

Bcd2civ
Converter from Yaesu BCD to Icom CI-V band data
- Size
- 70 × 45 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 61
- Nets
- 53
- Pads
- 165
- Tracks, vias
- 471, 60
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 1 Oct 2024
- Updated
- 8 Aug 2025
Overview
Bcd2civ is an open-source printed circuit board by ra0sms, from the ra0sms/bcd2civ repository on GitHub, published under the MIT licence. It is a 2-layer board of 70 × 45 mm with 61 parts on 53 nets, routed with 471 tracks and 60 vias.
It is built around the CH32V003F4P6, 74HC244D and BC817, with the LL4148 among its other parts. Its parts include 18 resistors, 11 capacitors, 8 fuses, 6 diodes and 6 connectors. It belongs with the radio and wireless boards and the RISC-V boards of this library.
Main components
4CH32V003F4P6
TSSOP-20-175milTSSOP-20-175mil Microcontrollers (MCU/MPU/SOC) ROHSWCH (Nanjing Qinheng Microelectronics)Microcontrollers (MCU/MPU/SOC)74HC244D
SO-20-300mil-40℃~+125℃ 160uA 2 2V~6V 4 6mA 6mA 74HC 9ns@5V,15pF Tri-State Unidirectional SOIC-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffers, Drivers, Receivers, TransceiversBC817
SOT-231 NPN 100nA 150MHz 300mW 40 45V 500mA 5V 700mV NPN SOT-23 Bipolar (BJT) ROHSShikuesBipolar (BJT)LL4148
LL-341 Independent 1V@10mA 200mA 4A 4ns 500mW 5uA@75V 75V LL-34 Switching Diodes ROHSMDDSwitching Diodes
README
README.mdConverter Yaesu BCD to Icom CI-V band data
A simple board is based on risk-v MCU CH32V003F4P6.

- Dimensions: 70*45 mm
- Consumption current: 20 mA
- Power supply: from 7 to 20VDC
- CI-V address: 0x7A
- Baud rate for EW3MM tuner: 9600 kb/s
- Baud rate for DJ0ABR controller: 4800 kb/s
Firmware for DJ0ABR controller
More information - https://ra0sms.com/bcd2civ
Yaesu BCD band data:

Schematic:

Parts
61| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 1k | Resistor_SMD:R_1206_3216Metric | R5, R6, R7, R8, R9, R10, R11, R12, R13 |
| 8 | 100n | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2, C3, C4, C5, C7, C8, C9, C11 |
| 8 | Fuse | Resistor_SMD:R_1206_3216Metric | F1, F2, F3, F4, F5, F6, F7, F8 |
| 7 | 10k | Resistor_SMD:R_1206_3216Metric | R1, R2, R3, R4, R14, R15, R17 |
| 4 | , , , | ||
| 2 | 10u | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1, C6 |
| 2 | 34k | Resistor_SMD:R_1206_3216Metric | R16, R18 |
| 2 | BC817 | Package_TO_SOT_SMD:SOT-23 | Q1, Q2 |
| 2 | LOGO | LOGO | G***, G*** |
| 1 | 10n | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C10 |
| 1 | 10u | Inductor_SMD:L_1206_3216Metric | L1 |
| 1 | 7-15VDC | TerminalBlock_MetzConnect:TerminalBlock_MetzConnect_Type055_RT01502HDWU_1x02_P5.00mm_Horizontal | J1 |
| 1 | 74HC244 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U3 |
| 1 | A | LED_SMD:LED_1206_3216Metric | D3 |
| 1 | B | LED_SMD:LED_1206_3216Metric | D4 |
| 1 | BCD INPUT | TerminalBlock_MetzConnect:TerminalBlock_MetzConnect_Type011_RT05505HBWC_1x05_P5.00mm_Horizontal | J2 |
| 1 | BCD OUTPUT 1 | TerminalBlock_MetzConnect:TerminalBlock_MetzConnect_Type011_RT05505HBWC_1x05_P5.00mm_Horizontal | J4 |
| 1 | BCD OUTPUT 2 | TerminalBlock_MetzConnect:TerminalBlock_MetzConnect_Type011_RT05505HBWC_1x05_P5.00mm_Horizontal | J5 |
| 1 | C | LED_SMD:LED_1206_3216Metric | D5 |
| 1 | CH32V003F4P6 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U2 |
| 1 | CI-V | TerminalBlock_MetzConnect:TerminalBlock_MetzConnect_Type055_RT01502HDWU_1x02_P5.00mm_Horizontal | J6 |
| 1 | D | LED_SMD:LED_1206_3216Metric | D6 |
| 1 | LINK | LED_SMD:LED_1206_3216Metric | D2 |
| 1 | LL4148 | Diode_SMD:D_MiniMELF | D1 |
| 1 | RS3002-5.0YF5 | Package_TO_SOT_SMD:SOT-23-5 | U1 |
| 1 | SWD | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Vertical | J3 |
Questions
How big is the Bcd2civ PCB?
It measures 70 × 45 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Bcd2civ use?
61 parts, built around the CH32V003F4P6, 74HC244D, BC817 and LL4148. 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 Bcd2civ KiCad files?
From the ra0sms/bcd2civ repository on GitHub, at the commit this page was made from: the board is KiCad/bcd2civ/bcd2civ.kicad_pcb and its schematic KiCad/bcd2civ/bcd2civ.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Bcd2civ 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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