I need to power a 5V alarm on a Digital Out. I know the out is only 3.3V. Any idea on how to power the alarm? Thanks!
Use a transistor to switch the 3V3 to 5V.
What alarm is this and how much current does it take?
It is actually a 6VDC 20mA buzzer. It works fine at 5VDC though
OK then just use the first diagram in this link:-
http://www.thebox.myzen.co.uk/Workshop/Motors_1.html
Substitute your alarm for the motor.
Thanks for the help! (::runs to radioshack: