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Old 30 September 2015, 21:35   #32
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Join Date: Sep 2012
Location: Copenhagen / DK
Age: 38
Posts: 3,695
Originally Posted by 1NOM155 View Post
Hi Demo, I know this is a old post, but why you should connect PIN's 9, 10, 12 and 13 of IC to GND?
Because those pins are inputs and inputs should never be left floating (unless they have internal pull-ups/downs). If they are floating, their corresponding outputs may flicker which causes higher power consumption and generates noise.
I built the circuit, only I used a 7404 instead as that was what I had. It works great with my 2001FP monitor.
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