I hooked up a 9v battery to the VIN, forgot the MKR1000 doesn't go well with 9V and this little thing started to burn. What is it? (The board still works via
Arduino MKR1000 : ID 3156 : $44.95 : Adafruit Industries, Unique & fun DIY electronics and kits
ARDUINO MKR1000
MKR1000 Board - Arduino | Mouser
IoT LearningAn introduction to the Arduino MKR1000 for IoT projects - IoT Learning