I am new to not only this forum but also to arduino in general, so please forgive me for my ignorance. I am very excited to learn more about this awesome microcontroller and try it out!
Anyway, I was wondering about the maximum voltage that an arduino can output. Is it possible to use an arduino as a step-up regulator? And is there a maximum voltage that one can draw from an arduino? Specifically I am seeking to drive an ultrasonic transducer and would like to do so with more voltage.
Arduino's output is 5v, at fairly limited current: usually enough to power sensors (if the voltage is right) but not for actuators like motors etc.
is there a maximum voltage that one can draw from an arduino
You don't draw voltage, you draw current. Why would you want to drive your sensor with "more voltage"? More than what?- more than what it's supposed to get? Check its datasheet, and stick to giving it what it expects. If that's 3.3 or 5 v, at a low current , and along with other things connected is within Arduino's current, then hook it up. If it's over 5v, or needs too much current, then you'll need to give it its own supply. (I forget the exact current Arduino can provide)
