TMC2290 Decoupling Capacitor(s)

@mrbrush Installation and Troubleshooting is for Problems with the Arduino itself NOT your project. It says so in the description of the section. Therefore I have moved your post here. Please be more careful where you post in future.

You may want to read this before you proceed:-
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0.1uF

Yes

See

http://www.thebox.myzen.co.uk/Tutorial/De-coupling.html