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Nixie Tube Control Board

Stustup·C-Nixie_CNIX·Hardware/Control Board/CNIX V2 Control Board/CNIX V2 Control Board.kicad_pcb

Nixie Tube Control Board layout, top view — open source STM32 board by Stustup

About the Nixie Tube Control Board

Nixie Tube Control Board is an open source STM32 PCB design by Stustup, published on GitHub. It is a 2-layer board measuring 165 × 51 mm, with 102 components from 55 distinct parts.

Its main chip is the STM32G051C8T3, from the STM32 family. Other key parts include the AMS1117-3.3 and UCC3803. By type, the board carries 28 capacitors, 28 resistors, 16 test points, 11 connectors, 7 diodes and 4 switches.

It belongs with the displays & leds, power & battery and sensors designs in this gallery.

From the project

Nixie Tube Clock with flexible tube driver

CNIX is a nixie tube clock which accepts many diffrent nixie tubes with only slight modifications to the tube carrier board.

The motivation was, that there are not many clocks out there that let you use almost any nixie tube you like. Most have fixed power supplies, underdesigned driver stages or inflexible microcontrollers. I hope to tackle these problems with an adjustable boost converter PSU, extremely flexible (and electrically protected) driver stages and an open source firmware written with free tools.

Main components on the Nixie Tube Control Board

STM32G051C8T3AMS1117-3.3UCC3803

Nixie Tube Control Board bill of materials (BOM)

102 components, 55 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STM32G051C8T3
U1
1
AMS1117-3.3
AP7361C-33ER-13
U2
1
UCC3803
U100
1
MMBTA42
Q100
1
FDS2734
Q101
1
ABS25-32.768KHZ
Y1
1
EXT
J1
1
Tube Out
J3
1
EXT
J4
1
I2C_EXT
I2C_ext
J5
1
Prog
J6
1
HT
J7
2
GND
J8, J9
1
LED
J10
1
USB_C_Receptacle
J11
1
HT_en
J100
1
Coin Cell
BT1
1
RST
SW1
1
SW_Minus
SW2
1
SW_Menu
SW3
Show 35 more
QtyPartRefs
1
SW_Plus
SW4
16
TestPoint_Small
TP4, TP5, TP6, TP7, TP8, TP9, TP10, TP11 +8
3
LED_red
D1, D2, D3
1
BAT54W
D100
1
ES2G
D101
2
LED_G
D102, D103
1
33u, 4.2A
L100
2
18P
6p
C1, C3
9
100N
100n
C2, C4, C5, C8, C9, C10, C11, C104 +1
2
10U
10u
C6, C12
1
22U
22u
C7
2
220U
220u
C100, C105
1
47U
47u
C101
1
430P
430p
C102
1
220P
220p
C103
1
1n
C107
1
560P
560p
C108
1
100P
100p
C109
1
2u2 250V
C110
1
100nf 250V
C111
2
100n 250V
C112, C114
2
100u 16V
C113, C115
1
10K
10k
R1
10
4K7
4k7
R4, R5, R6, R7, R8, R9, R10, R11 +2
2
5K1
5k1
R13, R14
2
2k
R16, R103
3
1k
R100, R107, R113
2
100K
100k
R101, R102
1
4K12
4k12
R104
1
47K
60k4
R105
1
0R
R106
1
0R1
R108
1
634K
634k
R109
1
7K68
7k68
R110
2
330K
330k
R111, R112

Nixie Tube Control Board design files

The KiCad project lives in the Stustup/C-Nixie_CNIX repository on GitHub; these links point at the commit this page was built from.

Nixie Tube Control Board: common questions

What microcontroller does the Nixie Tube Control Board use?

The Nixie Tube Control Board is built around the STM32G051C8T3, from the STM32 family.

How big is the Nixie Tube Control Board?

The Nixie Tube Control Board measures 165 × 51 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Nixie Tube Control Board?

102 components, from 55 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Nixie Tube Control Board design files?

From the Stustup/C-Nixie_CNIX repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Nixie Tube Control Board design in my own project?

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

Can I test firmware for the Nixie Tube Control Board without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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