Some links in previous steps all in one place: Notification bell Firmware for Forebrain: https://github.com/downloads/meseta/Ding-for-Forebrain/firmware.bin Bell trigger app for Windows: https://github.com/downloads/meseta/Ding-for-Forebrain/ding1.zip Source code: https://github.com/meseta/Ding-for-Forebrain Where to buy Forebrain: ...
The three pins on the lower right of the Forebrain board is where you can get the GND and 5V supply from, and the firmware is set up to use Port 2, Pin 11 to drive the transistor. See the circuit diagram attached.
Careful of the polarity of the capacitor, and the pinout of the transistor!
Solder the other components in based on the circuit diagram. Make sure the bell does not touch any of the components when it is replaced. Bend the pins and install components horizontally if necessary