adnbr/Digital-Logic-Clock — pull request #1 by adnbr (2012-10-11 09:02:13+00:00)
Title: Scmitt trigger debouncing

Replacing the 555 timer debouncing with Schmitt inverters to reduce component count and standardise across the boards. Frees up a few more inverters allowing for power on reset and buffering of key signals for use elsewhere.