electronics question

what diode do i need to drop 3.5v to 3.0v?

Impossible to answer unless you provide more information.

What are you trying to do exactly? What's the load?

All Silicon Diodes have a forward voltage drop of 0.7V

Im taking an electronics class and I kinda know what yall are talking about but not enough to answer ur question lol

Or a resistor

you could use a 3v zener to hold the voltage a 3v