I have a setup involving a CraftBeer PI card mounted on a Raspberry PI3 card and a Raspberry 7" LCD Touch screen.
I´m trying to use 2 power sources, because one is not sufficient to run the whole setup.
The Craftbeer PI card requires 12V/5A and it has an adjustable stepdown “buck” that is set to deliver 5.1V to the Raspberry PI below. The CbPi card/RbPI is powered via a MDR-60-12 transformator (see pictures).
The screen is attempted powered via another MDR giving 5V/3A.
However, the system/screen is not powering up/booting.
Does anyone have an idea of what I´m doing wrong here?
PS! I have measured Volts & Amps using a multimeter.