
Dac
77volatile77/TI-USB-Audio-Devboard
A breadboard adapter for the PCM2906C: A USB 1.1 audio codec made by Texas Instruments. Note: the way the header pinout is defined, this board is only intended to be used as a DAC.

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
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.
primitive and simple USB interfave for classic Ham Radio transceivers.
Fits into Yaesu FT987 and FT817 (no Filters installed).
Components used:

Down Side:
| Qty | Value | Footprint | References |
|---|---|---|---|
| 12 | C | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C4, C5, C6, C18, C19, C22, C23, C24, C25 |
| 10 | 0E | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R3, R7, R8, R9, R10, R11, R12, R13, R17, R21 |
| 9 | TestPoint | TestPoint:TestPoint_Pad_1.0x1.0mm | TP15, TP16, TP17, TP18, TP19, TP20, TP21, TP22, TP23 |
| 8 | TestPoint | TestPoint:TestPoint_Loop_D1.80mm_Drill1.0mm_Beaded | TP1, TP2, TP3, TP4, TP5, TP6, TP7, TP8 |
| 7 | 22E | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2, R6, R22, R23, R35, R36 |
| 6 | 10u | Capacitor_SMD:CP_Elec_6.3x5.9 | C14, C15, C16, C17, C20, C21 |
| 6 | TestPoint | TestPoint:TestPoint_Pad_1.5x1.5mm | TP9, TP10, TP11, TP12, TP13, TP14 |
| 5 | 0E | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R14, R15, R16, R39, R41 |
| 4 | 100n | Capacitor_SMD:C_0603_1608Metric | C9, C10, C11, C13 |
| 3 | 1k5 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R5, R37, R38 |
| 2 | 3k3 | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R43, R45 |
| 2 | 470E | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R44, R46 |
| 2 | 47p | Capacitor_SMD:C_0603_1608Metric | C7, C8 |
| 2 | Q_NMOS_GSD_BSS138 | Package_TO_SOT_SMD:SOT-23 | Q1, Q3 |
| 2 | R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R19, R20 |
| 2 | np | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R40, R42 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R34 |
| 1 | 10k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R33 |
| 1 | 12MHz | Crystal:Crystal_SMD_HC49-SD | Y2 |
| 1 | 1M | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R26 |
| 1 | 1u | Capacitor_SMD:C_0603_1608Metric | C12 |
| 1 | 5.6k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R32 |
| 1 | 6MHz | Crystal:Crystal_SMD_HC49-SD | Y1 |
| 1 | FT231XS | Package_SO:SSOP-20_3.9x8.7mm_P0.635mm | U3 |
| 1 | LF33 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U2 |
| 1 | PCM2906(C) | Package_SO:SSOP-28_5.3x10.2mm_P0.65mm | U4 |
| 1 | Q_PMOS_GSD_PMV74EPE | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | TUSB2036 | Package_QFP:LQFP-32_7x7mm_P0.8mm | U1 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Amphenol_10103594-0001LF_Horizontal | J1 |
| 1 | n.p. | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R18 |
| 1 | np | Resistor_SMD:R_0402_1005Metric_Pad0.72x0.64mm_HandSolder | R4 |

77volatile77/TI-USB-Audio-Devboard
A breadboard adapter for the PCM2906C: A USB 1.1 audio codec made by Texas Instruments. Note: the way the header pinout is defined, this board is only intended to be used as a DAC.


Gadu1in/audio-interface-pcm2906
An audio interface designed for low impedance earbuds and an external 3.5mm microphone input


alvarop/debugotron
Debugotron is a collection of debugging/automation tools I've wanted in the past but didn't have access to. Currently, the tools include:



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