"A picture can be worth a 1000 words".

Here is how to hook up the PNP transistor to the port pins. In this diagram the buzzer is assumed to be a nominal 5 volt type piezo element. If your buzzer is rated less then 5 volts you may need to put a resistor in series with it. If your buzzer in inductive in nature it may be well to put a diode in parallel with it (anode to GND and cathode toward PNP collector).



Michael Karas

Note: Craig .... these little pictures are each taking a small amount of space on your server via my user page on 8052.com. I am close to the storage limit.....help.