You would be able to claim an expense for the projector if you are claiming the safe harbor election and could include the projector under "office expenses" or "supplies" . Otherwise, you would need to include the projector a business asset and claim deprecation (plus IRC Section 179 expense and/or bonus depreciation if you qualify).
See
below about claiming the safe harbor election to expense your office equipment
:
https://ttlc.intuit.com/replies/4682171
