Just got back - haven't had time to read through the rest of the thread yet, but it sounds like you had the same process as me in the beginning, the problem I ran into with the multiple protoboards was that it was simply so much of a giant hassle to run ALL the wires that it wasn't worth it and it was actually easier to build and troubleshoot on one big board and just do it in stages. can't wait to get home and finish my clock. I'm looking forward to this, I might be able to contributeYou should be able to lock the various protoboards together to make a complete clock, but provisions for testing each section will also be made.