5volt

Hello everyone, I’m currently working on a project that involves using an NPK sensor that operates at 5V, along with an ESP module. For power, I’m planning to use an 18650 battery rated at 3.7V. I’m wondering about the best way to design the circuit to power for both the NPK sensor and the...

I have 3 AC to DC transformers powered by same breaker AC breaker: 1. 120ac to 48v dc 2. 120ac to 24v dc 3. 120ac to 12v dc 4. 12v dc to 9v dc step down to power Arduino 5. 5v dc sensor system powered by Arduino board and ground from Arduino board Is it possible to have one neutral/ground bar...

As the title suggest this is a first draft of a custom PCB by yours truly. So as you may notice, I'm not an electrical engineer just a hobbyist. I used EasyEDA for this project, and to the best of my knowledge selected the right parts from LCSC component library. I would love if someone could...