So what is it?
Did you figure it out, or did it sort itself out?
How can you have both?
Anyway,
Congratulations with your first KiCad project!
A little bit of both. Once I moved the first component, the process became obvious (well almost). It took a bit of thinking but in the end it became more intuitive.
Hotkey āMā I suppose.
My way is to move Pcb window to the left (so it is set to use half of my screen), and schematic window to the right (right half of screen). I donāt have two monitor setup, but the process of footprint placement is the only one I really need to see pcb and schematic at once.
Whenever I move any footprint (one by one) the right symbol at schematic is highlighted (and schematic moved in window as needed) so I see what I have grabbed. My first action is to divide footprints into groups according to my schematic (I use much bigger space than my PCB will be). Later I make order in each group.
As my PCBs are defined according to conception āwhole bottom is GNDā I donāt want to see GND net during element placement as I want to see only connections I will have to find the way to route them. To hide GND net I place temporary a big GND zone at top and frequently use āBā hotkey.
I know 1117 regulators much longer (I had Burr-Brown paper catalog with REG1117 in it). In my opinion it was one of first attempts to make regulator with dropout as low as possible but without changing NPN to PNP so I donāt expect serious stability problems with these regulators. I didnāt used them because I donāt like their 5mA quiescent current.
Each time I was looking around in linear regulators I was checking if there is something new in 1117 family and few years ago I found LDL1117 with 0.25mA quiescent current so I used it. They write that it is stable with ceramic capacitors and that capacitors have to be as close to IC as possible, but from pictures of stability I see ESR of 20 mĪ© is needed. As Iām not sure if ceramic capacitors I use donāt have lower ESR I didnāt connected it as short as possible but I intentionally added some mm of track to increase ESR seen by IC a little.
My standard choice for 5V is 78M05 in DPACK (tolerates higher input voltage than 1117). But if you have only 7.5V at input and may be a diode as protection against reverse voltage connection then selecting regulators with lower dropout is right.
The other question is if you care/donāt care of 10mA lost for regulators.
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