Quote Originally Posted by Joe S. View Post
Hi Sayzer,
as long as the supplies have common ground? You might try "Digital Transistors" and eliminate the base resistor. Why use PNP at all ?
Hi Joe,

My point was not what you meant.
If a PNP transistor is supplied by 9V, and you drive it with +5V (less than 9V), then the transistor will not be ignited as you expect.

As easy as having it tested on real circuit.
Just drive an LED via PNP transistor by a PIC, ON and OFF.
You will see that LED will not fully turn OFF.

And for the subject, our friend should use NPN, or for the easniness, use ULN2003, ULN2803.