2 layers70 × 70 mm
2 layers85.5 × 48.9 mm
Light ring
3nt3/coffee-scale- Size
- 85.5 × 48.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 33
- Nets
- 31
- Pads
- 88
- Tracks, vias
- 253, 33
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 28 May 2026
- Updated
- 28 May 2026
Overview
Light ring is an open-source printed circuit board by 3nt3, from the 3nt3/coffee-scale repository on GitHub. It is a 2-layer board of 85.5 × 48.9 mm with 33 parts on 31 nets, routed with 253 tracks and 33 vias.
Its parts include 14 resistors, 12 diodes, 2 connectors, 1 capacitor and 1 IC. It belongs with the RISC-V boards of this library.
Parts
33| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | 1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2, R3, R4, R5, R6, R7, R10, R11, R12, R13, R14 |
| 12 | LED_Small | kicad-lib:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder_Triangle | D1, D2, D3, D4, D5, D6, D7, D10, D11, D12, D13, D14 |
| 3 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3 | H2, H3, H4 |
| 2 | 4k7 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R8, R9 |
| 1 | 100n | Capacitor_SMD:C_0603_1608Metric | C1 |
| 1 | CH32V003FxPx | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U1 |
| 1 | Conn_01x03_Pin | Connector_JST:JST_SH_SM03B-SRSS-TB_1x03-1MP_P1.00mm_Horizontal | J1 |
| 1 | Conn_01x04_Socket | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J2 |
Questions
How big is the Light ring PCB?
It measures 85.5 × 48.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Light ring use?
33 parts. 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 Light ring KiCad files?
From the 3nt3/coffee-scale repository on GitHub, at the commit this page was made from: the board is pcb/light-ring/light-ring.kicad_pcb and its schematic pcb/coffee-scale.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Light ring design in my own project?
Its repository states no licence, so its author keeps all rights: ask 3nt3 before reusing the design.
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