 09:50:52 pm
content: Quote from: amyk on October 24, 2015, 03:00:56 pmThank you,Next question; am I understanding it correct that the grid voltage shalll be 25V? By grid i mean pin 4, 6, 9, 15 and 21.

author: Gall
author_rank: Frequent Contributor
timestamp: October 25, 2015, 12:04:38 am
content: Indication type: dot matrixColor: red, greenMatrix type: 5x7 (5x14)Brightness:red 700 kd/m^2green 250 kd/m^2Brightness non-unifority: 60%Brightness, old/worn display:red 140 kd/m^2green 60 kd/m^2Size:visible area 30x45 mmpixel 2x2 mmArea of emitting parts: 48mm^2Number of emitters: 70Visible angle: 45 degStart-up time: < 0.1 sFilament voltage: 2.8 VFilament voltage allowed: 2.5-3.1 VGrid negative OFF voltage: -5 V minGrid voltage: 25 VPulsed anode voltage:red 50V maxgreen 25V maxFilament current: 225 mAFilament current range: 200-250 mACurrent of all pixels of one column:red 4 mAgreen 6 mAGrid current: 4.5 mAFilament on/off cycles before fault: 10000(duty 1:5)Ambient temperature: -45..+70 deg CTime before fault: > 20000 h

author: Gall
author_rank: Frequent Contributor
timestamp: October 25, 2015, 12:10:03 am
content: 1 = anodes row 1, red2 = cathode3 = anodes row 2, red4 = grid of column 25 = anodes row 3, red6 = grid of column 37 = anodes row 4, red8 = anodes row 5, red9 = grid of column 410 = anodes row 6, red11 = cathode12 = anodes row 7, red13 = anodes row 7, green14 = cathode, internal shielding15 = grid of column 516 = anodes row 6, green17 = anodes row 5, green18 = anodes row 4, green19 = anodes row 3, green21 = grid of column 122 = anodes row 1, green

author: Gall
author_rank: Frequent Contributor
timestamp: October 25, 2015, 12:20:49 am
content: These VFD displays are basically triodes. The cathode is common, grids and anodes are multiplexed.Apply 2.8V 225mA to the filament. You'll able to see the filament lighting weak red in the darkness. Then, apply a positive (with respect to the cathode) voltage to both the grid and the anode. Anything about 20V should be fine; most displays work well even at 9V. The maximum allowed voltage is 50V for red segments and 25V for green ones and grids. So just choose 24V.If the anode voltage is high enough, the anode may happen to emit light even with zero voltage on the grid. In this case you may need to apply negative voltage to the grid. The datasheet guarantees that -5V is enough to dim the segment.It is safe to apply negative voltages to anodes. This suggest the possible connection: grids and anodes to outputs of 24V logic, and cathode to +5V. This gives -5..+19V range which should be fine. It may even work with 40xx series ICs with 15V or 18V power, just with reduced brightness.

author: halexa
author_rank: Regular Contributor
timestamp: October 25, 2015, 06:55:59 am
content: @Gall, Awsome!Thankyou for the help. Now i have all the info i need to start the design.