Boards in 3 GitHub repositories, designed in KiCad, that use the CST-931AP by CUI (-20℃~+60℃ 2.73kHz 2V~4V 5mm 85dB 9mm Electromagnetic Passive (Externally Driven) 插件,D=9mm Buzzers ROHS). See how each wires it, with its parts, size, README and files; the CST-931AP’s symbol, footprint and pinout are on its own page.
nakul-biovaco/Embedsys-embedded-educational-board
Industrial-grade ESP32-WROOM-32E educational development board (4-layer ENIG PCB, BQ24075 power-path, dual regulators, ST7789 IPS display & SHT40 sensor). 0 DRC certified.
Akhilesh-design-02/STM32F407-Hardware-Design
4-layer STM32F407 mixed-signal PCB design featuring I2C/I2S/USB interfaces, SGP40 & SHT40 sensors, power plane splits, and star grounding for noise isolation.