ESP32-S3 Mini 1U with i2S mic and SDNAND (sdmmc flash) pcb design validation

n a previous post, I shared the schematic for an ESP32‑S3‑based board. I’ve made some progress since then and I’m now sharing the BOM and PCB layout.
Any feedback, criticism, or suggestions are welcome.
I’m still a beginner in electronics design, and while I try to research as much as possible, I’m sure I’m missing some PCB design best practices.
Thanks in advance, and have a nice day !

https://preview.redd.it/af8d6imb6gdg1.png?width=1253&format=png&auto=webp&s=3a54e6d37fde2a2c358dce5c2a68d018e207f5f5

https://preview.redd.it/1q8qvrc96gdg1.png?width=892&format=png&auto=webp&s=3d61f85e328209da21b2c02d51a2623daba74972

https://preview.redd.it/2kq41nf86gdg1.png?width=907&format=png&auto=webp&s=a8bae2cbb71d3d910c1e3f6b20e49d12625b581d

https://preview.redd.it/4jflr3wa6gdg1.png?width=881&format=png&auto=webp&s=320b86f0c42305035397ebd76a156dab0af90eda

https://preview.redd.it/xn6v1elc6gdg1.png?width=715&format=png&auto=webp&s=5f09a42f79823f173d3177d8bc6a74a13dfb223d

Posted Jan 15, 2026, 5:17 AM UTC

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