Originally Posted by kipper2k
Here is an updated buzzer mod, uses a 5v buzzer now connected to the 5v rail ...
1 x BC547 or similar bipolar transistor
1 x 1k resistor
1 x magnetic type buzzer (Digikey # 668-1373-nd
below shows the buzzer attached to the top part of the case, fits nicely
Transistor bipolar BS270 is work for this mod?