74147N does not only get no change in display

Hello

I built a simple circuit. I can't make it work.  I tested each section of the scheme and they operate except once the 74147 is connected.

It seems as if the 74147 is not powered.  Can someone explain or help me make it work?

Thank you.

Ray

Hi Ray,

I had a glance on your circuit and I think you should add some pull ups at the entrance of the 74147. While it is probably not necessary in an environment calm in real life, it is convenient to good design to do and to avoid EMI problems down the road.

Attached, is that your circuit modified with 9 pull up of resistance.

Hope that helps.

Tags: NI Software

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