2 layers68.6 × 53.3 mm
4 layers34 × 12.5 mm
Farpatch Lite
farpatch/hardware-lite1Lite version of the Farpatch hardware
- Size
- 34 × 12.5 mm
- Copper layers
- 4
- Thickness
- 4.69 mm
- Parts
- 36
- Nets
- 61
- Pads
- 205
- Tracks, vias
- 350, 67
- Pours
- 5
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 27 Aug 2022
- Updated
- 28 Aug 2022
Overview
Farpatch Lite is an open-source printed circuit board by farpatch, from the farpatch/hardware-lite repository on GitHub. It is a 4-layer board of 34 × 12.5 mm with 36 parts on 61 nets, routed with 350 tracks and 67 vias.
It is built around the ESP32-S3. Its parts include 14 capacitors, 7 connectors, 4 resistors, 2 ICs and 2 switches. It belongs with the ESP32 boards of this library.
Main components
1README
README.mdFarpatch Lite
A lite version of Farpatch -- a wireless debugger based on Black Magic Probe.
Differences from the full version
- Farpatch Lite is smaller, and can fit into smaller areas
- There are no level shifters or voltage regulators -- your target MUST run at 3.3V!
- There are no damping resistors, which might affect signal integrity with the target
- There is no separate UART connector -- UART is integrated onto the SWD connector
- There is only one LED on the PCB
Farpatch Lite can be designed as a two-layer PCB, but a four-layer PCB stackup is preferred for signal integrity purposes.
Parts
36| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | Cap 100nF 0402 | Capacitor_SMD:C_0402_1005Metric | C9, C10, C11, C12, C14, C28 |
| 4 | Cap 1uF 0402 | Capacitor_SMD:C_0402_1005Metric | C4, C7, C8, C13 |
| 2 | Cap 12pF 0402 | Capacitor_SMD:C_0402_1005Metric | C15, C16 |
| 2 | Cap 3.9pF 0402 | Capacitor_SMD:C_0402_1005Metric | P2, P5 |
| 2 | L 2.7 nH 0402 | Inductor_SMD:L_0402_1005Metric | P3, P4 |
| 2 | Pushbutton 4.2x3.2mm 250gf | Farpatch-Lite:SW_SPST_PTS810 | SW1, SW2 |
| 2 | R 5.1k 0402 | Resistor_SMD:R_0402_1005Metric | R8, R10 |
| 1 | Antenna Trace | Farpatch-Lite:Texas_SWRA117D_2.4GHz_Left | A1 |
| 1 | Cap 10nF 0402 | Capacitor_SMD:C_0402_1005Metric | C5 |
| 1 | Cap 10uF 0603 | Capacitor_SMD:C_0603_1608Metric | C6 |
| 1 | Cap 2.4pF 0402 | Capacitor_SMD:C_0402_1005Metric | P1 |
| 1 | Crystal 40MHz 2016 | Crystal:Crystal_SMD_2016-4Pin_2.0x1.6mm | Y1 |
| 1 | ESP32-S3 | Farpatch-Lite:QFN-56-1EP_7x7mm_P0.4mm_EP5.6x5.6mm_ThermalVias | U4 |
| 1 | Farpatch Logo | Farpatch-Lite:Farpatch Logo | LOGO1 |
| 1 | Flash 256 Mbit SPI | Farpatch-Lite:WSON-8_8x6mm_P1.27mm | U5 |
| 1 | L 2.2nH 0402 | Inductor_SMD:L_0402_1005Metric | L3 |
| 1 | L 20nH 0402 | Inductor_SMD:L_0402_1005Metric | L4 |
| 1 | Logo_Open_Hardware_Small | Symbol:OSHW-Logo_5.7x6mm_SilkScreen | LOGO2 |
| 1 | Red LED 0402 | Farpatch-Lite:LED_0402_1005Metric | D3 |
| 1 | Res 200 0402 | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | Res 20k 0402 | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | SWD Connector | Connector_PinHeader_1.27mm:PinHeader_2x05_P1.27mm_Vertical | J2 |
| 1 | USB-C Receptacle (USB2.0) | Farpatch-Lite:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J3 |
Questions
How big is the Farpatch Lite PCB?
It measures 34 × 12.5 mm and has 4 copper layers, 4.69 mm thick.
What parts does the Farpatch Lite use?
36 parts, built around the ESP32-S3. 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 Farpatch Lite KiCad files?
From the farpatch/hardware-lite repository on GitHub, at the commit this page was made from: the board is Farpatch-Lite.kicad_pcb and its schematic Farpatch-Lite.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Farpatch Lite design in my own project?
Its repository states no licence, so its author keeps all rights: ask farpatch before reusing the design.
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