2 layers100 × 100 mm
2 layers63.5 × 45.7 mm
Fathom x
bluerobotics/fathom-x5Ethernet capable tether interface board for the Fathom tether.
- Size
- 63.5 × 45.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 25
- Nets
- 29
- Pads
- 96
- Tracks, vias
- 192, 70
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 27 Jan 2016
- Updated
- 7 Oct 2024
Overview
Fathom x is an open-source printed circuit board by bluerobotics, from the bluerobotics/fathom-x repository on GitHub, published under the MIT licence. It is a 2-layer board of 63.5 × 45.7 mm with 25 parts on 29 nets, routed with 192 tracks and 70 vias.
It is built around the 1117-3.3V, B340A and RB1-125BAG1A. Its parts include 6 capacitors, 5 resistors, 3 diodes and 1 IC. It belongs with the interfaces and adapters boards of this library.
Main components
3
1117-3.3V
SOT-223SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSGAOGE MICROCHIPUncategorised
B340A
SMA(DO-214AC)-55℃~+150℃ 1 Independent 3A 40V 500mV@3A 500uA@40V 80A SMA(DO-214AC) Schottky Diodes ROHSDiodes IncorporatedSchottky Diodes
RB1-125BAG1A
弯插0℃~+70℃ 1 Gold Phosphor bronze RJ45 Jack Right Angle Shielded With LED 弯插 Ethernet Connectors / Modular Connectors (RJ45 RJ11) ROHSWIZNETEthernet Connectors / Modular Connectors (RJ45 RJ11)
README
README.mdFathom-X and Fathom-E
The Fathom-X and -E Tether Boards are part of Blue Robotics' Fathom Tether system. These boards provide interfaces and functionality for the communication methods used with the tether. With the Fathom tether, it is quick and easy to get up and running and interface with your ROV or other application.
The schematic and board layout are designed in EagleCAD.
Fathom-E (Simple Ethernet) Hardware
Description
The Fathom-E board provides a simple and economical way to connect the Fathom Tether or a Cat5 cable to an Ethernet jack. It uses all four twisted pairs in the cable and works for tether lengths of up to 100m (per the Ethernet specification).
Fathom-X Hardware
The Fathom-X board has a few advantages over the Fathom-E interface. It uses a HomePlugAV (IEEE1901) module to send 100 Mbps Ethernet with a single twisted pair. This robust connection works over at least 300m tether lengths.
Please see the official documentation for more information.
License
The Fathom Ethernet Hardware Design is released under the MIT License.
Revision History
Fathom-E
rev1 - Works but RJ45 misaligned
rev2 - Production version
Fathom-X
rev1 - Works but poor tether connector used
rev2 - Production version with updated connector
RevB - In progress
Parts
25| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 470 | Fathom-X:R0603 | R2, R4, R5 |
| 2 | 10uF 10V | Fathom-X:EIA3216 | C1, C6 |
| 2 | LEDCHIPLED_0603 | Fathom-X:CHIPLED_0603 | LED1, LED2 |
| 1 | 0.01uF 500V | Fathom-X:C1206 | C4 |
| 1 | 0.1uF | Fathom-X:C0603 | C3 |
| 1 | 0.1uF | Fathom-X:0603-CAP | C5 |
| 1 | 10 1/4W HV | Fathom-X:R1206 | R3 |
| 1 | 1117-3.3V | Fathom-X:SOT223 | IC1 |
| 1 | 130 | Fathom-X:R0603 | R1 |
| 1 | 330pF 50V | Fathom-X:C0805 | C2 |
| 1 | B340A | Fathom-X:SMA-DIODE | D1 |
| 1 | HEADER-210.16MM | Fathom-X:HEADER-10.16MM-2POS | U$8 |
| 1 | LX200V20 | Fathom-X:LX200V20 | U$1 |
| 1 | M023.5MM | Fathom-X:SCREWTERMINAL-3.5MM-2 | JP2 |
| 1 | R-78E-0.5 | Fathom-X:R-78E-0.5 | U$6 |
| 1 | RB1-125BAG1A | Fathom-X:RJ45-MAG-WIZNET | U$5 |
| 1 | TVS-SP4021 | Fathom-X:SOD323-BIDIRECTIONAL | U$4 |
| 1 | USBSMD | Fathom-X:USB-MINIB | JP1 |
| 1 | UT11403S | Fathom-X:UT11403S | U$2 |
| 1 | Unpopulated PCB | BR_Virtual_Parts:BR_NUMS | PCB1 |
| 1 | ~ | BR_Virtual_Parts:BR_Logo | GL1 |
Questions
How big is the Fathom x PCB?
It measures 63.5 × 45.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Fathom x use?
25 parts, built around the 1117-3.3V, B340A and RB1-125BAG1A. 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 Fathom x KiCad files?
From the bluerobotics/fathom-x repository on GitHub, at the commit this page was made from: the board is 1/fathom-x.kicad_pcb and its schematic 1/fathom-x.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Fathom x design in my own project?
Its repository publishes it under the MIT 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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