[systemshacker]

Building a cpu using 74 series logic was a required project in our undergraduate micro-architecture course. It was a fun time debugging the bread boards! First time we learnt the fact that voltage at one end of bread board to the other drops due to resistance so 5V gates do not work if power supply is not connected close enough.

[greglindahl]

I know a startup that wasted $10mm (and precious time to market) because of a similar issue. They wish they'd learned this lesson much earlier!