Digital Ship's Bells Clock

Hi y'all!

After silently browsing the forum for hours on end and sucking up all the wisdom and experience I could find, here is my first little Arduino project:

The Digital Ship's Bell Clock

This community is amazing and I wish I would have had such a resource when I was working commercially with PICs a few years back. Never got any good at it, but that experience let's me really appreciate all the time and love this community has put into everything.

You rock.

My software runs on a tiny Arduino clone, the Dorkboard:

I also made a little carrier to hold all the components and a 5V regulator:

Hidden under the carrier is a little sparkfun DS1307 RealTimeClock module.

A few words regarding the code. I'm multiplexing the 7SEG directly off the ATMega, no shiftregister or dedicated driver. Because of that I refrained from using delay(). I increment certain variables every main loop cycle instead for specific timing on some of the functions.

 File Name: Shipsbells_120910.pde
 Date: 12/09/2010
 Author: R.Jacobson, with lots of inspiration from the forums
 Special thanks to hari; your multiplexing solution for the sparkfun 7-Segment dislpay
 is what makes this work!
 And to my old friend Mike, for helping me clean up the mess that used to be
 void checkBells() !
 Hardware: Freeduino Dorkboard, 7-Segment Display, 1307 RTC, Speaker

 This program runs a digital clock showing military (24h)
 time and sounds a speaker in the manner of a ship's bell.
 A ship's bell is struck every 30 minutes, with number of strikes increasing
 by that same cycle, culminating in 8 strikes at the 4th hour.
 A day is split into six four-hour shifts: 
 Full hours are struck in groups of two for easier recognition.
 For example, 1530h (3:30pm) would be  (* *)  (* *)  (* *)  (*)
 Three double strikes for the full hours and a single for the half hour.

Unfortunately the entire code was over 9000 characters, too long for the forum (too many explanatory comments? :slight_smile: )

You can find the complete code and a circuit diagram here:

Comments, suggestions, improvements, questions, everything is welcome - I'm just glad to be back in the game :smiley: ! This was a great little practice project. Next one might be a little more sophisticated, but I'm taking one step at a time here ::slight_smile:


Nice for your first project! I think the link doesn't seem to work?

You probably should start a blog if you haven't already if you're planning to make more of these projects :stuck_out_tongue: