Is it safe (for the Pi) for all powered systems to be derived from a single 12V source with one (or two) buck converters handling the 5V requirements? If I were to use this system, would it be safer (again, for the Pi) to have the 12V line split and use a single buck converter for each 5V component...

I'm actually not powering anything via the Pi - just using the GPIO output signals to toggle the relay modules. I may have written my original post poorly, so I've made some substantial changes to the content and organization of it. To summarize: my control over the system is working without any pro...

My knowledge of electronics is extremely limited. I only ever took one semester of electrical engineering courses in college, and don't remember most of it. Although I've picked up quite a bit, and remembered quite a bit, from this project it would be safest to assume I know next to nothing on the s...

I appreciate the pointer to the sticky - I hadn't fully read through the first post the first time since my board was working as intended, but it still had some interesting points to make. Namely being that it says hooking the VCC to 3.3v shouldn't be enough to drive the output of the opto-isolator ...

I'm working on a project for work that involves controlling a bunch (minimum 6) of solenoid locks with a Pi 4. So far, the setup is as follows: Powering the Pi via stock usb-c Controlling a shift register (with the future intent of chaining multiple) to get the output signals for An 8-module 5V low-...