The main components of the fridge buzzer consist of an MSP430G2232 low-power MCU connected to a SI7201 hall sensor switch, along with a CR2032 battery holder, push button and buzzer. The MSP430 ...

The call takes 10 seconds to initiate after the button press, and the audio hardware doesn’t do a great job of recreating the buzzer noise from the game. However, it’s a good starting point ...