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2 layers75.5 × 24.5 mmUsb interface, the printed circuit board in 3D

primitive and simple USB interfave for classic Ham Radio transceivers. - Brings the TRX to the 21st century and makes the operation of digi modes reliable and easy. - No more cables and adapters - KiCad based

Size
75.5 × 24.5 mm
Copper layers
2
Thickness
0.57 mm
Parts
97
Nets
84
Pads
265
Tracks, vias
421, 192
Pours
1
Routed
Yes
KiCad
KiCad 6 (file 20211014)
Created
8 Mar 2025
Updated
8 Mar 2025

Overview

Usb interface is an open-source printed circuit board by rkiendl, from the rkiendl/oe2lsp_USB-Interface repository on GitHub, published under the CC0-1.0 licence. It is a 2-layer board of 75.5 × 24.5 mm with 97 parts on 84 nets, routed with 421 tracks and 192 vias.

It is built around the FT231XS-R, PCM2906CDB and TUSB2036VF. Its parts include 39 resistors, 25 capacitors, 4 ICs, 3 transistors and 2 crystals. It belongs with the interfaces and adapters and radio and wireless boards of this library.

Main components

3

README

README.md

USB Interface

primitive and simple USB interfave for classic Ham Radio transceivers.

  • Brings the TRX to the 21st century and makes the operation of digi modes reliable and easy.
  • No more cables and adapters
  • KiCad based

Fits into Yaesu FT987 and FT817 (no Filters installed).

Components used:

  • USB-Hub TUSB2036
  • UART Interface: FT231XS
  • Soundcard PCM2906[C]

PCB FT897 FT817

Down Side:

  • only uses half of dynamic range at RX audio-chain as Yaesu TRX provide half of amplitude the IC can handle.

Parts

97
QtyValueFootprintReferences
12CCapacitor_SMD:C_0603_1608MetricC1, C2, C3, C4, C5, C6, C18, C19, C22, C23, C24, C25
100EResistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR3, R7, R8, R9, R10, R11, R12, R13, R17, R21
9TestPointTestPoint:TestPoint_Pad_1.0x1.0mmTP15, TP16, TP17, TP18, TP19, TP20, TP21, TP22, TP23
8TestPointTestPoint:TestPoint_Loop_D1.80mm_Drill1.0mm_BeadedTP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8
722EResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR1, R2, R6, R22, R23, R35, R36
610uCapacitor_SMD:CP_Elec_6.3x5.9C14, C15, C16, C17, C20, C21
6TestPointTestPoint:TestPoint_Pad_1.5x1.5mmTP9, TP10, TP11, TP12, TP13, TP14
50EResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR14, R15, R16, R39, R41
4100nCapacitor_SMD:C_0603_1608MetricC9, C10, C11, C13
31k5Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR5, R37, R38
23k3Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR43, R45
2470EResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR44, R46
247pCapacitor_SMD:C_0603_1608MetricC7, C8
2Q_NMOS_GSD_BSS138Package_TO_SOT_SMD:SOT-23Q1, Q3
2RResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR19, R20
2npResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR40, R42
1100kResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR34
110kResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR33
112MHzCrystal:Crystal_SMD_HC49-SDY2
11MResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR26
11uCapacitor_SMD:C_0603_1608MetricC12
15.6kResistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolderR32
16MHzCrystal:Crystal_SMD_HC49-SDY1
1FT231XSPackage_SO:SSOP-20_3.9x8.7mm_P0.635mmU3
1LF33Package_TO_SOT_SMD:SOT-223-3_TabPin2U2
1PCM2906(C)Package_SO:SSOP-28_5.3x10.2mm_P0.65mmU4
1Q_PMOS_GSD_PMV74EPEPackage_TO_SOT_SMD:SOT-23Q2
1TUSB2036Package_QFP:LQFP-32_7x7mm_P0.8mmU1
1USB_B_MicroConnector_USB:USB_Micro-B_Amphenol_10103594-0001LF_HorizontalJ1
1n.p.Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR18
1npResistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolderR4

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Questions

How big is the Usb interface PCB?

It measures 75.5 × 24.5 mm and has 2 copper layers, 0.57 mm thick.

What parts does the Usb interface use?

97 parts, built around the FT231XS-R, PCM2906CDB and TUSB2036VF. 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 Usb interface KiCad files?

From the rkiendl/oe2lsp_USB-Interface repository on GitHub, at the commit this page was made from: the board is usb-interface.kicad_pcb and its schematic FTDI.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Usb interface design in my own project?

Its repository publishes it under the CC0-1.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).