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Showing content from https://github.com/Sev5000/RP2350B_DualADC_DualPCM below:

Sev5000/RP2350B_DualADC_DualPCM: A PCB to neatly package a rp2350b with two 12bit high speed adc and four channel audio input for use with hsdaoh

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This is a PCB to neatly package a RP2350B, two AD9226 ADC PCBs and two PCM1802 audio boards for capture with hsdaoh. Specifically designed to still be usefull without smds (no head switch input then). Through-hole soldering only works just fine.

For use with https://github.com/steve-m/hsdaoh-rp2350/tree/pcm1802

Features:

• Two 12bit 40MS/s ADCs
• Four channel audio input all with a common clock
• No SMD soldering needed! Works fine just connecting breakout boards
• Socket for a Pimoroni PGA2350 and RP2350 and its periphery
• The protected head switch input has footprints for edge and horizontal SMA/SMB (SMD soldering needed)
• Socket for USB C and Micro B breakouts

Bill of material:

• 1x This PCB (Send the Gerber .zip to JLC, PCBWay, ..)
• 1x Pimoroni PGA2350
• 2x AD9226: https://aliexpress.com/item/1005003038271519.html
• 2x PCM1802: https://aliexpress.com/item/1005006412873984.html
• 4x RCA-105 or RCA-106: https://aliexpress.com/item/1005006152724809.html
• 2x 9pin 2.54mm pin-socket header
• 2x 2x10pin 2.54mm pin-socket header
• 2x 3pin 2.54mm pin header (remove the center pin for connecting R/L of the PCM1802)
• 2x 3pin 2.54mm pin-socket header (remove the center pin for connecting R/L of the PCM1802)
• 1x vertical 6mm push button: https://aliexpress.com/item/1005005831153897.html (horizontal soldered in vertical and a drop of glue for stability works as well)

No SMD variant:

• 1x Adafruit DVI breakout board
• 4x 2x8pin 2.54mm pin-socket header
• Either Adafruit USB Micro-B Breakout Board or Adafruit USB C Breakout Board

SMD Variant with PGA2350:

• Regular HDMI connector
• micro USB connector
• 8× 0402 270 ohm resistors
• 4x 0805 100nF ceramic capacitors
• For experimental EDID communication and HPD: 4x SOD123 3.3V Zener, 4x 0402 ~27 ohm resistors, 2x 0402 2k2 ohm resistors

For head switch input:

• 1x SOD123 3.3V zener diode
• 1x SOD123 standard diode
• 1x 0805 1k resistor
• 1x edge SMA/SMB or horizontal SMA/SMB and/or 2pin header

Notes:

• Soldering the RP2350B and its periphery might work but was not tested so far.
• The PCM1802 board needs MODE0 (MODE1 only with previous HSDAOH releases) bridged and connected to 3.3V with a wire (Those boards have a design error): NOTE: Picture shows the configuration for the older firmware, now only MODE0 needs to be bridged and connected to 3.3V

A PCB to neatly package a rp2350b with two 12bit high speed adc and four channel audio input for use with hsdaoh

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