Pololu 3.3V 6.5A Step-Down Voltage Regulator (D36V50F3) Brand_Western Digital with SPI control and a

with SPI control and a touchscreen controller as well

ports are limited to 500mA

executing your program until you find the place that causes your fault

just unplug the Arduino from USB or the wall adapter and it will automatically switch over to shield power

Pololu 3.3V 6.5A Step-Down Voltage Regulator (D36V50F3) Brand_Western Digital with SPI control and aThe D36V50Fx family of buck (step down) voltage regulators from Pololu generates lower output voltages from input voltages as high as 50V. This particular model offers an output of 3. 3V with a continuous output current of 6. 5A. They are switching regulators (also called switched mode power supplies (SMPS) or DC to DC converters), which makes them much more efficient than linear voltage regulators, especially when the difference between the input and