I have been looking in adding a way for the clock to signal the number of hours but implementing a mechanical bell is... well it needs space, we want a uniform design so nothing "sticking out" so to speak. Would the click of relay be satisfying enough? I will record what it sounds like sometime soon. We welcome any feedback.

In the mean time, this is it clicking every seconds.

"I changed the behavior of the relay so that, every hour, it clicks the number hours.

For example 4Pm would click 4 times.

I added a little 5v relay that click every seconds. This is more of a proof of concept to see how well it works. Will eventually set is so it doesn't click at night.

Although it doesn't seems like it the clicker is in perfect sync with the seconds changing."