4 layers35 × 100 mm
4 layers60 × 100 mm
Numitronbreakout
aelevine99/NumitronClock- Size
- 60 × 100 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 18
- Nets
- 37
- Pads
- 88
- Tracks, vias
- 162, 12
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 7 Jul 2024
- Updated
- 31 Jul 2025
Overview
Numitronbreakout is an open-source printed circuit board by aelevine99, from the aelevine99/NumitronClock repository on GitHub, published under the GPL-3.0 licence. It is a 4-layer board of 60 × 100 mm with 18 parts on 37 nets, routed with 162 tracks and 12 vias.
It is built around the HV5812WG-G and LDB-350L. Its parts include 5 resistors, 5 ICs, 1 capacitor and 1 connector.
Main components
2
HV5812WG-G
SOIC-28-300mil-40℃~+125℃ 100uA 4.5V~5.5V SOIC-28-300mil Digital Tube Drivers ROHSMicrochip TechnologyDigital Tube DriversLDB-350L
DIP-9-40℃~+71℃ 1 2V~40V 350mA 9V~36V Buck、Boost PWM Short Circuit Protection、Over-Temperature Protection (OTP) DIP-9 Waterproof LED driver power supply ROHSMWLED Drivers
README
README.mdNumitronClock
Project Overview
This project uses soviet IV-12 tubes (they were easier to find than actual Numitrons) for a fun, retro-inspired desk clock. The project is split into two main parts for modularity: a breakout board that can drive 2 tubes, and a control board with 2 outputs for breakout boards. I will update this description and provide documentation as the project evolves.
NUMITRONS!
"Advert for RCA NUMITRON Display Devices". Electronic Design. 22 (12). Hayden: 163. 1974-06-07.
Parts
18| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 1 kΩ | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R4, R5 |
| 2 | 330 Ω | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1, R3 |
| 2 | IV-12 | NewFootprints:iv-12 | U4, U5 |
| 2 | LM317_TO-220 | Package_TO_SOT_THT:TO-220-3_Vertical | U2, U3 |
| 1 | 0.1μF 50V | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1 |
| 1 | 68 Ω | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R2 |
| 1 | Conn_01x06 | NewFootprints:66100811722 | J1 |
| 1 | HV5812WG-G | NewFootprints:SOW28_17P90X7P50_MCH | U1 |
| 1 | LDB-350L | NewFootprints:LDB600L | PS1 |
| 1 | MountingHole_3.2mm_M3_Pad | MountingHole:MountingHole_3.2mm_M3_Pad | M3 SCREW |
The 14 most common of 18 parts.
Questions
How big is the Numitronbreakout PCB?
It measures 60 × 100 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Numitronbreakout use?
18 parts, built around the HV5812WG-G and LDB-350L. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Numitronbreakout KiCad files?
From the aelevine99/NumitronClock repository on GitHub, at the commit this page was made from: the board is numitron breakout/numitronbreakout.kicad_pcb and its schematic controller/numitroncontrol.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Numitronbreakout design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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