PCB Design Walkthrough: ESP32-S3, ADC, MEMS Mic Array, USB-C & RF Antenna

Published at : 23 Dec 2025

In this video, we take a deep dive into the PCB design of a compact, power-efficient wearable device featuring the ESP32-S3, a microphone array, USB-C power management, and a PCB antenna. This design is built for real-time transcription and note-taking, making it an exciting hardware project for engineers and enthusiasts alike!

This ESP32-S3-based PCB design focuses on power efficiency, audio processing, and RF performance, making it ideal for wearable applications. If you're interested in hardware design, PCB layout, or ESP32 projects, this breakdown will provide valuable insights!

💬 What do you think about this design? Share your thoughts, optimizations, or questions in the comments!

Project Link: https://www.flux.ai/collinsemasi/biskuit-ai-project-showcase?utm_source=organic+social&utm_medium=youtube&utm_campaign=design+walkthrough


Resources
📺 PCB Layout Best Practices Video: http://youtube.com/watch?v=CtxEjmoIRpI
🧠 AI Auto Layout video: https://www.youtube.com/watch?v=JlNsPRh_x-w
🔣 Parametric Schematic Symbols: https://www.youtube.com/watch?v=fWENBb0Qx_Q
📖 ESP32-S3 Hardware Design Guidelines: https://docs.espressif.com/projects/esp-hardware-design-guidelines/en/latest/esp32/index.html


Timestamps
00:00:00 - Introduction
00:00:52 - Where to find resources
00:01:09 - Block diagram
00:02:47- Power management circuit (Battery Charging, LDO, and MOSFET Switch)
00:04:25 - Parametric Schematic Symbols
00:05:00 - ESP32 Microcontroller
00:08:20 - Microphone Array
00:09:18 - ADC
00:10:16 - PCB Layout and Routing
00:12:54 - Conclusion