2 layers76.2 × 50.8 mm
2 layers26 × 31 mm
TSCBreakoutBoard
karlcswanson/CatPatch15PCB Designs for a subsnake system
- Size
- 26 × 31 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 5
- Nets
- 9
- Pads
- 25
- Tracks, vias
- 61, 1
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 18 Apr 2018
- Updated
- 29 Mar 2023
Overview
TSCBreakoutBoard is an open-source printed circuit board by karlcswanson, from the karlcswanson/CatPatch repository on GitHub, published under the MIT licence. It is a 2-layer board of 26 × 31 mm with 5 parts on 9 nets, routed with 61 tracks and 1 via.
It is built around the RJ45.
Main components
1README
README.mdCatPatch
This repository contains images and KiCad files for a CAT5e subsnake and DI system.
A brief build log for the DI and breakout cable can be found here.
Pinouts
The system, as labeled, is pin-compatible with RAT and ETS audio twisted pair products. The silkscreen and wiring can be adjusted to make it compatible with other standards.
| RJ45 Pin | T568B | RAT & ETS | Radial & Whirlwind |
|---|---|---|---|
| 1 | WO | 2+ | 1+ |
| 2 | O | 2- | 1- |
| 3 | WG | 3+ | 2+ |
| 4 | B | 1- | 3+ |
| 5 | WB | 1+ | 3- |
| 6 | G | 3- | 2- |
| 7 | WBr | 4+ | 4+ |
| 8 | Br | 4- | 4- |
Sources
RAT CAT Snake | Radial Catapult | Whirlwind Catdusa
Cable
Shielded cable is needed when using phantom powered, Clear-Com, and DMX devices over twisted pair. These devices require pin 1/ground to work. An EtherCON connector does not indicate that a cable is shielded.
Dynamic mics and passive DIs may work without the recommended shield.
DI
The DI PCB supports the Jensen JT-DB-EPC transformer found in DIs like the Radial JDI. A more affordable transformer can be substituted and can be found in the BOM.
The simplest configuration of the board requires a transformer and 6k81Ω resistor. A stereo summing circuit can be added with a few resistors. See the schematic and the classic RaneNote for more details.
A drill template can be found in the docs folder.
Labels can be printed on standard ID cards and can be attached with 3M Command Strip adhesive.
Frequency Response
I just want the boards, how do I get boards?
The boards used for this project are shared at OSHPARK and can be ordered there.
BOM
Breakout Panel
| Item | Manufacturer | Quantity | Price Each |
|---|---|---|---|
| CH1/10 1U rackmount chassis | Redco | 1 | $66.95 |
| NE8FDV-B Vertical EtherCON | Neutrik | 7 | $4.17 |
| NC3MXX-BAG Male XLR | Neutrik | 28 | $2.96 |
| SBR Rubber Push-In Grommet 1-3/16" ID | - | 1 | $11.80/10 |
| Neutrik Black Screw for etherCon | Neutrik | 14 | $.21 |
| Neutrik DBA-BL D blank | Neutrik | 1 | $.73 |
| Flat Head Screws | - | 2 | $6.49/50 |
| Steel Locknut with Lock Washer | - | 2 | $8.72/100 |
| N8FDV breakout PCB | Custom | 7 | - |
DI Box
| Item | Manufacturer | Quantity | Price Each |
|---|---|---|---|
| Steel Project Box Pre-Punched for 5 D Series XLRs | Pro Speaker Parts | 1 | $16.65 |
| NE8FDV-B Vertical EtherCON | Neutrik | 1 | $4.17 |
| NC3FD-L-1-BAG Panel mount D XLR | Neutirk | 2 | $3.22 |
| NJ3FP6C-BAG Panel mount D TRS | Neutrik | 2 | $5.76 |
| JT-DB-EPC Transformer | Jensen | 1 - 2 | $73.08 |
| OR | |||
| Transformer for PROAV2 and PRODI | Radial | 1 - 2 | $36.00 |
| Neutrik Black Screw for etherCon | Neutrik | 2 | $.21 |
| Flat Head Screws | - | 8 | $6.49/50 |
| Steel Locknut with Lock Washer | - | 8 | $8.72/100 |
| Press-Fit Threaded Standoffs | - | 4 | $9.14/25 |
| Button Head Hex Drive Screw | - | 4 | $11.00/100 |
| N8FDV breakout PCB | Custom | 1 | - |
| DI breakout PCB | Custom | 1 | - |
Project Images
Parts
5| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | CH 1 | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J1 |
| 1 | CH 3 | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J3 |
| 1 | CH 4 | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J4 |
| 1 | CH2 | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J2 |
| 1 | RJ45 | NeutrikSnakeLib:NE8FDV-noHole | J5 |
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Questions
How big is the TSCBreakoutBoard PCB?
It measures 26 × 31 mm and has 2 copper layers, 1.6 mm thick.
What parts does the TSCBreakoutBoard use?
5 parts, built around the RJ45. 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 TSCBreakoutBoard KiCad files?
From the karlcswanson/CatPatch repository on GitHub, at the commit this page was made from: the board is TSCBreakoutBoard/TSCBreakoutBoard.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the TSCBreakoutBoard 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).