MRK1000 smoking with battery and USB both connected - MKR1000 - Arduino Forum
MKR 1000 WiFi Battery Life | Arduino Documentation
Arduino MKR1000 WiFi with headers mounted
Amazon.com: Arduino MKR1000 WiFi with Headers [ABX00011] : Electronics
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