I’m in the US but I use the old 12W iPad chargers I have around the house.
5.2v - 2.4A with stock Norns and Shield. Plus they look nice! It uses a plug adapter of sorts. The new USB C iPad chargers with a C to Mini-B cable would be slick but we are entering luxury power adapter territory
You are looking for a power supply with the correct voltage and sufficient amperage to feed your norns. 2.5 amps in this case will provide a bit more available power for hungry usb externals if needed.
The additional amperage will not be an issue, something under powered however would likely cause issues under heavy processor load.
sorry to resurrect this old thread, as you can see above, I bought the official UK Rasberry Pi Power Supply and a USB C to Micro adaptor to connect it to my Norns Shield .
Its power rating is 5.1V 3.0A15.3W
I had been told that the extra power is good as an overhead of sorts, but I am just wanting to query something.
Is it possible that this Extra power is being transferred into excess heat on the Pi?
I ask because I am getting the three exclaimation signs when monitoring CPU ( !!! ) on the shield, even though the CPU percentage is itself not passing the 65% mark.
to try and reduce power, I have a Neotrellis board connected to my Shield that, I have just updated to the “Palleted” hex file so I can reduce the brightness, but the !!! seem to persist.