2 layers85 × 56 mm
2 layers74.8 × 20 mm
Biscotti
Essenceia/Ethernet_PCB3Central PCB repository for the open-source networking equipement project.
- Size
- 74.8 × 20 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 38
- Nets
- 32
- Pads
- 136
- Tracks, vias
- 291, 30
- Pours
- 4
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 22 Jul 2026
- Updated
- 26 Jul 2026
Overview
Biscotti is an open-source printed circuit board by Essenceia, from the Essenceia/Ethernet_PCB repository on GitHub, published under the CERN-OHL-S-2.0 licence. It is a 2-layer board of 74.8 × 20 mm with 38 parts on 32 nets, routed with 291 tracks and 30 vias.
It is built around the LAN8720A-CP. Its parts include 18 resistors, 14 capacitors, 4 connectors and 1 IC.
Main components
1README
README.mdPCBs for Coffee-Shop project
Biscotti
x1 Ethernet Pmod for full-duplex 100BASE-TX over RMII using the LAN8720A chip.
AI Policy
No AI was used by me in the development of this hardware.
All code and design decisions are, and will remain, entirely human made.
License
Copyright Julia Desmazes, 2026
This hardware is distributed under the strongly reciprocal CERN Open Hardware Licence Version 2 unless otherwise specified.
Parts
38| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 4.7k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R6, R7, R8, R9, R10, R11 |
| 4 | 0.1uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C6, C10, C13 |
| 4 | 10 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R2, R3, R4, R5 |
| 4 | 12pF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C4, C5, C7, C9 |
| 4 | 1uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2, C8, C11, C14 |
| 4 | 49.9 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R12, R14, R15, R16 |
| 2 | 332 | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R17, R18 |
| 1 | 1.5k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R1 |
| 1 | 12.1k | Resistor_SMD:R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R13 |
| 1 | 22nF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C12 |
| 1 | 470pF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C3 |
| 1 | Conn_01x01 | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | J3 |
| 1 | Conn_02x01 | Connector_PinHeader_2.54mm:PinHeader_2x01_P2.54mm_Vertical | J1 |
| 1 | Conn_02x06_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x06_P2.54mm_Vertical | J2 |
| 1 | FerriteBead | Inductor_SMD:L_1206_3216Metric_Pad1.22x1.90mm_HandSolder | FB1 |
| 1 | LAN8720A | Package_DFN_QFN:VQFN-24-1EP_4x4mm_P0.5mm_EP2.5x2.5mm_ThermalVias | U1 |
| 1 | RJ45_Halo_HFJ11-x2450E-LxxRL | Connector_RJ:RJ45_HALO_HFJ11-x2450E-LxxRL_Horizontal | J4 |
Questions
How big is the Biscotti PCB?
It measures 74.8 × 20 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Biscotti use?
38 parts, built around the LAN8720A-CP. 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 Biscotti KiCad files?
From the Essenceia/Ethernet_PCB repository on GitHub, at the commit this page was made from: the board is biscotti/biscotti.kicad_pcb and its schematic biscotti/biscotti.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Biscotti design in my own project?
Its repository publishes it under the CERN-OHL-S-2.0 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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