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Vfd display

eshazen·retro-25·hardware/vfd-display/vfd-display.kicad_pcb

Vfd display PCB layout, top view — open source board by eshazen

About the Vfd display PCB

Vfd display is an open source PCB design by eshazen, published on GitHub. It is a 2-layer board measuring 200 × 65 mm, with 44 components from 17 distinct parts.

Other key parts include the IV-6, HV5812, LM1084-ADJ, 74LS125 and 74LS174. By type, the board carries 20 ICs, 12 capacitors, 7 resistors, 3 connectors and 2 diodes.

It belongs with the displays & leds and retro computing designs in this gallery.

From the project

Retro-tech HP-25 calculator clone using Z80

This is branch "ScopeClock". Building up another CPU board for used as a general purpose computer for the scope clock, along with the DAC/Interface board from that project, which (whew!) has an actual UART for the serial port.

Time for something new! The VFD HP-25 is cool and all, but I've lusted after an HP-97 most of my life, plus I love nixie tubes! Starting to think about a nixie-display HP-97 emulator. Probably no card reader, but a small printer is certainly doable. Inspiration from Oliver De Smet (archived elswhere in this repository just in case):

Vfd display, from the project README
From the project README

Main components on the Vfd display

IV-6HV5812LM1084-ADJ74LS12574LS174

Vfd display bill of materials (BOM)

44 components, 17 distinct parts.

QtyPartRefs
12
IV-6
U1, U2, U5, U6, U7, U8, U9, U10 +4
5
HV5812
U3, U4, U11, U12, U17
1
LM1084-ADJ
U16
1
74LS125
U19
1
74LS174
U20
1
conn_2x3
J1
1
Conn_01x06_Male
J2
1
Conn_02x08_Odd_Even
J3
2
LED
D1, D2
7
.01uF
C1, C2, C5, C7, C9, C11, C12
2
1uF 50V
C3, C6
2
10uF
C4, C10
1
10nF 50V
C8
1
100
R1
1
OMIT
R2
3
10k
R3, R5, R6
2
470
R4, R7

Vfd display design files

The KiCad project lives in the eshazen/retro-25 repository on GitHub; these links point at the commit this page was built from.

Vfd display: common questions

How big is the Vfd display PCB?

The Vfd display measures 200 × 65 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Vfd display?

44 components, from 17 distinct parts. The full bill of materials is listed on this page.

Where can I download the Vfd display design files?

From the eshazen/retro-25 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Vfd display design in my own project?

The repository has no license, so all rights stay with eshazen. Use it as a reference, and ask the author before reusing the design.

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