Cortex v0 tiny AI wearable schematic: Raytac MDBT53V-1M BLE/nRF5340 module, USB-C LiPo charging, TPS63020 3.3V buck-boost, dual microphones, QSPI flash, tactile button, and WS2812B LED on a ~30mm round 4-layer PCB.

BarbellAI Clip V1 BLE IMU clip using Raytac MDBT50Q-1MV2 (nRF52840) MCU/radio with external 32.768 kHz LFXO, ICM-42688-P IMU, USB-C protected power entry, and 3.3 V AP2112K-class regulator rail.