Arduino-Controlled Automatic Latch System

I have an Arduino Uno on hand and want to turn it into the brains of a small automatic latch setup. The end goal is simple: when a trigger signal is received, the latch should engage or release without human intervention. I’m open to whatever approach you feel fits best—mechanical relay driving a solenoid, a geared DC or servo solution, even stepper-based control—as long as the motion is reliable and repeatable.

Here’s what I need from you:
• An Arduino sketch that drives the latch open/close cycle, with clearly commented code so I can tweak timings later.
• A wiring diagram showing every component tied back to the Uno.
• A concise parts list (off-the-shelf components only) so I can order exactly what you used.
• Short setup notes: power requirements, safety considerations, and how to recalibrate the stroke if I swap hardware.

You’re free to choose libraries such as Servo.h, AccelStepper, or standard digital I/O if that speeds things up. Keep the logic straightforward—debounce-free inputs and a clean state machine are preferred over flashy extras.

I’ll test by loading your code, following the wiring guide, and confirming the latch cycles smoothly on command. Once that passes, the job is done.