Re: Incrementer question

Posted by Jorge on Apr 15, 2011; 7:39am
URL: http://nand2tetris-questions-and-answers-forum.52.s1.nabble.com/Incrementer-question-tp2746811p2823677.html

Hi, you wrote: "Connecting an input pin to 0V causes current to flow out of the input (the current came into the IC from its V+ power pin) and this outbound current is what the IC actually detects as FALSE. The reverse happens when an input pin is connected to 5V. Current flows into the input (and out the IC's ground pin) and is detected as TRUE. "

Can you please elaborate more on this, I am not sure I fully understand this. What do you mean by outbound current and how does the IC detects an outbound current? I can "see" how voltage would cause electrons to circulate but that's about as far as I see.