3D rendering of the populated PCB

• BC548 NPN transistor (quantity 2) https://www.digikey.com/en/products/detail/diotec-semiconductor/BC548B/22191318

• 8 pin, 5mm pitch screw or Wago terminal connector https://www.digikey.com/en/products/detail/amphenol-anytek/VI0801550000G/2261365 https://www.digikey.com/en/products/detail/amphenol-anytek/QT08ASB83H0000G/25618859

• Seeed ESP32C6 microcontroller https://www.amazon.com/ESP32C6-Supports-Bluetooth-802-15-4-Microsoft/dp/B0DRNW9LJM/

• Adafruit MPM3610 https://www.adafruit.com/product/4739

• Buzzer, passive piezo https://www.digikey.com/en/products/detail/tdk-corporation/PS1240P02BT/935924

• Schottky diode https://www.digikey.com/en/products/detail/stmicroelectronics/1N5819/1037326

• 220k resistors

• 10k resistors

• 150 resistors