Would an Arduino Uno be suitable for a simple time-based locking circuit?
It is a great occasion to use the Arduino!

There are many tutorials for the Arduino out there, so thats a good place to start. This forum is a good place to ask any Arduino related question if you need to do so.



The following contains MY OPINION

In my opinion, an Arduino Nano would be great for this project. It is really user friendly and can pretty much accomplish many things. A Pro Mini would be better, but seeing sa you're a beginner, stick with the Nano.

A good long lasting batteRY would be a simple USB power bank. It outputs 5V and has a lot of juice. For a locking circuit, a simple servo would work IF THE THINGS THAT IS IN THAT "SAFE" ISN'T 1M $$. A servo does a decent job as a lock.



Good luck!