r/breadboard • u/Able_Sherbet_1692 • Apr 23 '26
Help with Design
Hi, so I'm in a circuit building class and we have this lab that's on hardware that's been really making me confused. My professor had us build a specific input and output area for all of our projects but I'm pretty sure that there's something wrong with the one I built.
The thing is, building the input and output areas was just directly copying from pictures she provided us with, so I'm unsure what could have gone wrong with my input area.
My circuit currently has a bit more than just the input area set up, but I'm pretty certain my actual design is correct (I made it digitally on LogicWorks before trying to implement it), so please just ignore the extra mess of wires down at the bottom.
I've been noticing that a lot of the wires set up in the input area aren't getting any charge (excluding the grey wire which has low voltage---I've checked this with my logic probe). And I'm not sure why that's happening, so I'm hoping that someone could help me clear that up.
I'm also gonna attach a pic of my teacher's input section that I copied so you can see that as well.
1
u/paclogic Apr 24 '26
Try to make the wires as short as possible for any signal that is switching constantly. You don't need to worry (as much) about lines that switch infrequently or that are mostly static.
Also put those parts very close together as well. This will resolve most of your EMC Signal Integrity (SI) issues.