Say i have a UNO R3 or take any Arduino for consideration.
- What will happen if i connects VCC to NEGATIVE POLE OF DC 12V BATTERY
- What will happen if i connects GND to POSITIVE POLE OF DC 12V BATTERY
- What will happen if i used AC 220V INSTEAD DC 12V BATTERY
I JUST WANT TO CONFIRM, DO I NEED A BRIDGE RECTIFIER TO SAVE ARDUINO BOARD?