One pin is driven from an ARM output, altering the supply voltage won't make any difference to the brightness. Most pins can only supply 3 mA. The power LED is probably driven from the regulated 3.3 V supply, and should remain the same.
One pin is driven from an ARM output, altering the supply voltage won't make any difference to the brightness. Most pins can only supply 3 mA. The power LED is probably driven from the regulated 3.3 V supply, and should remain the same.