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6 digit split board NIXIE clock. Successful and proven design free to the world! code included!

3 years ago 2577
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This is my final design for a NIXIE clock. I have made several and this is the best one. My gift to the universe is this in the public domain. Feel Free to make one and tell me about if you like.

the arduino code is attached, I suggest you use it as a starting point for your own code. From it you can see what pin is connected to what and how I implemented the multiplexing, you may have a more elegant method, go for it...

dont bother crediting me for any of this, all I did was reinvent something that has been invented a thousand times over. You can build it, understand it and the build something better.

But do sent a photo and/or questions if you like... I'll try to be helpful.

* the BOM is a guideline, not absolute. **

[email protected]


new clock


july 2020


ID Name Designator Footprint Quantity Mounted
1 IN-12A N1,N2,N3,N4,N5,N6 IN-12 6 Yes
2 100k R1,R2,R3,R4,R5,R6 1/8W RESISTOR 6 Yes
3 Optocoupler_SFH617A-1_SingleChannel U1,U2,U3,U4,U5,U6 DIP4 6 Yes
4 74141 U7 DIP16 1 Yes
5 Header-Female-2.54_1x4 P1 HDR-4X1/2.54 1 Yes
6 12v in P2 HDR-1X1/2.54 1 Yes
7 5v P3 HDR-1X1/2.54 1 Yes
8 -L7805 U8 L7805 1 Yes
9 100u CAP CAP-D3.0XF1.5 1 Yes
10 cap 100U CAP-D3.0XF1.5 1 Yes
11 NE555P U9 DIP-8 1 Yes
12 740 740 TO-220 1 Yes
13 100UH L1 100UH-3A 1 Yes 100uH
14 Trimmer POT RV1 3362U 1 Yes
15 470uF C1 CAP-D10.0XF5.0 1 Yes
16 47uF C2 CAP-D16.0XF7.5 1 Yes
17 NPN Q1 TO92 1 Yes
18 1k R14 16W-RES 1 Yes
19 10k R15 16W-RES 1 Yes
20 2n2 C3 RAD-0.1 1 Yes
21 100p C4 RAD-0.1 1 Yes
22 DIODE1N4148 D1 SEEED-DO-35 1 Yes
23 DS1307 U11 DIP8 1 Yes
24 X308032768KGB2SC TXAL1 TXAL-3*8 1 Yes
25 batt. P4 HDR-1X1/2.54 1 Yes
26 Header-Male-2.54_1x1 P5,P6,P7,P8 HDR-1X1/2.54 4 Yes
28 22pf C5,C6 CAP-D10.0XF5.0 2 Yes
29 Push Botton U12,U13,U14 PUSH BUTTON 3 Yes
30 100k R17,R18,R19 AXIAL-0.3 3 Yes
31 ATMEGA328P_PDIP U15 DIP28-300 1 Yes
32 RESISTOR R7,R8,R9,R10,R11,R12 16W-RES 6 Yes
33 2k2 R16 16W-RES 1 Yes
34 220k R13 16W-RES 1 Yes
35 main board P29 HDR-16X1/2.54 1 Yes
36 display board P30 HDR-16X1/2.54 1 Yes
37 330ohm R20,R21 1/8W RESISTOR 2 Yes
38 7651ec780786e892a42427f2e1da4958 LED1,LED2 LED-3MM 2 Yes
39 21f8f80a3f7c3c2b00b33f71a31ff6ef P9,P10 HDR-3X1/2.54 2 Yes


Filename Download
arduino NIXIE clock six digits.txt


The owner does not allow comments in this project now

Comments (5)

Kurisu Reply

This is very exciting!

UserSupport Reply

Wow, this is great project!

UserSupport Reply

Your PCB has a rect at the right-bottom corner, you can find it and delete it , press hotkey K to fit the canvas.

xcv xcv Reply

Thank you again for your work :)
What is the value of resistor R7 to R12 please?

Thank you

RechardP2021 Reply

I'm having trouble with your arduino sketch looks like the libraries have changed if wouldn't mind have taking a look?

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