Completed schematic, 2-layer PCB layout, LCSC bill of materials, and acoustic enclosure CAD for BlareClock (Seeed XIAO RP2040, DS3231M I2C RTC with CR2032 backup, HT16K33 7-segment display driver, and PAM8403 3W Class-D audio amplifier). Verified alarm set/snooze/dismiss state machine in firmware and interactive web twin.