

Separator
ESP32-S3 -based IV-22 desk clock
- Size
- 32 × 10 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 10
- Nets
- 7
- Pads
- 29
- Tracks, vias
- 41, 15
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 23 May 2025
- Updated
- 25 Sep 2025
Overview
Separator is an open-source printed circuit board by GraniteGobbler, from the GraniteGobbler/VFDClock repository on GitHub. It is a 2-layer board of 32 × 10 mm with 10 parts on 7 nets, routed with 41 tracks and 15 vias.
It is built around the BSS138. Its parts include 2 capacitors, 2 resistors, 2 diodes, 1 transistor and 1 connector.
Main components
1README
README.mdVFDClock
A table clock with 7-segment VFD tubes running on an ESP32-S3 MCU.

Showcase

Parts
10| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | 100n | Capacitor_SMD:C_0805_2012Metric | C1, C2 |
| 2 | 10k | Resistor_SMD:R_0805_2012Metric | R1, R2 |
| 2 | Inolux_IN-PI554FCH | LED_SMD:LED_Inolux_IN-PI554FCH_PLCC4_5.0x5.0mm_P3.2mm | D1, D2 |
| 2 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_ISO14580_Pad_TopBottom | H1, H2 |
| 1 | BSS138 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | COL_CONN | Connector_PinHeader_2.00mm:PinHeader_2x02_P2.00mm_Vertical | J1 |
Questions
How big is the Separator PCB?
It measures 32 × 10 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Separator use?
10 parts, built around the BSS138. 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 Separator KiCad files?
From the GraniteGobbler/VFDClock repository on GitHub, at the commit this page was made from: the board is separator_pcb/Separator.kicad_pcb and its schematic module_pcb/Module.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Separator design in my own project?
Its repository states no licence, so its author keeps all rights: ask GraniteGobbler before reusing the design.
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