I am currently powering a pi 3b+ Through a buck converter hung from a 24v p/s. I wanted both 5v (pi) and 12v. (LEDs). I’ve been getting some undervoltage warning from octoprint and my setup is the problem. At present. I have a 24v p/s (240w) feeding a buck converter outputting 12v. That, in turn, is. Split between a small string (5) of. LEDs and another buck converter outputting 5v to the arduino.
My question: being the guy with the fork in the toaster most of the time, was this so bad an idea that these warning messages are telling me so?
What other load is on the 24V power supply and what is the load on the buck converter. If you can do it i would suggest moving the 5V input to the Vin and upping the voltage to about 8V. I use this approach as much as possible, the extra filtering never hurts and many times helps.