2 layers26 × 31 mm
2 layers76.2 × 50.8 mm
TSCSnakeDI
karlcswanson/CatPatch15PCB Designs for a subsnake system
- Size
- 76.2 × 50.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 20
- Nets
- 13
- Pads
- 52
- Tracks, vias
- 40, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 4
- Created
- 18 Apr 2018
- Updated
- 29 Mar 2023
Overview
TSCSnakeDI 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 76.2 × 50.8 mm with 20 parts on 13 nets, routed with 40 tracks and 0 vias.
Its parts include 8 resistors and 6 connectors.
README
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
20| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 475 | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R3, R6, R7 |
| 2 | 20k | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4, R8 |
| 2 | 6k81 | Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R5 |
| 2 | JT-DB-EPC | NeutrikSnakeLib:JT-DB-EPC | T1, T2 |
| 2 | ST IN | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J2, J5 |
| 1 | CH 1 IN | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | J1 |
| 1 | CH 1 OUT | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J3 |
| 1 | CH 2 IN | Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm | J4 |
| 1 | CH 2 OUT | Pin_Headers:Pin_Header_Straight_1x03_Pitch2.54mm | J6 |
The 16 most common of 20 parts.
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Questions
How big is the TSCSnakeDI PCB?
It measures 76.2 × 50.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the TSCSnakeDI use?
20 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 TSCSnakeDI KiCad files?
From the karlcswanson/CatPatch repository on GitHub, at the commit this page was made from: the board is TSCSnakeDI/TSCSnakeDI.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the TSCSnakeDI 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).