I'm having a bit of a problem with my 2009 15" MacBook Pro. The Status Indicator Light is not working. (the one that "breathes" when the laptop is sleeping) I only noticed it yesterday and thought ...

His boss instigated a free/busy indicator using coloured cards, but he felt he could do one better and came up with an IoT status light to do the job. At its heart is a machinery status light of ...