Can the Uno power 3 servos,
No. The Uno shouldn’t be used to power any servos. Use an external power source for servos (grounds connected).
Yeah I understand that now, cheers.
If I do it like this diagram am I right in thinking it will work?
Digital pins 2, 3, 4, 5 & 10, 11, 12, 13 are used by wave Shield in the default setup, which doesn’t leave so much. There are other ways to generate sounds, but if you want to play audio clips that’s a straightforward way. Depending on your project you might find a 2nd Arduino to run the steppers would be an option. There’s still plenty of pins available to signal a 2nd microcontroller.
Cheers Goeff - It’s been a while since a used my Arduino and wave shield. As the wave shield has pins 6, 7, 8, 9 and the 6 analog in pins, 14-20 unused. If that diagram is correct 2 pins will be used for the servos, which will mean I’ll be able to use the rest of the unused pins for my sensors. Is this correct or am I missing something?
Cheers if these questions are super amateur.