2 layers127 × 69.9 mm
Ezcgi
baldengineer/bit-preserve
Project for capturing vintage, classic, aka old computer schematics in KiCad.
34 parts446
2 layers100 × 150 mm
Icom ctcss board
kyleburnsdev/icom-ctcss-boardSelectable CTCSS interface for the Icom IC-229H: KiCad hardware, Carvera Air CAM, enclosure and Arduino firmware documentation.
- Size
- 100 × 150 mm
- Copper layers
- 2
- Thickness
- 1.5 mm
- Parts
- 46
- Nets
- 36
- Pads
- 119
- Tracks, vias
- 242, 0
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 21 Oct 2026
- Updated
- 3 Nov 2026
Overview
Icom ctcss board is an open-source printed circuit board by kyleburnsdev, from the kyleburnsdev/icom-ctcss-board repository on GitHub, published under the MIT licence. It is a 2-layer board of 100 × 150 mm with 46 parts on 36 nets, routed with 242 tracks and 0 vias.
It is built around the 2N3904TAR. Its parts include 15 resistors, 6 capacitors, 6 connectors, 1 IC and 1 transistor. It belongs with the interfaces and adapters boards of this library.
Main components
1README
README.mdIcom IC-229H selectable CTCSS interface
A Pro Micro based interface that adds selectable CTCSS tones to an Icom IC-229H microphone audio path, with PTT forwarding, an encoder, LCD, bypass control and status LEDs.
The schematic and routed PCB prototype are complete; assembly components have been ordered and the PCB is prepared for assembly. The first enclosure iteration is implemented in FreeCAD with print-oriented parts and fit coupons. Pro Micro firmware and a NUCLEO-F767ZI phase-one test driver are implemented, with build, host-test and USB verification. Begin breadboard testing with the phase-one guide; wired timing, UI hardware and analog/radio acceptance remain outstanding. Manufacturing process evidence is recorded separately in the relevant packages.
| Area | Entry point |
|---|---|
| Requirements, parts and build instructions | Project documentation |
| Electronics | KiCad project, with project-local libraries beside it |
| PCB manufacturing | Carvera Air package |
| PCB jig / FreeCAD CAM migration | Required changes and job contract |
| Enclosure | Mechanical workspace |
| Arduino firmware | Firmware workspace |
| Engineering scripts | Tools and dependencies |
| Repository layout and verification | Layout notes |
Open the KiCad project from electronics/ so its project-local symbol and footprint tables resolve. Keep each manufacturing package together when copying it to another machine.
Original project material is licensed under the MIT license. Third-party material retains its own terms; see third-party notices.
Parts
46| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 10k | CTCSS_THT:R_P5.08_CNC | R3, R9, R12, R13, R14, R15 |
| 4 | 100nF | CTCSS_THT:C_Disc_P2.5_CNC | C1, C2, C4, C5 |
| 4 | MountingHole_4mm | MountingHole:MountingHole_4mm | H1, H2, H3, H4 |
| 2 | 100k | CTCSS_THT:R_P5.08_CNC | R5, R11 |
| 2 | 1k | CTCSS_THT:R_P5.08_CNC | R4, R8 |
| 2 | 3.3k | CTCSS_THT:R_P5.08_CNC | R1, R2 |
| 2 | 330 | CTCSS_THT:R_P5.08_CNC | R6, R7 |
| 2 | JigRegistration_4.03mm | CTCSS_THT:JigRegistration_4.03mm | H5, H6 |
| 2 | JigRegistration_4.12mm | CTCSS_THT:JigRegistration_4.12mm | H7, H8 |
| 1 | +5V | CTCSS_THT:TP_CNC | TP3 |
| 1 | +8V | CTCSS_THT:TP_CNC | TP2 |
| 1 | 10k 3296W | CTCSS_THT:RV_3296W_CNC | RV1 |
| 1 | 1uF 63V FILM | CTCSS_THT:C_Film1u_P5_CNC | C3 |
| 1 | 2N3904TAR | CTCSS_THT:Q_TO92_Formed_CNC | Q1 |
| 1 | 4.7k | CTCSS_THT:R_P5.08_CNC | R10 |
| 1 | 4.7uF 63V FILM | CTCSS_THT:C_Film4u7_P15_CNC | C6 |
| 1 | FILTER_2 | CTCSS_THT:TP_CNC | TP5 |
| 1 | GND | CTCSS_THT:TP_CNC | TP1 |
| 1 | J_BYPASS | CTCSS_THT:Header_1x02_CNC | J5 |
| 1 | J_MIC_IN | CTCSS_THT:Header_1x08_CNC | J1 |
| 1 | J_RADIO_OUT | CTCSS_THT:Header_1x08_CNC | J2 |
| 1 | J_UI_ENCODER | CTCSS_THT:Header_1x05_CNC | J3 |
| 1 | J_UI_LCD | CTCSS_THT:Header_1x04_CNC | J4 |
| 1 | J_UI_LEDS | CTCSS_THT:Header_1x04_CNC | J6 |
| 1 | PTT_SENSE | CTCSS_THT:TP_CNC | TP7 |
| 1 | PWM | CTCSS_THT:TP_CNC | TP4 |
| 1 | RADIO_PTT | CTCSS_THT:TP_CNC | TP8 |
| 1 | TONE_INJECTION | CTCSS_THT:TP_CNC | TP6 |
| 1 | Teyleten USB-C 5V/16MHz | CTCSS_THT:ProMicro_CNC_BCu | U1 |
Questions
How big is the Icom ctcss board PCB?
It measures 100 × 150 mm and has 2 copper layers, 1.5 mm thick.
What parts does the Icom ctcss board use?
46 parts, built around the 2N3904TAR. 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 Icom ctcss board KiCad files?
From the kyleburnsdev/icom-ctcss-board repository on GitHub, at the commit this page was made from: the board is electronics/icom-ctcss-board.kicad_pcb and its schematic electronics/icom-ctcss-board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Icom ctcss board 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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