Started: Pick and add supporting passive components: add generic decoupling capacitors at each IC supply pin, I2C pull-up resistors, ferrite beads on power rails, crystal load capacitors, ESD/TVS diodes at USB-C and outputs, and series resistors for audio outputs.

Dispatching Library tool to find: "ESD diode USB-C"

Creating search plan for: "ESD diode USB-C"

Creating search plan for: "ESD diode audio"

Searching: "Search for a general-purpose ESD protection diode used to protect sensitive circuits from electrostatic discharges. This query targets standard clamping devices that are suitable for a variety of signal lines, including those potentially found in audio circuits. The focus is on finding basic ESD protection components that could serve as a starting point for audio applications."

Searching: "Look for a low capacitance, surface-mount ESD diode optimized for audio applications. The device must protect sensitive audio signal paths from ESD events without introducing noticeable signal distortion. Prioritize components with capacitance values ideally below 1 pF, high burst current capability, and packaging that supports miniaturized PCB designs typically found in audio equipment."

Searching: "ESD diode audio"

Searching: "Looking for an SMD-packaged ESD diode specified for USB Type C ports. The ideal part offers fast response to transient voltage spikes with low capacitance and is engineered for modern USB applications, protecting sensitive circuitry without degrading signal performance."

Searching: "Searching for a low capacitance ESD diode optimized for USB-C systems. The component should exhibit rapid transient suppression and minimal parasitic capacitance to preserve signal integrity in high-speed data environments, making it ideal for modern USB-C electronic designs."

Searching: "ESD diode USB-C"

Completed 2 component searches.

Started: Pick and add connectors and peripherals: add a USB-C power-only receptacle with 5.1 kΩ CC resistors; 3.5 mm TRS jacks for line-in and line-out; 2.54 mm header for stereo out; nRF5340-CLAA-R7 I2S header; 0 Ω jumper footprints for I2S master selection; test-pad footprints for power rails, I2C, I2S, reset, boot; input-select switch; and DSP active LED.

Starting 7 component searches

Dispatching Library tool to find: "3.5mm TRS jack"

Dispatching Library tool to find: "Header 4-pin 2.54mm"

Dispatching Library tool to find: "SPDT slide switch"

Creating search plan for: "USB Type-C power only receptacle"

Creating search plan for: "Header 3-pin 2.54mm"

Creating search plan for: "Testpoint pad"

Creating search plan for: "LED 0603"

Searching: "Looking for a standard 3.5mm TRS audio jack intended for PCB mounting applications. This component is used for audio signal interfacing such as headphones or line-level audio. It must have a common mechanical footprint compatible with consumer electronics and support repeated mechanical connections."

Searching: "Identifying a robust 3.5mm TRS jack with a panel mounting option for PCB applications in audio systems. Key criteria include secure panel mounting, stable electrical connection for clear audio transmission, and enhanced durability for repeated use. This query is directed towards connectors often used in applications where mechanical stability and long-term reliability are critical."

Searching: "Seeking a standard surface mount LED in a 0603 package for general PCB indicator applications. The LED should be suitable for low current driving applications, meeting typical brightness and efficiency requirements."

Searching: "Searching for a red LED in a 0603 SMD package that can serve as a status indicator on a PCB. Emphasize high brightness and reliable performance in indicator applications, with industry-standard dimensions and electrical characteristics."

Searching: "Searching for a general-purpose SPDT slide switch designed for PCB mounting. The part should function as a manual, single-pole double-throw device used in user-interface applications. Priority is on compact design and reliable switching performance."

Searching: "Targeting a small form-factor, PCB-mount SPDT slide switch used in portable electronics where space is limited. The device should meet standard mechanical dimensions and offer robust sliding action."

Found 45 results.

Searching: "3.5mm TRS jack"

Searching: "SPDT slide switch"

Searching: "Looking for a PCB header connector that features 4 pins at a 2.54mm spacing. The part should suit applications requiring reliable board-to-board or wire-to-board connections, and it should be available in common configurations like vertical or right-angle orientations for prototyping and assembly."

Found 56 results.

Searching: "Looking for a 3-pin male header connector designed for PCB mounting with a 2.54mm pitch. The component should be suitable for general prototyping or production applications with a single row configuration and through-hole soldering."

Searching: "Looking for a 3-pin header connector with a 2.54mm pitch designed specifically for PCB board mounting. The part should support both prototyping and production needs with reliable mechanical strength and ease of assembly."

Searching: "Searching for a board-mount USB Type-C connector designed strictly for power input. The focus is on a part that supplies 5V power and includes essential USB lines such as VBUS, GND, and CC without high-speed data routing."

Searching: "Looking for a USB Type-C power-only board-mount receptacle. The part should be optimized for power delivery applications, using only the necessary USB power pins (VBUS, GND, CC) and excluding data paths, with robust mechanical design suitable for consumer electronic devices."

Found 51 results.

Found 50 results.

Searching: "Looking for a PCB testpoint pad that is designed as a dedicated copper area for probing signals. Emphasize features like defined dimensions and easy accessibility for test probes in a typical PCB layout."

Searching: "Seeking high-reliability testpoint pads with a gold finish to ensure low contact resistance and durability. Critical for applications involving high-frequency or low-signal measurements where contact quality is paramount in a PCB testing scenario."

Searching: "Header 3-pin 2.54mm"

Searching: "Testpoint pad"

Completed 7 component searches.

Started: Make all net connections: wire 5 V, 3.3 V, 1.8 V rails; connect shared I2C and pull-ups; route clock to ADAU1701; connect EEPROM to ADAU1701 boot pins; connect I2S nets between ADAU1701, ESP32C6, and nRF5340 header; AC-couple line-in signals to ADAU1701 ADC inputs; route ADAU1701 DAC outputs through headphone amp and to stereo line-out; tie CC resistors to USB-C CC1 and CC2 pins; connect all grounds.