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Old 22 May 2014, 19:47   #418
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Join Date: Sep 2006
Location: Thunder Bay, Canada
Posts: 3,670
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

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